package com.hb.proj.diagram.diagnose;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.util.List;

/**
 * 功图绘制，用于功图诊断，作为被诊断对象、标准功图
 * 只需要闭合曲线，其他不需要绘制
 * 功图诊断时，最好标准功图和待诊断功图出自同一绘制方法、同大小
 * @author cwen
 *
 */
public class DiagramRender {

	private Color canvasColor;
	private int canvasWidth;
	private int canvasHeight;
	
	private int originX ;  //原点x值
    private int originY ; //原点y值
	
    private int xAxisEnd;
	private int yAxisEnd;
	
    
    private double xMinValue;
    private double yMinValue;
    private double xMaxValue;
    private double yMaxValue;
    private double xRatio;
    private double yRatio;
   
    
    public DiagramRender(){
		this(360,180);
	}
    
    public DiagramRender(int canvasWidth,int canvasHeight){
    	this.canvasWidth=canvasWidth;
		this.canvasHeight=canvasHeight;
		this.canvasColor=new Color(255,255,255);
		this.originX=10;
		this.originY=canvasHeight-10;
		this.xAxisEnd=canvasWidth-10;
		this.yAxisEnd=10;
		this.xMaxValue=3;
		this.xMinValue=0;
		this.yMaxValue=50;
		this.yMinValue=0;
	}
    
    public void draw(Graphics2D g2,List<Double> disps,List<Double> oths,double stroke,double maxOth,double minOth) {
    	this.xMinValue=0;
    	this.xMaxValue=Math.ceil(stroke);
    	this.yMinValue=Math.floor(minOth); //定格画，避免井的个体特性影响相似性判断，相当于各类图缩放在一个区域内
    	this.yMaxValue=Math.ceil(maxOth);
    	
    	this.xRatio=(this.xAxisEnd-this.originX)/(this.xMaxValue-this.xMinValue);
    	this.yRatio=(this.originY-this.yAxisEnd)/(this.yMaxValue-this.yMinValue);
    	
    	this.drawCanvas(g2);
    	//this.drawCoordinate(g2);
    	this.drawCurve(g2, disps, oths);
    }
    
    
    
    /**
     * 绘制画布
     * @param g2
     */
	public void drawCanvas(Graphics2D g2){
		g2.setColor(this.canvasColor);
		g2.fillRect(0, 0, this.canvasWidth, this.canvasHeight);
	}
	
	/**
	 * 简易坐标轴
	 * @param g2
	 */
	public void drawCoordinate(Graphics2D g2) {
		g2.setStroke(new BasicStroke(1));
		g2.setColor(new Color(212,212,212));
		g2.drawLine(this.originX, this.originY, this.originX, this.yAxisEnd);     //y 轴
		g2.drawLine(this.xAxisEnd, this.originY, this.xAxisEnd, this.yAxisEnd);     //y border
		g2.drawLine(this.originX, this.yAxisEnd, this.xAxisEnd, this.yAxisEnd);     //x border
		g2.drawLine(this.originX, this.originY,this.xAxisEnd,this.originY);     //x bottom-border
		
		int yGirdCount=5;
		double yGridDivide=(this.originY-this.yAxisEnd)/yGirdCount;
		double tempy=0;
		for(int i=1;i<yGirdCount;i++) {
			tempy=this.originY-i*yGridDivide;
			g2.draw(new Line2D.Double(this.originX, tempy, this.xAxisEnd,tempy));
		}
	}
	
	/**
	 * 绘制曲线
	 * @param g2
	 * @param disps
	 * @param oths
	 */
	public void drawCurve(Graphics2D g2,List<Double> disps,List<Double> oths) {
		g2.setStroke(new BasicStroke(1));
		g2.setPaint(new Color(0,0,0));
		double ptx=getX(disps.get(0)),pty=getY(oths.get(0));
		double nptx=0,npty=0;
		for(int i=1,len=disps.size(),len2=oths.size();i<len && i<len2;i++) {
			nptx=getX(disps.get(i));
			npty=getY(oths.get(i));
			g2.draw(new Line2D.Double(ptx, pty, nptx,npty));
			
			ptx=nptx;
			pty=npty;
		}
		
		nptx=getX(disps.get(0));
		npty=getY(oths.get(0));
		g2.draw(new Line2D.Double(ptx, pty, nptx,npty));
	}
	
	
	private double getX(double val) { 
		return this.originX+(val-this.xMinValue)*this.xRatio;
	}

	private double getY(double val) { 
		return this.originY-(val-this.yMinValue)*this.yRatio;
	}
	
	
}