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();
                        }
                }
        }
}