import java.applet.*;
import java.awt.*;
import javax.swing.*;

public class SwimDash extends JApplet implements Runnable{

    private Thread thread;
    private MediaTracker tracker;

    private SwimingPool pool;

    private java.util.List sprites;
    private static final int SPRITE_NUMBER = 8;
    private static final String BACKGROUND_FILENAME = "waterBackground.gif";
    private static final String FOREGROUND_FILENAME = "waterForeground.gif";
    private static final String SPRITE_FILENAME = "swimmer";
    private static final String SPRITE_FILESUFFIX = "gif";

    public void init(){
        tracker = new MediaTracker(this);

        Image foregroundImage = getImage(getDocumentBase(), FOREGROUND_FILENAME);
        Image backgroundImage = getImage(getDocumentBase(), BACKGROUND_FILENAME);
        tracker.addImage(foregroundImage, 0);
        tracker.addImage(backgroundImage, 0);

        sprites = new java.util.ArrayList(8);
        for(int i = 0 ; i < SPRITE_NUMBER ; i++){
            Image tempImage = getImage(getDocumentBase(),
                                       SPRITE_FILENAME + i + "." + SPRITE_FILESUFFIX);
            sprites.add(tempImage);
            tracker.addImage(tempImage, 0);
        }

        pool = new SwimingPool(this, sprites, foregroundImage, backgroundImage);
        getContentPane().setLayout(new BorderLayout());
        getContentPane().add(pool, BorderLayout.CENTER);
    }

    public void start(){}
        
    public void stop(){
        thread = null;
    }

    public void gameStart(){
        thread = new Thread(this);
        thread.start();
    }

    public void gameStop(){
        stop();
    }

    public void run(){
        try{
            tracker.waitForID(0);
        }catch(InterruptedException e){
            return;
        }

        Thread currentThread = Thread.currentThread();

        while(currentThread == thread){
            pool.increaseIndex();
            pool.repaint();
            
            try{
                Thread.sleep(100);
            }catch(InterruptedException ex){}
        }
    }
}