import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  
  import javax.swing.Box;
  import javax.swing.BoxLayout;
  import javax.swing.ImageIcon;
  import javax.swing.JButton;
  import javax.swing.JPanel;
  
  public class AnimationPlayer extends JPanel implements ActionListener {
  	private static final long serialVersionUID = 1L;
  

  	private LightCanvasJPanel lightCanvas;
  	private MusicList musicList;
  	

  	private JButton backward;
  	private JButton stop;
  	private JButton play;
  	private JButton pause;
  	private JButton forward;

  	
  	private long tick = 0;
  	private boolean go = false;
  	private boolean stopClock = false;
  	private static final int TICK_JUMP = 20;
  	private Thread tickClock = new Thread(new Runnable() {
  		@Override
  		public void run() {
  			while(!stopClock) {
  				if(!go) { // pause
  					try { Thread.sleep(100); }
  					catch (InterruptedException ignored) {}
  					continue;
  				}
  				
  				long before = System.currentTimeMillis();
  				lightCanvas.paintLights(musicList.render(tick));
  				tick += TICK_JUMP;
  				long after = System.currentTimeMillis();
  				
  				if(after - before < TICK_JUMP) {
  					try { Thread.sleep(10 - after + before);}
  					catch (InterruptedException ignored) {}
  				} else if(after - before > TICK_JUMP) {
  					System.err.println("Animation were slowed down by " + String.valueOf(after - before - 10) + " ticks !");
  				}
  			}
  		}
  	});
  	public void stopTickClock() {stopClock = true;}

  	public AnimationPlayer(LightCanvasJPanel lightCanvas, MusicList musicList) { this(lightCanvas, musicList, BoxLayout.LINE_AXIS); }
  	public AnimationPlayer(LightCanvasJPanel lightCanvas, MusicList musicList, int direction) {
  		this.lightCanvas = lightCanvas;
  		this.musicList = musicList;
  		

  		setLayout(new BoxLayout(this, direction));
  
  		add(Box.createHorizontalGlue());
  		
  		// backward button
  		backward = new JButton(new ImageIcon(getClass().getResource("/icons/backward.png")));
  		backward.addActionListener(this);
  		add(backward);
  		
  		// stop button
  		stop = new JButton(new ImageIcon(getClass().getResource("/icons/stop.png")));
  		stop.addActionListener(this);
  		add(stop);
  		
  		// play button
  		play = new JButton(new ImageIcon(getClass().getResource("/icons/play.png")));
  		play.addActionListener(this);
  		add(play);
  		
  		// pause button
  		pause = new JButton(new ImageIcon(getClass().getResource("/icons/pause.png")));
  		pause.addActionListener(this);
  		add(pause);
  		
  		// forward button
  		forward = new JButton(new ImageIcon(getClass().getResource("/icons/forward.png")));
  		forward.addActionListener(this);
  		add(forward);
  
  		add(Box.createHorizontalGlue());

  		
  		tickClock.start();

  	}
  	
  	@Override
  	public void actionPerformed(ActionEvent e) {
  		// TODO player actions
  		if(e.getSource() == backward) {

  			tick -= 500;
  			if(tick < 0)
  				tick = 0;

  		}else if(e.getSource() == stop) {

  			go = false;
  			tick = 0;

  		}else if(e.getSource() == play) {

  			go = true;

  		}else if(e.getSource() == pause) {

  			go = false;

  		}else if(e.getSource() == forward) {

  			tick += 500;

  		}
  	}
  }