import { IRoomManagerServer } from "./Messages/generated/messages_grpc_pb";
import {
    AdminGlobalMessage,
    AdminMessage,
    AdminPusherToBackMessage,
    AdminRoomMessage,
    BanMessage,
    EmotePromptMessage,
    EmptyMessage,
    ItemEventMessage,
    JoinRoomMessage,
    PlayGlobalMessage,
    PusherToBackMessage,
    QueryJitsiJwtMessage,
    RefreshRoomPromptMessage,
    ServerToAdminClientMessage,
    ServerToClientMessage,
    SilentMessage,
    UserMovesMessage,
    WebRtcSignalToServerMessage,
    WorldFullWarningToRoomMessage,
    ZoneMessage,
} from "./Messages/generated/messages_pb";
import { sendUnaryData, ServerDuplexStream, ServerUnaryCall, ServerWritableStream } from "grpc";
import { socketManager } from "./Services/SocketManager";
import { emitError } from "./Services/MessageHelpers";
import { User, UserSocket } from "./Model/User";
import { GameRoom } from "./Model/GameRoom";
import Debug from "debug";
import { Admin } from "./Model/Admin";

const debug = Debug("roommanager");

export type AdminSocket = ServerDuplexStream<AdminPusherToBackMessage, ServerToAdminClientMessage>;
export type ZoneSocket = ServerWritableStream<ZoneMessage, ServerToClientMessage>;

const roomManager: IRoomManagerServer = {
    joinRoom: (call: UserSocket): void => {
        console.log("joinRoom called");

        let room: GameRoom | null = null;
        let user: User | null = null;

        call.on("data", (message: PusherToBackMessage) => {
            try {
                if (room === null || user === null) {
                    if (message.hasJoinroommessage()) {
                        socketManager
                            .handleJoinRoom(call, message.getJoinroommessage() as JoinRoomMessage)
                            .then(({ room: gameRoom, user: myUser }) => {
                                if (call.writable) {
                                    room = gameRoom;
                                    user = myUser;
                                } else {
                                    //Connexion may have been closed before the init was finished, so we have to manually disconnect the user.
                                    socketManager.leaveRoom(gameRoom, myUser);
                                }
                            });
                    } else {
                        throw new Error("The first message sent MUST be of type JoinRoomMessage");
                    }
                } else {
                    if (message.hasJoinroommessage()) {
                        throw new Error("Cannot call JoinRoomMessage twice!");
                    } else if (message.hasUsermovesmessage()) {
                        socketManager.handleUserMovesMessage(
                            room,
                            user,
                            message.getUsermovesmessage() as UserMovesMessage
                        );
                    } else if (message.hasSilentmessage()) {
                        socketManager.handleSilentMessage(room, user, message.getSilentmessage() as SilentMessage);
                    } else if (message.hasItemeventmessage()) {
                        socketManager.handleItemEvent(room, user, message.getItemeventmessage() as ItemEventMessage);
                    } else if (message.hasWebrtcsignaltoservermessage()) {
                        socketManager.emitVideo(
                            room,
                            user,
                            message.getWebrtcsignaltoservermessage() as WebRtcSignalToServerMessage
                        );
                    } else if (message.hasWebrtcscreensharingsignaltoservermessage()) {
                        socketManager.emitScreenSharing(
                            room,
                            user,
                            message.getWebrtcscreensharingsignaltoservermessage() as WebRtcSignalToServerMessage
                        );
                    } else if (message.hasPlayglobalmessage()) {
                        socketManager.emitPlayGlobalMessage(room, message.getPlayglobalmessage() as PlayGlobalMessage);
                    } else if (message.hasQueryjitsijwtmessage()) {
                        socketManager.handleQueryJitsiJwtMessage(
                            user,
                            message.getQueryjitsijwtmessage() as QueryJitsiJwtMessage
                        );
                    } else if (message.hasEmotepromptmessage()) {
                        socketManager.handleEmoteEventMessage(
                            room,
                            user,
                            message.getEmotepromptmessage() as EmotePromptMessage
                        );
                    } else if (message.hasSendusermessage()) {
                        const sendUserMessage = message.getSendusermessage();
                        if (sendUserMessage !== undefined) {
                            socketManager.handlerSendUserMessage(user, sendUserMessage);
                        }
                    } else if (message.hasBanusermessage()) {
                        const banUserMessage = message.getBanusermessage();
                        if (banUserMessage !== undefined) {
                            socketManager.handlerBanUserMessage(room, user, banUserMessage);
                        }
                    } else {
                        throw new Error("Unhandled message type");
                    }
                }
            } catch (e) {
                emitError(call, e);
                call.end();
            }
        });

        call.on("end", () => {
            debug("joinRoom ended");
            if (user !== null && room !== null) {
                socketManager.leaveRoom(room, user);
            }
            call.end();
            room = null;
            user = null;
        });

        call.on("error", (err: Error) => {
            console.error("An error occurred in joinRoom stream:", err);
        });
    },

    listenZone(call: ZoneSocket): void {
        debug("listenZone called");
        const zoneMessage = call.request;

        socketManager.addZoneListener(call, zoneMessage.getRoomid(), zoneMessage.getX(), zoneMessage.getY());

        call.on("cancelled", () => {
            debug("listenZone cancelled");
            socketManager.removeZoneListener(call, zoneMessage.getRoomid(), zoneMessage.getX(), zoneMessage.getY());
            call.end();
        });

        call.on("close", () => {
            debug("listenZone connection closed");
            socketManager.removeZoneListener(call, zoneMessage.getRoomid(), zoneMessage.getX(), zoneMessage.getY());
        }).on("error", (e) => {
            console.error("An error occurred in listenZone stream:", e);
            socketManager.removeZoneListener(call, zoneMessage.getRoomid(), zoneMessage.getX(), zoneMessage.getY());
            call.end();
        });
    },

    adminRoom(call: AdminSocket): void {
        console.log("adminRoom called");

        const admin = new Admin(call);
        let room: GameRoom | null = null;

        call.on("data", (message: AdminPusherToBackMessage) => {
            try {
                if (room === null) {
                    if (message.hasSubscribetoroom()) {
                        const roomId = message.getSubscribetoroom();
                        socketManager.handleJoinAdminRoom(admin, roomId).then((gameRoom: GameRoom) => {
                            room = gameRoom;
                        });
                    } else {
                        throw new Error("The first message sent MUST be of type JoinRoomMessage");
                    }
                }
            } catch (e) {
                emitError(call, e);
                call.end();
            }
        });

        call.on("end", () => {
            debug("joinRoom ended");
            if (room !== null) {
                socketManager.leaveAdminRoom(room, admin);
            }
            call.end();
            room = null;
        });

        call.on("error", (err: Error) => {
            console.error("An error occurred in joinAdminRoom stream:", err);
        });
    },
    sendAdminMessage(call: ServerUnaryCall<AdminMessage>, callback: sendUnaryData<EmptyMessage>): void {
        socketManager.sendAdminMessage(
            call.request.getRoomid(),
            call.request.getRecipientuuid(),
            call.request.getMessage()
        );

        callback(null, new EmptyMessage());
    },
    sendGlobalAdminMessage(call: ServerUnaryCall<AdminGlobalMessage>, callback: sendUnaryData<EmptyMessage>): void {
        throw new Error("Not implemented yet");
        // TODO
        callback(null, new EmptyMessage());
    },
    ban(call: ServerUnaryCall<BanMessage>, callback: sendUnaryData<EmptyMessage>): void {
        // FIXME Work in progress
        socketManager.banUser(call.request.getRoomid(), call.request.getRecipientuuid(), call.request.getMessage());

        callback(null, new EmptyMessage());
    },
    sendAdminMessageToRoom(call: ServerUnaryCall<AdminRoomMessage>, callback: sendUnaryData<EmptyMessage>): void {
        socketManager.sendAdminRoomMessage(call.request.getRoomid(), call.request.getMessage());
        callback(null, new EmptyMessage());
    },
    sendWorldFullWarningToRoom(
        call: ServerUnaryCall<WorldFullWarningToRoomMessage>,
        callback: sendUnaryData<EmptyMessage>
    ): void {
        socketManager.dispatchWorlFullWarning(call.request.getRoomid());
        callback(null, new EmptyMessage());
    },
    sendRefreshRoomPrompt(
        call: ServerUnaryCall<RefreshRoomPromptMessage>,
        callback: sendUnaryData<EmptyMessage>
    ): void {
        socketManager.dispatchRoomRefresh(call.request.getRoomid());
        callback(null, new EmptyMessage());
    },
};

export { roomManager };