import java.applet.*;    // Don't forget these import statements!
import java.awt.*;
import java.awt.Rectangle;
import java.lang.*;
import java.util.Random;


public class hello extends Applet implements Runnable {
    
    	Thread t;
    	Random generator = new Random();

    	
		Image Buffer;
		Graphics gBuffer;
		
	//	for Baddies
		int baddies_number = 30;
		int baddies_teams_number = 2;
		int baddies_angle[][] = new int[baddies_number][3];
		int baddies_size = 10;
		Rectangle[] baddies = new Rectangle[baddies_number];
		
		Image dirt = Toolkit.getDefaultToolkit().getImage(getClass().getResource("dirt.jpg"));
		
	public void init() {
		Buffer=createImage(size().width,size().height);
		gBuffer=Buffer.getGraphics();
	
		for (int i = 0; i < baddies_number; i++){
			baddies[i] = new Rectangle(generator.nextInt(size().width - baddies_size), generator.nextInt(size().height - baddies_size), baddies_size, baddies_size);
			if (collisiontest(i) == -1){
				baddies_angle[i][0] = generator.nextInt(31) - 16;
				baddies_angle[i][1] = generator.nextInt(31) - 16;
				if (i <= baddies_number/2 - 1) baddies_angle[i][2] = 0;
					else baddies_angle[i][2] = 1;
				}
			else i--;
			}
		t=new Thread(this);
		t.start();
		
		
  	}


	public int collisiontest(int currentball_number){

			for(int i = 0; i < currentball_number; i++){
			if (i != currentball_number && baddies[currentball_number].intersects(baddies[i]) == true) return i;
				}
		return -1;
		} 		

	
	public void battle(int ball1, int ball2) {
		if (ball1 == -1) return;
		// balls are same colour
		if (baddies_angle[ball1][2] == baddies_angle[ball2][2]){
			if (baddies[ball1].width > baddies[ball2].width) {baddies[ball2].width = 0; baddies[ball1].height += 5; baddies[ball1].width += 5;} 
			if (baddies[ball1].width < baddies[ball2].width) {baddies[ball1].width = 0; baddies[ball2].height += 5; baddies[ball2].width += 5;}
			if (baddies[ball1].width == baddies[ball2].width) {baddies_angle[ball1][0] *= -1; baddies_angle[ball1][1] *= -1; baddies_angle[ball2][0] *= -1; baddies_angle[ball2][1] *= -1;}
			}
		// balls are different colours
		else {
			if(baddies[ball1].width > baddies[ball2].width) {baddies[ball1].width += 5; baddies[ball1].height += 5; baddies[ball2].width = 0;}
			if(baddies[ball2].width > baddies[ball1].width) {baddies[ball2].width += 5; baddies[ball2].height += 5; baddies[ball1].width = 0;}			}
			if(baddies[ball1].width == baddies[ball2].width) {baddies_angle[ball1][0] *= -1; baddies_angle[ball1][1] *= -1; baddies_angle[ball2][0] *= -1; baddies_angle[ball2][1] *= -1;}

		}

	
	public void drawstuff() {
		gBuffer.drawImage(dirt, 0, 0, this);
		for (int i = 0; i < baddies_number; i++){
				if (baddies[i].width != 0){
					if (baddies_angle[i][2] == 0) gBuffer.setColor(Color.red);
					if (baddies_angle[i][2] == 1) gBuffer.setColor(Color.blue);
					gBuffer.fillRect(baddies[i].x,baddies[i].y,baddies[i].width,baddies[i].height);
					}
				}
		}


    public void paint(Graphics g) {
    	drawstuff();
        g.drawImage(Buffer,0,0,this);
    }
    
    public void update(Graphics g) {
    	paint(g);
    }


    public void run(){
    	while(true)
    	{
	
    		for(int i = 0; i < baddies_number; i++){
    				
    			if(baddies[i].width != 0){
    				
    				
   					if(baddies_angle[i][0] > 0) {baddies[i].x += baddies_angle[i][0];
   						if (baddies[i].x >= size().width - baddies[i].width){
   							baddies[i].x = size().width - baddies[i].width;
   							baddies_angle[i][0] *= -1;
   							}
							battle(collisiontest(i), i);
   						}
   					if(baddies_angle[i][0] < 0) {baddies[i].x += baddies_angle[i][0];
   						if (baddies[i].x < 0){
   							baddies[i].x = 0;
   							baddies_angle[i][0] *= -1;
   							}
							battle(collisiontest(i), i);
   						
   						}
   					
   				
   					if(baddies_angle[i][1] > 0) {baddies[i].y += baddies_angle[i][1];
   						if (baddies[i].y >= size().height - baddies[i].height){
   							baddies[i].y = size().height - baddies[i].height;
   							baddies_angle[i][1] *= -1;
   							}
							battle(collisiontest(i), i);
   						}
   					if(baddies_angle[i][1] < 0) {baddies[i].y += baddies_angle[i][1];
   						if (baddies[i].y < 0){
   							baddies[i].y = 0;
   							baddies_angle[i][1] *= -1;
   							}
							battle(collisiontest(i), i);
   						
   						}
   				
   					}
				}
				
				repaint();
//				for(int i = 0; i < baddies_number; i++)
//					{if (baddies[i].intersects(chickenpos) == true) return;
//					}
				try {
					t.sleep(300);
					}
				catch (InterruptedException e) {}
		}
	}

	

}