String.tmpl = function(str, obj, st) {
	return str.replace(/\{([\w_$]+)\}/g, function(c, $1) {
		var a = obj[$1];
		if (a === undefined || a === null) {
			if (st === undefined || st === null) {
				return '';
			}
			switch (st) {
			case 0:
				return '';
			case 1:
				return $1;
			default:
				return c;
			}
		}
		if ('[object Function]' == Object.prototype.toString.call(a)) {
			a = a($1);
		}
		return a;
	});
};

/* DataCollection */
DataCollection = function() {
	this.map = {};
	this.keys = [];
	this.length = 0;
};

DataCollection.prototype = {
	get: function(key) {
		return this.map[key];
	},
	getAt: function(index) {
		return this.map[this.keys[index]];
	},
	add: function(key, Value) {
		if (typeof this.map[key] == 'undefined') {
			this.keys.push(key);
		}
		this.map[key] = Value;
		this.length = this.keys.length;
	},
	remove: function(key) {
		var obj;
		var i;
		for (i = 0; i < this.keys.length; i++) {
			if (this.keys[i] == key) {
				obj = this.map[key];
				this.map[key] = null;
				delete this.map[key];
				this.keys.splice(i, 1);
				this.length = this.keys.length;
				return obj;
			}
		}
		return null;
	},
	removeAt: function(index) {
		var obj;
		if (index < this.keys.length) {
			obj = this.map[this.keys[index]];
			delete this.map[this.keys[index]];
			this.keys.splice(index, 1);
			this.length = this.keys.length;
			return obj;
		}
		return null;
	},
	clear: function(key) {
		this.length = this.keys.length = 0;
		this.map = {};
		this.valuetype = {};
		return this;
	}
};

var dataCollection = new DataCollection();

// 将时间转换成秒数
function localString2Second(sTime) {
	var temp = sTime.split(":");
	var returnSeconds = 0;
	if(temp.length==3){
		returnSeconds = parseInt((temp[0] * 3600), 10) + parseInt((temp[1] * 60), 10) + parseInt(temp[2], 10);
	}else if(temp.length==2){
		returnSeconds = parseInt((temp[0] * 60), 10) + parseInt(temp[1], 10);
	}else if(temp.length==1){
		returnSeconds = parseInt(temp[0], 10);
	}
	return (returnSeconds);
}

// 将秒数转换成时间
function second2LocalString(iTime) {
	var t, h, m, s, timeStr;
	t = Math.floor(iTime);
	h = Math.floor(t / 3600);
	t = t - h * 3600;
	m = Math.floor(t / 60);
	t = t % 60;
	s = Math.floor(t);
	if (h === 0) {
		timeStr = (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
	} else {
		timeStr = (h < 10 ? '0' + h : h) + ':' + (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
	}
	return timeStr;
}


var lectureSections=[];//所有的 LectureSection 对象
var selecedSection;



// 	清除讲义区块的选中样式
function clearLectureBlockStyle(){
    selecedSection && selecedSection.unselect(true);
}

function goTargetTime(startTime) {
	var currentSeconds = startTime;
	if(parent.playerObj.getDuration() < 1){
		return;
	}
	parent.playerObj.setCurrentTime(currentSeconds); 
}

// 视频同步讲义
function goTargetLectureCon(playerMediaTime) {
	var currentPos;
	if(playerMediaTime){
		currentPos=playerMediaTime;
	}else{
		currentPos=parent.playerObj.getCurrentTime();
	}
	if(selecedSection){
		if(currentPos >= selecedSection.startTime && currentPos <= selecedSection.endTime){
			return;
		}else if(currentPos < selecedSection.startTime -10 || currentPos > selecedSection.endTime){//发现flash的跳转不是十分准确，要允许一些误差
			selecedSection.unselect();
		}
	}
	for(var i=0; i<lectureSections.length;i++){
		var section=lectureSections[i];
		if(currentPos >= section.startTime && currentPos <= section.endTime){
			section.select(true);
		}else if(currentPos < section.startTime -10 || currentPos > section.endTime){
			section.unselect();
		}
	}
	if(selecedSection){
		//ifScrollIntoView(selecedSection.$startNode);
	}
}
function ifScrollIntoView($el){
	if(!$el[0]){
		return;
	}
	var t=$el.offset().top;
	var st = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
	var h=$(window).height();
	if(t<st-20 || t>st+h/2){
		$el[0].scrollIntoView();
	}
}
var LectureSection=function($startMarker,$endMarker){
	var me=this;
	this.$startMarker=$startMarker;
	this.$endMarker=$endMarker;
	this.startTime=parseFloat(this.$startMarker.attr('time'));
	this.endTime=parseFloat(this.$endMarker.attr('time'));
	var $startParents=$startMarker.parents();
	var $endParents=$endMarker.parents();
	var $startParent=this.$startNode=$startMarker.parent();
	var $endParent=this.$endNode=$endMarker.parent();
	var $sectionNode;
	if($startParent[0] == $endParent[0]){
		$sectionNode=$startParent;
	}else{
		var $startNexts=$startParent.nextUntil($endParents);
		var $endPrevs=$endParent.prevUntil($startParents);
		var nodes
		$sectionNode=$startParent.add($startNexts).add($endPrevs).add($endParent);
	}
	this.$sectionNode=$sectionNode;
	this.initDom();
	this.buttons=[];
	this.createToolbar();
	this.createButton('视频跳转至本节开始',function(){
		me.seek2me();
	});
}
var str_dbclick='双击视频跳转至本节开始'
var str_current='正在播放本节内容'

LectureSection.prototype={
	toolbarTpl:'<div class="toolbar_anchor"><div class="toolbar"></div></div>',
	buttonTpl:'<a class="btnItem" href="javascript:void(0);">{text}</a>',
	createToolbar:function(){
		this.$toolbar=$(this.toolbarTpl);
		this.$toolbar.prependTo(this.$wrap);
		return this.$toolbar;
	},
	createButton:function(text,func){
		var $button=$(String.tmpl(this.buttonTpl,{'text':text}));
		$button.appendTo(this.$toolbar.children());
		if(func){
			$button.on('click',func)
		}
		this.buttons.push($button);
	},
	initDom:function(){
		var me=this;
		var title='时间范围：'+second2LocalString(this.startTime)+'-'+second2LocalString(this.endTime)+'&#13;';
		title += str_dbclick;
		var $wrap= this.$wrap=$('<div class="lecture_section" title="'+title+'"></div>').insertBefore(this.$startNode);
		$wrap.append(this.$sectionNode);
		$wrap.hover(
			function(){
				me.highlight();
			},
			function(){
				me.unhighlight();
			}
		);
		$wrap.on('dblclick',function(){
			me.seek2me();
		});
	},
	highlight:function(scrollIntoView){
		this.$wrap.addClass('highlight');
	},
	unhighlight:function(){
		this.$wrap.removeClass('highlight');
	},
	hide:function(){
		this.$wrap.hide();
	},
	show:function(){
		this.$wrap.show();
	},
	select:function(setCurrent){
		this.$wrap.show();
		this.$wrap.prop('title',this.$wrap.prop('title').replace(str_dbclick,str_current))
		if(setCurrent){
			selecedSection=this;
		}
	},
	unselect:function(setCurrent){
		this.$wrap.hide();
		this.$wrap.prop('title',this.$wrap.prop('title').replace(str_current,str_dbclick))
		if(setCurrent){
			selecedSection=null;
		}
	},
	seek2me:function(scrollIntoView){
		var me=this;
		if(selecedSection && selecedSection != me){
			selecedSection.unselect();
		}
		me.select(true);
		if(scrollIntoView){
			//ifScrollIntoView(me.$wrap);
		}
		goTargetTime(me.startTime+0.5);
	}
}

//页面载入时，根据span.marker节点，初始化相应的 LectureSection 对象，并保存在 lectureSections数组
var lectureContentLoaded=function(){
	var $markers=$('span.marker');
	$markers.each(function(){
		var $marker=$(this)
		var time=this.getAttribute('time');
		time=Number(time);
		$marker.data('time',time);
		if(time){
			dataCollection.add(time,$marker);
		}
	});

	//dataCollection.keys.sort(function(a,b){return a-b});
	//console.log(dataCollection.keys)
	//console.log(dataCollection.map)
	for(i=0;i<dataCollection.keys.length;i++){
		var $marker=dataCollection.get(dataCollection.keys[i]);
		if($marker && $marker.hasClass('timeMarker_start')){
			$endMarker=dataCollection.get(dataCollection.keys[i+1])
			if($endMarker){
				var lectureSection=new LectureSection($marker,$endMarker);
				lectureSections.push(lectureSection);
				lectureSection.hide()
			}
		}
	}
	$(document.body)
}
EventUtil.addHandler(window,"load",lectureContentLoaded);