//Fish定義了一條魚(yú)游動(dòng)的一些參量以及如何在Panel上顯示魚(yú)
package fish;

import java.util.Random;

public class Fish extends Thread{
	private Random rand = new Random();
	
	int fishID;	//魚(yú)的ID號(hào)
	int x;      //該魚(yú)的x坐標(biāo)
	int y;      //該魚(yú)的y坐標(biāo)
	int width;  //該魚(yú)使用的圖片的寬度
	int height; //該魚(yú)使用的圖片的高度
	
	//隨機(jī)產(chǎn)生魚(yú)初始游的方向	
	int down = rand.nextInt(10)%2;//down=1 : 向下游;down=0 : 向上游
	int right = rand.nextInt(10)%2;//right=1: 向右游
	
	//用來(lái)控制刷新周期,sleepTime越小,兩次刷新之間的時(shí)間間隔就越小,從而速度就越快
	private int sleepTime = rand.nextInt(50);
	//隨機(jī)產(chǎn)生斜游角度比x:y=angle,即在x方向上游動(dòng)angle次之后才在y方向上移動(dòng)一次
	private int angle = rand.nextInt(5)+2;
	
	//隨機(jī)產(chǎn)生魚(yú)上下左右游動(dòng)的最大上限，即振幅
	private int xSwing = rand.nextInt(1500);
	private int ySwing = rand.nextInt(800);
	
	private int countXSwing = 0;//x方向上振幅計(jì)數(shù)
	private int countYSwing = 0;//y方向上振幅計(jì)數(shù)
	
	//一個(gè)數(shù)組，包含了上述除了魚(yú)ID的所有參量
	private int[] fishStates = new int[12];
	
	boolean isRunning;
	
	private FishPanel panel;
	
	public Fish(int fishID,int x,int y,int width,int height,FishPanel panel,boolean isRunning){
		this.fishID = fishID;
		this.x = x;
		this.y = y;
		this.width = width;
		this.height = height;
		this.panel = panel;
		this.isRunning = isRunning;
		this.start();
	}
	
	public Fish(int fishID,int[] state,FishPanel panel,boolean isRunning){
		this.fishID = fishID;
		this.x = state[0];
		this.y = state[1];
		this.width = state[2];
		this.height = state[3];
		this.down = state[4];
		this.right = state[5];
		this.sleepTime = state[6];
		this.angle = state[7];
		this.xSwing = state[8];
		this.ySwing = state[9];
		this.countXSwing = state[10];
		this.countYSwing = state[11];
		this.panel = panel;
		this.isRunning = isRunning;
		this.start();
	}
	
	public void run()
	{
		while(isRunning)
		{
			computeX();
 			computeY();
 			try
			{
 				sleep(sleepTime);//sleepTime
 			}
 			catch(Exception ex){
 				ex.printStackTrace();
 			}
 			panel.repaint();
 		}
	}
	
	public void reStart(){
		this.isRunning = true;
	}
	
	public void halt()
 	{
 		this.isRunning = false;
 	}
	
	public void computeX(){
		if(right == 1){
 			if(countXSwing == xSwing)
 			{//判斷是否到右端邊框或達(dá)到最大振幅
 				right=0; 
 				reset('x');
 			}
 			if(x >= panel.getWidth()){
 				this.x = -width;
 				StringBuffer buffer = new StringBuffer();
 				int[] states = this.getFishStates();
 				for(int i = 0 ;i < states.length;i ++){
 					if(i!=0)buffer.append(FishConstants.ARRAY_SEPARATOR);
 					buffer.append(states[i]);
 				}
 				buffer.append('\n');
 				panel.messageManager.sendMessage(Integer.toString(this.fishID),buffer.toString());
 				//reset('x');
 				this.halt();
 			}
 			x++;
 		}
 		else
 		{
 			 if(countXSwing == xSwing)
 			 {//判斷是否到左端邊框或達(dá)到最大振幅
 			 	right=1; 
 			 	reset('x');
 			 }
 			 if(x+width <= 0){
 			 	this.x = panel.getWidth();
 			 	StringBuffer buffer = new StringBuffer();
 				int[] states = this.getFishStates();
 				for(int i = 0 ;i < states.length;i ++){
 					if(i!=0)buffer.append(FishConstants.ARRAY_SEPARATOR);
 					buffer.append(states[i]);
 				}
 				buffer.append('\n');
 				panel.messageManager.sendMessage(Integer.toString(this.fishID),buffer.toString());
 				this.halt();
 			 }
 			 x--; 
 		}
 		countXSwing++;
	}
	
	//計(jì)算魚(yú)的上下游動(dòng)
	public void computeY(){
		//判斷隨機(jī)數(shù)l是否為0，是則水平游動(dòng)，否則計(jì)算角度
		if(countXSwing%angle == 0){
			if(down == 1)//x former
				{//down=1表示向下游且當(dāng)x++或x--了l次后，y++
				if( countYSwing == ySwing)
				{//判斷是否到底或上下振幅游滿否
					down=0; 
					reset('y');
					}
				if(y >= panel.getHeight()){
					this.y = -height;
					StringBuffer buffer = new StringBuffer();
	 				int[] states = this.getFishStates();
	 				for(int i = 0 ;i < states.length;i ++){
	 					if(i!=0)buffer.append(FishConstants.ARRAY_SEPARATOR);
	 					buffer.append(states[i]);
	 				}
	 				buffer.append('\n');
	 				panel.messageManager.sendMessage(Integer.toString(this.fishID),buffer.toString());
	 				this.halt();
	 				//reset('y');
				}
				y++;
				}
			else if(countXSwing%angle == 0)//x former
				{//當(dāng)向上游且當(dāng)x++或x--了l次之后,y--
				if(countYSwing == ySwing)
				{
					down=1; 
					reset('y');
					}
				if(y+height <= 0)
				{
					this.y = panel.getHeight();
					StringBuffer buffer = new StringBuffer();
	 				int[] states = this.getFishStates();
	 				for(int i = 0 ;i < states.length;i ++){
	 					if(i!=0)buffer.append(FishConstants.ARRAY_SEPARATOR);
	 					buffer.append(states[i]);
	 				}
	 				buffer.append('\n');
	 				panel.messageManager.sendMessage(Integer.toString(this.fishID),buffer.toString());
	 				this.halt();
	 				//reset('y');
				}
				y--;
				}
		countYSwing++;
		}
		}
	
	public void reset(char direction){
		//魚(yú)游動(dòng)狀態(tài)改變后重新生成各項(xiàng)數(shù)值
 		if(direction=='x')
 		{
 			xSwing = rand.nextInt(1500);//重新生成新的左右振幅(判斷依據(jù)：x)
 			countXSwing = 0; //左右振幅計(jì)數(shù)清0
 		}
 		else
 		{
 			ySwing = rand.nextInt(800);//重新生成新的上下振幅(判斷依據(jù)：y)
 			countYSwing = 0;//上下振幅計(jì)數(shù)清0
 		}
 		sleepTime = rand.nextInt(50);//重新生成新的速度
 		angle = rand.nextInt(5)+2;//重新生成新的角度比
	}
	
	public int[] getFishStates(){
		fishStates[0] = this.x;
		fishStates[1] = this.y;
		fishStates[2] = this.width;
		fishStates[3] = this.height;
		fishStates[4] = this.down;
		fishStates[5] = this.right;
		fishStates[6] = this.sleepTime;
		fishStates[7] = this.angle;
		fishStates[8] = this.xSwing;
		fishStates[9] = this.ySwing;
		fishStates[10] = this.countXSwing;
		fishStates[11] = this.countYSwing;
		return fishStates;

	}
}