/*==================================================================================

LRC 格式文件，加载、数据格式化

===================================================================================*/

var lrc = new Object();

lrc.head = {}	 // { ti:菊花台, ar:周杰伦, al:依然范特西, by:lizaixing, offset:500 }
lrc.body = {}	 // { 7490:"good",10960:"better",13610:"best",...}
lrc.bodyIdx = [] // [7490,10960,13610,...]
lrc.foot = []	 // ["bottom text","foot text",...]
//lrc.indent;	 // lrc.body 开始要等待的时间

lrc.url;

lrc.load = function(url,sucHandler) {
	var self = this
	this.url = url;
	var t_xml = new XML();
	t_xml.onLoad = function(success) {
		if (success) {
			var arr = this.firstChild.nodeValue.split(' \r\n').join("\r\n").split('\r\n');
			var tme;
			var headFlag = true;
			
			self.head = {}
			self.body = {}
			self.bodyIdx = []
			lselfc.foot = []

			for( var i=0,t,s; i<arr.length; i++ ){
				if(self.isBody(arr[i])){
					if(headFlag) headFlag = false;

					tme = self.extractBetween(arr[i],"[", "]",false)
					s = arr[i].substr(arr[i].lastIndexOf("]")+1)
					for(var j in tme){
						t = self.calcMSEL(tme[j])
						self.body[t] = s
						self.bodyIdx.push(t)
					}
					/*
					tme = self.extractStr(arr[i],"[", "]")
					tme = self.calcMSEL(tme)
					self.body[tme]=self.extractStr(arr[i],"]", null)
					self.bodyIdx.push(tme)
					*/
				}else if(headFlag){
					tme = self.extractBetween(arr[i],"[", "]",false)[0].split(":")
					self.head[tme[0]] = tme[1]
				}else{
					self.foot.push(arr[i])
				}
			}
			if(!self.head["offset"]){ self.head["offset"]=0 }
			else{	self.head["offset"] = Number(self.head["offset"]) }

			self.head["ti"] = '歌曲：' + self.head["ti"]
			self.head["ar"] = '主唱：' + self.head["ar"]
			self.head["al"] = '专集：' + self.head["al"]
			self.head["by"] = '歌词制作：' + self.head["by"]

			self.bodyIdx.sort(16)

			sucHandler()
			//self.indent = self.bodyIdx[0]
			//self.indent = self.bodyIdx[0] + self.head["offset"]
			
		}else{	//制作模式，不播放MP3
		
			//for(var i in sys.ctrlMc){
			//	sys.ctrlMc[i].enabled = false
			//}
			
			/*
			sys.ctrlMc.fullscreen_btn.enabled = false
			sys.ctrlMc.pause_btn.enabled = false
			sys.ctrlMc.play_btn.enabled = false
			sys.ctrlMc.stop_btn.enabled = false
			*/
			
			//sys.ctrlMc.volume_mc.switch_btn.enabled = false
		}
	};
	
	t_xml.load(url);
	
	
};

lrc.isBody = function(str){
	return !isNaN(str.substr(1,2)) && !isNaN(str.substr(4,2))? true : false;
}

lrc.calcMSEL = function(str){
	//01:24.87
	var arr = str.split(':')
	return (Number(arr[0])*60 + Number(arr[1]))*1000
}

/*
text = "Sometimes {people} like to {eat} the most {fatty} foods when eat {out}.";
trace(lrc.extractBetween(text,"{", "}", true));		// {people},{eat},{fatty},{out}
trace(lrc.extractBetween(text,"{", "}", false));	// people,eat,fatty,out
*/

lrc.extractBetween = function(str, starts, ends, inclusive){
	var ary = [];
	var sl = starts.length;
	var el = ends.length;
	var s,e;
	while (str.length) {
		s = str.indexOf(starts);
		if (s == -1) return ary;
		e = str.indexOf(ends, s+sl);
		if (e == -1) return ary;
		if (inclusive) ary.push(str.substring(s, e) + ends);
		else ary.push(str.substring(s+sl, e));
		str = str.substr(e+el);
	}
	return ary;
}