const RemotePlayerMsgType = {
    MIN_USER_INPUT_MSG_ID: 0,
    MouseMove: 0,
    MouseDown: 1,
    MouseUp: 2,
    MouseWheel: 3,
    MouseDBClick: 4,
    WindowSize: 5,
    TouchDown: 6,
    TouchUp: 7,
    TouchMove: 8,
    Exit: 9,
    KeyDown: 10,
    KeyUp: 11,
    MAX_USER_INPUT_MSG_ID: 11,

    RELAY_JPG_REQ: 12,
}

// Check if Native app
window.isNativeApp = (typeof(qt) == "object" && qt.webChannelTransport);
if (window.isNativeApp)
{
    if ("undefined" != typeof QWebChannel) {
        window.NativeAppLoad = new Promise((resolve)=>{
            window.gWebChannel = new QWebChannel(qt.webChannelTransport, function (channel) {
                window.NativeApp = {};
                Object.assign(window.NativeApp, channel.objects);
                console.info("NativeApp Loaded");
                resolve();
            });
        });
    }
    else {
        console.warn("Link qwebchannel.js to enable native call");
        window.isNativeApp = false;
    }
}

function RemotePlayer(config)
{
    this.fileVersion = "For WIZPlayer 4.0.42+";
    
    let $self = this;

    // 配置检查
    config = config || {};

    if (!config.logger && config.debug) {
        const TimeToString = (t)=>{ return '['+t.toLocaleTimeString()+':'+t.getMilliseconds()+']'; };
        config.logger = {
            onRequest: function(cmdId, request, args) {
                let t = new Date();
                console.log(TimeToString(t) + ` NativeRequest:{"method": "${request}", "id":${cmdId}}`, args);
            },
            onResponse: function(cmdId, ret) {
                let t = new Date();
                console.log(TimeToString(t) + ` NativeResponse: {"id":${cmdId}}`, ret);
            },
            onConnectSignal: function(idx, signalName, callback) {
                console.log(TimeToString(new Date()) + ` signalConnect: {"method": "${signalName}", "id":${idx}}`, callback);
            },
            onDisconnectSignal: function(idx, signalName, callback) {
                console.log(TimeToString(new Date()) + ` signalDisconnect: {"method": "${signalName}", "id":${idx}}`, callback);
            },
            onSignal: function(signalName, args) {
                console.log(TimeToString(new Date()) + ` signalEmitted: {"method": "${signalName}"}`, args);
            }
        };
    }

     // 服务器地址
    config.signalServer = config.signalServer || "ws://localhost:8080";
    // 引擎ID
    config.engineId = config.engineId;
    // player要绑定的视频标签
    config.video = config.video || document.getElementsByTagName("video")[0];
    config.isImage = config.video.tagName == "IMG";
    config.video.style.transform = "rotateX(180deg)";
    // 是否启用自定义用户输入事件，启用则不监听视频标签上的鼠标、触屏事件，需要用户自行调用输入函数
    config.customInputEvent = config.customInputEvent ? true : false;
    // 自动调整引擎画面大小与绑定视频标签同步
    config.autoResize = config.autoResize ? true : false;
    // 限制用户每秒鼠标移动和触屏的事件个数，事件过多时操作不流畅，限制事件个数来提高操作流畅性
    config.limtMoveCPS = config.limtMoveCPS == undefined ? 10 : config.limtMoveCPS;
    // 用户操作超时时间，当用户鼠标或触屏在该时间内没有产生操作，将首次提示用户，在exitTimeout后将断开连接来节约云渲染资源
    config.userTimeout = isNaN(config.userTimeout) ? 1000 * 60 * 5 : config.userTimeout;
    // 用户操作超时后的延迟断开时间，首次提示后的将过该时间后断开连接，在真正断开前可取消resetTimer();
    config.exitTimeout = isNaN(config.exitTimeout) ? 1000 * 10 : config.exitTimeout;
    // 当前断开后引擎需要保持的时间
    config.maxTimeout = isNaN(config.maxTimeout) ? 0 : config.maxTimeout;

    $self.config = config;
    config.video.oncontextmenu = (e)=> { e.preventDefault() };

    $self.finishEventObjMap = {};
    $self.eventMap = {};
    $self.event = new Proxy({}, {
        set: (target, property, fn) => {
            this.eventMap[property] || (this.eventMap[property] = []);
            this.eventMap[property].push(fn);
            return true;
        }
    })

    $self.isNativeApp = false;
    if (window.NativeAppLoad)
    {
        $self.isNativeApp = true;
        $self.reconnect = ()=>{};
        window.NativeAppLoad.then(()=>{
            window.NativeApp.EngineMgr.create($self.config.engineId, { visible: false }, (objId)=>{
                $self.checkVideoPos = function() {
                    var p = $self.config.video.getBoundingClientRect();
                    var pos = [p.left, p.top];
                    window.NativeApp.EngineMgr.update($self.config.engineId, {pos: pos});
                };
                var p = $self.config.video.getBoundingClientRect();
                window.NativeApp.EngineMgr.update($self.config.engineId, { pos: [p.left, p.top], visible: true });
                var qtTransportWrap = { 
                    send: (msg) => {
                        qt.webChannelTransport.send(msg);
                    }
                };
                new QWebChannel(qtTransportWrap, function (channel) {
                    $self.Native = channel.objects[objId];
                    $self.objects = channel.objects;
                    window.NativeApp = {}
                    window.webchannelDebug = $self.config.debug;
                    Object.assign(window.NativeApp, channel.objects);
                    if ($self.Native.ControlChannel) {
                        $self._controlChannel = {
                            send: (buffer) => {
                                var str = window.btoa(String.fromCharCode(...new Uint8Array(buffer)));
                                $self.Native.ControlChannel.send(str);
                            }
                        };
                    }
                    else {
                        console.warn("Native not has ControlChannel");
                    }
                    console.info("Engine Native Loaded");
                    $self.finishEventObjMap["NativeLoad"] = $self.Native;
                    $self.emit("NativeLoad", $self.Native);
                }, $self.config.logger);
            });
        });
    }
    else {

        $self._ws = null;
        $self._pc = null;
        
        $self.resetTimer = function() {
            if ($self._pc && !$self.exited) {
                clearTimeout($self._userTimer);
                $self._userTimer = setTimeout(()=> {
                    $self._userTimer = setTimeout(()=> {
                        if (!$self.exited) {
                            $self.exit();
                            console.log(`长时间没有操作，已断开连接`);
                            if (!$self.emit("TimeOutExit", $self))
                            {
                                alert(`长时间没有操作，已断开连接`);
                            }
                        }
                    }, $self.config.exitTimeout);
                    $self.emit("UserTimeOut", $self);
                }, $self.config.userTimeout);
            }
        }

        function configPeerConnection()
        {
            $self._controlChannel = null;

            var connectionCreator = RTCPeerConnection ? RTCPeerConnection : webkitRTCPeerConnection;
            $self._pc = new connectionCreator({ iceServers: $self.iceServers });
            
            $self._pc.onicecandidate = function(evt) {
                if (evt.candidate !== null) {
                    $self._ws.send(JSON.stringify({
                        type: "IceCandidate",
                        data: evt.candidate
                    }));
                }
            };
            
            $self._pc.ondatachannel = (evt) => {
                console.log("Get DataChannel", evt);
                if (evt.channel && evt.channel.label == "Control")
                {
                    let checksend = ()=>
                    {
                        while($self._controlChannel.sendQueue.length > 0 && evt.channel.bufferedAmount <= evt.channel.bufferedAmountLowThreshold)
                        {
                            evt.channel.send($self._controlChannel.sendQueue.shift());
                        }
                    }
                    $self._controlChannel = {
                        sendQueue: [],
                        send: (msg) => { 
                            if (msg.length > evt.channel.bufferedAmountLowThreshold)
                            {
                                let pktCount = Math.ceil(msg.length / evt.channel.bufferedAmountLowThreshold);
                                $self._controlChannel.sendQueue.push(`NEXT_COUNT:${pktCount}`);
                                let s = 0;
                                while(s < msg.length) {
                                    let e = s + Math.min(evt.channel.bufferedAmountLowThreshold, msg.length - evt.channel.bufferedAmountLowThreshold);
                                    $self._controlChannel.sendQueue.push(msg.slice(s, e));
                                    s = e;
                                }
                            }
                            else
                            {
                                $self._controlChannel.sendQueue.push(msg);
                            }
                            checksend();
                        }
                    };
                    evt.channel.bufferedAmountLowThreshold = 65536;
                    evt.channel.onbufferedamountlow = checksend;
                    evt.channel.onopen = () => {
                        new QWebChannel($self._controlChannel, function (channel) {
                            $self.Native = channel.objects.Native;
                            $self.objects = channel.objects;
                            console.info("Engine Native Loaded");
                            window.webchannelDebug = $self.config.debug;
                            $self.finishEventObjMap["NativeLoad"] = $self.Native;
                            $self.emit("NativeLoad", $self.Native);
                        }, $self.config.logger);
                    }
                    
                    evt.channel.onclose = () => {
                        console.log("Datachannel close");
                        $self._controlChannel = null;
                        $self.Native = null;
                        $self.nativeObjects = [];
                        $self.finishEventObjMap["NativeLoad"] = null;
                        $self.emit("Disconnected", "webrtc channel closed");
                    }
                    
                    $self.config.video.buffers = [];
                    $self.config.video.strBuffer = "";
                    $self.config.video.strCount = 0;
                    let relay_jpg_req = new ArrayBuffer(4); // for request next frame;
                    let dataView = new DataView(relay_jpg_req);
                    dataView.setInt32(0, RemotePlayerMsgType.RELAY_JPG_REQ, true);
                    let lastImage = new Image();
                    evt.channel.onmessage = (event) => {
                        const max_data_channel_buffersize = 256 * 1024;
                        if (typeof(event.data) == "string") {
                            if ("function" == typeof($self._controlChannel.onmessage)) { // setup by QWebChannel
                                $self.config.video.strCount--;
                                if ($self.config.video.strCount == -1)
                                {
                                    if (event.data.startsWith("NEXT_COUNT:"))
                                    {
                                        $self.config.video.strCount = parseInt(event.data.substr(11));
                                    }
                                    else
                                    {
                                        $self.config.video.strCount = 0;
                                        $self._controlChannel.onmessage({ data: JSON.parse(event.data) });
                                    }
                                }
                                else
                                {
                                    $self.config.video.strBuffer += event.data;
                                    if ($self.config.video.strCount == 0)
                                    {
                                        var allStr = $self.config.video.strBuffer;
                                        $self.config.video.strBuffer = "";
                                        $self._controlChannel.onmessage({ data: JSON.parse(allStr) });
                                    }
                                }
                            }
                        }
                        else {
                            if (event.data.byteLength > 4)
                            {
                                $self.config.video.buffers.push(event.data);
                            }
                            else
                            {
                                // not content package
                            }
                            if (event.data.byteLength < max_data_channel_buffersize)
                            {
                                if ($self.config.video.buffers.length > 0)
                                {
                                    var src = URL.createObjectURL(new Blob($self.config.video.buffers));
                                    $self.config.video.buffers = [];
                                    lastImage.src = src;
                                    lastImage.decode().then(()=>{
                                        var oldSrc;
                                        if ($self.config.video.tagName == 'VIDEO')
                                        {
                                            let stream = player.config.video.srcObject;
                                            oldSrc = player.config.video.poster;
                                            player.config.video.poster = src;
                                            player.config.video.src='';
                                            player.config.video.srcObject=stream;
                                        }
                                        else // img
                                        {
                                            if ($self._controlChannel) $self._controlChannel.send(relay_jpg_req);
                                            oldSrc = $self.config.video.src;
                                            $self.config.video.src = src;
                                        }
                                        if (oldSrc) URL.revokeObjectURL(oldSrc);
                                    })
                                    .catch((err)=>{
                                        if ($self._controlChannel && $self.config.video.tagName != 'VIDEO') $self._controlChannel.send(relay_jpg_req);
                                        console.error(`decode image failed: ${err}`);
                                        URL.revokeObjectURL(src);
                                    });
                                }
                                else
                                {
                                    if ($self._controlChannel && $self.config.video.tagName != 'VIDEO') $self._controlChannel.send(relay_jpg_req);
                                }
                            }
                        }
                    }
                }
            }

            $self._pc.ontrack = (evt) => {
                console.log("Get Remote Track", evt);
                $self._pc._track = evt.track;
                config.video.srcObject = evt.streams[0];
                config.video.play();
                $self.finishEventObjMap["VideoReady"] = $self.config.video;
                $self.emit("VideoReady", $self.config.video);
                $self.resetTimer();
            }

            $self._pc.onconnectionstatechange = (evt) => 
            {
                switch($self._pc.connectionState) {
                    case "connecting":{
                        console.log("peerconnection connecting");
                    } break;
                    case "connected": {
                        console.log("peerconnection connected");
                        $self.emit("Connected");
                    } break;
                    case "disconnected": {
                        console.log("peerconnection disconnected");
                        $self._pc.close();
                        $self.finishEventObjMap["NativeLoad"] = null;
                        $self.emit("Disconnected");
                    } break;
                    case "failed": {
                        console.log("peerconnection connect failed");
                        $self._pc.close();
                        $self.emit("ConnectedFailed", evt);
                    } break;
                }
            }
        }

        $self.reconnect = function() {
            if ($self.exited) return;
            try {
                $self._ws = new WebSocket(`${config.signalServer}?engineId=${config.engineId}&maxTimeout=${config.maxTimeout}&type=${config.isImage?"img":"video"}&rtcIni=${config.rtcIni}&jpgQuality=${config.jpgQuality}`);
                $self._ws.onopen = function () { console.log("signal websocket connected"); };
                $self._ws.onerror = function (e) {
                    console.log("signal websocket error", e);
                    $self.emit('Disconnected', "signal websocket error")
                }
                $self._ws.onmessage = function (msgData) {
                    msgData = msgData.data;
                    console.debug(msgData);
                    var msg = JSON.parse(msgData);

                    // 提示信息
                    if (msg.type == "Message") {
                        console.warn(msg.data);
                        if (!$self.emit("Message", msg.data))
                        {
                            alert(msg.data);
                        }
                    }
                    // 收到引擎会话的地址
                    else if (msg.type == "EngineWs") {
                        console.warn(msg.data);
                        $self.sessionWs = msg.data;
                        console.log(`Get Engine session connection info: ${$self.sessionWs}`);
                        $self._engineWs = new WebSocket($self.sessionWs);
                        let transport = {
                            send: (msg) => {
                                if ($self.config.debug && typeof msg == "string") console.log(msg);
                                $self._engineWs.send(msg);
                            }
                        };
                        $self._engineWs.onopen = () => {
                            console.log(`Engine session connected`);
                            $self.emit("Connected");
                            new QWebChannel(transport, function (channel) {
                                $self.Native = channel.objects.Native;
                                $self.objects = channel.objects;
                                console.info("Engine Native Loaded");
                                window.webchannelDebug = $self.config.debug;
                                $self.finishEventObjMap["NativeLoad"] = $self.Native;
                                $self._controlChannel = {
                                    send: (buffer) => {
                                        var str = window.btoa(String.fromCharCode(...new Uint8Array(buffer)));
                                        $self.Native.ControlChannel.send(str);
                                    }
                                };
                                $self.emit("NativeLoad", $self.Native);
                            }, $self.config.logger);
                        }
                        
                        $self._engineWs.onclose = () => {
                            $self._controlChannel = null;
                            $self.Native = null;
                            $self.nativeObjects = [];
                            $self.finishEventObjMap["NativeLoad"] = null;
                            $self.emit("Disconnected", "Engine session closed");
                        }
                        
                        $self._engineWs.onmessage = (event) => {
                            if (typeof(event.data) == "string") {
                                if ("function" == typeof transport.onmessage) { // setup by QWebChannel
                                    transport.onmessage({ data: JSON.parse(event.data) });
                                }
                            }
                            else {
                                var oldSrc = $self.config.video.src;
                                $self.config.video.src = URL.createObjectURL(event.data);
                                if (oldSrc) URL.revokeObjectURL(oldSrc);
                            }
                        }
                    }
                    // 收到连接引擎上线消息
                    else if (msg.type == "OpenSession") {
                        $self.iceServers = msg.data;
                        const connectMsg = JSON.stringify({
                            type: "ConnectRequest",
                            data: {}
                        });
                        $self._ws.send(connectMsg);
                    }
                    // 收到连接引擎回复
                    else if (msg.type == "OfferToClient") {
                        configPeerConnection();
                        var romoteSdp = new RTCSessionDescription(msg.data);
                        $self._pc.setRemoteDescription(romoteSdp).then(() => {
                            $self._pc.createAnswer().then((myDesc)=>{
                                var localSdp = new RTCSessionDescription(myDesc);
                                $self._pc.setLocalDescription(localSdp).then(() => {
                                    $self._ws.send(JSON.stringify({
                                        type: "AnswerToEngine",
                                        data: localSdp
                                    }));
                                }, (err)=>{ console.error("Set LocalDescription failed", err); });
                            }, (err)=>{ console.error("CreateAnswer failed", err); });
                        }, (err)=>{ console.error("Set RemoteDescription failed", err); });
                    }
                    // 收到IceCandidate消息
                    else if (msg.type === "IceCandidate") {
                        $self._pc.addIceCandidate(new RTCIceCandidate(msg.data));
                    }
                    // 收到关闭消息
                    else if (msg.type === "CloseSession") {
                        $self.exit();
                    }
                    else
                    {
                        console.warn(`Un processed message ${msg.type}`, msg.data);
                        alert(`${msg.type}: ${msg.data}`);
                    }
                }
            }
            catch (e)
            {
                $self.emit("Disconnected", e);
            }
        };

        $self.startCheckSignal = function(tripTimeCb, packetsLostCb)
        {
            let maxPacketsLost = 0, lastPacketsLost = 0;
            let get = (sipCb, sfuCb) => {
                if ($self._pc)
                {
                    $self._pc.getStats().then(function (report){
                        report.forEach((value, key) => {
                            if (value.type === 'candidate-pair') {
                                sipCb(value.currentRoundTripTime);
                            }
                            if (value.type == "inbound-rtp" || value.googContentType === 'realtime') {
                                sfuCb(value.packetsLost);
                            }
                        });
                    });
                }
                else
                {
                    sipCb(99.999);
                    sfuCb(999999);
                }
            };
            let lastTripTime, lastLost = -1;
            $self.watchSignalTimer = setInterval(()=>{
                get((tripTime)=>{
                    if (lastTripTime != tripTime)
                    {
                        lastTripTime = tripTime;
                        tripTimeCb(tripTime);
                    }
                }, (packetsLost)=>{
                    let lost = packetsLost - lastPacketsLost;
                    if (lost <= 0) maxPacketsLost = 0;
                    else if (lost > maxPacketsLost) maxPacketsLost = lost;
                    else lost = maxPacketsLost;
                    lastPacketsLost = packetsLost;

                    if (lost > 0)
                    {
                        console.log(`WebRTC has lost ${lost} packets`);
                    }
                    if (lost != lastLost)
                    {
                        lastLost = lost;
                        packetsLostCb(lost);
                    }
                });
            }, 1000);
        }
        
        $self.stopCheckSignalstartCheckSignal = function()
        {
            if ($self.watchSignalTimer) {
                clearInterval($self.watchSignalTimer);
                $self.watchSignalTimer = null;
            }
        }
    }

    // 初始化输入事件
    let style = getComputedStyle(config.video);
    let isMouseDown = false; // 用于全局监听判断鼠标是否按下
    let mouseDownInfo = {}; // 鼠标按下信息
    let keyList = []; // 键盘按键
    // 注册输入事件 
    if (!config.customInputEvent) {
        var events = {
                MouseMove:(e)=>{
                    let x = e.offsetX / parseFloat(style.width) * 2 - 1;
                    let y = e.offsetY / parseFloat(style.height) * 2 - 1;
                    $self.mousemove(x, y);
                    e.preventDefault();
                },
                MouseDown:(e)=>{
                    mouseDownInfo = e
                    let x = e.offsetX / parseFloat(style.width) * 2 - 1;
                    let y = e.offsetY / parseFloat(style.height) * 2 - 1;
                    $self.mousedown(x, y, e.button);
                    isMouseDown = true;
                    e.preventDefault();
                },
                MouseUp:(e)=>{
                    if (isMouseDown) {
                        mouseDownInfo = {}
                        let x = e.offsetX / parseFloat(style.width) * 2 - 1;
                        let y = e.offsetY / parseFloat(style.height) * 2 - 1;
                        $self.mouseup(x, y, e.button);
                        isMouseDown = false;
                        e.preventDefault();
                    }
                },
                MouseWheel:(e)=>{
                    let x = e.offsetX / parseFloat(style.width) * 2 - 1;
                    let y = e.offsetY / parseFloat(style.height) * 2 - 1;
                    $self.mosuewheel(x, y, e.wheelDeltaY);
                    e.preventDefault();
                },
                MouseDBClick:(e)=>{
                    let x = e.offsetX / parseFloat(style.width) * 2 - 1;
                    let y = e.offsetY / parseFloat(style.height) * 2 - 1;
                    $self.mousedbclick(x, y, e.button);
                    e.preventDefault();
                },
                TouchDown:(e)=>{
                    let w = parseFloat(style.width);
                    let h =  parseFloat(style.height);
                    let box = $self.config.video.getBoundingClientRect();
                    for (let i = 0; i < e.changedTouches.length; ++i) {
                        const t = e.changedTouches[i];
                        let x = (t.clientX - box.left) /  w * 2 - 1;
                        let y = (t.clientY - box.top) / h * 2 - 1;
                        y = -y;
                        $self.touchdown(x, y, t.identifier);
                    }
                    e.preventDefault();
                },
                TouchUp:(e)=>{
                    let w = parseFloat(style.width);
                    let h =  parseFloat(style.height);
                    let box = $self.config.video.getBoundingClientRect();
                    for (let i = 0; i < e.changedTouches.length; ++i) {
                        const t = e.changedTouches[i];
                        let x = (t.clientX - box.left) /  w * 2 - 1;
                        let y = (t.clientY - box.top) / h * 2 - 1;
                        y = -y;
                        $self.touchup(x, y, t.identifier);
                    }
                    e.preventDefault();
                },
                TouchMove:(e)=>{
                    let w = parseFloat(style.width);
                    let h =  parseFloat(style.height);
                    let box = $self.config.video.getBoundingClientRect();
                    for (let i = 0; i < e.changedTouches.length; ++i) {
                        const t = e.changedTouches[i];
                        let x = (t.clientX - box.left) /  w * 2 - 1;
                        let y = (t.clientY - box.top) / h * 2 - 1;
                        y = -y;
                        $self.touchmove(x, y, t.identifier);
                    }
                    e.preventDefault();
                },
                KeyDown: (e) => {
                    const keyIndex = keyList.findIndex(item=>{
                        return item.keyCode === e.keyCode
                    })
                    if (keyIndex === -1) {
                        keyList.push(e)
                    }
                    $self.keydown(e.keyCode);
                },
                KeyUp: (e) => {
                    const keyIndex = keyList.findIndex(item=>{
                        return item.keyCode === e.keyCode
                    })
                    keyList.splice(keyIndex,1)
                    $self.keyup(e.keyCode);
                },
                Blur: (e) => {
                    if (isMouseDown) {
                        let x = mouseDownInfo.offsetX / parseFloat(style.width) * 2 - 1;
                        let y = mouseDownInfo.offsetY / parseFloat(style.height) * 2 - 1;
                        $self.mouseup(x, y, mouseDownInfo.button);
                        isMouseDown = false;
                        mouseDownInfo = {}
                    }
                    for (let i = 0; i < keyList.length; i += 1) {
                        $self.keyup(keyList[i].keyCode);
                    }
                    keyList = []
                }
        }
        if (config.limtMoveCPS > 0)
            {
                var limtFuns =  (function(){
                    let mouse_x, mouse_y, mouse_hasChanged;
                    let touch_hasChanged, touch_moveList;
                    touch_moveList = new Map();
                    return {
                        mouse_intervalFun: () => {
                            if (mouse_hasChanged) {
                                mouse_hasChanged = false;
                                $self.mousemove(mouse_x, mouse_y);
                            }
                        },
                        mouse_moveFun: (evt)=>{
                            mouse_x = evt.offsetX / parseFloat(style.width) * 2 - 1;
                            mouse_y = evt.offsetY / parseFloat(style.height) * 2 - 1;
                            mouse_hasChanged = true;
                        },
                        touch_intervalFun: ()=>{
                            if (touch_hasChanged) {
                                touch_hasChanged = false;
                                touch_moveList.forEach((v,k)=>{
                                    $self.touchmove(v.x, v.y, k);
                                });
                                touch_moveList.clear();
                            }
                        },
                        touch_moveFun: (evt)=>{
                            let w = parseFloat(style.width);
                            let h =  parseFloat(style.height);
                            let box = $self.config.video.getBoundingClientRect();
                            for (let i = 0; i < evt.changedTouches.length; ++i) {
                            const t = evt.changedTouches[i];
                                let x = (t.clientX - box.left) /  w * 2 - 1;
                                let y = (t.clientY - box.top) / h * 2 - 1;
                                y = -y;
                                var o = touch_moveList.get(t.identifier);
                                if (!o || o.x != x || o.y != y)
                                {
                                    touch_moveList.set(t.identifier, {x: x, y: y});
                                    touch_hasChanged = true;
                                }
                            }
                        }
                    };
                })();

                var limtFunsMouseMoveInterval = setInterval(limtFuns.mouse_intervalFun, 1000 / config.limtMoveCPS);
                config.video.addEventListener("mousedown", (e) => {
                    clearInterval(limtFunsMouseMoveInterval);                    
                    limtFunsMouseMoveInterval = setInterval(limtFuns.mouse_intervalFun, 1000 / (config.limtMoveCPS * 2));
                });
                config.video.addEventListener("mouseup", (e)=>{
                    if (e.buttons == 0)
                    {
                        clearInterval(limtFunsMouseMoveInterval);
                        limtFunsMouseMoveInterval = setInterval(limtFuns.mouse_intervalFun, 1000 / config.limtMoveCPS);
                    }
                });
                config.video.addEventListener("mousemove", limtFuns.mouse_moveFun);

                var limtTouchMoveInterval;
                config.video.addEventListener("touchstart", (e)=>{
                    limtFuns.touch_intervalFun(); // flush all mouse move event
                    if (!limtTouchMoveInterval) limtTouchMoveInterval = setInterval(limtFuns.touch_intervalFun, 1000 / (config.limtMoveCPS * 3));
                });
                config.video.addEventListener("touchend", (e)=>{
                    limtFuns.touch_intervalFun(); // flush all mouse move event
                    if (e.buttons == 0) clearInterval(limtTouchMoveInterval);
                });
                config.video.addEventListener("touchmove", limtFuns.touch_moveFun, { passive: false });
        }
        else
        {
            config.video.addEventListener("mousemove", events.MouseMove);
            config.video.addEventListener("touchmove", events.TouchMove, { passive: false });
        }
        config.video.addEventListener("mousedown", events.MouseDown);
        config.video.addEventListener("mouseup", events.MouseUp);
        var win = window;
        while (win.parent && win.parent != win) win = win.parent;
        win.addEventListener("mouseup", events.MouseUp);

        config.video.addEventListener("mousewheel", events.MouseWheel);
        config.video.addEventListener("dblclick", events.MouseDBClick);

        config.video.addEventListener("touchstart", events.TouchDown);
        config.video.addEventListener("touchend", events.TouchUp);

        win.addEventListener("keydown", events.KeyDown);
        win.addEventListener("keyup", events.KeyUp);
        win.addEventListener("blur", events.Blur);

        if (!$self.isNativeApp)
        {
            config.video.addEventListener("mousedown", $self.resetTimer);
            config.video.addEventListener("mousemove", $self.resetTimer);
            config.video.addEventListener("mouseup", $self.resetTimer);
            config.video.addEventListener("mousewheel", $self.resetTimer);
            config.video.addEventListener("touchstart", $self.resetTimer);
            config.video.addEventListener("touchmove", $self.resetTimer);
            config.video.addEventListener("touchend", $self.resetTimer);
        }
    }

    if (config.autoResize) {
        setInterval((function () {
            let videoWidth, videoHeight;
            return function (force) {
                let width = Math.round(parseFloat(style.width));
                let height = Math.round(parseFloat(style.height));
                if (force || videoWidth != width || videoHeight != height) {
                    if ($self.resize(width, height)) {
                        videoWidth = width;
                        videoHeight = height;
                    }
                }
            }
        }()), 100);
    }

    $self.reconnect();
}

RemotePlayer.prototype.constructor = RemotePlayer;

// for event system
RemotePlayer.prototype.on = function(name, fn) {
    this.event[name] = fn;
    var arg = this.finishEventObjMap[name];
    if (arg) fn(arg);
};
RemotePlayer.prototype.off = function(name) { delete this.eventMap[name]; };
RemotePlayer.prototype.emit = function(name, ...val) {
    if (this.eventMap[name] && this.eventMap[name].length > 0) this.eventMap[name].forEach(fn => { fn(...val); })
    else return false;
    return true;
};

// send mousemove event
RemotePlayer.prototype.mousemove = (function()
{
    let buffer = new ArrayBuffer(12);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.MouseMove, true);
    return function(x, y)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            this._controlChannel.send(buffer);
            console.debug(`MouseMove: [${x}, ${y}]`);
            return true;
        }
        return false;
    }
}());

// send mousedown event
RemotePlayer.prototype.mousedown = (function()
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.MouseDown, true);
    return function(x, y, btn)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, btn, true);
            this._controlChannel.send(buffer);
            console.debug(`MouseDown: [${btn}, ${x}, ${y}]`);
            return true;
        }
        return false;
    }
}());

// send mouseup event
RemotePlayer.prototype.mouseup = (function()
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.MouseUp, true);
    return function(x, y, btn)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, btn, true);
            this._controlChannel.send(buffer);
            console.debug(`MouseUp:${btn} [${x}, ${y}]`);
            return true;
        }
        return false;
    }
}());

// send mousewheel event
RemotePlayer.prototype.mosuewheel = (function()
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.MouseWheel, true);
    return function(x, y, delta)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, delta, true);
            this._controlChannel.send(buffer);
            console.debug(`MouseWheel:${delta} [${x}, ${y}]`);
            return true;
        }
        return false;
    }
}());

// send mousedbclick event
RemotePlayer.prototype.mousedbclick = (function()
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.MouseDBClick, true);
    return function(x, y, btn)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, btn, true);
            this._controlChannel.send(buffer);
            console.debug(`MouseDBClick:${btn} [${x}, ${y}]`);
            return true;
        }
        return false;
    }
}());

// send resize event
RemotePlayer.prototype.resize = (function()
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.WindowSize, true);
    return function(w, h)
    {
        if (this._controlChannel && w >= 64 && h >= 64)
        {
            w = Math.ceil(w / 2.0) * 2.0;
            h = Math.ceil(h / 2.0) * 2.0;
            dataView.setFloat32(4, w, true);
            dataView.setFloat32(8, h, true);
            dataView.setInt32(12, 96/*DPI*/, true);
            this._controlChannel.send(buffer);
            console.debug(`WindowSize: [${w}, ${h}]`);
            return true;
        }
        return false;
    }
}());

// send touchdown event
RemotePlayer.prototype.touchdown = (function() 
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.TouchDown, true);
    return function(x, y, id)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, id, true);
            this._controlChannel.send(buffer);
            console.debug(`TouchDown:${id} [${x}, ${y}]`);
            return true;
        }
        return false;
    }
})();

// send touchup event
RemotePlayer.prototype.touchup = (function() 
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.TouchUp, true);
    return function(x, y, id)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, id, true);
            this._controlChannel.send(buffer);
            console.debug(`TouchUp:${id} [${x}, ${y}]`);
            return true;
        }
        return false;
    }
})();

// send touchmove event
RemotePlayer.prototype.touchmove = (function() 
{
    let buffer = new ArrayBuffer(16);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.TouchMove, true);
    return function(x, y, id)
    {
        if (this._controlChannel)
        {
            dataView.setFloat32(4, x, true);
            dataView.setFloat32(8, y, true);
            dataView.setInt32(12, id, true);
            this._controlChannel.send(buffer);
            console.debug(`TouchMove:${id} [${x}, ${y}]`);
            return true;
        }
        return false;
    }
})();

// send keydown event
RemotePlayer.prototype.keydown = (function () {
    let buffer = new ArrayBuffer(8);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.KeyDown, true);
    return function (keycode) {
        if (this._controlChannel) {
            dataView.setInt32(4, keycode, true);
            this._controlChannel.send(buffer);
            console.debug(`KeyDown:${keycode}`);
            return true;
        }
        return false;
    }
})();

// send keyup event
RemotePlayer.prototype.keyup = (function () {
    let buffer = new ArrayBuffer(8);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.KeyUp, true);
    return function (keycode) {
        if (this._controlChannel) {
            dataView.setInt32(4, keycode, true);
            this._controlChannel.send(buffer);
            console.debug(`KeyUp:${keycode}`);
            return true;
        }
        return false;
    }
})();

// send exit event
RemotePlayer.prototype.exit = (function(){
    let buffer = new ArrayBuffer(4);
    let dataView = new DataView(buffer);
    dataView.setInt32(0, RemotePlayerMsgType.Exit, true);
    return function()
    {
        clearTimeout(this._userTimer);
        if (this._controlChannel)
        {
            this._controlChannel.send(buffer);
            this._controlChannel = null;
        }
        if (this._ws)
        {
            this._ws.close();
            this._ws = null;
        }
        if (this._pc)
        {
            this._pc.close();
            this._pc = null;
        }
        if (!this.exited) {
            this.exited = true;
            console.info("Exit");
        }
        return true;
    }
})();

RemotePlayer.prototype.snapshot = function() {
    var canvas = document.createElement("canvas");
    canvas.width = this.config.video.width | this.config.video.videoWidth;
    canvas.height = this.config.video.height | this.config.video.videoHeight;
    var ctx = canvas.getContext("2d");
    ctx.translate(canvas.width / 2, canvas.height / 2);
    ctx.scale(1, -1);
    ctx.translate(-canvas.width / 2, -canvas.height / 2);
    ctx.drawImage(this.config.video, 0, 0, canvas.width, canvas.height);
    var img = document.createElement("img");
    img.src = canvas.toDataURL("image/jpeg", 1);
    img.save = function(){
        var alink = document.createElement("a");
        alink.href = img.src;
        alink.download = "snapshot.jpg";
        alink.click();
    }
    return img;
};