package uk.ac.leeds.ccg.andyt.projects.genesis.gui;

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.io.File;
import java.net.URL;

public class AnimationApplet extends Applet {

    Image[] img;
    int index = 0;
    int maxImg;
    MediaTracker tracker;

    public void init() {
        File _Directory = new File("C:/temp/test/");
        String[] _Filenames = _Directory.list();
        img = new Image[_Filenames.length];  // 2 images in animation
        maxImg = img.length - 1;
        tracker = new MediaTracker(this);
        try {
            // images loading
            for (int i = 0; i < _Filenames.length; i++) {
                img[i] = getImage(new URL(getDocumentBase(), "test/" + _Filenames[i]));
                //System.out.println(new URL(getDocumentBase(), "test/" + _Filenames[i]));
                tracker.addImage(img[i], i);
            }
            tracker.waitForAll();
        } catch (Exception e) {
            e.printStackTrace();
        }

        AnimationThread at = new AnimationThread();
        at.delayedAnimation(this, 500);
        at.start();
    }

    public void paint(Graphics g) {
        if (img[0] != null) {
            g.drawImage(img[index], 0, 0, this);
            index = (index < maxImg) ? index + 1 : 0;
        }
    }

    public void animate() {
        repaint();
    }

    class AnimationThread extends Thread {

        AnimationApplet animationApplet;
        int delay;

        public void delayedAnimation(AnimationApplet a, int delay) {
            this.animationApplet = a;
            this.delay = delay;
        }

        @Override
        public void run() {
            while (true) {
                try {
                    animationApplet.resize(
                            img[0].getWidth(animationApplet),
                            img[0].getHeight(animationApplet));
                    sleep(delay);
                    animationApplet.animate();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}