function CmsTalk() {
    this.wasmLoaded = false;
    this.logger = new Logger("CmsTalk");
    this.urlBufferBuffer = null
    this.audioCache = null
    this.localAudioStream = null
    this.ws = null
    this.mediaRecorder = null
    this.audioBuffer = null

    this.rec = null
    // this.recBlob = null;
    /**调用open打开录音请求好录音权限**/

    this.RecorderOpen()
}

CmsTalk.prototype.RecorderOpen = function () {

    //recOpen我们可以选择性的弹一个对话框：为了防止移动端浏览器存在第三种情况：用户忽略，并且（或者国产系统UC系）浏览器没有任何回调
    var showDialog = function () {
        if (!/mobile/i.test(navigator.userAgent)) {
            return //只在移动端开启没有权限请求的检测
        }
        dialogCancel()

        //显示弹框，应该使用自己的弹框方式
        var div = document.createElement("div")
        document.body.appendChild(div)
        div.innerHTML =
            "" +
            '<div class="waitDialog" style="z-index:99999;width:100%;height:100%;top:0;left:0;position:fixed;background:rgba(0,0,0,0.3);">' +
            '<div style="display:flex;height:100%;align-items:center;">' +
            '<div style="flex:1;"></div>' +
            '<div style="width:240px;background:#fff;padding:15px 20px;border-radius: 10px;">' +
            '<div style="padding-bottom:10px;">录音功能需要麦克风权限，请允许；如果未看到任何请求，请点击忽略~</div>' +
            '<div style="text-align:center;"><a onclick="waitDialogClick()" style="color:#0B1">忽略</a></div>' +
            "</div>" +
            '<div style="flex:1;"></div>' +
            "</div>" +
            "</div>"
    }
    var createDelayDialog = function () {
        dialogInt = setTimeout(function () {
            //定时8秒后打开弹窗，用于监测浏览器没有发起权限请求的情况，在open前放置定时器利于收到了回调能及时取消（不管open是同步还是异步回调的）
            showDialog()
        }, 8000)
    }
    var dialogInt
    var dialogCancel = function () {
        clearTimeout(dialogInt)

        //关闭弹框，应该使用自己的弹框方式
        var elems = document.querySelectorAll(".waitDialog")
        for (var i = 0; i < elems.length; i++) {
            elems[i].parentNode.removeChild(elems[i])
        }
    }
    //recOpen弹框End

    var formatMs = function (ms, all) {
        var f = Math.floor(ms / 60000),
            m = Math.floor(ms / 1000) % 60
        var s =
            (all || f > 0 ? (f < 10 ? "0" : "") + f + ":" : "") +
            (all || f > 0 || m > 0 ? ("0" + m).substr(-2) + "″" : "") +
            ("00" + (ms % 1000)).substr(-3)
        return s
    }
    // var recOpen = function () {//一般在显示出录音按钮或相关的录音界面时进行此方法调用，后面用户点击开始录音时就能畅通无阻了
    this.newRec = Recorder({
        type: "pcm", sampleRate: 8000, bitRate: 16 //mp3格式，指定采样率hz、比特率kbps，其他参数使用默认配置；注意：是数字的参数必须提供数字，不要用字符串；需要使用的type类型，需提前把格式支持文件加载进来，比如使用wav格式需要提前加载wav.js编码引擎
        , onProcess: function (buffers, powerLevel, bufferDuration, bufferSampleRate, newBufferIdx, asyncEnd) {
            newBufferIdx = 0
            var newChunkInfo = Recorder.SampleData(buffers, 48000, 8000, this.prevChunkInfo);
            this.sendAudioData(newChunkInfo.data)
            this.prevChunkInfo = newChunkInfo
            for (let index = buffers.length - 1; index >= 0; index--) {
                buffers[index] = null;
            }
        }.bind(this)
    });

    // createDelayDialog(); //我们可以选择性的弹一个对话框：为了防止移动端浏览器存在第三种情况：用户忽略，并且（或者国产系统UC系）浏览器没有任何回调，此处demo省略了弹窗的代码


    window.waitDialogClick = function () {
        dialogCancel();
        console.log("打开失败：权限请求被忽略，<span style='color:#f00'>用户主动点击的弹窗</span>", 1);
    };
    // };
}

//打开麦克风授权获得相关资源
CmsTalk.prototype.open = function (callback) {
    // dialogCancel(); //如果开启了弹框，此处需要取消
    if (this.rec){
        console.log("已打开录音设备，可以点击录制开始录音了", 2);
        callback(null)
        return
    }

    this.newRec.open(function () {
        this.rec = this.newRec;
        console.log("已打开录音设备，可以点击录制开始录音了", 2);
        callback()
    }.bind(this), function (msg, isUserNotAllow) {
        //用户拒绝未授权或不支持
        // dialogCancel(); //如果开启了弹框，此处需要取消
        var log = (isUserNotAllow ? "UserNotAllow，" : "") + "打开录音失败：" + msg;
        console.log(log);
        callback(log)
    })
}

/**关闭录音，释放资源**/
CmsTalk.prototype.recClose = function () {
    if (this.rec) {
        this.rec.close();
        this.rec = null
        console.log("已关闭");
    } else {
        console.log("未打开录音", 1);
    };
};

/**开始录音**/
CmsTalk.prototype.recStart = function () {//打开了录音后才能进行start、stop调用
    this.prevChunkInfo = null
    if (this.rec && Recorder.IsOpen()) {
        // this.recBlob = null;
        this.rec.start();
        console.log("已开始录音...");
    } else {
        console.log("未打开录音", 1);
    };
};

/**暂停录音**/
CmsTalk.prototype.recPause = function () {
    if (this.rec && Recorder.IsOpen()) {
        this.rec.pause();
    } else {
        console.log("未打开录音", 1);
    };
};
/**恢复录音**/
CmsTalk.prototype.recResume = function () {
    if (this.rec && Recorder.IsOpen()) {
        this.rec.resume();
    } else {
        console.log("未打开录音", 1);
    };
};

/**结束录音，得到音频文件**/
CmsTalk.prototype.recStop = function () {
    if (!(this.rec && Recorder.IsOpen())) {
        console.log("未打开录音", 1);
        return;
    };
    this.rec.stop(null, null);
};

CmsTalk.prototype.startTalk = function (url, callback) {
    this.open((err) => {
        if (err) {
            callback(err)
        } else {
            if (url.indexOf("http") != -1) {
                //方式1,可手动修改talk-server对应的地址
                this.ws = new WebSocket("ws://192.168.0.215:3000");
                this.ws.onmessage = function (msg) {
                    console.log(msg);
                };
                this.ws.onopen = (ev) => {
                    console.log("open")
                    this.ws.send(url)

                    this.recStart()
                    if (callback)
                        callback(null)
                }
            }
            else {
                //方式2
                this.ws = new WebSocket(url);
                this.ws.onmessage = function (msg) {
                    console.log(msg);
                };
                this.ws.onopen = (ev) => {
                    console.log("open")
                    this.recStart()
                    if (callback)
                        callback(null)
                }
            }
        }
    })


}

CmsTalk.prototype.stopTalk = function () {
    if (this.ws) {
        this.ws.close();
        this.ws = null
    }
    if (this.audioBuffer) {
        delete this.audioBuffer
        this.audioBuffer = null
    }
    this.recStop()
    // this.recClose()
}

CmsTalk.prototype.sendAudioData = function (samples) {
    var u8Data = alawmulaw.alaw.encode(samples);
    if (!this.audioBuffer)
        this.audioBuffer = new Uint8Array([])

    var tmpBuffer = new Uint8Array(this.audioBuffer.byteLength + u8Data.byteLength)
    tmpBuffer.set(this.audioBuffer, 0)
    tmpBuffer.set(u8Data, this.audioBuffer.byteLength)
    while (tmpBuffer.byteLength >= 480) {
        var d480 = tmpBuffer.subarray(0, 480);
        tmpBuffer = tmpBuffer.subarray(480);
        console.log("reserve ", tmpBuffer.length)
        if (this.ws)
            this.ws.send(d480)
    }
    this.audioBuffer = tmpBuffer
}