import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.io.*;

import java.lang.ref.SoftReference;
import java.net.URL;
import java.net.MalformedURLException;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;


public class viewer {

	private IRController irControl;

	private ViewerActions actions;

	protected ViewFrame viewFrame;

	private JFrame thumbFrame;

	private ArrayList imgs;

	private int current = -1;

	public viewer () {
		imgs = new ArrayList();

		actions = new ViewerActions(this);


		viewFrame = new ViewFrame();
		viewFrame.addWindowListener(new ExitWindowListener());
		viewFrame.addKeyListener(new KeyController(this));

		JPopupMenu popupMenu = new JPopupMenu();
		addMenus(popupMenu);
		viewFrame.imgPanel.addMouseListener(new PopupMouseListener(popupMenu));

		/*
		JMenuBar menuBar = new JMenuBar();
		addMenus(menuBar);
		viewFrame.setJMenuBar(menuBar);
*/

		//createViewFrame();
		createThumbFrame();

		startIRController();
	}

	private void addMenus (JComponent m) {
		JMenu zoomMenu = new JMenu("Zoom");
		zoomMenu.add(new JButton(actions.getAction(ViewerActions.ZOOM_IN_ACTION)));
		m.add(zoomMenu);

		m.add(new JButton(actions.getAction(ViewerActions.QUIT_ACTION)));
	}

//	private void createViewFrame () { }

	private void createThumbFrame () {
		ThumbPanel thumbs = new ThumbPanel(this);
		JScrollPane thumbScr = new JScrollPane(thumbs);
		thumbFrame = new JFrame();
		thumbFrame.setTitle("Index");
		thumbFrame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
		thumbFrame.setContentPane(thumbScr);
		thumbFrame.pack();
	}

	private void startIRController () {
		try {
			irControl = new IRController(this);
		} catch (Throwable t) {
			System.err.println(t.toString());
		}
	}

	protected ArrayList getImgs () {
		return imgs;
	}

	public void setCurrent (int i) {
		if (i >= 0 && i < imgs.size()) {
			current = i;
			thumbFrame.hide();
			showCurrent();
		}
	}

	private void showCurrent () {
		viewFrame.showImage((ImageEntry)imgs.get(current), current, imgs.size());
	}


	public void addImage (URL url) {
		imgs.add(new ImageEntry(url));
	}

	private void preload (int i) {
		if (i >= 0 && i < imgs.size()) {
			new PreloadThread((ImageEntry)imgs.get(i)).start();
		}
	}

	public void prevImage () {
		if (current > 0) {
			current--;
			showCurrent();
			preload(current-1);
		}
	}

	public void nextImage () {
		if (current < imgs.size()-1) {
			current++;
			showCurrent();
			preload(current+1);
		}
	}

	public void doCommand (String comm) {
		System.out.println("Got command: " + comm);

		Action action = actions.getAction(comm);
		if (action != null) {
			action.actionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, comm));
		} else {
			System.err.println("Unknown command: " + comm);
		}

	}

	public void quit () {
		System.exit(0);
	}

	public static String file (String name) {
		URL url = viewer.class.getResource(name);
		return url == null ? name : url.getFile();
	}

	protected class ExitWindowListener extends WindowAdapter {
		public void windowClosing (WindowEvent e) {
			quit();
		}
	}

	public static void main (String[] args) {
		try {
			URL pwd = new File(System.getProperty("user.dir")).toURL();
			viewer v = new viewer();
			for (int i = 0; i < args.length; i++) {
				try {
					URL url = new URL(pwd, args[i]);
					if (new File(url.getFile()).isDirectory()) {
						System.out.println(url + " is a directory.");
					} else {
						v.addImage(url);
					}
				} catch (MalformedURLException ex) {
					System.err.println("Bad URL: " + args[i]);
				}
			}
			
			if (v.imgs.size() == 0) {
				System.err.println("No images.");
				System.exit(1);
			}
			
			v.nextImage();
		} catch (MalformedURLException ex) {
			System.err.println("Bad current directory: " + ex.toString());
		}
	}
}