import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JPanel;

public class PatternJPanel extends JPanel {
	private static final long serialVersionUID = 1L;
	private static final int HEIGHT = 50;
	private static final int PADDING = 2;
	public static final int ZOOM_MULTIPLIER = 10;
	
	private Music music;
	private TimeLineJPanel timeLine;
	private int end;

	public PatternJPanel(Music music, TimeLineJPanel timeLine) {
		this.music = music;
		this.timeLine = timeLine;
		end = transformZoon(music.getMusicPattern().getStop());
		setPreferredSize(new Dimension((int) end, HEIGHT));
	}
	
	public void refreshPreferedSize() {
		end = transformZoon(music.getMusicPattern().getStop());
		setPreferredSize(new Dimension((int) end, HEIGHT));
	}
	
	public int getEnd() { return end; }
	public Music getMusic() { return music; }
	
	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);

		g.setColor(Color.WHITE);
		int begin = transformZoon(music.getMusicPattern().getBegin());
		g.fillRect(begin, 0, end, HEIGHT);
		
		MusicPattern pattern = music.getMusicPattern();
		g.setColor(Color.BLACK);
		for(int i=0; i<pattern.getRepeat(); i++) {
			int repeatAddition = transformZoon(pattern.getTotalLength() * i) + begin;
			g.drawLine(repeatAddition, HEIGHT - PADDING,
					transformZoon(pattern.getPatternTiming()[0]) + repeatAddition, HEIGHT - PADDING);
			g.drawLine(transformZoon(pattern.getPatternTiming()[0]) + repeatAddition, HEIGHT - PADDING,
					transformZoon(pattern.getPatternTiming()[1]) + repeatAddition, PADDING);
			g.drawLine(transformZoon(pattern.getPatternTiming()[1]) + repeatAddition, PADDING,
					transformZoon(pattern.getPatternTiming()[2]) + repeatAddition, PADDING);
			g.drawLine(transformZoon(pattern.getPatternTiming()[2]) + repeatAddition, PADDING,
					transformZoon(pattern.getPatternTiming()[3]) + repeatAddition, HEIGHT - PADDING);
			g.drawLine(transformZoon(pattern.getPatternTiming()[3]) + repeatAddition, HEIGHT - PADDING, 
					transformZoon(pattern.getPatternTiming()[4]) + repeatAddition, HEIGHT - PADDING);
		}
	}

	private int transformZoon(int n) {
		return transformZoon((long) n);
	}
	private int transformZoon(long n) {
		return (int) ((double) n / (double) ZOOM_MULTIPLIER * timeLine.getZoomLevel());
	}
}