use std::{
    collections::HashMap,
    sync::{
        mpsc::{channel, Receiver, Sender},
        Arc, RwLock,
    },
    thread::spawn,
};
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),
    DocumentFieldMissing(String),
    DocumentFieldNotFound(String),
    DocumentFieldWrongDataType(FieldType, FieldType),
    DocumentNotFound(String),
}

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

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

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),
}

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),
    Reply(Reply),
    Show,
    // Delete
}

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

    fn reply(&self, resp: Reply) -> Self {
        Self {
            msg_id: self.msg_id.clone(),
            document_id: self.document_id.clone(),
            action: MsgAction::Reply(resp),
        }
    }

    fn error(&self, err: MTTError) -> Self {
        Self {
            msg_id: self.msg_id.clone(),
            document_id: self.document_id.clone(),
            action: MsgAction::Error(err),
        }
    }
}

#[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::ID(_) => unreachable!("should have been a string id"),
                NameID::Name(data) => assert_eq!(data, document),
            }
            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::ID(_) => unreachable!("should have been a string id"),
                NameID::Name(data) => assert_eq!(data, &document),
            }
            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),
            NameID::Name(_) => 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.reply(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.error(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)]
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, 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)]
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(),
        };
        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());
    }
}

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

impl Queue {
    fn new() -> Self {
        Self {
            queue_data: Arc::new(RwLock::new(QueueData::new())),
        }
    }

    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)
    }

    fn send(&self, msg: Message) -> Result<(), MTTError> {
        let queuedata = self.queue_data.read().unwrap();
        queuedata.send(msg)
    }
}

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

    #[test]
    fn create_a_queue() {
        Queue::new();
    }
}

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 {
    StaticString,
    Uuid,
}

impl FieldType {
    fn get_default(&self) -> Field {
        match self {
            FieldType::StaticString => "".into(),
            FieldType::Uuid => Uuid::new_v4().into(),
        }
    }
}

impl From<&Field> for FieldType {
    fn from(value: &Field) -> Self {
        match value {
            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, PartialEq)]
enum Field {
    StaticString(String),
    Uuid(Uuid),
}

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

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)
    }
}

#[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);
    }
}

#[derive(Clone, Debug)]
struct FieldSetting {
    fieldtype: FieldType,
}

impl FieldSetting {
    fn new(ftype: FieldType) -> Self {
        Self { fieldtype: ftype }
    }

    fn get_type(&self) -> &FieldType {
        &self.fieldtype
    }
}

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

    #[test]
    fn can_field_type_be_assigned() {
        let ftypes = [FieldType::StaticString, FieldType::Uuid];
        for ftype in ftypes.into_iter() {
            let fieldinfo = FieldSetting::new(ftype.clone());
            assert_eq!(fieldinfo.get_type(), &ftype);
        }
    }
}

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

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

    fn add_field<F>(&mut self, name: String, field: F)
    where
        F: Into<Field>,
    {
        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"),
        }
    }
}

type DocDefMap = HashMap<String, FieldSetting>;

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

impl DocDef {
    fn new() -> Self {
        Self {
            fields: 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 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();
        assert_eq!(result.get_type(), &field_type);
    }

    #[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();
            assert_eq!(result.get_type(), &field_type);
        }
    }
}

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

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

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

#[derive(Clone, Debug)]
struct Query {
    specifiers: Vec<Specifier>,
}

impl Query {
    fn new() -> Self {
        Self {
            specifiers: Vec::new(),
        }
    }

    fn add_specifier<F>(&mut self, name: String, op: Operand, value: F)
    where
        F: Into<Field>,
    {
        let spec = Specifier::new(name, op, value);
        self.specifiers.push(spec);
    }

    fn run(&self, docs: &DocumentFile) -> Result<Reply, MTTError> {
        let mut reply = Reply::new();
        let docdef = docs.get_docdef();
        for specifier in self.specifiers.iter() {
            match docdef.get_field(&specifier.field_name) {
                Ok(spec) => {
                    let value_type: FieldType = (&specifier.value).into();
                    let wanted_type = spec.get_type();
                    if &value_type != wanted_type {
                        return Err(MTTError::DocumentFieldWrongDataType(
                            wanted_type.clone(),
                            value_type.clone(),
                        ));
                    }
                }
                Err(err) => return Err(err),
            }
        }
        for doc in docs.get_documents() {
            let mut output = true;
            for specifier in self.specifiers.iter() {
                let value = doc.get_field(&specifier.field_name).unwrap();
                if value != &specifier.value {
                    output = false;
                }
            }
            if output {
                reply.add(doc.clone());
            }
        }
        Ok(reply)
    }
}

#[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"),
        }
    }
}

type DocumentMap = HashMap<String, Field>;

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

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

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

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

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

#[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),
        }
    }
}

struct DocumentFile {
    docdef: DocDef,
    docs: Vec<Document>,
    queue: Queue,
    rx: Receiver<Message>,
}

impl DocumentFile {
    fn new(queue: Queue, rx: Receiver<Message>, docdef: DocDef) -> Self {
        Self {
            docdef: docdef,
            docs: Vec::new(),
            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(),
        };
        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::Query),
            ),
            RouteRequest::new(
                Include::All,
                Include::Some(name.clone()),
                Include::Some(Action::Show),
            ),
        ]
        .to_vec();
        match queue.register(tx, name, routes) {
            Ok(_) => {}
            Err(err) => {
                let error = msg.error(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.reply(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::Query(query) => self.query(query),
                _ => 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 = &Document> {
        self.docs.iter()
    }

    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.docdef.get_field(&key) {
                Err(err) => return err.into(),
                Ok(field_info) => {
                    if field_info.get_type() == &value.get_type() {
                        holder.add_field(key.clone(), value.clone());
                    } else {
                        return MTTError::DocumentFieldWrongDataType(
                            value.get_type(),
                            field_info.get_type().clone(),
                        )
                        .into();
                    }
                }
            }
        }
        for (key, _) in self.docdef.iter() {
            match holder.get_field(key) {
                Some(_) => {}
                None => return MTTError::DocumentFieldMissing(key.clone()).into(),
            }
        }
        self.docs.push(holder.clone());
        let mut reply = Reply::new();
        reply.add(holder);
        reply.into()
    }

    fn query(&self, query: &Query) -> MsgAction {
        match query.run(self) {
            Ok(reply) => reply.into(),
            Err(err) => err.into(),
        }
    }
}

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

    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 {
        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
    }

    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 doc_name = "mismatch";
        let field_name = Uuid::new_v4().to_string();
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid].to_vec()),
            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 doc_name = "mismatch";
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid].to_vec()),
            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(found, expected) => {
                    assert_eq!(found, &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 doc_name = "missing";
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid, FieldType::Uuid].to_vec()),
            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 doc_name = "query";
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid, FieldType::Uuid].to_vec()),
            standard_routes(),
        );
        let field0 = Uuid::new_v4();
        let field1 = Uuid::new_v4();
        for _ in 0..3 {
            let mut addition = Addition::new();
            addition.add_field("field0".to_string(), Uuid::new_v4());
            addition.add_field("field1".to_string(), Uuid::new_v4());
            let msg = Message::new(doc_name, addition);
            queue.send(msg).unwrap();
            rx.recv_timeout(TIMEOUT).unwrap();
        }
        let mut addition = Addition::new();
        addition.add_field("field0".to_string(), field0.clone());
        addition.add_field("field1".to_string(), field1.clone());
        let msg = Message::new(doc_name, addition);
        queue.send(msg).unwrap();
        rx.recv_timeout(TIMEOUT).unwrap();
        for _ in 0..3 {
            let mut addition = Addition::new();
            addition.add_field("field0".to_string(), Uuid::new_v4());
            addition.add_field("field1".to_string(), Uuid::new_v4());
            let msg = Message::new(doc_name, addition);
            queue.send(msg).unwrap();
            rx.recv_timeout(TIMEOUT).unwrap();
        }
        let mut query = Query::new();
        query.add_specifier("field0".to_string(), Operand::Equal, field0.clone());
        let msg = Message::new(doc_name, query);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        let field0: Field = field0.into();
        let field1: Field = field1.into();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), 1, "should return one entry");
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), &field0);
                    assert_eq!(doc.get_field("field1").unwrap(), &field1);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn gets_all_documents_in_query() {
        let doc_name = "multiple";
        let count = 4;
        let input = Uuid::new_v4();
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid].to_vec()),
            standard_routes(),
        );
        for _ in 0..3 {
            let mut addition = Addition::new();
            addition.add_field("field0".to_string(), Uuid::new_v4());
            let msg = Message::new(doc_name, addition);
            queue.send(msg).unwrap();
            rx.recv_timeout(TIMEOUT).unwrap();
        }
        for _ in 0..count {
            let mut addition = Addition::new();
            addition.add_field("field0".to_string(), input.clone());
            let msg = Message::new(doc_name, addition);
            queue.send(msg).unwrap();
            rx.recv_timeout(TIMEOUT).unwrap();
        }
        let mut query = Query::new();
        query.add_specifier("field0".to_string(), Operand::Equal, input.clone());
        let msg = Message::new(doc_name, query);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        let input: Field = input.into();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), count, "should return {} entries", count);
                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 doc_name = "onlyone";
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid, FieldType::Uuid].to_vec()),
            standard_routes(),
        );
        let field0 = Uuid::new_v4();
        let field1 = Uuid::new_v4();
        let input = [
            [Uuid::new_v4(), Uuid::new_v4()],
            [field0.clone(), field1.clone()],
            [field1.clone(), field0.clone()],
            [field0.clone(), Uuid::new_v4()],
            [Uuid::new_v4(), field1.clone()],
        ];
        for combo in input.iter() {
            let mut addition = Addition::new();
            addition.add_field("field0".to_string(), combo[0].clone());
            addition.add_field("field1".to_string(), combo[1].clone());
            let msg = Message::new(doc_name, addition);
            queue.send(msg).unwrap();
            rx.recv_timeout(TIMEOUT).unwrap();
        }
        let mut query = Query::new();
        query.add_specifier("field0".to_string(), Operand::Equal, field0.clone());
        query.add_specifier("field1".to_string(), Operand::Equal, field1.clone());
        let msg = Message::new(doc_name, query);
        queue.send(msg).unwrap();
        let result = rx.recv_timeout(TIMEOUT).unwrap();
        let action = result.get_action();
        let field0: Field = field0.into();
        let field1: Field = field1.into();
        match action {
            MsgAction::Reply(data) => {
                assert_eq!(data.len(), 1, "should return one entry");
                for doc in data.iter() {
                    assert_eq!(doc.get_field("field0").unwrap(), &field0);
                    assert_eq!(doc.get_field("field1").unwrap(), &field1);
                }
            }
            _ => unreachable!("got {:?}: should have been a reply", action),
        }
    }

    #[test]
    fn errors_on_bad_field_name() {
        let doc_name = "testing";
        let field_name = "wrong";
        let (queue, rx) = test_doc(doc_name, create_docdef(Vec::new()), standard_routes());
        let mut query = Query::new();
        query.add_specifier(field_name.to_string(), Operand::Equal, Uuid::new_v4());
        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 doc_name = "testing";
        let (queue, rx) = test_doc(
            doc_name,
            create_docdef([FieldType::Uuid].to_vec()),
            standard_routes(),
        );
        let mut query = Query::new();
        query.add_specifier("field0".to_string(), Operand::Equal, "wrong");
        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::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),
        }
    }
}

#[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()),
        }
    }
}