function Line(opts){
	opts=opts||{};
	this.id=null;
	this.smpTime=opts.smpTime;
	this.color="#000000";
	this.title=null;
	this.weight=1;
	this.type=opts.type||"GT";
	this.xUnit=opts.xUnit||"m";
	this.yUnit=opts.yUnit||"kN";
	this.xMin=null;
	this.xMax=null;
	this.yMin=null;
	this.yMax=null;
	this.xProjs=null;
	this.yProjs=null;
	this.datas=null;
	this.yOrigMax=null;
	this.yOrigMin=null;
	this.turnX=null;
	this.turnIndex=null;
	this.startUp=true;
	this.upColor="#0000ff";
	this.downColor="#00ff00";
	this.colorAry=[];
	this.yUpMaxProj=null;
	this.yDownMaxProj=null;
	this.balance=null;
	this.stroke=null;
}

Line.prototype={
	setData:function(xVals,yVals){
		this.xProjs=xVals;
		this.yProjs=yVals;
		
		this.yMax=yVals[0];
		this.yMin=yVals[0];
		this.xMax=xVals[0];
		this.xMin=xVals[0];
		this.datas=[];
		this.datas.push([xVals[0],yVals[0]]);
		var upIndex,dwnIndex;
	    for (var i=1,len=xVals.length,len2=yVals.length;i<len&&i<len2;i++ ) {
	    	this.datas.push([xVals[i],yVals[i]]);
	    	if(yVals[i]>this.yMax){
	    		this.yMax=yVals[i];
	    	}
	    	if(yVals[i]<this.yMin){
	    		this.yMin=yVals[i];
	    	}
	    	if(xVals[i]>=this.xMax){  //增加或=，表明停顿区域算入开始方向
				  this.xMax=xVals[i];
				  upIndex=i;
			}
			if(xVals[i]<=this.xMin){
			   this.xMin=xVals[i];
			   dwnIndex=i;
			}
	    }
	    
	    //闭合曲线
	    this.datas.push([xVals[0],yVals[0]]);
	    
	    this.stroke=Math.round((this.xMax- this.xMin) * 100) / 100;
	    var tempStroke=Math.floor(this.stroke);
	    if(this.stroke-tempStroke<0.05){
		      this.stroke=tempStroke;
	    }
	    
	     var tempXMax=Math.floor(this.xMax);
	     this.xMax= (this.xMax- tempXMax) >= 0.05?this.xMaxProj:tempXMax;
		 this.yOrigMax=this.yMax;
		 this.yOrigMin=this.yMin;
		 this.parseUpDwnMax(upIndex,dwnIndex);
		 this.countBalance();
	},
	
	parseUpDwnMax:function(upIdx,dwnIdx){
		
		 this.startUp = (this.xMax- this.xProjs[0]) > (this.xProjs[0] - this.xMin);
		 if (this.startUp) {
			 this.colorAry=[this.upColor,this.downColor];
		 }
		 else {
			 this.colorAry=[this.downColor,this.upColor]; 
		 }
		 this.turnIndex=this.startUp?upIdx:dwnIdx;
		 
		 if(this.type=="GT"){
			    return;	
		 }
		 var tempMax1=-1000;
		 var tempMax2=-1000;
		 for(var i=0,len=this.xProjs.length,len2=this.yProjs.length;i<len&&i<len2;i++){
			 if(i<=this.turnIndex){
				 tempMax1=tempMax1<this.yProjs[i]?this.yProjs[i]:tempMax1;
			 }
			 else{
				 tempMax2=tempMax2<this.yProjs[i]?this.yProjs[i]:tempMax2;
			 }
			 
		 }
		 this.yUpMaxProj=this.startUp?tempMax1:tempMax2;
		 this.yDownMaxProj=this.startUp?tempMax2:tempMax1;
		 
	},
	
	getDesc:function(){  //曲线描述文本,其它文本由外部传入
		var txt=[];
		
		txt.push("冲程："+this.stroke+this.xUnit)
		if(this.type=="GT"){
			txt.push("最大载荷："+this.yMax+this.yUnit);
			txt.push("最小载荷："+this.yMin+this.yUnit);
		}
		else{
			txt.push("上行最大："+this.yUpMaxProj+this.yUnit);
			txt.push("下行最大："+this.yDownMaxProj+this.yUnit);
			txt.push("平衡度："+this.balance);
		}
		
		return txt;
	},
	    
		countBalance:function(){  //计算平衡度，默认是不计算值为0
			this.balance=0;
			if(this.type=="DL"){  //电流曲线平衡度计算
				this.balance=Math.round(this.yUpMaxProj*100*100/this.yDownMaxProj)/100;  //带两位小数
			}
			else if(this.type=="DGL"){  //功率曲线平衡度计算
				var  sumArea1=0;
			    var  sumArea2=0;
				var i;
				var h;
				var tempSum;
				for(i=0;i<this.xProjs.length-1&&i<this.yProjs.length-1;i++){
					h=Math.abs(this.xProjs[i+1]-this.xProjs[i]);
					tempSum=(this.yProjs[i+1]+this.yProjs[i])*h/2;
					if((i+1)<=this.turnIndex){
						sumArea1+=tempSum;
					}
					else{
						sumArea2+=tempSum;
					}
				}
				
				this.balance=this.startUp?(sumArea1/sumArea2):(sumArea2/sumArea1);
				this.balance=Math.round(this.balance*100*100)/100;
			}
			
			
			
		}
};

export {Line}