import { CharacterLayer, ExSocketInterface } from "../Model/Websocket/ExSocketInterface"; //TODO fix import by "_Model/.."
import { GameRoomPolicyTypes } from "../Model/PusherRoom";
import { PointInterface } from "../Model/Websocket/PointInterface";
import {
    SetPlayerDetailsMessage,
    SubMessage,
    BatchMessage,
    ItemEventMessage,
    ViewportMessage,
    ClientToServerMessage,
    SilentMessage,
    WebRtcSignalToServerMessage,
    PlayGlobalMessage,
    ReportPlayerMessage,
    QueryJitsiJwtMessage,
    SendUserMessage,
    ServerToClientMessage,
    CompanionMessage,
    EmotePromptMessage,
    VariableMessage,
} from "../Messages/generated/messages_pb";
import { UserMovesMessage } from "../Messages/generated/messages_pb";
import { TemplatedApp } from "uWebSockets.js";
import { parse } from "query-string";
import { jwtTokenManager, tokenInvalidException } from "../Services/JWTTokenManager";
import { adminApi, FetchMemberDataByUuidResponse } from "../Services/AdminApi";
import { SocketManager, socketManager } from "../Services/SocketManager";
import { emitInBatch } from "../Services/IoSocketHelpers";
import { ADMIN_SOCKETS_TOKEN, ADMIN_API_URL, DISABLE_ANONYMOUS, SOCKET_IDLE_TIMER } from "../Enum/EnvironmentVariable";
import { Zone } from "_Model/Zone";
import { ExAdminSocketInterface } from "_Model/Websocket/ExAdminSocketInterface";
import { CharacterTexture } from "../Services/AdminApi/CharacterTexture";
import log from "../Services/Logger";

export class IoSocketController {
    private nextUserId: number = 1;

    constructor(private readonly app: TemplatedApp) {
        this.ioConnection();
        this.adminRoomSocket();
    }

    adminRoomSocket() {
        this.app.ws("/admin/rooms", {
            upgrade: (res, req, context) => {
                const query = parse(req.getQuery());
                const websocketKey = req.getHeader("sec-websocket-key");
                const websocketProtocol = req.getHeader("sec-websocket-protocol");
                const websocketExtensions = req.getHeader("sec-websocket-extensions");
                const token = query.token;
                let authorizedRoomIds: string[];
                try {
                    const data = jwtTokenManager.verifyAdminSocketToken(token as string);
                    authorizedRoomIds = data.authorizedRoomIds;
                } catch (e) {
                    log.info("Admin access refused for token: " + token);
                    res.writeStatus("401 Unauthorized").end("Incorrect token");
                    return;
                }
                const roomId = query.roomId;
                if (typeof roomId !== "string" || !authorizedRoomIds.includes(roomId)) {
                    log.error("Invalid room id");
                    res.writeStatus("403 Bad Request").end("Invalid room id");
                    return;
                }

                res.upgrade({ roomId }, websocketKey, websocketProtocol, websocketExtensions, context);
            },
            open: (ws) => {
                log.info("Admin socket connect for room: " + ws.roomId);
                ws.disconnecting = false;

                socketManager.handleAdminRoom(ws as ExAdminSocketInterface, ws.roomId as string);
            },
            message: (ws, arrayBuffer, isBinary): void => {
                try {
                    //TODO refactor message type and data
                    const message: { event: string; message: { type: string; message: unknown; userUuid: string } } =
                        JSON.parse(new TextDecoder("utf-8").decode(new Uint8Array(arrayBuffer)));

                    if (message.event === "user-message") {
                        const messageToEmit = message.message as { message: string; type: string; userUuid: string };
                        if (messageToEmit.type === "banned") {
                            socketManager.emitBan(
                                messageToEmit.userUuid,
                                messageToEmit.message,
                                messageToEmit.type,
                                ws.roomId as string
                            );
                        }
                        if (messageToEmit.type === "ban") {
                            socketManager.emitSendUserMessage(
                                messageToEmit.userUuid,
                                messageToEmit.message,
                                messageToEmit.type,
                                ws.roomId as string
                            );
                        }
                    }
                } catch (err) {
                    log.error(err);
                }
            },
            close: (ws, code, message) => {
                const Client = ws as ExAdminSocketInterface;
                try {
                    Client.disconnecting = true;
                    socketManager.leaveAdminRoom(Client);
                } catch (e) {
                    log.error('An error occurred on admin "disconnect"');
                    log.error(e);
                }
            },
        });
    }

    ioConnection() {
        this.app.ws("/room", {
            /* Options */
            //compression: uWS.SHARED_COMPRESSOR,
            idleTimeout: SOCKET_IDLE_TIMER,
            maxPayloadLength: 16 * 1024 * 1024,
            maxBackpressure: 65536, // Maximum 64kB of data in the buffer.
            //idleTimeout: 10,
            upgrade: (res, req, context) => {
                (async () => {
                    /* Keep track of abortions */
                    const upgradeAborted = { aborted: false };

                    res.onAborted(() => {
                        /* We can simply signal that we were aborted */
                        upgradeAborted.aborted = true;
                    });

                    const url = req.getUrl();
                    const query = parse(req.getQuery());
                    const websocketKey = req.getHeader("sec-websocket-key");
                    const websocketProtocol = req.getHeader("sec-websocket-protocol");
                    const websocketExtensions = req.getHeader("sec-websocket-extensions");
                    const IPAddress = req.getHeader("x-forwarded-for");

                    const roomId = query.roomId;
                    try {
                        if (typeof roomId !== "string") {
                            throw new Error("Undefined room ID: ");
                        }

                        const token = query.token;
                        const x = Number(query.x);
                        const y = Number(query.y);
                        const top = Number(query.top);
                        const bottom = Number(query.bottom);
                        const left = Number(query.left);
                        const right = Number(query.right);
                        const name = query.name;

                        let companion: CompanionMessage | undefined = undefined;

                        if (typeof query.companion === "string") {
                            companion = new CompanionMessage();
                            companion.setName(query.companion);
                        }

                        if (typeof name !== "string") {
                            throw new Error("Expecting name");
                        }
                        if (name === "") {
                            throw new Error("No empty name");
                        }
                        let characterLayers = query.characterLayers;
                        if (characterLayers === null) {
                            throw new Error("Expecting skin");
                        }
                        if (typeof characterLayers === "string") {
                            characterLayers = [characterLayers];
                        }

                        const tokenData =
                            token && typeof token === "string" ? jwtTokenManager.verifyJWTToken(token) : null;

                        if (DISABLE_ANONYMOUS && !tokenData) {
                            throw new Error("Expecting token");
                        }

                        const userIdentifier = tokenData ? tokenData.identifier : "";

                        let memberTags: string[] = [];
                        let memberVisitCardUrl: string | null = null;
                        let memberMessages: unknown;
                        let memberTextures: CharacterTexture[] = [];
                        const room = await socketManager.getOrCreateRoom(roomId);
                        let userData: FetchMemberDataByUuidResponse = {
                            email: userIdentifier,
                            userUuid: userIdentifier,
                            tags: [],
                            visitCardUrl: null,
                            textures: [],
                            messages: [],
                            anonymous: true,
                        };
                        if (ADMIN_API_URL) {
                            try {
                                try {
                                    userData = await adminApi.fetchMemberDataByUuid(userIdentifier, roomId, IPAddress);
                                } catch (err) {
                                    if (err?.response?.status == 404) {
                                        // If we get an HTTP 404, the token is invalid. Let's perform an anonymous login!

                                        log.warn(
                                            'Cannot find user with email "' +
                                                (userIdentifier || "anonymous") +
                                                '". Performing an anonymous login instead.'
                                        );
                                    } else if (err?.response?.status == 403) {
                                        // If we get an HTTP 403, the world is full. We need to broadcast a special error to the client.
                                        // we finish immediately the upgrade then we will close the socket as soon as it starts opening.
                                        return res.upgrade(
                                            {
                                                rejected: true,
                                                message: err?.response?.data.message,
                                                status: err?.response?.status,
                                            },
                                            websocketKey,
                                            websocketProtocol,
                                            websocketExtensions,
                                            context
                                        );
                                    } else {
                                        throw err;
                                    }
                                }
                                memberMessages = userData.messages;
                                memberTags = userData.tags;
                                memberVisitCardUrl = userData.visitCardUrl;
                                memberTextures = userData.textures;
                                if (
                                    room.policyType === GameRoomPolicyTypes.USE_TAGS_POLICY &&
                                    (userData.anonymous === true || !room.canAccess(memberTags))
                                ) {
                                    throw new Error("Insufficient privileges to access this room");
                                }
                                if (
                                    room.policyType === GameRoomPolicyTypes.MEMBERS_ONLY_POLICY &&
                                    userData.anonymous === true
                                ) {
                                    throw new Error("Use the login URL to connect");
                                }
                            } catch (e) {
                                log.info(
                                    "access not granted for user " +
                                        (userIdentifier || "anonymous") +
                                        " and room " +
                                        roomId
                                );
                                log.error(e);
                                throw new Error("User cannot access this world");
                            }
                        }

                        // Generate characterLayers objects from characterLayers string[]
                        const characterLayerObjs: CharacterLayer[] =
                            SocketManager.mergeCharacterLayersAndCustomTextures(characterLayers, memberTextures);

                        if (upgradeAborted.aborted) {
                            log.info("Ouch! Client disconnected before we could upgrade it!");
                            /* You must not upgrade now */
                            return;
                        }

                        /* This immediately calls open handler, you must not use res after this call */
                        res.upgrade(
                            {
                                // Data passed here is accessible on the "websocket" socket object.
                                url,
                                token,
                                userUuid: userData.userUuid,
                                IPAddress,
                                roomId,
                                name,
                                companion,
                                characterLayers: characterLayerObjs,
                                messages: memberMessages,
                                tags: memberTags,
                                visitCardUrl: memberVisitCardUrl,
                                textures: memberTextures,
                                position: {
                                    x: x,
                                    y: y,
                                    direction: "down",
                                    moving: false,
                                } as PointInterface,
                                viewport: {
                                    top,
                                    right,
                                    bottom,
                                    left,
                                },
                            },
                            /* Spell these correctly */
                            websocketKey,
                            websocketProtocol,
                            websocketExtensions,
                            context
                        );
                    } catch (e) {
                        res.upgrade(
                            {
                                rejected: true,
                                reason: e.reason || null,
                                message: e.message ? e.message : "500 Internal Server Error",
                            },
                            websocketKey,
                            websocketProtocol,
                            websocketExtensions,
                            context
                        );
                    }
                })();
            },
            /* Handlers */
            open: (ws) => {
                if (ws.rejected === true) {
                    //FIX ME to use status code
                    if (ws.reason === tokenInvalidException) {
                        socketManager.emitTokenExpiredMessage(ws);
                    } else if (ws.message === "World is full") {
                        socketManager.emitWorldFullMessage(ws);
                    } else {
                        socketManager.emitConnexionErrorMessage(ws, ws.message as string);
                    }
                    setTimeout(() => ws.close(), 0);
                    return;
                }

                // Let's join the room
                const client = this.initClient(ws);
                socketManager.handleJoinRoom(client);

                //get data information and show messages
                if (client.messages && Array.isArray(client.messages)) {
                    client.messages.forEach((c: unknown) => {
                        const messageToSend = c as { type: string; message: string };

                        const sendUserMessage = new SendUserMessage();
                        sendUserMessage.setType(messageToSend.type);
                        sendUserMessage.setMessage(messageToSend.message);

                        const serverToClientMessage = new ServerToClientMessage();
                        serverToClientMessage.setSendusermessage(sendUserMessage);

                        if (!client.disconnecting) {
                            client.send(serverToClientMessage.serializeBinary().buffer, true);
                        }
                    });
                }
            },
            message: (ws, arrayBuffer, isBinary): void => {
                const client = ws as ExSocketInterface;
                const message = ClientToServerMessage.deserializeBinary(new Uint8Array(arrayBuffer));

                if (message.hasViewportmessage()) {
                    socketManager.handleViewport(client, (message.getViewportmessage() as ViewportMessage).toObject());
                } else if (message.hasUsermovesmessage()) {
                    socketManager.handleUserMovesMessage(client, message.getUsermovesmessage() as UserMovesMessage);
                } else if (message.hasSetplayerdetailsmessage()) {
                    socketManager.handleSetPlayerDetails(
                        client,
                        message.getSetplayerdetailsmessage() as SetPlayerDetailsMessage
                    );
                } else if (message.hasSilentmessage()) {
                    socketManager.handleSilentMessage(client, message.getSilentmessage() as SilentMessage);
                } else if (message.hasItemeventmessage()) {
                    socketManager.handleItemEvent(client, message.getItemeventmessage() as ItemEventMessage);
                } else if (message.hasVariablemessage()) {
                    socketManager.handleVariableEvent(client, message.getVariablemessage() as VariableMessage);
                } else if (message.hasWebrtcsignaltoservermessage()) {
                    socketManager.emitVideo(
                        client,
                        message.getWebrtcsignaltoservermessage() as WebRtcSignalToServerMessage
                    );
                } else if (message.hasWebrtcscreensharingsignaltoservermessage()) {
                    socketManager.emitScreenSharing(
                        client,
                        message.getWebrtcscreensharingsignaltoservermessage() as WebRtcSignalToServerMessage
                    );
                } else if (message.hasPlayglobalmessage()) {
                    socketManager.emitPlayGlobalMessage(client, message.getPlayglobalmessage() as PlayGlobalMessage);
                } else if (message.hasReportplayermessage()) {
                    socketManager.handleReportMessage(client, message.getReportplayermessage() as ReportPlayerMessage);
                } else if (message.hasQueryjitsijwtmessage()) {
                    socketManager.handleQueryJitsiJwtMessage(
                        client,
                        message.getQueryjitsijwtmessage() as QueryJitsiJwtMessage
                    );
                } else if (message.hasEmotepromptmessage()) {
                    socketManager.handleEmotePromptMessage(
                        client,
                        message.getEmotepromptmessage() as EmotePromptMessage
                    );
                }

                /* Ok is false if backpressure was built up, wait for drain */
                //let ok = ws.send(message, isBinary);
            },
            drain: (ws) => {
                log.info("WebSocket backpressure: " + ws.getBufferedAmount());
            },
            close: (ws, code, message) => {
                const Client = ws as ExSocketInterface;
                try {
                    Client.disconnecting = true;
                    //leave room
                    socketManager.leaveRoom(Client);
                } catch (e) {
                    log.error('An error occurred on "disconnect"');
                    log.error(e);
                }
            },
        });
    }

    //eslint-disable-next-line @typescript-eslint/no-explicit-any
    private initClient(ws: any): ExSocketInterface {
        const client: ExSocketInterface = ws;
        client.userId = this.nextUserId;
        this.nextUserId++;
        client.userUuid = ws.userUuid;
        client.IPAddress = ws.IPAddress;
        client.token = ws.token;
        client.batchedMessages = new BatchMessage();
        client.batchTimeout = null;
        client.emitInBatch = (payload: SubMessage): void => {
            emitInBatch(client, payload);
        };
        client.disconnecting = false;

        client.messages = ws.messages;
        client.name = ws.name;
        client.tags = ws.tags;
        client.visitCardUrl = ws.visitCardUrl;
        client.textures = ws.textures;
        client.characterLayers = ws.characterLayers;
        client.companion = ws.companion;
        client.roomId = ws.roomId;
        client.listenedZones = new Set<Zone>();
        return client;
    }
}