use chrono::prelude::*;
use isolang::Language;
use std::{
    collections::{HashMap, HashSet},
    sync::{
        mpsc::{channel, Receiver, Sender},
        Arc, RwLock,
    },
    thread::spawn,
    time::Duration,
};
use uuid::Uuid;

#[cfg(test)]
mod support_test {
    use std::time::Duration;

    pub static TIMEOUT: Duration = Duration::from_millis(500);
}

#[derive(Clone, Debug)]
enum MTTError {
    DocumentAlreadyExists(String),
    DocumentFieldAlreadyExists(String, Field),
    DocumentFieldMissing(String),
    DocumentFieldNotFound(String),
    DocumentFieldWrongDataType(FieldType, FieldType),
    DocumentNotFound(String),
    FieldDuplicate(String, Field),
    NameDuplicate(Name),
    NameInvalidID(Uuid),
    NameMissingTranslation(Language),
    NameNotFound(Name),
    QueryCannotChangeData,
}

#[derive(Clone, Debug, Eq, Hash, PartialEq)]
enum Action {
    Addition,
    Create,
    Delete,
    Error,
    Query,
    Register,
    Reply,
    Show,
    Update,
}

impl From<MsgAction> for Action {
    fn from(value: MsgAction) -> Self {
        match value {
            MsgAction::Addition(_) => Action::Addition,
            MsgAction::Create(_) => Action::Create,
            MsgAction::Delete(_) => Action::Delete,
            MsgAction::Error(_) => Action::Error,
            MsgAction::Query(_) => Action::Query,
            MsgAction::Register(_) => Action::Register,
            MsgAction::Reply(_) => Action::Reply,
            MsgAction::Show => Action::Show,
            MsgAction::Update(_) => Action::Update,
        }
    }
}

impl From<&MsgAction> for Action {
    fn from(value: &MsgAction) -> Self {
        let action = value.clone();
        Self::from(action)
    }
}

#[derive(Clone, Debug, Eq, Hash, PartialEq)]
enum NameID {
    ID(Uuid),
    Name(String),
    None,
}

impl NameID {
    fn is_none(&self) -> bool {
        match self {
            Self::None => true,
            _ => false,
        }
    }
}

impl From<&str> for NameID {
    fn from(value: &str) -> Self {
        Self::Name(value.to_string())
    }
}

impl From<String> for NameID {
    fn from(value: String) -> Self {
        Self::Name(value)
    }
}

impl From<Uuid> for NameID {
    fn from(value: Uuid) -> Self {
        Self::ID(value)
    }
}

impl From<&NameID> for NameID {
    fn from(value: &NameID) -> Self {
        value.clone()
    }
}

#[derive(Clone, Debug)]
enum MsgAction {
    Addition(Addition),
    Create(DocDef),
    // Alter
    // Remove
    Error(MTTError),
    Query(Query),
    Register(Register),
    Reply(Reply),
    Show,
    Delete(Delete),
    Update(Update),
}

impl From<Addition> for MsgAction {
    fn from(value: Addition) -> Self {
        MsgAction::Addition(value)
    }
}

impl From<Delete> for MsgAction {
    fn from(value: Delete) -> Self {
        MsgAction::Delete(value)
    }
}

impl From<DocDef> for MsgAction {
    fn from(value: DocDef) -> Self {
        MsgAction::Create(value)
    }
}

impl From<MTTError> for MsgAction {
    fn from(value: MTTError) -> Self {
        MsgAction::Error(value)
    }
}

impl From<Query> for MsgAction {
    fn from(value: Query) -> Self {
        MsgAction::Query(value)
    }
}

impl From<Register> for MsgAction {
    fn from(value: Register) -> Self {
        MsgAction::Register(value)
    }
}

impl From<Reply> for MsgAction {
    fn from(value: Reply) -> Self {
        MsgAction::Reply(value)
    }
}

impl From<Update> for MsgAction {
    fn from(value: Update) -> Self {
        MsgAction::Update(value)
    }
}

#[cfg(test)]
mod msgactions {
    use super::*;

    #[test]
    fn turn_document_definition_into_action() {
        let value = DocDef::new();
        let result: MsgAction = value.into();
        match result {
            MsgAction::Create(_) => {}
            _ => unreachable!("Got {:?}: dhould have been create", result),
        }
    }

    #[test]
    fn turn_error_into_action() {
        let data = "data".to_string();
        let value = MTTError::DocumentAlreadyExists(data.clone());
        let result: MsgAction = value.into();
        match result {
            MsgAction::Error(result) => match result {
                MTTError::DocumentAlreadyExists(output) => assert_eq!(output, data),
                _ => unreachable!("Got {:?}: dhould have been create", result),
            },
            _ => unreachable!("Got {:?}: dhould have been create", result),
        }
        let value = MTTError::DocumentNotFound(data.clone());
        let result: MsgAction = value.into();
        match result {
            MsgAction::Error(result) => match result {
                MTTError::DocumentNotFound(output) => assert_eq!(output, data),
                _ => unreachable!("Got {:?}: dhould have been create", result),
            },
            _ => unreachable!("Got {:?}: dhould have been create", result),
        }
    }

    #[test]
    fn turn_query_into_action() {
        let value = Query::new();
        let result: MsgAction = value.into();
        match result {
            MsgAction::Query(_) => {}
            _ => unreachable!("Got {:?}: dhould have been query", result),
        }
    }

    #[test]
    fn turn_reply_into_action() {
        let value = Reply::new();
        let result: MsgAction = value.into();
        match result {
            MsgAction::Reply(_) => {}
            _ => unreachable!("Got {:?}: dhould have been reply", result),
        }
    }
}

#[derive(Clone, Debug)]
struct Message {
    msg_id: Uuid,
    document_id: NameID,
    action: MsgAction,
}

impl Message {
    fn new<D, A>(doc_id: D, action: A) -> Self
    where
        D: Into<NameID>,
        A: Into<MsgAction>,
    {
        Self {
            msg_id: Uuid::new_v4(),
            document_id: doc_id.into(),
            action: action.into(),
        }
    }

    fn get_message_id(&self) -> &Uuid {
        &self.msg_id
    }

    fn get_document_id(&self) -> &NameID {
        &self.document_id
    }

    fn get_action(&self) -> &MsgAction {
        &self.action
    }

    fn response<A>(&self, action: A) -> Self
    where
        A: Into<MsgAction>,
    {
        Self {
            msg_id: self.msg_id.clone(),
            document_id: self.document_id.clone(),
            action: action.into(),
        }
    }
}

#[cfg(test)]
mod messages {
    use super::*;

    #[test]
    fn can_the_document_be_a_stringi_reference() {
        let dts = ["one", "two"];
        for document in dts.into_iter() {
            let msg = Message::new(document, MsgAction::Create(DocDef::new()));
            match msg.get_document_id() {
                NameID::Name(data) => assert_eq!(data, document),
                _ => unreachable!("should have been a string id"),
            }
            match msg.get_action() {
                MsgAction::Create(_) => {}
                _ => unreachable!("should have been a create document"),
            }
        }
    }

    #[test]
    fn can_the_document_be_a_string() {
        let dts = ["one".to_string(), "two".to_string()];
        for document in dts.into_iter() {
            let msg = Message::new(document.clone(), MsgAction::Query(Query::new()));
            match msg.get_document_id() {
                NameID::Name(data) => assert_eq!(data, &document),
                _ => unreachable!("should have been a string id"),
            }
            match msg.get_action() {
                MsgAction::Query(_) => {}
                _ => unreachable!("should have been an access query"),
            }
        }
    }

    #[test]
    fn can_the_document_be_an_id() {
        let document = Uuid::new_v4();
        let msg = Message::new(document.clone(), MsgAction::Query(Query::new()));
        match msg.get_document_id() {
            NameID::ID(data) => assert_eq!(data, &document),
            _ => unreachable!("should have been an id"),
        }
        match msg.get_action() {
            MsgAction::Query(_) => {}
            _ => unreachable!("should have been an access query"),
        }
    }

    #[test]
    fn is_the_message_id_random() {
        let mut ids: Vec<Uuid> = Vec::new();
        for _ in 0..5 {
            let msg = Message::new("tester", MsgAction::Create(DocDef::new()));
            let id = msg.get_message_id().clone();
            assert!(!ids.contains(&id), "{:?} containts  {}", ids, id);
            ids.push(id);
        }
    }

    #[test]
    fn Can_make_reply_message() {
        let name = "testing";
        let msg = Message::new(name, MsgAction::Query(Query::new()));
        let responce = Reply::new();
        let reply = msg.response(responce);
        assert_eq!(reply.get_message_id(), msg.get_message_id());
        match reply.get_document_id() {
            NameID::Name(data) => assert_eq!(data, name),
            _ => unreachable!("should have been a name"),
        }
        match reply.get_action() {
            MsgAction::Reply(_) => {}
            _ => unreachable!("should have been a reply"),
        }
    }

    #[test]
    fn Can_make_error_message() {
        let name = "testing";
        let msg = Message::new(name, MsgAction::Query(Query::new()));
        let err_msg = Uuid::new_v4().to_string();
        let result = msg.response(MTTError::DocumentNotFound(err_msg.clone()));

        assert_eq!(result.get_message_id(), msg.get_message_id());
        match result.get_document_id() {
            NameID::Name(data) => assert_eq!(data, name),
            _ => unreachable!("should have been a name"),
        }
        match result.get_action() {
            MsgAction::Error(data) => match data {
                MTTError::DocumentNotFound(txt) => assert_eq!(txt, &err_msg),
                _ => unreachable!("got {:?}, should have received not found", data),
            },
            _ => unreachable!("should have been a reply"),
        }
    }

    #[test]
    fn can_make_a_response_message() {
        let doc_id = Uuid::new_v4();
        let msg = Message::new(doc_id.clone(), MsgAction::Query(Query::new()));
        let data = Uuid::new_v4().to_string();
        let result1 = msg.response(MTTError::DocumentNotFound(data.clone()));
        let result2 = msg.response(Reply::new());
        assert_eq!(result1.get_message_id(), msg.get_message_id());
        assert_eq!(result2.get_message_id(), msg.get_message_id());
        assert_eq!(result1.get_document_id(), msg.get_document_id());
        assert_eq!(result2.get_document_id(), msg.get_document_id());
        let action1 = result1.get_action();
        match action1 {
            MsgAction::Error(err) => match err {
                MTTError::DocumentNotFound(output) => assert_eq!(output, &data),
                _ => unreachable!("got {:?}: should have received document not found", err),
            },
            _ => unreachable!("got {:?}: should have received error", action1),
        }
        let action2 = result2.get_action();
        match action2 {
            MsgAction::Reply(data) => assert_eq!(data.len(), 0),
            _ => unreachable!("got {:?}: should have received a reply", action2),
        }
    }
}

#[derive(Clone, Debug, Eq, Hash)]
enum Include<T> {
    All,
    Some(T),
}

impl<T: PartialEq> PartialEq for Include<T> {
    fn eq(&self, other: &Self) -> bool {
        match self {
            Include::All => true,
            Include::Some(data) => match other {
                Include::All => true,
                Include::Some(other_data) => data == other_data,
            },
        }
    }
}

#[cfg(test)]
mod includes {
    use super::*;

    #[test]
    fn does_all_equal_evberything() {
        let a: Include<isize> = Include::All;
        let b: Include<isize> = Include::Some(5);
        let c: Include<isize> = Include::Some(7);
        assert!(a == a, "all should equal all");
        assert!(a == b, "all should equal some");
        assert!(b == a, "some should equal all");
        assert!(b == b, "same some should equal");
        assert!(b != c, "different somes do not equal");
    }
}

#[derive(Clone, Eq, Hash, PartialEq)]
struct RouteID {
    action: Option<Action>,
    doc_type: Option<Uuid>,
    msg_id: Option<Uuid>,
}

impl From<Route> for RouteID {
    fn from(value: Route) -> Self {
        Self {
            action: match value.action {
                Include::All => None,
                Include::Some(action) => Some(action.clone()),
            },
            doc_type: match value.doc_type {
                Include::All => None,
                Include::Some(doc) => Some(doc.clone()),
            },
            msg_id: match value.msg_id {
                Include::All => None,
                Include::Some(id) => Some(id.clone()),
            },
        }
    }
}

#[derive(Clone, Debug, Eq, Hash, PartialEq)]
struct Name {
    name: String,
    lang: Language,
}

impl Name {
    fn get_language(&self) -> &Language {
        &self.lang
    }

    fn english(name: String) -> Self {
        Self {
            name: name,
            lang: Language::from_639_1("en").unwrap(),
        }
    }

    fn japanese(name: String) -> Self {
        Self {
            name: name,
            lang: Language::from_639_1("ja").unwrap(),
        }
    }
}

impl ToString for Name {
    fn to_string(&self) -> String {
        self.name.clone()
    }
}

#[derive(Debug)]
struct Names {
    names: HashMap<Name, Uuid>,
    ids: HashMap<Uuid, HashMap<Language, Name>>,
}

impl Names {
    fn new() -> Self {
        Self {
            names: HashMap::new(),
            ids: HashMap::new(),
        }
    }

    fn add_name(&mut self, name: Name) -> Result<Uuid, MTTError> {
        if self.names.contains_key(&name) {
            return Err(MTTError::NameDuplicate(name));
        }
        let mut id = Uuid::new_v4();
        while self.ids.contains_key(&id) {
            id = Uuid::new_v4();
        }
        self.names.insert(name.clone(), id.clone());
        let mut holder: HashMap<Language, Name> = HashMap::new();
        holder.insert(name.get_language().clone(), name);
        self.ids.insert(id.clone(), holder);
        Ok(id)
    }

    fn add_translation(&mut self, name: Name, translation: Name) -> Result<Uuid, MTTError> {
        let id = match self.get_id(&name) {
            Ok(data) => data.clone(),
            Err(err) => return Err(err),
        };
        match self.get_id(&translation) {
            Ok(_) => return Err(MTTError::NameDuplicate(translation)),
            Err(_) => {}
        }
        let holder = self.ids.get_mut(&id).unwrap();
        holder.insert(translation.get_language().clone(), translation.clone());
        self.names.insert(translation, id);
        Ok(id.clone())
    }

    fn get_name(&self, id: &Uuid, lang: &Language) -> Result<Name, MTTError> {
        match self.ids.get(id) {
            Some(langdb) => match langdb.get(lang) {
                Some(name) => Ok(name.clone()),
                None => Err(MTTError::NameMissingTranslation(lang.clone())),
            },
            None => Err(MTTError::NameInvalidID(id.clone())),
        }
    }

    fn get_id(&self, name: &Name) -> Result<&Uuid, MTTError> {
        match self.names.get(name) {
            Some(id) => Ok(id),
            None => Err(MTTError::NameNotFound(name.clone())),
        }
    }
}

#[cfg(test)]
mod names {
    use super::*;

    #[test]
    fn are_name_ids_unique() {
        let mut names = Names::new();
        let data = ["one", "two", "three", "four", "five"];
        let mut ids: HashSet<Uuid> = HashSet::new();
        for item in data.iter() {
            let name = Name::english(item.to_string());
            ids.insert(names.add_name(name).unwrap());
        }
        assert_eq!(ids.len(), data.len());
    }

    #[test]
    fn does_id_return_name() {
        let mut names = Names::new();
        let data = ["one", "two"];
        let mut ids: HashMap<Name, Uuid> = HashMap::new();
        for item in data.iter() {
            let name = Name::english(item.to_string());
            ids.insert(name.clone(), names.add_name(name).unwrap());
        }
        for (name, id) in ids.iter() {
            assert_eq!(
                &names
                    .get_name(id, &Language::from_639_1("en").unwrap())
                    .unwrap(),
                name
            );
            assert_eq!(names.get_id(name).unwrap(), id);
        }
    }

    #[test]
    fn errors_on_name_not_found() {
        let mut names = Names::new();
        let name = Name::english("missing".to_string());
        let result = names.get_id(&name);
        match result {
            Ok(_) => unreachable!("got {:?}, should have been error", result),
            Err(err) => match err {
                MTTError::NameNotFound(output) => assert_eq!(output, name),
                _ => unreachable!("got {:?}, should have been name not found", err),
            },
        }
    }

    #[test]
    fn errors_on_bad_id() {
        let mut names = Names::new();
        let id = Uuid::new_v4();
        let result = names.get_name(&id, &Language::from_639_1("en").unwrap());
        match result {
            Ok(_) => unreachable!("got {:?}, should be invalid id error", result),
            Err(err) => match err {
                MTTError::NameInvalidID(data) => assert_eq!(data, id),
                _ => unreachable!("got {:?}, should have been invalid id", err),
            },
        }
    }

    #[test]
    fn errors_on_missing_translation() {
        let mut names = Names::new();
        let name = Name::english("task".to_string());
        let lang = Language::from_639_1("ja").unwrap();
        let id = names.add_name(name).unwrap();
        let result = names.get_name(&id, &lang);
        match result {
            Ok(_) => unreachable!("got {:?}, should be invalid id error", result),
            Err(err) => match err {
                MTTError::NameMissingTranslation(data) => assert_eq!(data, lang),
                _ => unreachable!("got {:?}, should have been invalid id", err),
            },
        }
    }

    #[test]
    fn errors_on_duplicate_names() {
        let mut names = Names::new();
        let data = "test".to_string();
        let name = Name::english(data.clone());
        let id = names.add_name(name.clone());
        let output = names.add_name(name.clone());
        match output {
            Ok(_) => unreachable!(
                "got {:?}, should have produced duplicate name error",
                output
            ),
            Err(err) => match err {
                MTTError::NameDuplicate(result) => assert_eq!(result, name),
                _ => unreachable!("got {:?}, should have been duplicate name", err),
            },
        }
    }

    #[test]
    fn allows_alternate_names() {
        let mut names = Names::new();
        let data = "test".to_string();
        let alt = "テスト".to_string();
        let english = Name::english(data.clone());
        let japanese = Name::japanese(alt.clone());
        let id = names.add_name(english.clone()).unwrap();
        let result = names.add_translation(english, japanese.clone()).unwrap();
        assert_eq!(result, id);
        println!("\n{:?}", names);
        let output = names.get_name(&id, &Language::from_639_1("ja").unwrap());
        assert_eq!(output.unwrap().to_string(), alt);
        assert_eq!(names.get_id(&japanese).unwrap(), &id);
    }

    #[test]
    fn errors_on_bad_translation() {
        let mut names = Names::new();
        let data = "test".to_string();
        let alt = "テスト".to_string();
        let english = Name::english(data.clone());
        let japanese = Name::japanese(alt.clone());
        let result = names.add_translation(japanese.clone(), english);
        match result {
            Ok(_) => unreachable!("got {:?}, should be invalid id error", result),
            Err(err) => match err {
                MTTError::NameNotFound(output) => assert_eq!(output, japanese),
                _ => unreachable!("got {:?}, should have been invalid id", err),
            },
        }
    }

    #[test]
    fn errors_on_translation_duplicates() {
        let mut names = Names::new();
        let data = "test".to_string();
        let alt = "テスト".to_string();
        let english = Name::english(data.clone());
        let japanese = Name::japanese(alt.clone());
        let id = names.add_name(english.clone()).unwrap();
        let id = names.add_name(japanese.clone()).unwrap();
        let result = names.add_translation(english, japanese.clone());
        match result {
            Ok(_) => unreachable!(
                "got {:?}, should have produced duplicate name error",
                result
            ),
            Err(err) => match err {
                MTTError::NameDuplicate(result) => assert_eq!(result, japanese),
                _ => unreachable!("got {:?}, should have been duplicate name", err),
            },
        }
    }
}

#[derive(Clone, Debug)]
enum RegMsg {
    AddRoute(RouteRequest),
    DocName(Name),
    Error(MTTError),
    Ok,
}

#[derive(Clone, Debug)]
struct Register {
    msg: RegMsg,
    sender_id: Uuid,
}

impl Register {
    fn new(sender_id: Uuid, reg_msg: RegMsg) -> Self {
        Self {
            msg: reg_msg,
            sender_id: sender_id,
        }
    }

    fn get_msg(&self) -> &RegMsg {
        &self.msg
    }

    fn get_sender_id(&self) -> &Uuid {
        &self.sender_id
    }

    fn response(&self, reg_msg: RegMsg) -> Self {
        Self {
            msg: reg_msg,
            sender_id: self.sender_id.clone(),
        }
    }
}

#[derive(Clone, Debug, PartialEq)]
struct Route {
    action: Include<Action>,
    doc_type: Include<Uuid>,
    msg_id: Include<Uuid>,
}

impl Route {
    fn new(msg_id: Include<Uuid>, doc: Include<Uuid>, action: Include<Action>) -> Self {
        Self {
            action: action,
            doc_type: doc,
            msg_id: msg_id,
        }
    }
}

impl From<RouteID> for Route {
    fn from(value: RouteID) -> Self {
        Self {
            action: match value.action {
                Some(data) => Include::Some(data.clone()),
                None => Include::All,
            },
            doc_type: match value.doc_type {
                Some(doc) => Include::Some(doc.clone()),
                None => Include::All,
            },
            msg_id: match value.msg_id {
                Some(msg) => Include::Some(msg.clone()),
                None => Include::All,
            },
        }
    }
}

impl From<&RouteID> for Route {
    fn from(value: &RouteID) -> Self {
        Self {
            action: match &value.action {
                Some(data) => Include::Some(data.clone()),
                None => Include::All,
            },
            doc_type: match &value.doc_type {
                Some(doc) => Include::Some(doc.clone()),
                None => Include::All,
            },
            msg_id: match &value.msg_id {
                Some(msg) => Include::Some(msg.clone()),
                None => Include::All,
            },
        }
    }
}

#[cfg(test)]
mod routes {
    use super::*;

    #[test]
    fn can_a_route_set_action() {
        let actions = [Action::Query, Action::Reply];
        for action in actions.into_iter() {
            let route = Route::new(Include::All, Include::All, Include::Some(action.clone()));
            match route.msg_id {
                Include::All => {}
                Include::Some(_) => unreachable!("should have been all"),
            }
            match route.doc_type {
                Include::All => {}
                Include::Some(_) => unreachable!("should have been all"),
            }
            match route.action {
                Include::All => unreachable!("should be a specific value"),
                Include::Some(result) => assert_eq!(result, action),
            }
        }
    }

    #[test]
    fn can_route_set_document_by_name() {
        let doc_id = Uuid::new_v4();
        let route = Route::new(Include::All, Include::Some(doc_id.clone()), Include::All);
        match route.msg_id {
            Include::All => {}
            Include::Some(_) => unreachable!("should have been all"),
        }
        match route.doc_type {
            Include::All => unreachable!("should be a specific value"),
            Include::Some(result) => assert_eq!(result, doc_id),
        }
        match route.action {
            Include::All => {}
            Include::Some(_) => unreachable!("should have been all"),
        }
    }

    #[test]
    fn can_route_set_document_by_id() {
        let id = Uuid::new_v4();
        let route = Route::new(Include::All, Include::Some(id.clone()), Include::All);
        match route.msg_id {
            Include::All => {}
            Include::Some(_) => unreachable!("should have been all"),
        }
        match route.doc_type {
            Include::All => unreachable!("should be a specific value"),
            Include::Some(result) => assert_eq!(result, id),
        }
        match route.action {
            Include::All => {}
            Include::Some(_) => unreachable!("should have been all"),
        }
    }

    #[test]
    fn can_route_be_set_by_message_id() {
        let id = Uuid::new_v4();
        let route = Route::new(Include::Some(id.clone()), Include::All, Include::All);
        match route.msg_id {
            Include::All => unreachable!("should be a specific value"),
            Include::Some(result) => assert_eq!(result, id),
        }
        match route.doc_type {
            Include::All => {}
            Include::Some(_) => unreachable!("should have been all"),
        }
        match route.action {
            Include::All => {}
            Include::Some(_) => unreachable!("should have been all"),
        }
    }
}

#[derive(Clone, Debug, Eq, Hash, PartialEq)]
struct RouteRequest {
    msg_id: Include<Uuid>,
    doc_name: Include<String>,
    action: Include<Action>,
}

impl RouteRequest {
    fn new(msg_id: Include<Uuid>, doc_name: Include<String>, action: Include<Action>) -> Self {
        Self {
            msg_id: msg_id,
            doc_name: doc_name,
            action: action,
        }
    }
}

struct QueueData {
    senders: HashMap<Uuid, Sender<Message>>,
    names: HashMap<String, Uuid>,
    routes: HashMap<RouteID, Vec<Uuid>>,
}

impl QueueData {
    fn new() -> Self {
        Self {
            senders: HashMap::new(),
            names: HashMap::new(),
            routes: HashMap::new(),
        }
    }

    fn get_doc_id<N>(&self, nameid: N) -> Result<Uuid, MTTError>
    where
        N: Into<NameID>,
    {
        let sender_id = match nameid.into() {
            NameID::Name(name) => match self.names.get(&name) {
                Some(id) => id.clone(),
                None => return Err(MTTError::DocumentNotFound(name.clone())),
            },
            NameID::ID(id) => id.clone(),
            NameID::None => unreachable!("should never be none"),
        };
        if self.senders.contains_key(&sender_id) {
            Ok(sender_id)
        } else {
            Err(MTTError::DocumentNotFound(sender_id.to_string()))
        }
    }

    fn register(
        &mut self,
        tx: Sender<Message>,
        name: String,
        routes: Vec<RouteRequest>,
    ) -> Result<(), MTTError> {
        let mut id = Uuid::new_v4();
        while self.senders.contains_key(&id) {
            id = Uuid::new_v4();
        }
        match self.get_doc_id(name.clone()) {
            Ok(_) => return Err(MTTError::DocumentAlreadyExists(name)),
            Err(_) => {}
        }
        let mut holder: HashMap<RouteID, Vec<Uuid>> = HashMap::new();
        for route in routes.iter() {
            let doc_type = match &route.doc_name {
                Include::Some(doc_name) => {
                    if doc_name == &name {
                        Include::Some(id.clone())
                    } else {
                        match self.get_doc_id(doc_name.to_string()) {
                            Ok(doc_id) => Include::Some(doc_id),
                            Err(err) => return Err(err),
                        }
                    }
                }
                Include::All => Include::All,
            };
            let route_id: RouteID =
                Route::new(route.msg_id.clone(), doc_type, route.action.clone()).into();
            match self.routes.get(&route_id) {
                Some(senders) => {
                    let mut addition = senders.clone();
                    addition.push(id.clone());
                    holder.insert(route_id, addition);
                }
                None => {
                    let senders = [id.clone()].to_vec();
                    holder.insert(route_id, senders);
                }
            }
        }
        self.senders.insert(id.clone(), tx);
        self.names.insert(name.clone(), id.clone());
        for (route_id, senders) in holder.iter() {
            self.routes.insert(route_id.clone(), senders.clone());
        }
        Ok(())
    }

    fn send(&self, msg: Message) -> Result<(), MTTError> {
        let doc_id: Include<Uuid> = match self.get_doc_id(msg.get_document_id()) {
            Ok(id) => Include::Some(id.clone()),
            Err(err) => {
                let action: Action = msg.get_action().into();
                if action == Action::Create {
                    Include::Some(Uuid::nil())
                } else {
                    return Err(err);
                }
            }
        };
        let route = Route::new(
            Include::Some(msg.get_message_id().clone()),
            doc_id,
            Include::Some(msg.get_action().into()),
        );
        for (send_route, send_ids) in self.routes.iter() {
            if route == send_route.into() {
                for send_id in send_ids {
                    let tx = self.senders.get(&send_id).unwrap();
                    tx.send(msg.clone()).unwrap();
                }
            }
        }
        Ok(())
    }
}

#[cfg(test)]
mod queuedatas {
    use super::support_test::TIMEOUT;
    use super::*;
    use std::sync::mpsc::RecvTimeoutError;

    #[test]
    fn can_document_be_registered() {
        let mut queuedata = QueueData::new();
        let (tx, rx) = channel();
        let name = Uuid::new_v4().to_string();
        let routes = [
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Query),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Reply),
            ),
        ]
        .to_vec();
        queuedata.register(tx, name.clone(), routes).unwrap();
        let msg1 = Message::new(name.clone(), MsgAction::Query(Query::new()));
        let msg2 = Message::new(name.clone(), MsgAction::Reply(Reply::new()));
        let msg3 = Message::new(name.clone(), MsgAction::Create(DocDef::new()));
        queuedata.send(msg1.clone()).unwrap();
        queuedata.send(msg2.clone()).unwrap();
        queuedata.send(msg3.clone()).unwrap();
        let result1 = rx.recv_timeout(TIMEOUT).unwrap();
        let result2 = rx.recv_timeout(TIMEOUT).unwrap();
        match rx.recv_timeout(TIMEOUT) {
            Ok(_) => unreachable!("should have timed out"),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
        assert_eq!(result1.get_message_id(), msg1.get_message_id());
        assert_eq!(result2.get_message_id(), msg2.get_message_id());
        match result1.get_action() {
            MsgAction::Query(_) => {}
            _ => unreachable!("should have been a query"),
        }
        match result2.get_action() {
            MsgAction::Reply(_) => {}
            _ => unreachable!("should have been a query"),
        }
    }

    #[test]
    fn does_register_fail_on_duplicate_documents() {
        let mut queuedata = QueueData::new();
        let (tx1, _) = channel();
        let (tx2, _) = channel();
        let name = Uuid::new_v4().to_string();
        queuedata
            .register(tx1, name.to_string(), Vec::new())
            .unwrap();
        match queuedata.register(tx2, name.to_string(), Vec::new()) {
            Ok(_) => unreachable!("duplicates should create an error"),
            Err(err) => match err {
                MTTError::DocumentAlreadyExists(result) => assert_eq!(result, name),
                _ => unreachable!("should have been document does not exists"),
            },
        }
    }

    #[test]
    fn does_bad_route_prevent_registration() {
        let mut queuedata = QueueData::new();
        let (tx, rx) = channel();
        let good = "good";
        let bad = Uuid::new_v4().to_string();
        let routes = [
            RouteRequest::new(
                Include::All,
                Include::Some(good.to_string()),
                Include::Some(Action::Query),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(bad.clone()),
                Include::Some(Action::Reply),
            ),
        ]
        .to_vec();
        match queuedata.register(tx, good.to_string(), routes) {
            Ok(_) => unreachable!("should produce an error"),
            Err(err) => match err {
                MTTError::DocumentNotFound(result) => assert_eq!(result, bad),
                _ => unreachable!("Shouuld be document not found"),
            },
        }
        assert_eq!(queuedata.senders.len(), 0, "should not add to senders");
        assert_eq!(queuedata.names.len(), 0, "should not add to names");
        assert_eq!(queuedata.routes.len(), 0, "should nor add to routes");
    }

    #[test]
    fn is_sender_only_added_once_to_routes() {
        let mut queuedata = QueueData::new();
        let (tx, rx) = channel();
        let name = "project";
        let routes = [
            RouteRequest::new(
                Include::All,
                Include::Some(name.to_string()),
                Include::Some(Action::Query),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.to_string()),
                Include::Some(Action::Query),
            ),
        ]
        .to_vec();
        queuedata.register(tx, name.to_string(), routes).unwrap();
        for senders in queuedata.routes.values() {
            assert_eq!(senders.len(), 1, "should be no double entries");
        }
    }

    #[test]
    fn does_a_bad_document_name_fail() {
        let docname = Uuid::new_v4().to_string();
        let queuedata = QueueData::new();
        let msg = Message::new(docname.clone(), MsgAction::Query(Query::new()));
        match queuedata.send(msg) {
            Ok(_) => unreachable!("should have been an error"),
            Err(data) => match data {
                MTTError::DocumentNotFound(doc) => assert_eq!(doc, docname),
                _ => unreachable!("should have been a not found error"),
            },
        }
    }

    #[test]
    fn is_send_okay_if_no_one_is_listening() {
        let mut queuedata = QueueData::new();
        let name = "something";
        let (tx, _) = channel();
        queuedata
            .register(tx, name.to_string(), Vec::new())
            .unwrap();
        let msg = Message::new("something", MsgAction::Create(DocDef::new()));
        match queuedata.send(msg) {
            Ok(_) => {}
            Err(err) => unreachable!("got {:?}: should not error", err),
        }
    }

    #[test]
    fn can_more_than_one_document_respond() {
        let mut queuedata = QueueData::new();
        let name1 = "task";
        let name2 = "work";
        let action = MsgAction::Query(Query::new());
        let (tx1, rx1) = channel();
        let (tx2, rx2) = channel();
        let routes = [RouteRequest::new(
            Include::All,
            Include::Some(name1.to_string()),
            Include::All,
        )]
        .to_vec();
        queuedata
            .register(tx1, name1.to_string(), routes.clone())
            .unwrap();
        queuedata
            .register(tx2, name2.to_string(), routes.clone())
            .unwrap();
        let msg = Message::new(name1, action.clone());
        queuedata.send(msg.clone()).unwrap();
        let result1 = rx1.recv_timeout(TIMEOUT).unwrap();
        let result2 = rx2.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result1.get_message_id(), msg.get_message_id());
        assert_eq!(result1.get_message_id(), result2.get_message_id());
    }
}

struct DocRegistry {
    doc_names: Vec<Name>,
    queue: Queue,
    receiver: Receiver<Message>,
    routes: HashMap<RouteRequest, Uuid>,
}

impl DocRegistry {
    fn new(queue: Queue, rx: Receiver<Message>) -> Self {
        Self {
            doc_names: Vec::new(),
            queue: queue,
            receiver: rx,
            routes: HashMap::new(),
        }
    }

    fn start(queue: Queue, rx: Receiver<Message>) {
        let mut doc_names = DocRegistry::new(queue, rx);
        spawn(move || {
            doc_names.listen();
        });
    }

    fn listen(&mut self) {
        loop {
            let msg = self.receiver.recv().unwrap();
            match msg.get_action() {
                MsgAction::Register(data) => {
                    let id = data.get_sender_id();
                    let reply = msg.response(self.register_action(data));
                    self.queue.forward(id, reply);
                }
                _ => {}
            }
        }
    }

    fn register_action(&mut self, reg: &Register) -> Register {
        match reg.get_msg() {
            RegMsg::DocName(name) => {
                if self.doc_names.contains(name) {
                    reg.response(RegMsg::Error(MTTError::DocumentAlreadyExists(
                        name.to_string(),
                    )))
                } else {
                    self.doc_names.push(name.clone());
                    reg.response(RegMsg::Ok)
                }
            }
            RegMsg::AddRoute(route) => {
                self.routes
                    .insert(route.clone(), reg.get_sender_id().clone());
                reg.response(RegMsg::Ok)
            }
            _ => reg.response(RegMsg::Ok),
        }
    }
}

struct Router {
    doc_registry: Sender<Message>,
    senders: HashMap<Uuid, Sender<Message>>,
}

impl Router {
    fn new(tx: Sender<Message>) -> Self {
        Self {
            doc_registry: tx,
            senders: HashMap::new(),
        }
    }

    fn add_sender(&mut self, sender: Sender<Message>) -> Uuid {
        let mut id = Uuid::new_v4();
        while self.senders.contains_key(&id) {
            id = Uuid::new_v4();
        }
        self.senders.insert(id.clone(), sender);
        id
    }

    fn forward(&self, id: &Uuid, msg: Message) {
        self.senders.get(id).unwrap().send(msg).unwrap();
    }

    fn send(&self, msg: Message) {
        self.doc_registry.send(msg).unwrap();
    }
}

#[cfg(test)]
mod routers {
    use super::{support_test::TIMEOUT, *};

    #[test]
    fn can_pass_message() {
        let (tx, rx) = channel();
        let router = Router::new(tx);
        let msg = Message::new("task", Query::new());
        router.send(msg.clone());
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
    }

    #[test]
    fn can_forward_message() {
        let (tx, _) = channel();
        let mut router = Router::new(tx);
        let (sender, receiver) = channel();
        let id = router.add_sender(sender);
        let msg = Message::new("wiki", Query::new());
        router.forward(&id, msg.clone());
        let result = receiver.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
    }

    #[test]
    fn sender_ids_are_unique() {
        let (tx, _) = channel();
        let mut router = Router::new(tx);
        let count = 10;
        let mut holder: HashSet<Uuid> = HashSet::new();
        for _ in 0..count {
            let (tx, _) = channel();
            holder.insert(router.add_sender(tx));
        }
        assert_eq!(holder.len(), count, "had duplicate keys");
    }
}

#[derive(Clone)]
struct Queue {
    router: Arc<RwLock<Router>>,
    //
    //
    //
    queue_data: Arc<RwLock<QueueData>>,
}

impl Queue {
    fn new() -> Self {
        let (tx, rx) = channel();
        let output = Self {
            router: Arc::new(RwLock::new(Router::new(tx))),
            //
            //
            //
            queue_data: Arc::new(RwLock::new(QueueData::new())),
        };
        DocRegistry::start(output.clone(), rx);
        output
    }

    fn add_sender(&mut self, sender: Sender<Message>) -> Uuid {
        let mut router = self.router.write().unwrap();
        router.add_sender(sender)
    }

    fn forward(&self, id: &Uuid, msg: Message) {
        let router = self.router.read().unwrap();
        router.forward(id, msg);
    }

    fn send(&self, msg: Message) -> Result<(), MTTError> {
        let router = self.router.read().unwrap();
        router.send(msg.clone());
        //
        //
        //
        if msg.get_document_id().is_none() {
            Ok(())
        } else {
            let queuedata = self.queue_data.read().unwrap();
            queuedata.send(msg)
        }
    }

    //
    //
    //

    fn register(
        &mut self,
        tx: Sender<Message>,
        name: String,
        routes: Vec<RouteRequest>,
    ) -> Result<(), MTTError> {
        let mut queuedata = self.queue_data.write().unwrap();
        queuedata.register(tx, name, routes)
    }
}

#[cfg(test)]
mod queues {
    use super::{support_test::TIMEOUT, *};
    use std::sync::mpsc::RecvTimeoutError;

    struct TestQueue {
        sender_id: Uuid,
        queue: Queue,
        receiver: Receiver<Message>,
        doc_id: HashMap<String, Uuid>,
        doc_rx: HashMap<String, Receiver<Message>>,
    }

    impl TestQueue {
        fn new() -> Self {
            let mut queue = Queue::new();
            let (tx, rx) = channel();
            let id = queue.add_sender(tx);
            Self {
                sender_id: id,
                queue: queue,
                receiver: rx,
                doc_id: HashMap::new(),
                doc_rx: HashMap::new(),
            }
        }

        fn add_document(&mut self, name: String) {
            let (tx, rx) = channel();
            let id = self.add_sender(tx);
            let reg_msg = Register::new(id.clone(), RegMsg::DocName(Name::english(name.clone())));
            let msg = Message::new(NameID::None, reg_msg);
            self.send(msg.clone()).unwrap();
            let result = rx.recv_timeout(TIMEOUT).unwrap();
            self.doc_id.insert(name.clone(), id);
            self.doc_rx.insert(name.clone(), rx);
        }

        fn get_preset_id(&self) -> &Uuid {
            &self.sender_id
        }

        fn get_preset_rx(&self) -> &Receiver<Message> {
            &self.receiver
        }

        fn get_doc_rx_id(&self, name: &str) -> &Uuid {
            self.doc_id.get(name).unwrap()
        }

        fn get_doc_rx(&self, name: &str) -> &Receiver<Message> {
            self.doc_rx.get(name).unwrap()
        }

        fn add_sender(&mut self, sender: Sender<Message>) -> Uuid {
            self.queue.add_sender(sender)
        }

        fn forward(&self, id: &Uuid, msg: Message) {
            self.queue.forward(id, msg);
        }

        fn send(&self, msg: Message) -> Result<(), MTTError> {
            self.queue.send(msg)
        }
    }

    #[test]
    fn can_forward_message() {
        let mut queue = TestQueue::new();
        let msg = Message::new("wiki", Query::new());
        queue.forward(queue.get_preset_id(), msg.clone());
        let result = queue.get_preset_rx().recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
    }

    #[test]
    fn sender_ids_are_unique() {
        let mut queue = Queue::new();
        let count = 10;
        let mut holder: HashSet<Uuid> = HashSet::new();
        for _ in 0..count {
            let (tx, _) = channel();
            holder.insert(queue.add_sender(tx));
        }
        assert_eq!(holder.len(), count, "had duplicate keys");
    }

    #[test]
    fn can_register_document_name() {
        let mut queue = TestQueue::new();
        let doc_name = Name::english(Uuid::new_v4().to_string());
        let reg_msg = Register::new(
            queue.get_preset_id().clone(),
            RegMsg::DocName(doc_name.clone()),
        );
        let msg = Message::new(NameID::None, reg_msg);
        queue.send(msg.clone()).unwrap();
        let result = queue.get_preset_rx().recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
        let action = result.get_action();
        match action {
            MsgAction::Register(data) => match data.get_msg() {
                RegMsg::Ok => {}
                _ => unreachable!("got {:?}, should have been register ok", action),
            },
            _ => unreachable!("got {:?}, should have been register ok", action),
        }
    }

    #[test]
    fn errors_on_duplicate_names() {
        let mut queue = TestQueue::new();
        let receiver = queue.get_preset_rx();
        let doc_name = Name::english(Uuid::new_v4().to_string());
        let reg_msg = Register::new(
            queue.get_preset_id().clone(),
            RegMsg::DocName(doc_name.clone()),
        );
        let msg = Message::new(NameID::None, reg_msg.clone());
        queue.send(msg.clone()).unwrap();
        receiver.recv_timeout(TIMEOUT).unwrap();
        let msg2 = Message::new(NameID::None, reg_msg.clone());
        queue.send(msg.clone()).unwrap();
        let result = receiver.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
        let action = result.get_action();
        match action {
            MsgAction::Register(data) => match data.get_msg() {
                RegMsg::Error(err) => match err {
                    MTTError::DocumentAlreadyExists(name) => {
                        assert_eq!(name.to_string(), doc_name.to_string())
                    }
                    _ => unreachable!("got {:?}, should have been duplicate error", err),
                },
                _ => unreachable!("got {:?}, should have been error", data),
            },
            _ => unreachable!("got {:?}, should have been register ok", action),
        }
    }

    #[test]
    #[ignore]
    fn can_register_routes() {
        let mut queue = TestQueue::new();
        let names = ["task", "recipe"];
        for name in names.iter() {
            queue.add_document(name.to_string());
        }
        let route_req = RouteRequest::new(Include::All, Include::All, Include::All);
        let reg_msg = RegMsg::AddRoute(route_req);
        let reg = Register::new(queue.get_doc_rx_id(names[0]).clone(), reg_msg);
        let msg = Message::new(NameID::None, reg);
        queue.send(msg).unwrap();
        queue.get_doc_rx(names[0]).recv_timeout(TIMEOUT).unwrap();
        let msg = Message::new(NameID::None, Query::new());
        queue.send(msg.clone()).unwrap();
        let result = queue.get_doc_rx(names[0]).recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
        match queue.get_doc_rx(names[1]).recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }
}

struct CreateDoc {
    queue: Queue,
    rx: Receiver<Message>,
}

impl CreateDoc {
    fn new(queue: Queue, rx: Receiver<Message>) -> Self {
        Self {
            queue: queue,
            rx: rx,
        }
    }

    fn start(mut queue: Queue) {
        let (tx, rx) = channel();
        let routes = [RouteRequest::new(
            Include::All,
            Include::All,
            Include::Some(Action::Create),
        )]
        .to_vec();
        let id = queue.register(tx, "document".to_string(), routes).unwrap();
        let doc = CreateDoc::new(queue, rx);
        spawn(move || {
            doc.listen();
        });
    }

    fn listen(&self) {
        loop {
            let msg = self.rx.recv().unwrap();
            DocumentFile::start(self.queue.clone(), msg);
        }
    }
}

#[derive(Clone, Debug, PartialEq)]
enum FieldType {
    Boolean,
    DateTime,
    Duration,
    Integer,
    None,
    StaticString,
    Uuid,
}

impl FieldType {
    fn get_default(&self) -> Field {
        match self {
            FieldType::Boolean => false.into(),
            FieldType::DateTime => Utc::now().into(),
            FieldType::Duration => Duration::from_secs(0).into(),
            FieldType::Integer => 0.into(),
            FieldType::None => Field::None,
            FieldType::StaticString => "".into(),
            FieldType::Uuid => Uuid::new_v4().into(),
        }
    }
}

impl From<&Field> for FieldType {
    fn from(value: &Field) -> Self {
        match value {
            Field::Boolean(_) => Self::Boolean,
            Field::DateTime(_) => Self::DateTime,
            Field::Duration(_) => Self::Duration,
            Field::Integer(_) => Self::Integer,
            Field::None => Self::None,
            Field::StaticString(_) => Self::StaticString,
            Field::Uuid(_) => Self::Uuid,
        }
    }
}

#[cfg(test)]
mod fieldtypes {
    use super::*;

    #[test]
    fn can_get_defaults_for_uuid() {
        let ftype = FieldType::Uuid;
        let mut ids: Vec<Uuid> = Vec::new();
        for _ in 0..5 {
            let result = ftype.get_default();
            match result {
                Field::Uuid(data) => {
                    assert!(
                        !ids.contains(&data),
                        "found duplicate id {:?} in {:?}",
                        data,
                        ids
                    );
                    ids.push(data.clone());
                }
                _ => unreachable!("got {:?}: should have been uuid", result),
            }
        }
    }

    #[test]
    fn can_get_defaults_for_static_string() {
        let ftype = FieldType::StaticString;
        let result = ftype.get_default();
        match result {
            Field::StaticString(data) => assert_eq!(data, ""),
            _ => unreachable!("got {:?}: should have been static string", result),
        }
    }
}

#[derive(Clone, Debug, Eq, Hash, PartialEq)]
enum Field {
    Boolean(bool),
    DateTime(DateTime<Utc>),
    Duration(Duration),
    Integer(i128),
    None,
    StaticString(String),
    Uuid(Uuid),
}

impl Field {
    fn get_type(&self) -> FieldType {
        self.into()
    }
}

impl From<bool> for Field {
    fn from(value: bool) -> Self {
        Self::Boolean(value)
    }
}

impl From<DateTime<Utc>> for Field {
    fn from(value: DateTime<Utc>) -> Self {
        Self::DateTime(value)
    }
}

impl From<Duration> for Field {
    fn from(value: Duration) -> Self {
        Self::Duration(value)
    }
}

impl From<String> for Field {
    fn from(value: String) -> Self {
        Self::StaticString(value)
    }
}

impl From<&str> for Field {
    fn from(value: &str) -> Self {
        Self::from(value.to_string())
    }
}

impl From<Uuid> for Field {
    fn from(value: Uuid) -> Self {
        Self::Uuid(value)
    }
}

impl From<i128> for Field {
    fn from(value: i128) -> Self {
        Self::Integer(value)
    }
}

#[cfg(test)]
mod fields {
    use super::*;

    #[test]
    fn can_create_static_string() {
        let data = Uuid::new_v4().to_string();
        let result: Field = data.clone().into();
        match result.clone() {
            Field::StaticString(output) => assert_eq!(output, data),
            _ => unreachable!("got {:?}: should have been static string", result),
        }
        assert_eq!(result.get_type(), FieldType::StaticString);
    }

    #[test]
    fn can_create_from_str() {
        let holder = ["one", "two"];
        for data in holder.into_iter() {
            let result: Field = data.into();
            match result.clone() {
                Field::StaticString(output) => assert_eq!(output, data),
                _ => unreachable!("got {:?}: should have been static string", result),
            }
            assert_eq!(result.get_type(), FieldType::StaticString);
        }
    }

    #[test]
    fn create_from_uuid() {
        let data = Uuid::new_v4();
        let result: Field = data.clone().into();
        match result.clone() {
            Field::Uuid(output) => assert_eq!(output, data),
            _ => unreachable!("got {:?}: should have been uuid", result),
        }
        assert_eq!(result.get_type(), FieldType::Uuid);
    }

    #[test]
    fn create_from_datatime() {
        let data = Utc::now();
        let result: Field = data.into();
        match result.clone() {
            Field::DateTime(output) => assert_eq!(output, data),
            _ => unreachable!("got {:?}: should have been uuid", result),
        }
        assert_eq!(result.get_type(), FieldType::DateTime);
    }
}

#[derive(Clone, Debug)]
struct FieldSetting {
    fieldtype: FieldType,
    default_value: Option<Calculation>,
}

impl FieldSetting {
    fn new(ftype: FieldType) -> Self {
        Self {
            fieldtype: ftype,
            default_value: None,
        }
    }

    fn set_default(&mut self, value: Calculation) -> Result<(), MTTError> {
        let data = value.calculate();
        match self.validate(Some(data)) {
            Ok(_) => {}
            Err(err) => return Err(err),
        }
        self.default_value = Some(value);
        Ok(())
    }

    fn validate(&self, value: Option<Field>) -> Result<Field, MTTError> {
        match value {
            Some(data) => {
                let vft: FieldType = (&data).into();
                if vft != self.fieldtype {
                    return Err(MTTError::DocumentFieldWrongDataType(
                        self.fieldtype.clone(),
                        vft,
                    ));
                }
                Ok(data.clone())
            }
            None => match &self.default_value {
                Some(calc) => Ok(calc.calculate()),
                None => Err(MTTError::DocumentFieldMissing("".to_string())),
            },
        }
    }
}

#[cfg(test)]
mod fieldsettings {
    use super::*;

    #[test]
    fn validates_field_type() {
        let fset = FieldSetting::new(FieldType::Uuid);
        let value: Field = Uuid::new_v4().into();
        match fset.validate(Some(value.clone())) {
            Ok(data) => assert_eq!(data, value),
            Err(err) => unreachable!("got {:?}: should have gotten a value", err),
        }
    }

    #[test]
    fn validates_for_bad_field_type() {
        let fset = FieldSetting::new(FieldType::Uuid);
        let value: Field = "text".into();
        match fset.validate(Some(value)) {
            Ok(data) => unreachable!("got {:?}: should have gotten an error", data),
            Err(err) => match err {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(expected, FieldType::Uuid);
                    assert_eq!(got, FieldType::StaticString);
                }
                _ => unreachable!("got {:?}: should have gotten a value", err),
            },
        }
    }

    #[test]
    fn no_default_returns_error() {
        let fset = FieldSetting::new(FieldType::Uuid);
        match fset.validate(None) {
            Ok(data) => unreachable!("got {:?}: should have gotten an error", data),
            Err(err) => match err {
                MTTError::DocumentFieldMissing(data) => assert_eq!(data, ""),
                _ => unreachable!("got {:?}: should have gotten a value", err),
            },
        }
    }

    #[test]
    fn returns_value_if_default_is_set() {
        let mut fset = FieldSetting::new(FieldType::StaticString);
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(FieldType::StaticString);
        fset.set_default(calc);
        match fset.validate(None) {
            Ok(data) => assert_eq!(data, "".into()),
            Err(err) => unreachable!("got {:?}: should have gotten a value", err),
        }
    }

    #[test]
    fn returns_default_value() {
        let mut fset = FieldSetting::new(FieldType::StaticString);
        let input = "fred";
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(input);
        fset.set_default(calc);
        match fset.validate(None) {
            Ok(data) => assert_eq!(data, input.into()),
            Err(err) => unreachable!("got {:?}: should have gotten a value", err),
        }
    }

    #[test]
    fn can_default_be_calculated() {
        let mut fset = FieldSetting::new(FieldType::DateTime);
        let duration = Duration::from_secs(3600);
        let mut calc = Calculation::new(Operand::Add);
        calc.add_value(FieldType::DateTime);
        calc.add_value(duration);
        fset.set_default(calc);
        let start = Utc::now() + duration;
        let result = match fset.validate(None).unwrap() {
            Field::DateTime(data) => data,
            _ => unreachable!("should return datetime"),
        };
        let stop = Utc::now() + duration;
        assert!(
            result > start,
            "{:?} should have been greater than {:?}",
            result,
            start
        );
        assert!(
            result < stop,
            "{:?} should have been less than {:?}",
            result,
            stop
        );
    }
}

#[derive(Clone, Debug)]
struct Addition {
    data: Document,
}

impl Addition {
    fn new() -> Self {
        Self {
            data: Document::new(),
        }
    }

    fn add_field<CV>(&mut self, name: String, field: CV)
    where
        CV: Into<CalcValue>,
    {
        self.data.add_field(name, field);
    }

    fn get_field(&self, name: &str) -> Option<Field> {
        self.data.get_field(name)
    }

    fn get_document(&self) -> Document {
        self.data.clone()
    }
}

#[cfg(test)]
mod additions {
    use super::*;

    #[test]
    fn can_add_static_string() {
        let mut add = Addition::new();
        let name = Uuid::new_v4().to_string();
        let data = Uuid::new_v4().to_string();
        add.add_field(name.clone(), data.clone());
        let result = add.get_field(&name).unwrap();
        match result {
            Field::StaticString(result) => assert_eq!(result, data),
            _ => unreachable!("got {:?}: should have received static string", result),
        }
    }

    fn can_add_uuid() {
        let mut add = Addition::new();
        let name = Uuid::new_v4().to_string();
        let data = Uuid::new_v4();
        add.add_field(name.clone(), data.clone());
        let result = add.get_field(&name).unwrap();
        match result {
            Field::Uuid(result) => assert_eq!(result, data),
            _ => unreachable!("got {:?}: should have received uuid", result),
        }
    }

    fn can_get_document() {
        let mut add = Addition::new();
        let name = Uuid::new_v4().to_string();
        let data = Uuid::new_v4();
        add.add_field(name.clone(), data.clone());
        let doc: Document = add.get_document();
        match doc.get_field(&name).unwrap() {
            Field::Uuid(result) => assert_eq!(result, data),
            _ => unreachable!("should have received uuid"),
        }
    }
}

#[derive(Clone, Debug)]
enum IndexType {
    Index,
    Unique,
}

impl IndexType {
    fn create_index(&self) -> Index {
        match self {
            Self::Index => Index::new(),
            Self::Unique => Index::new_unique(),
        }
    }
}

#[derive(Clone, Debug)]
struct DocDef {
    fields: HashMap<String, FieldSetting>,
    indexes: HashMap<String, IndexType>,
}

impl DocDef {
    fn new() -> Self {
        Self {
            fields: HashMap::new(),
            indexes: HashMap::new(),
        }
    }

    fn add_field(&mut self, name: String, ftype: FieldType) {
        self.fields.insert(name, FieldSetting::new(ftype));
    }

    fn get_field(&self, name: &str) -> Result<&FieldSetting, MTTError> {
        match self.fields.get(name) {
            Some(data) => Ok(data),
            None => Err(MTTError::DocumentFieldNotFound(name.to_string())),
        }
    }

    fn get_field_mut(&mut self, field_name: &str) -> Result<&mut FieldSetting, MTTError> {
        match self.fields.get_mut(field_name) {
            Some(data) => Ok(data),
            None => return Err(MTTError::DocumentFieldNotFound(field_name.to_string())),
        }
    }

    fn field_ids(&self) -> HashSet<&String> {
        self.fields.keys().collect::<HashSet<&String>>()
        //self.fields.keys().cloned().collect::<HashSet<String>>()
    }

    fn validate(&self, field_name: &str, value: Option<Field>) -> Result<Field, MTTError> {
        let setting = match self.get_field(field_name) {
            Ok(data) => data,
            Err(err) => return Err(err),
        };
        setting.validate(value)
    }

    fn set_default(&mut self, field_name: &str, value: Calculation) -> Result<(), MTTError> {
        let setting = match self.get_field_mut(field_name) {
            Ok(data) => data,
            Err(err) => return Err(err),
        };
        match setting.set_default(value) {
            Ok(_) => Ok(()),
            Err(err) => Err(err),
        }
    }

    fn add_index(&mut self, field_name: String, index_type: IndexType) -> Result<(), MTTError> {
        let setting = match self.get_field(&field_name) {
            Ok(_) => {}
            Err(err) => return Err(err),
        };
        self.indexes.insert(field_name, index_type);
        Ok(())
    }

    fn create_indexes(&self) -> Indexes {
        Indexes::new(&self.indexes)
    }

    fn iter(&self) -> impl Iterator<Item = (&String, &FieldSetting)> {
        self.fields.iter()
    }
}

#[cfg(test)]
mod docdefs {
    use super::*;

    #[test]
    fn can_field_be_added() {
        let mut docdef = DocDef::new();
        let name = Uuid::new_v4().to_string();
        let field_type = FieldType::Uuid;
        docdef.add_field(name.clone(), field_type.clone());
        let result = docdef.get_field(name.as_str()).unwrap();
        match result.validate(Some(Uuid::new_v4().into())) {
            Ok(_) => {}
            Err(err) => unreachable!("got {:?}: should have been a value", err),
        }
    }

    #[test]
    fn produces_error_for_bad_fields() {
        let docdef = DocDef::new();
        let name = Uuid::new_v4().to_string();
        match docdef.get_field(name.as_str()) {
            Ok(_) => unreachable!("should return non existant field error"),
            Err(err) => match err {
                MTTError::DocumentFieldNotFound(data) => assert_eq!(data, name),
                _ => unreachable!("got {:?}: should have been document field not found", err),
            },
        }
    }

    #[test]
    fn can_multiple_fields_be_added() {
        let mut docdef = DocDef::new();
        let names = ["one", "two", "three"];
        let field_type = FieldType::StaticString;
        for name in names.iter() {
            docdef.add_field(name.to_string(), field_type.clone());
        }
        for name in names.iter() {
            let result = docdef.get_field(name).unwrap();
            match result.validate(Some("".into())) {
                Ok(_) => {}
                Err(err) => unreachable!("got {:?}: should have been a value", err),
            }
        }
    }

    #[test]
    fn can_change_field_default_to_function() {
        let mut docdef = DocDef::new();
        let name = "defaultfunction";
        docdef.add_field(name.to_string(), FieldType::StaticString);
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(FieldType::StaticString);
        docdef.set_default(name, calc);
        match docdef.get_field(name).unwrap().validate(None) {
            Ok(data) => match data {
                Field::StaticString(result) => assert_eq!(result, ""),
                _ => unreachable!("got {:?}: should return a static string", data),
            },
            Err(err) => unreachable!("got {:?}: should return a value", err),
        }
    }

    #[test]
    fn does_set_default_function_error_on_bad_field_name() {
        let mut docdef = DocDef::new();
        let field_name = Uuid::new_v4().to_string();
        let calc = Calculation::new(Operand::Assign);
        match docdef.set_default(field_name.as_str(), calc) {
            Ok(_) => unreachable!("should be an error"),
            Err(err) => match err {
                MTTError::DocumentFieldNotFound(data) => assert_eq!(data, field_name),
                _ => unreachable!("got {:?}: should have been field not found", err),
            },
        }
    }

    #[test]
    fn does_set_default_value_error_on_bad_field_name() {
        let mut docdef = DocDef::new();
        let field_name = Uuid::new_v4().to_string();
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(Uuid::new_v4());
        match docdef.set_default(field_name.as_str(), calc) {
            Ok(_) => unreachable!("should be an error"),
            Err(err) => match err {
                MTTError::DocumentFieldNotFound(data) => assert_eq!(data, field_name),
                _ => unreachable!("got {:?}: should have been field not found", err),
            },
        }
    }

    #[test]
    fn does_set_default_value_error_on_bad_field_type() {
        let mut docdef = DocDef::new();
        let name = "defaultvalue";
        docdef.add_field(name.to_string(), FieldType::Uuid);
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value("fred");
        match docdef.set_default(name, calc) {
            Ok(data) => unreachable!("got {:?}, should be an error", data),
            Err(err) => match err {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(expected, FieldType::Uuid);
                    assert_eq!(got, FieldType::StaticString);
                }
                _ => unreachable!("got {:?}: should have been field not found", err),
            },
        }
    }

    #[test]
    fn returns_field_ids() {
        let count = 5;
        let mut ids: HashSet<String> = HashSet::new();
        while ids.len() < count {
            ids.insert(Uuid::new_v4().to_string());
        }
        let mut docdef = DocDef::new();
        for id in ids.iter() {
            docdef.add_field(id.clone(), FieldType::Uuid);
        }
        let result = docdef.field_ids();
        assert_eq!(result.len(), ids.len());
        for id in result.iter() {
            assert!(ids.contains(id.clone()));
        }
    }
}

#[derive(Clone, Debug)]
enum Operand {
    Add,
    Assign,
    Equal,
}

impl Operand {
    fn validate(&self, x: &Field, y: &Field) -> bool {
        match self {
            Self::Equal => x == y,
            _ => false,
        }
    }
}

#[cfg(test)]
mod operands {
    use super::*;

    #[test]
    fn equals_true() {
        let data: Field = Uuid::new_v4().into();
        assert!(Operand::Equal.validate(&data, &data));
    }

    #[test]
    fn equals_false() {
        let x: Field = Uuid::new_v4().into();
        let mut y: Field = Uuid::new_v4().into();
        while x == y {
            y = Uuid::new_v4().into();
        }
        assert!(!Operand::Equal.validate(&x, &y));
    }
}

#[derive(Clone, Debug)]
enum CalcValue {
    Calculate(Calculation),
    FType(FieldType),
    Value(Field),
}

impl CalcValue {
    fn get(&self) -> Field {
        match self {
            Self::FType(ftype) => ftype.get_default(),
            Self::Value(field) => field.clone(),
            Self::Calculate(calc) => calc.calculate(),
        }
    }
}

impl From<Calculation> for CalcValue {
    fn from(value: Calculation) -> Self {
        Self::Calculate(value)
    }
}

impl From<Field> for CalcValue {
    fn from(value: Field) -> Self {
        Self::Value(value)
    }
}

impl From<FieldType> for CalcValue {
    fn from(value: FieldType) -> Self {
        Self::FType(value)
    }
}

impl From<bool> for CalcValue {
    fn from(value: bool) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

impl From<DateTime<Utc>> for CalcValue {
    fn from(value: DateTime<Utc>) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

impl From<Duration> for CalcValue {
    fn from(value: Duration) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

impl From<i128> for CalcValue {
    fn from(value: i128) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

impl From<&str> for CalcValue {
    fn from(value: &str) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

impl From<String> for CalcValue {
    fn from(value: String) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

impl From<Uuid> for CalcValue {
    fn from(value: Uuid) -> Self {
        let output: Field = value.into();
        Self::from(output).into()
    }
}

#[cfg(test)]
mod calcvalues {
    use super::*;

    #[test]
    fn from_uuid() {
        let value = Uuid::new_v4();
        let expected: Field = value.into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_str() {
        let value = "something";
        let expected: Field = value.into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_string() {
        let value = "data".to_string();
        let expected: Field = value.clone().into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_boolean() {
        let value = true;
        let expected: Field = value.clone().into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_datetime() {
        let value = Utc::now();
        let expected: Field = value.clone().into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_duration() {
        let value = Duration::from_secs(5);
        let expected: Field = value.clone().into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_integer() {
        let value: i128 = 5;
        let expected: Field = value.clone().into();
        let result: CalcValue = value.into();
        match result.clone() {
            CalcValue::Value(data) => assert_eq!(data, expected),
            _ => unreachable!("got {:?}, should have gotten a field", result),
        }
        assert_eq!(result.get(), expected);
    }

    #[test]
    fn from_calculation() {
        let duration = Duration::from_secs(300);
        let start = Utc::now() + duration;
        let mut calc = Calculation::new(Operand::Add);
        calc.add_value(FieldType::DateTime);
        calc.add_value(duration.clone());
        let result: CalcValue = calc.into();
        let data = match result.get() {
            Field::DateTime(data) => data,
            _ => unreachable!(),
        };
        let stop = Utc::now() + duration;
        assert!(
            data > start && data < stop,
            "should be about 5 minutes ahead"
        );
    }
}

#[derive(Clone, Debug)]
struct Calculation {
    operation: Operand,
    values: Vec<CalcValue>,
}

impl Calculation {
    fn new(operand: Operand) -> Self {
        Self {
            operation: operand,
            values: Vec::new(),
        }
    }

    fn operation(&self) -> &Operand {
        &self.operation
    }

    fn get_fields(&self) -> Vec<Field> {
        let mut output = Vec::new();
        for item in self.values.iter() {
            output.push(item.get());
        }
        output
    }

    fn push_value(
        &mut self,
        base: FieldType,
        ftype: FieldType,
        data: CalcValue,
    ) -> Result<(), MTTError> {
        if base == ftype {
            self.values.push(data);
        } else {
            return Err(MTTError::DocumentFieldWrongDataType(base, ftype));
        }
        Ok(())
    }

    fn add_value<CV>(&mut self, data: CV) -> Result<(), MTTError>
    where
        CV: Into<CalcValue>,
    {
        let holder: CalcValue = data.into();
        if self.values.len() == 0 {
            self.values.push(holder);
            Ok(())
        } else {
            let mut base = self.values[0].get().get_type();
            let ftype = holder.get().get_type();
            match self.operation {
                Operand::Add => {
                    if base == FieldType::DateTime {
                        base = FieldType::Duration;
                    }
                    match self.push_value(base, ftype, holder) {
                        Ok(_) => Ok(()),
                        Err(err) => Err(err),
                    }
                }
                _ => match self.push_value(base, ftype, holder) {
                    Ok(_) => Ok(()),
                    Err(err) => Err(err),
                },
            }
        }
    }

    fn calculate(&self) -> Field {
        match self.operation {
            Operand::Add => {
                let values = self.get_fields();
                match values[0].get_type() {
                    FieldType::DateTime => {
                        let mut output = Utc::now();
                        for item in values.iter() {
                            match item {
                                Field::DateTime(datetime) => output = datetime.clone(),
                                Field::Duration(duration) => output += duration.clone(),
                                _ => unreachable!("got {:?}, should have been a duration", item),
                            }
                        }
                        output.into()
                    }
                    FieldType::Integer => {
                        let mut output: i128 = 0;
                        for item in values.iter() {
                            match item {
                                Field::Integer(data) => output += data,
                                _ => unreachable! {"got {:?} expected Integer", item},
                            }
                        }
                        output.into()
                    }
                    _ => unreachable!("{:?} does not handle addition", values[0].get_type()),
                }
            }
            Operand::Assign => self.values[0].get(),
            Operand::Equal => { self.values[0].get() == self.values[1].get() }.into(),
        }
    }
}

#[cfg(test)]
mod calculations {
    use super::*;
    use rand::random;

    #[test]
    fn errors_on_different_field_types() {
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(Uuid::nil()).unwrap();
        match calc.add_value("other") {
            Ok(_) => unreachable!("should have errored with wrong type"),
            Err(err) => match err {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(expected, FieldType::Uuid);
                    assert_eq!(got, FieldType::StaticString);
                }
                _ => unreachable!("got {:?}, expected wrong field type", err),
            },
        }
    }

    #[test]
    fn returns_reference_to_operand() {
        let calc = Calculation::new(Operand::Assign);
        match calc.operation() {
            Operand::Assign => {}
            _ => unreachable!("got {:?}, shold have gotten assign", calc.operation()),
        }
        let calc = Calculation::new(Operand::Equal);
        match calc.operation() {
            Operand::Equal => {}
            _ => unreachable!("got {:?}, shold have gotten assign", calc.operation()),
        }
    }

    #[test]
    fn can_assign_value() {
        let mut calc = Calculation::new(Operand::Assign);
        let data: Field = Uuid::new_v4().into();
        calc.add_value(data.clone());
        let result = calc.calculate();
        assert_eq!(result, data);
    }

    #[test]
    fn can_assign_default_function() {
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(FieldType::Uuid);
        let result1 = calc.calculate();
        let result2 = calc.calculate();
        assert_ne!(result1, result2);
    }

    #[test]
    fn can_equal_true() {
        let mut calc = Calculation::new(Operand::Equal);
        let data: Field = Uuid::new_v4().into();
        calc.add_value(data.clone());
        calc.add_value(data.clone());
        let expected: Field = true.into();
        let result = calc.calculate();
        assert_eq!(result, expected);
    }

    #[test]
    fn can_equal_false() {
        let mut calc = Calculation::new(Operand::Equal);
        let value1: Field = "fred".into();
        let value2: Field = "barney".into();
        calc.add_value(value1);
        calc.add_value(value2);
        let expected: Field = false.into();
        let result = calc.calculate();
        assert_eq!(result, expected);
    }

    #[test]
    fn can_add_numbers() {
        let mut calc = Calculation::new(Operand::Add);
        let value1: i128 = random::<u8>().into();
        let value2: i128 = random::<u8>().into();
        let expected: Field = { value1 + value2 }.into();
        let value1: Field = value1.into();
        let value2: Field = value2.into();
        calc.add_value(value1);
        calc.add_value(value2);
        let result = calc.calculate();
        assert_eq!(result, expected);
    }

    #[test]
    fn returns_error_on_mismatch() {
        let mut calc = Calculation::new(Operand::Add);
        calc.add_value(Uuid::nil());
        match calc.add_value("mismatch") {
            Ok(_) => unreachable!("should have returned an error"),
            Err(err) => match err {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(got, FieldType::StaticString);
                    assert_eq!(expected, FieldType::Uuid);
                }
                _ => unreachable!("got {:?}, expected wrong field type", err),
            },
        }
    }

    #[test]
    fn datetime_accepts_duration() {
        let mut calc = Calculation::new(Operand::Add);
        let duration = Duration::from_secs(3600);
        let start = Utc::now() + duration;
        calc.add_value(FieldType::DateTime).unwrap();
        match calc.add_value(duration.clone()) {
            Ok(_) => {}
            Err(err) => unreachable!("got {:?}, should have returned normally", err),
        }
        let result = calc.calculate();
        let stop = Utc::now() + duration;
        match result {
            Field::DateTime(data) => {
                assert!(data > start);
                assert!(data < stop);
            }
            _ => unreachable!("got {:?}, should have been datetime", result),
        }
    }
}

#[derive(Clone, Debug)]
struct Operation {
    field_name: String,
    operation: Operand,
    value: Field,
}

impl Operation {
    fn new<F>(name: String, op: Operand, value: F) -> Self
    where
        F: Into<Field>,
    {
        Self {
            field_name: name,
            operation: op,
            value: value.into(),
        }
    }

    fn which_field(&self) -> String {
        self.field_name.clone()
    }

    fn validate(&self, field: &Field) -> bool {
        self.operation.validate(field, &self.value)
    }
}

#[derive(Clone, Debug)]
struct Query {
    data: HashMap<String, Calculation>,
}

impl Query {
    fn new() -> Self {
        Self {
            data: HashMap::new(),
        }
    }

    fn add(&mut self, name: String, operation: Calculation) -> Result<(), MTTError> {
        match operation.operation() {
            Operand::Equal => {
                self.data.insert(name, operation);
                Ok(())
            }
            _ => Err(MTTError::QueryCannotChangeData),
        }
    }

    fn get(&self, name: &str) -> Option<Calculation> {
        match self.data.get(name) {
            Some(calc) => Some(calc.clone()),
            None => None,
        }
    }

    fn field_ids(&self) -> HashSet<&String> {
        self.data.keys().collect::<HashSet<&String>>()
        //self.data.keys().cloned().collect::<HashSet<String>>()
    }
}

#[cfg(test)]
mod queries {
    use super::*;

    #[test]
    fn holds_calculation_to_run_query() {
        let name = Uuid::new_v4().to_string();
        let data = Uuid::new_v4();
        let mut bad_data = data.clone();
        while bad_data == data {
            bad_data = Uuid::new_v4();
        }
        let mut query = Query::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(data.clone());
        query.add(name.clone(), calc);
        match query.get(&name) {
            Some(op) => {
                let expected: Field = true.into();
                let mut holder = op.clone();
                holder.add_value(data);
                assert_eq!(holder.calculate(), expected);
            }
            None => unreachable!("should have returned a calculation"),
        }
        match query.get(&name) {
            Some(op) => {
                let expected: Field = false.into();
                let mut holder = op.clone();
                holder.add_value(bad_data);
                assert_eq!(holder.calculate(), expected);
            }
            None => unreachable!("should have returned a calculation"),
        }
    }

    #[test]
    fn does_not_allow_data_changes() {
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(Uuid::nil());
        let mut query = Query::new();
        match query.add("name".to_string(), calc) {
            Ok(_) => unreachable!("Should have received an error"),
            Err(err) => match err {
                MTTError::QueryCannotChangeData => {}
                _ => unreachable!("got {:?}, should have gotten cannot change data", err),
            },
        }
    }

    #[test]
    fn returns_set_of_fields() {
        let count = 5;
        let mut field_ids: HashSet<String> = HashSet::new();
        while field_ids.len() < count {
            field_ids.insert(Uuid::new_v4().to_string());
        }
        let mut query = Query::new();
        for field_id in field_ids.iter() {
            query.add(field_id.clone(), Calculation::new(Operand::Equal));
        }
        let result = query.field_ids();
        assert_eq!(result.len(), field_ids.len());
        for field_id in result.iter() {
            assert!(
                field_ids.contains(field_id.clone()),
                "field id {:?} not found",
                field_id
            );
        }
    }
}

#[derive(Clone, Debug)]
struct Reply {
    data: Vec<Document>,
}

impl Reply {
    fn new() -> Self {
        Self { data: Vec::new() }
    }

    fn add(&mut self, doc: Document) {
        self.data.push(doc);
    }

    fn len(&self) -> usize {
        self.data.len()
    }

    fn iter(&self) -> impl Iterator<Item = &Document> {
        self.data.iter()
    }
}

#[cfg(test)]
mod replies {
    use super::*;

    #[test]
    fn is_new_empty() {
        let reply = Reply::new();
        assert_eq!(reply.len(), 0, "should have no records");
    }

    #[test]
    fn can_add_documents() {
        let mut reply = Reply::new();
        let doc = Document::new();
        reply.add(doc.clone());
        assert_eq!(reply.len(), 1);
        reply.add(doc.clone());
        assert_eq!(reply.len(), 2);
    }

    #[test]
    fn can_retrieve_documents() {
        let fieldname = "field".to_string();
        let mut doc1 = Document::new();
        doc1.add_field(fieldname.clone(), "one");
        let mut doc2 = Document::new();
        doc2.add_field(fieldname.clone(), "two");
        let mut reply = Reply::new();
        reply.add(doc1);
        reply.add(doc2);
        let mut reply_iter = reply.iter();
        let mut result1 = reply_iter.next().unwrap();
        match result1.get_field(&fieldname).unwrap() {
            Field::StaticString(output) => assert_eq!(output, "one"),
            _ => unreachable!("got {:?}: should have been static string", result1),
        }
        let result2 = reply_iter.next().unwrap();
        match result2.get_field(&fieldname).unwrap() {
            Field::StaticString(output) => assert_eq!(output, "two"),
            _ => unreachable!("got {:?}: should have been static string", result2),
        }
        match reply_iter.next() {
            None => {}
            Some(_) => unreachable!("should be out of data"),
        }
    }
}

#[derive(Clone, Debug)]
struct Document {
    data: HashMap<String, CalcValue>,
}

impl Document {
    fn new() -> Self {
        Self {
            data: HashMap::new(),
        }
    }

    fn add_field<CV>(&mut self, name: String, field: CV)
    where
        CV: Into<CalcValue>,
    {
        self.data.insert(name, field.into());
    }

    fn get_field(&self, name: &str) -> Option<Field> {
        match self.data.get(name) {
            Some(data) => Some(data.get()),
            None => None,
        }
    }

    fn get_all(&self) -> Vec<(String, Field)> {
        let mut output = Vec::new();
        for (key, value) in self.data.iter() {
            output.push((key.clone(), value.get()));
        }
        output
    }

    fn iter(&self) -> DocIter {
        DocIter::new(self)
    }
}

struct DocIter {
    storage: Vec<(String, Field)>,
}

impl DocIter {
    fn new(doc: &Document) -> Self {
        Self {
            storage: doc.get_all(),
        }
    }
}

impl Iterator for DocIter {
    type Item = (String, Field);

    fn next(&mut self) -> Option<Self::Item> {
        self.storage.pop()
    }
}

#[cfg(test)]
mod documents {
    use super::*;

    #[test]
    fn can_add_static_string() {
        let mut add = Document::new();
        let name = Uuid::new_v4().to_string();
        let data = Uuid::new_v4().to_string();
        add.add_field(name.clone(), data.clone());
        let result = add.get_field(&name).unwrap();
        match result {
            Field::StaticString(result) => assert_eq!(result, data),
            _ => unreachable!("got {:?}: should have received static string", result),
        }
    }

    fn can_add_uuid() {
        let mut add = Document::new();
        let name = Uuid::new_v4().to_string();
        let data = Uuid::new_v4();
        add.add_field(name.clone(), data.clone());
        let result = add.get_field(&name).unwrap();
        match result {
            Field::Uuid(result) => assert_eq!(result, data),
            _ => unreachable!("got {:?}: should have received uuid", result),
        }
    }
}

#[derive(Clone, Debug)]
struct Delete {
    query: Query,
}

impl Delete {
    fn new() -> Self {
        Self {
            query: Query::new(),
        }
    }

    fn get_query(&self) -> &Query {
        &self.query
    }

    fn get_query_mut(&mut self) -> &mut Query {
        &mut self.query
    }
}

#[derive(Clone, Debug)]
struct Update {
    query: Query,
    values: Document,
}

impl Update {
    fn new() -> Self {
        Self {
            query: Query::new(),
            values: Document::new(),
        }
    }

    fn get_query(&self) -> &Query {
        &self.query
    }

    fn get_query_mut(&mut self) -> &mut Query {
        &mut self.query
    }

    fn get_values(&self) -> &Document {
        &self.values
    }

    fn get_values_mut(&mut self) -> &mut Document {
        &mut self.values
    }
}

#[derive(Clone, Debug, Eq, Hash, PartialEq)]
struct Oid {
    oid: Uuid,
}

impl Oid {
    fn new() -> Self {
        Self {
            oid: Uuid::new_v4(),
        }
    }
}

struct Index {
    data: HashMap<Field, HashSet<Oid>>,
    unique: bool,
}

impl Index {
    fn new() -> Self {
        Self {
            data: HashMap::new(),
            unique: false,
        }
    }

    fn new_unique() -> Self {
        Self {
            data: HashMap::new(),
            unique: true,
        }
    }

    fn add(&mut self, field: Field, oid: Oid) -> Result<(), MTTError> {
        let oids = match self.data.get_mut(&field) {
            Some(data) => data,
            None => {
                self.data.insert(field.clone(), HashSet::new());
                self.data.get_mut(&field).unwrap()
            }
        };
        if self.unique && oids.len() > 0 {
            return Err(MTTError::FieldDuplicate("".to_string(), field));
        } else {
            oids.insert(oid);
        }
        Ok(())
    }

    fn get(&self, spec: &Operation) -> Vec<Oid> {
        let mut output = Vec::new();
        for (field, oids) in self.data.iter() {
            if spec.validate(field) {
                for oid in oids.iter() {
                    output.push(oid.clone());
                }
            }
        }
        output
    }

    fn pull(&self, calc: &Calculation) -> HashSet<Oid> {
        let mut output = HashSet::new();
        for (key, value) in self.data.iter() {
            let mut op = calc.clone();
            op.add_value(key.clone());
            if op.calculate() == true.into() {
                output = output.union(&value).cloned().collect();
            }
        }
        output
    }

    fn remove(&mut self, field: &Field, oid: &Oid) {
        match self.data.get_mut(field) {
            Some(oids) => {
                oids.remove(oid);
                if oids.len() == 0 {
                    self.data.remove(field);
                }
            }
            None => {}
        };
    }

    fn validate(&self, field: &Field) -> Result<(), MTTError> {
        if self.unique {
            match self.data.get(field) {
                Some(_) => return Err(MTTError::FieldDuplicate("".to_string(), field.clone())),
                None => {}
            }
        }
        Ok(())
    }
}

struct Indexes {
    data: HashMap<String, Index>,
}

impl Indexes {
    fn new(settings: &HashMap<String, IndexType>) -> Self {
        let mut output = HashMap::new();
        for (key, value) in settings.iter() {
            output.insert(key.clone(), value.create_index());
        }
        Self { data: output }
    }

    fn index_ids(&self) -> HashSet<&String> {
        self.data.keys().collect::<HashSet<&String>>()
    }

    fn get_index(&self, field_id: &str) -> &Index {
        self.data.get(field_id).unwrap()
    }

    fn pull(&self, field_id: &str, calc: &Calculation) -> HashSet<Oid> {
        self.get_index(field_id).pull(calc)
    }

    fn add_to_index(&mut self, field_name: &str, field: Field, oid: Oid) {
        let index = match self.data.get_mut(field_name) {
            Some(data) => data,
            None => return,
        };
        index.add(field, oid);
    }

    fn remove_from_index(&mut self, field_name: &str, field: &Field, oid: &Oid) {
        let index = match self.data.get_mut(field_name) {
            Some(data) => data,
            None => return,
        };
        index.remove(field, oid);
    }

    fn validate(&self, field_name: &str, value: &Field) -> Result<(), MTTError> {
        match self.data.get(field_name) {
            Some(index) => match index.validate(value) {
                Ok(_) => {}
                Err(err) => return Err(err),
            },
            None => {}
        }
        Ok(())
    }
}

#[cfg(test)]
mod indexes {
    use super::*;

    fn get_fields(count: usize) -> Vec<Field> {
        let mut output = Vec::new();
        while output.len() < count {
            let field: Field = Uuid::new_v4().into();
            if !output.contains(&field) {
                output.push(field);
            }
        }
        output
    }

    fn get_oids(count: usize) -> Vec<Oid> {
        let mut output = Vec::new();
        while output.len() < count {
            let oid = Oid::new();
            if !output.contains(&oid) {
                output.push(oid);
            }
        }
        output
    }

    #[test]
    fn add_to_index() {
        let mut index = Index::new();
        let count = 3;
        let fields = get_fields(count);
        let oids = get_oids(count);
        for i in 0..count {
            index.add(fields[i].clone(), oids[i].clone());
        }
        for i in 0..count {
            let spec = Operation::new("stuff".to_string(), Operand::Equal, fields[i].clone());
            let result = index.get(&spec);
            assert_eq!(result.len(), 1);
            assert_eq!(result[0], oids[i]);
        }
    }

    #[test]
    fn index_can_handle_multiple_entries() {
        let mut index = Index::new();
        let count = 3;
        let fields = get_fields(1);
        let oids = get_oids(count);
        for i in 0..count {
            index.add(fields[0].clone(), oids[i].clone());
        }
        let spec = Operation::new("unimportant".to_string(), Operand::Equal, fields[0].clone());
        let result = index.get(&spec);
        assert_eq!(result.len(), 3);
        for oid in oids {
            assert!(result.contains(&oid));
        }
    }

    #[test]
    fn can_remove_oid() {
        let mut index = Index::new();
        let count = 3;
        let pos = 1;
        let fields = get_fields(1);
        let oids = get_oids(count);
        for i in 0..count {
            index.add(fields[0].clone(), oids[i].clone());
        }
        index.remove(&fields[0], &oids[pos]);
        let spec = Operation::new("x".to_string(), Operand::Equal, fields[0].clone());
        let result = index.get(&spec);
        assert!(!result.contains(&oids[pos]), "should have removed oid");
    }

    #[test]
    fn are_empty_indexes_removed() {
        let mut index = Index::new();
        let field: Field = Uuid::new_v4().into();
        let oid = Oid::new();
        index.add(field.clone(), oid.clone());
        index.remove(&field, &oid);
        assert_eq!(index.data.len(), 0);
    }

    #[test]
    fn do_unique_indexes_error_on_duplicates() {
        let mut index = Index::new_unique();
        let field: Field = "fred".into();
        let oids = get_oids(2);
        index.add(field.clone(), oids[0].clone()).unwrap();
        match index.add(field.clone(), oids[0].clone()) {
            Ok(_) => unreachable!("should have been an error"),
            Err(err) => match err {
                MTTError::FieldDuplicate(field_name, value) => {
                    assert_eq!(field_name, "");
                    assert_eq!(value, field);
                }
                _ => unreachable!("got {:?}: should have been duplicate field", err),
            },
        }
    }

    #[test]
    fn index_returns_validate() {
        let mut index = Index::new();
        let field: Field = "stuff".into();
        let oid = Oid::new();
        index.add(field.clone(), oid).unwrap();
        match index.validate(&field) {
            Ok(_) => {}
            Err(err) => unreachable!("got {:?}: should have returned without issue", err),
        }
    }

    #[test]
    fn unique_return_duplicate_error() {
        let mut index = Index::new_unique();
        let field: Field = "fred".into();
        let oid = Oid::new();
        index.add(field.clone(), oid).unwrap();
        match index.validate(&field) {
            Ok(_) => unreachable!("should have gotten a duplication error"),
            Err(err) => match err {
                MTTError::FieldDuplicate(field_name, value) => {
                    assert_eq!(field_name, "");
                    assert_eq!(value, field);
                }
                _ => unreachable!("got {:?}: should have been duplicate field", err),
            },
        }
    }
}

struct DocumentFile {
    docdef: DocDef,
    docs: HashMap<Oid, Document>,
    indexes: Indexes,
    queue: Queue,
    rx: Receiver<Message>,
}

impl DocumentFile {
    fn new(queue: Queue, rx: Receiver<Message>, docdef: DocDef) -> Self {
        Self {
            docdef: docdef.clone(),
            docs: HashMap::new(),
            indexes: docdef.create_indexes(),
            queue: queue,
            rx: rx,
        }
    }

    fn start(mut queue: Queue, msg: Message) {
        let (tx, rx) = channel();
        let name = match msg.get_document_id() {
            NameID::Name(name) => name.clone(),
            NameID::ID(id) => id.to_string(),
            NameID::None => unreachable!("should never be none"),
        };
        let routes = [
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Addition),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Delete),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Query),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Show),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Update),
            ),
        ]
        .to_vec();
        match queue.register(tx, name, routes) {
            Ok(_) => {}
            Err(err) => {
                let error = msg.response(err);
                queue.send(error).unwrap();
                return;
            }
        }
        let action = msg.get_action();
        let docdef = match action {
            MsgAction::Create(data) => data.clone(),
            _ => unreachable!("got {:?}: should have been a create message", action),
        };
        let mut doc = DocumentFile::new(queue.clone(), rx, docdef);
        spawn(move || {
            doc.listen();
        });
        let reply = msg.response(Reply::new());
        queue.send(reply).unwrap();
    }

    fn listen(&mut self) {
        loop {
            let msg = self.rx.recv().unwrap();
            let result = match msg.get_action() {
                MsgAction::Addition(data) => self.add_document(data),
                MsgAction::Delete(delete) => self.delete(delete),
                MsgAction::Query(query) => self.query(query),
                MsgAction::Update(update) => self.update(update),
                _ => Reply::new().into(),
            };
            self.queue.send(msg.response(result)).unwrap();
        }
    }

    fn get_docdef(&self) -> &DocDef {
        &self.docdef
    }

    fn get_documents<'a>(&self) -> impl Iterator<Item = (&Oid, &Document)> {
        self.docs.iter()
    }

    fn validate(&self, field_name: &str, value: Option<Field>) -> Result<Field, MTTError> {
        let output = match self.docdef.validate(field_name, value) {
            Ok(data) => data,
            Err(err) => return Err(err),
        };
        match self.indexes.validate(field_name, &output) {
            Ok(_) => {}
            Err(err) => return Err(err),
        }
        Ok(output)
    }

    fn add_field_to_error(key: String, err: MTTError) -> MTTError {
        match err {
            MTTError::DocumentFieldMissing(_) => MTTError::DocumentFieldMissing(key),
            MTTError::FieldDuplicate(_, field) => MTTError::FieldDuplicate(key, field.clone()),
            _ => err.clone(),
        }
    }

    fn add_to_index(&mut self, field_name: &str, field: Field, oid: Oid) {
        self.indexes.add_to_index(field_name, field, oid)
    }

    fn remove_from_index(&mut self, field_name: &str, field: &Field, oid: &Oid) {
        self.indexes.remove_from_index(field_name, field, oid);
    }

    fn add_document(&mut self, addition: &Addition) -> MsgAction {
        let mut holder = Document::new();
        let doc = addition.get_document();
        for (key, value) in doc.iter() {
            match self.validate(&key, Some(value.clone())) {
                Ok(data) => {
                    holder.add_field(key.clone(), value.clone());
                }
                Err(err) => return Self::add_field_to_error(key.to_string(), err).into(),
            }
        }
        for (key, value) in self.docdef.iter() {
            match holder.get_field(key) {
                Some(_) => {}
                None => match self.validate(key, None) {
                    Ok(data) => holder.add_field(key.clone(), data.clone()),
                    Err(err) => return Self::add_field_to_error(key.to_string(), err).into(),
                },
            }
        }
        let mut oid = Oid::new();
        while self.docs.contains_key(&oid) {
            oid = Oid::new();
        }
        self.docs.insert(oid.clone(), holder.clone());
        for (key, value) in holder.iter() {
            self.add_to_index(&key, value.clone(), oid.clone());
        }
        let mut reply = Reply::new();
        reply.add(holder);
        reply.into()
    }

    fn delete(&mut self, delete: &Delete) -> MsgAction {
        let mut reply = Reply::new();
        let oids = self.run_query(delete.get_query()).unwrap();
        for oid in oids.iter() {
            reply.add(self.docs.get(oid).unwrap().clone());
            self.docs.remove(oid);
        }
        reply.into()
    }

    fn run_query(&self, query: &Query) -> Result<HashSet<Oid>, MTTError> {
        let query_ids = query.field_ids();
        let doc_ids = self.docdef.field_ids();
        let index_ids = self.indexes.index_ids();
        if !doc_ids.is_superset(&query_ids) {
            let missed = query_ids.difference(&doc_ids).last().unwrap();
            return Err(MTTError::DocumentFieldNotFound(missed.to_string()));
        }
        let used_indexed = index_ids
            .intersection(&query_ids)
            .cloned()
            .collect::<HashSet<&String>>();
        let used_unindexed = query_ids
            .difference(&index_ids)
            .cloned()
            .collect::<HashSet<&String>>();
        let mut oids = HashSet::new();
        if used_indexed.is_empty() {
            'docs: for (oid, doc) in self.docs.iter() {
                for query_id in query_ids.iter() {
                    let doc_data = doc.get_field(query_id).unwrap();
                    let mut operation = query.get(query_id).unwrap();
                    match operation.add_value(doc_data.clone()) {
                        Ok(_) => {}
                        Err(err) => match err {
                            MTTError::DocumentFieldWrongDataType(got, expected) => {
                                return Err(MTTError::DocumentFieldWrongDataType(expected, got))
                            }
                            _ => return Err(err),
                        },
                    }
                    if operation.calculate() == false.into() {
                        continue 'docs;
                    }
                }
                oids.insert(oid.clone());
            }
        } else {
            let mut first_time = true;
            for field_id in used_indexed.iter() {
                let op = query.get(field_id).unwrap();
                let holder = self.indexes.pull(field_id, &op);
                if first_time {
                    oids = holder;
                } else {
                    oids = oids.intersection(&holder).cloned().collect();
                }
                first_time = false;
            }
            for field_id in used_unindexed.iter() {
                let mut holder: HashSet<Oid> = HashSet::new();
                for oid in oids.iter() {
                    let doc = self.docs.get(oid).unwrap();
                    let mut op = query.get(field_id).unwrap().clone();
                    op.add_value(doc.get_field(field_id).unwrap());
                    if op.calculate() == true.into() {
                        holder.insert(oid.clone());
                    }
                }
                oids = oids.intersection(&holder).cloned().collect();
            }
        }
        Ok(oids)
    }

    fn query(&self, query: &Query) -> MsgAction {
        match self.run_query(query) {
            Ok(result) => {
                let mut reply = Reply::new();
                for oid in result.iter() {
                    reply.add(self.docs.get(oid).unwrap().clone());
                }
                reply.into()
            }
            Err(err) => err.into(),
        }
    }

    fn update(&mut self, update: &Update) -> MsgAction {
        let oids = match self.run_query(update.get_query()) {
            Ok(result) => result,
            Err(err) => return err.into(),
        };
        let mut holder: HashMap<Oid, [Document; 2]> = HashMap::new();
        for oid in oids.iter() {
            let doc = self.docs.get(oid).unwrap();
            let old_new = [doc.clone(), doc.clone()];
            holder.insert(oid.clone(), old_new);
        }
        let mut index_holder = self.docdef.create_indexes();
        for (oid, docs) in holder.iter_mut() {
            let mut updated = Document::new();
            for (key, value) in update.get_values().iter() {
                match self.validate(&key, Some(value.clone())) {
                    Ok(field) => match index_holder.validate(&key, &field) {
                        Ok(_) => {
                            index_holder.add_to_index(&key, field.clone(), oid.clone());
                            docs[1].add_field(key.clone(), field.clone());
                        }
                        Err(err) => return Self::add_field_to_error(key.to_string(), err).into(),
                    },
                    Err(err) => return err.into(),
                }
            }
        }
        let mut reply = Reply::new();
        for (oid, docs) in holder.iter() {
            self.docs.insert(oid.clone(), docs[1].clone());
            reply.add(docs[1].clone());
            for (key, value) in docs[0].iter() {
                self.remove_from_index(&key, &value, oid);
                self.add_to_index(&key, docs[1].get_field(&key).unwrap().clone(), oid.clone());
            }
        }
        reply.into()
    }
}

#[cfg(test)]
mod document_files {
    use super::{support_test::TIMEOUT, *};
    use std::sync::mpsc::RecvTimeoutError;

    struct TestDocument {
        docdef: DocDef,
        doc_name: String,
        queue: Queue,
        routes: Vec<RouteRequest>,
        tx: Sender<Message>,
        rx: Receiver<Message>,
    }

    impl TestDocument {
        fn new(field_types: Vec<FieldType>) -> Self {
            let mut docdef = DocDef::new();
            let mut count = 0;
            for field_type in field_types.iter() {
                docdef.add_field(format!("field{}", count), field_type.clone());
                count += 1;
            }
            let (tx, rx) = channel();
            Self {
                docdef: docdef,
                doc_name: Uuid::new_v4().to_string(),
                queue: Queue::new(),
                routes: [
                    RouteRequest::new(Include::All, Include::All, Include::Some(Action::Reply)),
                    RouteRequest::new(Include::All, Include::All, Include::Some(Action::Error)),
                ]
                .to_vec(),
                tx: tx,
                rx: rx,
            }
        }

        fn get_docdef_mut(&mut self) -> &mut DocDef {
            &mut self.docdef
        }

        fn get_routes_mut(&mut self) -> &mut Vec<RouteRequest> {
            &mut self.routes
        }

        fn get_queue(&mut self) -> Queue {
            self.queue.clone()
        }

        fn get_receiver(&self) -> &Receiver<Message> {
            &self.rx
        }

        fn get_sender(&self) -> Sender<Message> {
            self.tx.clone()
        }

        fn send<A>(&self, action: A) -> Result<(), MTTError>
        where
            A: Into<MsgAction>,
        {
            let msg = Message::new(self.doc_name.clone(), action);
            self.queue.send(msg)
        }

        fn start(&mut self) {
            let msg = Message::new(self.doc_name.clone(), self.docdef.clone());
            DocumentFile::start(self.queue.clone(), msg);
            self.queue
                .register(
                    self.tx.clone(),
                    Uuid::new_v4().to_string(),
                    self.routes.clone(),
                )
                .unwrap();
        }

        fn populate(&self, data: Vec<Field>) {
            let mut add = Addition::new();
            let mut count = 0;
            for item in data.iter() {
                add.add_field(format!("field{}", count), item.clone());
                count += 1;
            }
            self.send(add).unwrap();
            self.rx.recv().unwrap(); // eat addition response.
        }
    }

    fn standard_routes() -> Vec<RouteRequest> {
        [
            RouteRequest::new(Include::All, Include::All, Include::Some(Action::Reply)),
            RouteRequest::new(Include::All, Include::All, Include::Some(Action::Error)),
        ]
        .to_vec()
    }

    fn create_docdef(field_types: Vec<FieldType>) -> (DocDef, String) {
        let mut output = DocDef::new();
        let mut count = 0;
        for field_type in field_types.iter() {
            output.add_field(format!("field{}", count), field_type.clone());
            count += 1;
        }
        (output, format!("name-{}", Uuid::new_v4()))
    }

    fn test_doc(
        name: &str,
        docdef: DocDef,
        routes: Vec<RouteRequest>,
    ) -> (Queue, Receiver<Message>) {
        let (tx, rx) = channel();
        let mut queue = Queue::new();
        let msg = Message::new(name, docdef);
        DocumentFile::start(queue.clone(), msg);
        queue
            .register(tx, Uuid::new_v4().to_string(), routes)
            .unwrap();
        (queue, rx)
    }

    #[test]
    fn does_not_respond_to_create() {
        let docdef = DocDef::new();
        let name = "quiet";
        let (mut queue, rx) = test_doc(name, docdef, standard_routes());
        let other = "alternate";
        let (tx, _) = channel();
        queue.register(tx, other.to_string(), Vec::new()).unwrap();
        let msg = Message::new(name, DocDef::new());
        queue.send(msg).unwrap();
        match rx.recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }

    #[test]
    fn can_show_document_details() {
        let docdef = DocDef::new();
        let name = "first";
        let (queue, rx) = test_doc(name, docdef, standard_routes());
        let msg = Message::new(name, MsgAction::Show);
        queue.send(msg.clone()).unwrap();
        let show = rx.recv_timeout(TIMEOUT).unwrap();
    }

    #[test]
    fn can_query_new_document() {
        let docdef = DocDef::new();
        let name = "second";
        let (queue, rx) = test_doc(name, docdef, standard_routes());
        let query = Message::new(name, Query::new());
        queue.send(query).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        match result.get_action() {
            MsgAction::Reply(data) => assert_eq!(data.len(), 0),
            _ => unreachable!(
                "got {:?}: should have received a reply",
                result.get_action()
            ),
        }
    }

    #[test]
    fn only_responses_to_its_show_request() {
        let docdef = DocDef::new();
        let name = "quiet";
        let (mut queue, rx) = test_doc(name, docdef, standard_routes());
        let other = "alternate";
        let (tx, _) = channel();
        queue.register(tx, other.to_string(), Vec::new()).unwrap();
        let msg = Message::new(other, MsgAction::Show);
        queue.send(msg).unwrap();
        match rx.recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }

    #[test]
    fn only_responses_to_its_query_request() {
        let docdef = DocDef::new();
        let name = "quiet";
        let (mut queue, rx) = test_doc(name, docdef, standard_routes());
        let other = "alternate";
        let (tx, _) = channel();
        queue.register(tx, other.to_string(), Vec::new()).unwrap();
        let msg = Message::new(other, Query::new());
        queue.send(msg).unwrap();
        match rx.recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }

    #[test]
    fn can_document_be_added() {
        let mut docdef = DocDef::new();
        let name = "field";
        let doc_name = "document";
        let data = Uuid::new_v4();
        docdef.add_field(name.to_string(), FieldType::Uuid);
        let (queue, rx) = test_doc(doc_name, docdef, standard_routes());
        let mut new_doc = Addition::new();
        new_doc.add_field(name.to_string(), data.clone());
        let msg = Message::new(doc_name, new_doc);
        queue.send(msg.clone()).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
        match result.get_action() {
            MsgAction::Reply(output) => {
                assert_eq!(output.len(), 1);
                let holder = output.iter().next().unwrap();
                match holder.get_field(name) {
                    Some(field) => match field {
                        Field::Uuid(store) => assert_eq!(store, data),
                        _ => unreachable!(
                            "got {:?}: should have received uuid",
                            holder.get_field(name).unwrap()
                        ),
                    },
                    None => unreachable!("{:?} did not contain field '{}'", holder, name),
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", result),
        }
        let msg = Message::new(doc_name, Query::new());
        queue.send(msg.clone()).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
        match result.get_action() {
            MsgAction::Reply(output) => {
                assert_eq!(output.len(), 1);
                let holder = output.iter().next().unwrap();
                match holder.get_field(name) {
                    Some(field) => match field {
                        Field::Uuid(store) => assert_eq!(store, data),
                        _ => unreachable!(
                            "got {:?}: should have received uuid",
                            holder.get_field(name).unwrap()
                        ),
                    },
                    None => unreachable!("{:?} did not contain field '{}'", holder, name),
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", result),
        }
    }

    #[test]
    fn only_responses_to_its_additions() {
        let docdef = DocDef::new();
        let name = "quiet";
        let (mut queue, rx) = test_doc(name, docdef, standard_routes());
        let other = "alternate";
        let (tx, _) = channel();
        queue.register(tx, other.to_string(), Vec::new()).unwrap();
        let msg = Message::new(other, Addition::new());
        queue.send(msg).unwrap();
        match rx.recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }

    #[test]
    fn can_add_multiple_documents() {
        let count = 4;
        let mut docdef = DocDef::new();
        let name = "field";
        let doc_name = "document";
        let data = Uuid::new_v4();
        docdef.add_field(name.to_string(), FieldType::Uuid);
        let (queue, rx) = test_doc(doc_name, docdef, standard_routes());
        let mut new_doc = Addition::new();
        new_doc.add_field(name.to_string(), data.clone());
        for _ in 0..count {
            let msg = Message::new(doc_name, new_doc.clone());
            queue.send(msg.clone()).unwrap();
            rx.recv_timeout(TIMEOUT).unwrap(); // eats the confirmation reply.
        }
        let msg = Message::new(doc_name, Query::new());
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        match result.get_action() {
            MsgAction::Reply(data) => assert_eq!(data.len(), count),
            _ => unreachable!("got {:?}: should have been a reply", result.get_action()),
        }
    }

    #[test]
    fn errors_on_wrong_field_name() {
        let (docdef, doc_name) = create_docdef([FieldType::Uuid].to_vec());
        let field_name = Uuid::new_v4().to_string();
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let mut addition = Addition::new();
        addition.add_field(field_name.clone(), Uuid::new_v4());
        let msg = Message::new(doc_name, addition);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        match result.get_action() {
            MsgAction::Error(err) => match err {
                MTTError::DocumentFieldNotFound(data) => assert_eq!(data, &field_name),
                _ => unreachable!("got {:?}: should have been document field not found.", err),
            },
            _ => unreachable!("got {:?}: should have been an error", result.get_action()),
        }
    }

    #[test]
    fn errors_on_wrong_field_type() {
        let (docdef, doc_name) = create_docdef([FieldType::Uuid].to_vec());
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let mut addition = Addition::new();
        addition.add_field("field0".to_string(), "astring");
        let msg = Message::new(doc_name, addition);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        match result.get_action() {
            MsgAction::Error(err) => match err {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(got, &FieldType::StaticString);
                    assert_eq!(expected, &FieldType::Uuid);
                }
                _ => unreachable!(
                    "got {:?}: should have been document field data mismatch.",
                    err
                ),
            },
            _ => unreachable!("got {:?}: should have been an error", result.get_action()),
        }
    }

    #[test]
    fn errors_on_missing_fields() {
        let (docdef, doc_name) = create_docdef([FieldType::Uuid, FieldType::Uuid].to_vec());
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let mut addition = Addition::new();
        addition.add_field("field0".to_string(), Uuid::nil());
        let msg = Message::new(doc_name, addition);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        match result.get_action() {
            MsgAction::Error(err) => match err {
                MTTError::DocumentFieldMissing(field) => assert_eq!(field, "field1"),
                _ => unreachable!("got {:?}: should have been document field missing", err),
            },
            _ => unreachable!("got {:?}: should have been an error", result.get_action()),
        }
    }

    #[test]
    fn does_query_return_related_entries() {
        let mut doc = TestDocument::new([FieldType::Uuid].to_vec());
        doc.start();
        let count = 3;
        let mut values: HashSet<Field> = HashSet::new();
        while values.len() < count {
            values.insert(Uuid::new_v4().into());
        }
        for value in values.iter() {
            doc.populate([value.clone()].to_vec());
        }
        let expected = values.iter().last().unwrap().clone();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(expected.clone());
        let mut query = Query::new();
        query.add("field0".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(
                    data.len(),
                    1,
                    "should return one entry containing {:?} got:\n{:?}",
                    expected,
                    action
                );
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), expected);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn gets_all_documents_in_query() {
        let mut doc = TestDocument::new([FieldType::Integer].to_vec());
        doc.start();
        let values = [
            [1.into()].to_vec(),
            [2.into()].to_vec(),
            [1.into()].to_vec(),
            [3.into()].to_vec(),
            [1.into()].to_vec(),
            [4.into()].to_vec(),
            [1.into()].to_vec(),
            [5.into()].to_vec(),
        ];
        for value in values.iter() {
            doc.populate(value.clone());
        }
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(1);
        let mut query = Query::new();
        query.add("field0".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        let input: Field = 1.into();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), 4, "should return 4 entries");
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), input);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn query_should_work_with_multiple_fields() {
        let mut doc =
            TestDocument::new([FieldType::StaticString, FieldType::StaticString].to_vec());
        doc.start();
        let values = [
            ["a".into(), "a".into()].to_vec(),
            ["a".into(), "b".into()].to_vec(),
            ["b".into(), "a".into()].to_vec(),
            ["b".into(), "b".into()].to_vec(),
        ];
        for value in values.iter() {
            doc.populate(value.clone());
        }
        let mut query = Query::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("a");
        query.add("field0".to_string(), calc);
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("b");
        query.add("field1".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                let afield: Field = "a".into();
                let bfield: Field = "b".into();
                assert_eq!(data.len(), 1, "should return one entry:\n{:?}", action);
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), afield);
                    assert_eq!(doc.get_field("field1").unwrap(), bfield);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn query_should_work_with_multiple_inexed_fields() {
        let mut doc =
            TestDocument::new([FieldType::StaticString, FieldType::StaticString].to_vec());
        let docdef = doc.get_docdef_mut();
        docdef.add_index("field0".to_string(), IndexType::Index);
        docdef.add_index("field1".to_string(), IndexType::Index);
        doc.start();
        let values = [
            ["a".into(), "a".into()].to_vec(),
            ["a".into(), "b".into()].to_vec(),
            ["b".into(), "a".into()].to_vec(),
            ["b".into(), "b".into()].to_vec(),
        ];
        for value in values.iter() {
            doc.populate(value.clone());
        }
        let mut query = Query::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("a");
        query.add("field0".to_string(), calc);
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("b");
        query.add("field1".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                let afield: Field = "a".into();
                let bfield: Field = "b".into();
                assert_eq!(data.len(), 1, "should return one entry:\n{:?}", action);
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), afield);
                    assert_eq!(doc.get_field("field1").unwrap(), bfield);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn query_should_work_with_mixed_inexed_fields() {
        let mut doc =
            TestDocument::new([FieldType::StaticString, FieldType::StaticString].to_vec());
        let docdef = doc.get_docdef_mut();
        docdef.add_index("field0".to_string(), IndexType::Index);
        doc.start();
        let values = [
            ["a".into(), "a".into()].to_vec(),
            ["a".into(), "b".into()].to_vec(),
            ["b".into(), "a".into()].to_vec(),
            ["b".into(), "b".into()].to_vec(),
        ];
        for value in values.iter() {
            doc.populate(value.clone());
        }
        let mut query = Query::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("a");
        query.add("field0".to_string(), calc);
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("b");
        query.add("field1".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                let afield: Field = "a".into();
                let bfield: Field = "b".into();
                assert_eq!(data.len(), 1, "should return one entry:\n{:?}", action);
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), afield);
                    assert_eq!(doc.get_field("field1").unwrap(), bfield);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn errors_on_bad_field_name() {
        let (docdef, doc_name) = create_docdef(Vec::new());
        let field_name = "wrong";
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let mut query = Query::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("something");
        query.add(field_name.to_string(), calc);
        let msg = Message::new(doc_name, query);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(data) => match data {
                MTTError::DocumentFieldNotFound(output) => assert_eq!(output, field_name),
                _ => unreachable!("got {:?}: should been field not found", data),
            },
            _ => unreachable!("got {:?}: should have been a error", action),
        }
    }

    #[test]
    fn errors_on_bad_field_type() {
        let mut doc = TestDocument::new([FieldType::Uuid].to_vec());
        doc.start();
        doc.populate([Uuid::nil().into()].to_vec());
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value("notUUID");
        let mut query = Query::new();
        query.add("field0".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(data) => match data {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(expected, &FieldType::Uuid);
                    assert_eq!(got, &FieldType::StaticString);
                }
                _ => unreachable!("got {:?}: should been field not found", data),
            },
            _ => unreachable!("got {:?}: should have been a error", action),
        }
    }

    #[test]
    fn can_use_default_values() {
        let (mut docdef, doc_name) = create_docdef([FieldType::StaticString].to_vec());
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(FieldType::StaticString);
        docdef.set_default("field0", calc);
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let new_doc = Addition::new();
        let msg = Message::new(doc_name, new_doc);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(docs) => {
                assert_eq!(docs.len(), 1);
                for doc in docs.iter() {
                    let expected: Field = "".into();
                    assert_eq!(doc.get_field("field0").unwrap(), expected);
                }
            }
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
    }

    #[test]
    fn can_a_default_value_be_set() {
        let (mut docdef, doc_name) = create_docdef([FieldType::Uuid].to_vec());
        let input = Uuid::nil();
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(input.clone());
        docdef.set_default("field0", calc);
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let new_doc = Addition::new();
        let msg = Message::new(doc_name, new_doc);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(docs) => {
                assert_eq!(docs.len(), 1);
                let expected: Field = input.into();
                for doc in docs.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), expected);
                }
            }
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
    }

    #[test]
    fn can_default_values_be_overridden() {
        let (mut docdef, doc_name) = create_docdef([FieldType::Uuid].to_vec());
        let mut calc = Calculation::new(Operand::Assign);
        calc.add_value(FieldType::Uuid);
        docdef.set_default("field0", calc);
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let mut new_doc = Addition::new();
        new_doc.add_field("field0".to_string(), Uuid::nil());
        let msg = Message::new(doc_name, new_doc);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(docs) => {
                assert_eq!(docs.len(), 1);
                let expected: Field = Uuid::nil().into();
                for doc in docs.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), expected);
                }
            }
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
    }

    #[test]
    fn empty_update_query_results_in_zero_changes() {
        let count = 5;
        let mut ids: HashSet<Uuid> = HashSet::new();
        while ids.len() < count {
            ids.insert(Uuid::new_v4());
        }
        let id = ids.iter().last().unwrap().clone();
        ids.remove(&id);
        let mut doc = TestDocument::new([FieldType::Uuid].to_vec());
        doc.start();
        for id in ids.iter() {
            doc.populate([id.clone().into()].to_vec());
        }
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(id);
        update.get_query_mut().add("field0".to_string(), calc);
        update
            .get_values_mut()
            .add_field("field0".to_string(), Uuid::nil());
        doc.send(update).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(docs) => assert_eq!(docs.len(), 0),
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
    }

    #[test]
    fn only_responses_to_its_update_request() {
        let mut doc = TestDocument::new([FieldType::Integer].to_vec());
        doc.start();
        let alt_doc_name = "alternate";
        let (tx, _) = channel();
        let mut queue = doc.get_queue();
        queue
            .register(tx, alt_doc_name.to_string(), Vec::new())
            .unwrap();
        let update = Update::new();
        let msg = Message::new(alt_doc_name, update);
        queue.send(msg).unwrap();
        match doc.get_receiver().recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }

    #[test]
    fn changes_information_requested() {
        let mut doc = TestDocument::new([FieldType::Uuid, FieldType::StaticString].to_vec());
        doc.start();
        let id = Uuid::new_v4();
        let old = "old";
        let new = "new";
        doc.populate([id.into(), old.into()].to_vec());
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(id.clone());
        update
            .get_query_mut()
            .add("field0".to_string(), calc.clone());
        update.get_values_mut().add_field("field1".to_string(), new);
        doc.send(update).unwrap();
        let mut results: HashMap<String, Message> = HashMap::new();
        results.insert(
            "update".to_string(),
            doc.get_receiver().recv_timeout(TIMEOUT).unwrap(),
        );
        let mut query = Query::new();
        query.add("field0".to_string(), calc.clone());
        doc.send(query).unwrap();
        results.insert(
            "query".to_string(),
            doc.get_receiver().recv_timeout(TIMEOUT).unwrap(),
        );
        let expected_id: Field = id.into();
        let output: Field = new.into();
        for (key, result) in results.iter() {
            let action = result.get_action();
            match action {
                MsgAction::Reply(docs) => {
                    assert_eq!(docs.len(), 1, "{}", key);
                    for doc in docs.iter() {
                        assert_eq!(doc.get_field("field0").unwrap(), expected_id, "{}", key);
                        assert_eq!(doc.get_field("field1").unwrap(), output, "{}", key);
                    }
                }
                _ => unreachable!("got {:?}: should have gotten a reply", action),
            }
        }
    }

    #[test]
    fn changes_only_the_queried() {
        let mut doc = TestDocument::new([FieldType::Uuid, FieldType::StaticString].to_vec());
        doc.start();
        let mut ids: HashSet<Uuid> = HashSet::new();
        while ids.len() < 2 {
            ids.insert(Uuid::new_v4());
        }
        let expected = ids.iter().last().unwrap();
        let old = "old";
        let new = "new";
        let mut values: Vec<Vec<Field>> = Vec::new();
        for id in ids.iter() {
            let mut holder: Vec<Field> = Vec::new();
            holder.push(id.clone().into());
            holder.push(old.into());
            values.push(holder);
        }
        for value in values {
            doc.populate(value);
        }
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(expected.clone());
        update.get_query_mut().add("field0".to_string(), calc);
        update.get_values_mut().add_field("field1".to_string(), new);
        doc.send(update).unwrap();
        doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(new);
        let mut query = Query::new();
        query.add("field1".to_string(), calc);
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(docs) => {
                assert_eq!(docs.len(), 1);
                let expected_id: Field = expected.clone().into();
                let output: Field = new.into();
                for doc in docs.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), expected_id);
                    assert_eq!(doc.get_field("field1").unwrap(), output);
                }
            }
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
    }

    #[test]
    fn can_handle_multiple_updates() {
        let mut doc = TestDocument::new([FieldType::Uuid, FieldType::StaticString].to_vec());
        doc.start();
        let count = 3;
        let id = Uuid::new_v4();
        let old = "old";
        let new = "new";
        for _ in 0..count {
            doc.populate([id.into(), old.into()].to_vec());
        }
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(id.clone());
        let mut update = Update::new();
        update
            .get_query_mut()
            .add("field0".to_string(), calc.clone());
        update.get_values_mut().add_field("field1".to_string(), new);
        doc.send(update).unwrap();
        let mut results: HashMap<String, Message> = HashMap::new();
        results.insert(
            "update".to_string(),
            doc.get_receiver().recv_timeout(TIMEOUT).unwrap(),
        );
        let mut query = Query::new();
        query.add("field0".to_string(), calc.clone());
        doc.send(query).unwrap();
        results.insert(
            "query".to_string(),
            doc.get_receiver().recv_timeout(TIMEOUT).unwrap(),
        );
        let expected_id: Field = id.into();
        let output: Field = new.into();
        for (key, result) in results.iter() {
            let action = result.get_action();
            match action {
                MsgAction::Reply(docs) => {
                    assert_eq!(docs.len(), count, "{}", key);
                    for doc in docs.iter() {
                        assert_eq!(doc.get_field("field0").unwrap(), expected_id, "{}", key);
                        assert_eq!(doc.get_field("field1").unwrap(), output, "{}", key);
                    }
                }
                _ => unreachable!("got {:?}: should have gotten a reply", action),
            }
        }
    }

    #[test]
    fn update_errors_on_bad_field_name() {
        let mut doc = TestDocument::new([FieldType::Uuid, FieldType::StaticString].to_vec());
        doc.start();
        let id = Uuid::new_v4();
        let old = "old";
        let new = "new";
        doc.populate([id.into(), old.into()].to_vec());
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(id.clone());
        update.get_query_mut().add("field0".to_string(), calc);
        update.get_values_mut().add_field("wrong".to_string(), new);
        doc.send(update).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(err) => match err {
                MTTError::DocumentFieldNotFound(data) => assert_eq!(data, "wrong"),
                _ => unreachable!("got {:?}: should have gotten an missing field", err),
            },
            _ => unreachable!("got {:?}: should have gotten an error", action),
        }
    }

    #[test]
    fn update_errors_on_bad_field_type() {
        let mut doc = TestDocument::new([FieldType::Uuid, FieldType::StaticString].to_vec());
        doc.start();
        let id = Uuid::new_v4();
        let old = "old";
        let new = Uuid::nil();
        doc.populate([id.into(), old.into()].to_vec());
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(id.clone());
        update.get_query_mut().add("field0".to_string(), calc);
        update.get_values_mut().add_field("field1".to_string(), new);
        doc.send(update).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(err) => match err {
                MTTError::DocumentFieldWrongDataType(expected, got) => {
                    assert_eq!(expected, &FieldType::StaticString);
                    assert_eq!(got, &FieldType::Uuid);
                }
                _ => unreachable!("got {:?}: should have gotten incorrect file type", err),
            },
            _ => unreachable!("got {:?}: should have gotten an error", action),
        }
    }

    #[test]
    fn does_update_maintain_unique_fields() {
        let (mut docdef, doc_name) = create_docdef([FieldType::Uuid].to_vec());
        docdef.add_index("field0".to_string(), IndexType::Unique);
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let field0 = Uuid::new_v4();
        let mut addition = Addition::new();
        addition.add_field("field0".to_string(), field0.clone());
        let msg = Message::new(doc_name.clone(), addition.clone());
        queue.send(msg).unwrap();
        rx.recv_timeout(TIMEOUT).unwrap();
        let msg2 = Message::new(doc_name.clone(), addition);
        queue.send(msg2).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(err) => match err {
                MTTError::FieldDuplicate(key, field) => {
                    let expected: Field = field0.into();
                    assert_eq!(key, "field0");
                    assert_eq!(field, &expected);
                }
                _ => unreachable!("got {:?}: should have gotten an missing field", err),
            },
            _ => unreachable!("got {:?}: should have gotten an error", action),
        }
    }

    #[test]
    fn unique_value_remains_available_if_failure_occurs() {
        let (mut docdef, doc_name) = create_docdef([FieldType::Uuid, FieldType::Uuid].to_vec());
        docdef.add_index("field0".to_string(), IndexType::Unique);
        let (queue, rx) = test_doc(doc_name.as_str(), docdef, standard_routes());
        let field0 = Uuid::new_v4();
        let mut bad_addition = Addition::new();
        bad_addition.add_field("field0".to_string(), field0.clone());
        bad_addition.add_field("field1".to_string(), "");
        let msg = Message::new(doc_name.clone(), bad_addition.clone());
        queue.send(msg).unwrap();
        rx.recv_timeout(TIMEOUT).unwrap();
        let mut good_addition = Addition::new();
        good_addition.add_field("field0".to_string(), field0.clone());
        good_addition.add_field("field1".to_string(), field0.clone());
        let msg = Message::new(doc_name.clone(), good_addition.clone());
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(_) => {}
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
    }

    #[test]
    fn updating_unique_updates_index_entries() {
        let mut doc = TestDocument::new([FieldType::StaticString].to_vec());
        doc.get_docdef_mut()
            .add_index("field0".to_string(), IndexType::Unique);
        doc.start();
        let old = "old";
        let new = "new";
        let fold: Field = old.into();
        let fnew: Field = new.into();
        doc.populate([old.into()].to_vec());
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(old);
        update.get_query_mut().add("field0".to_string(), calc);
        update.get_values_mut().add_field("field0".to_string(), new);
        doc.send(update).unwrap();
        doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let mut old_addition = Addition::new();
        old_addition.add_field("field0".to_string(), old);
        doc.send(old_addition).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), 1);
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), fold);
                }
            }
            _ => unreachable!("got {:?}: should have gotten a reply", action),
        }
        let mut new_addition = Addition::new();
        new_addition.add_field("field0".to_string(), new);
        doc.send(new_addition).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(err) => match err {
                MTTError::FieldDuplicate(key, field) => {
                    let expected: Field = new.into();
                    assert_eq!(key, "field0");
                    assert_eq!(field, &expected);
                }
                _ => unreachable!("got {:?}: should have gotten an missing field", err),
            },
            _ => unreachable!("got {:?}: should have gotten an error", action),
        }
    }

    #[test]
    fn unique_available_after_bad_change() {
        let mut doc = TestDocument::new([FieldType::Uuid, FieldType::StaticString].to_vec());
        doc.get_docdef_mut()
            .add_index("field0".to_string(), IndexType::Unique);
        doc.start();
        let count = 5;
        let data = "data";
        let mut ids: HashSet<Uuid> = HashSet::new();
        while ids.len() < count {
            ids.insert(Uuid::new_v4());
        }
        let holder = ids.iter().last().unwrap().clone();
        let fholder: Field = holder.into();
        ids.remove(&holder);
        for id in ids.iter() {
            doc.populate([id.clone().into(), data.into()].to_vec());
        }
        let mut update = Update::new();
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(data);
        update.get_query_mut().add("field1".to_string(), calc);
        update
            .get_values_mut()
            .add_field("field0".to_string(), holder.clone());
        doc.send(update).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Error(err) => match err {
                MTTError::FieldDuplicate(key, field) => {
                    assert_eq!(key, "field0");
                    assert_eq!(field, &fholder);
                }
                _ => unreachable!("got {:?}: should have gotten an missing field", err),
            },
            _ => unreachable!("got {:?}: should have gotten an error", action),
        }
        let query = Query::new();
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), ids.len());
                for doc in data.iter() {
                    match doc.get_field("field0").unwrap() {
                        Field::Uuid(id) => assert!(ids.contains(&id)),
                        _ => unreachable!("did not get uuid"),
                    }
                }
            }
            _ => unreachable!("got {:?}: should have gotten reply", action),
        }
    }

    #[test]
    fn can_calculate_field_values() {
        let mut doc = TestDocument::new([FieldType::DateTime].to_vec());
        doc.start();
        let duration = Duration::from_secs(300);
        let mut calc = Calculation::new(Operand::Add);
        calc.add_value(FieldType::DateTime).unwrap();
        calc.add_value(duration.clone()).unwrap();
        let mut addition = Addition::new();
        addition.add_field("field0".to_string(), calc);
        let start = Utc::now() + duration;
        doc.send(addition).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let stop = Utc::now() + duration;
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), 1);
                for doc in data.iter() {
                    match doc.get_field("field0").unwrap() {
                        Field::DateTime(datetime) => assert!(datetime > start && datetime < stop),
                        _ => unreachable!("did not get uuid"),
                    }
                }
            }
            _ => unreachable!("got {:?}: should have gotten reply", action),
        }
    }

    #[test]
    fn can_delete() {
        let mut doc = TestDocument::new([FieldType::Integer].to_vec());
        doc.start();
        doc.populate([1.into()].to_vec());
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(1);
        let mut query = Query::new();
        query.add("field0".to_string(), calc);
        let mut delete = Delete::new();
        *delete.get_query_mut() = query.clone();
        doc.send(delete).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), 1);
                for doc in data.iter() {
                    match doc.get_field("field0").unwrap() {
                        Field::Integer(num) => assert_eq!(num, 1),
                        _ => unreachable!("did not get uuid"),
                    }
                }
            }
            _ => unreachable!("got {:?}: should have gotten reply", action),
        }
        doc.send(query).unwrap();
        let result = doc.get_receiver().recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        match action {
            MsgAction::Reply(data) => assert_eq!(data.len(), 0),
            _ => unreachable!("did not get uuid"),
        }
    }

    #[test]
    #[ignore]
    fn delete_should_only_respond_to_its_own() {
        let mut doc = TestDocument::new([FieldType::Integer].to_vec());
        doc.start();
        doc.populate([1.into()].to_vec());
        let mut calc = Calculation::new(Operand::Equal);
        calc.add_value(1);
        let mut query = Query::new();
        query.add("field0".to_string(), calc);
        let mut delete = Delete::new();
        *delete.get_query_mut() = query.clone();
        doc.send(delete).unwrap();
        let name = "other";
        let msg = Message::new(name.to_string(), MsgAction::Show);
        let (tx, _) = channel();
        let mut queue = doc.get_queue();
        queue.register(tx, name.to_string(), Vec::new()).unwrap();
        queue.send(msg).unwrap();
        match doc.get_receiver().recv_timeout(TIMEOUT) {
            Ok(msg) => unreachable!("should not receive: {:?}", msg),
            Err(err) => match err {
                RecvTimeoutError::Timeout => {}
                _ => unreachable!("should have timed out"),
            },
        }
    }
}

#[cfg(test)]
mod createdocs {
    use super::support_test::TIMEOUT;
    use super::*;

    fn setup_create_doc(routes: Vec<RouteRequest>) -> (Queue, Receiver<Message>) {
        let mut queue = Queue::new();
        let (tx, rx) = channel();
        queue
            .register(tx, Uuid::new_v4().to_string(), routes)
            .unwrap();
        CreateDoc::start(queue.clone());
        (queue, rx)
    }

    #[test]
    fn create_document_creation() {
        let name = "project";
        let routes = [RouteRequest::new(
            Include::All,
            Include::All,
            Include::Some(Action::Reply),
        )]
        .to_vec();
        let (queue, rx) = setup_create_doc(routes);
        let msg1 = Message::new(name, MsgAction::Create(DocDef::new()));
        queue.send(msg1.clone()).unwrap();
        let result1 = rx.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result1.get_message_id(), msg1.get_message_id());
        assert_eq!(result1.get_document_id(), msg1.get_document_id());
        match result1.get_action() {
            MsgAction::Reply(_) => {}
            _ => unreachable!("got {:?}: should have been a reply.", result1.get_action()),
        }
        let msg2 = Message::new(name, MsgAction::Query(Query::new()));
        queue.send(msg2.clone()).unwrap();
        let result2 = rx.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result2.get_message_id(), msg2.get_message_id());
        assert_eq!(result2.get_document_id(), msg2.get_document_id());
        match result2.get_action() {
            MsgAction::Reply(_) => {}
            _ => unreachable!("got {:?}: should have been a reply.", result1.get_action()),
        }
    }

    #[test]
    fn does_duplicates_generate_error() {
        let name = "duplicate";
        let routes = [
            RouteRequest::new(Include::All, Include::All, Include::Some(Action::Reply)),
            RouteRequest::new(Include::All, Include::All, Include::Some(Action::Error)),
        ]
        .to_vec();
        let (queue, rx) = setup_create_doc(routes);
        let msg = Message::new(name, MsgAction::Create(DocDef::new()));
        queue.send(msg.clone()).unwrap();
        rx.recv_timeout(TIMEOUT).unwrap();
        queue.send(msg.clone()).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        assert_eq!(result.get_message_id(), msg.get_message_id());
        assert_eq!(result.get_document_id(), msg.get_document_id());
        match result.get_action() {
            MsgAction::Error(err) => match err {
                MTTError::DocumentAlreadyExists(data) => assert_eq!(data, name),
                _ => unreachable!("got {:?}: should have been a reply.", err),
            },
            _ => unreachable!("got {:?}: should have been a reply.", result.get_action()),
        }
    }
}