package headfirst.proxy.virtualproxy;

import java.awt.Component;
import java.awt.Graphics;
import java.net.URL;

import javax.swing.Icon;
import javax.swing.ImageIcon;

class ImageProxy implements Icon {
	ImageIcon imageIcon;
	URL imageURL;
	Thread retrievalThread;
	boolean retrieving = false;

	public ImageProxy(URL url) { imageURL = url; }

	public int getIconWidth() {
		if (imageIcon != null) {
			return imageIcon.getIconWidth();
		} else {
			return 800;
		}
	}

	public int getIconHeight() {
		if (imageIcon != null) {
			return imageIcon.getIconHeight();
		} else {
			return 600;
		}
	}

	public void paintIcon(final Component c, Graphics  g, int x,  int y) {
		if (imageIcon != null) {
			imageIcon.paintIcon(c, g, x, y);
		} else {
			g.drawString("Loading CD cover, please wait...", x+300, y+190);
			if (!retrieving) {
				retrieving = true;

				retrievalThread = new Thread(() -> {
					try {
						imageIcon = new ImageIcon(imageURL, "CD Cover");
						c.repaint();
					} catch (Exception e) {
						e.printStackTrace();
					}
				});
				retrievalThread.start();
			}
		}
	}
}