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();
      }
    }
  }
}