// 设置语音播报对象
var Voice = function() {
	this.speak = window.speechSynthesis;
	this.tospeak = new SpeechSynthesisUtterance('');
	this.voice = '';
	this.zh_CN = false;
	this.rate = 1.5; 
	this._setLang();			// 获取并检测是否有中文的环境
	this.timeInterval = 27;		//循环间隔(秒)
	this.speak_enable = true;			//ture:开启语音播报         false:停止语音播报
};

// 播报语音		(调用发声的方法时请使用延时发声)
Voice.prototype.play = function(txt,callback) {
	if(!this.zh_CN) {
		console.info('你的电脑不支持中文播报！');		
	}
	_timeInterval = this.timeInterval;
	//console.info(this.speak_enable);
	if(!this.speak_enable){									//识别是否开启声音播报
		if(callback && typeof callback == 'function'){
			setTimeout(function(){
				callback();
			}, Math.abs(_timeInterval)*1000);
		}
		return;
	}
	this.cancel();
	this.tospeak.text = txt;
	this.tospeak.voice = this.voice;	// 设定中文播报
	this.tospeak.rate = this.rate;
	//console.info(to_speak);
	var starttime = new Date();
	this.speak.speak(this.tospeak);
	//console.info(this.tospeak);
	this.tospeak.onend = function(event) {	
		//console.info("播放结束");
		if(callback && typeof callback == 'function'){
			var endtime = new Date();
			var timelong = (endtime.getTime()-starttime.getTime())/1000;
			//console.info(parseInt(_timeInterval)+"==="+parseInt(timelong));
			if(timelong > this.timeInterval){				
				callback();
			}else{
				setTimeout(function(){
					callback();
				}, Math.abs(_timeInterval-timelong)*1000);
			}
		}
	};
	

};

// 开启/关闭当前语音播报 （依赖与base.js导入的Cookie方法）
Voice.prototype.changeSpeak = function(bool) {
	this.speak_enable = bool;
	setCookie('voice', bool);
	// 退出当前播报
	if(!bool) {
		this.cancel();
	}
};

// 退出当前播报
Voice.prototype.cancel = function() {
	this.speak.cancel();
};


//停止语音播报
Voice.prototype.stopSpeak = function() {
	this.speak.cancel();
	this.speak_enable = false;
};

// 检查当前语言环境
Voice.prototype._setLang = function() {
	var _this = this;
	setTimeout(function(){
		var voices = _this.speak.getVoices();
		for(var i=0; i<voices.length; i++) {
			var _voices = voices[0];
			//console.info(_voices);
			if(_voices.lang === 'zh-CN') {
				_this.zh_CN = true;
				_this.voice = _voices;
			}
		}
	}, 0);
};



var voice = new Voice();
var voiceStatus = checkPageVoiceStatus();
// 设置初始语音播报状态
voice.changeSpeak(voiceStatus);
voice.cancel();

// 设置初始化语音播报图标
if(!voiceStatus) {
	$('.web-status .cell-list.voice').addClass('close-voice');
}

// 点击声音的图标
$('.web-status .cell-list.voice').click(function() {
	$(this).toggleClass('close-voice');
	// 判断是否关闭声音
	if($(this).hasClass('close-voice')) {
		voice.changeSpeak(false);
	}else {
		voice.changeSpeak(true);
	}
});

// 获取页面语音是否开启
function checkPageVoiceStatus() {
	var voiceStatus = getCookie('voice');
	// 设置初始语音播报状态
	voiceStatus = voiceStatus=='false'?false:true;
	
	return voiceStatus;
}