import {IRoomManagerServer} from "./Messages/generated/messages_grpc_pb";
import {
    AdminGlobalMessage,
    AdminMessage,
    AdminPusherToBackMessage,
    AdminRoomMessage,
    BanMessage,
    EmptyMessage,
    ItemEventMessage,
    JoinRoomMessage,
    PlayGlobalMessage,
    PusherToBackMessage,
    QueryJitsiJwtMessage,
    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}) => {
                            room = gameRoom;
                            user = 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.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());
    },
};

export {roomManager};