import java.awt.BorderLayout;
import java.awt.Cursor;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;

import javax.imageio.ImageIO;
import javax.swing.JApplet;
import javax.swing.JFrame;

/**
 * @author DanO
 *This is designed to run as an applet or an application
 */
public class WebCamDisplay extends JApplet {

	ArrayList pictures = new ArrayList();
	static int kWidth = 800;
	static int kHeight= 600;

	/**
	 * Constructor
	 *
	 */
	public WebCamDisplay() {
		//call up all the picture files local or from the web
		pictures = getPicturesInWebDirectory("http://itp.nyu.edu/~dbo3/VideoSensing/test/");
		//pictures = getPicturesInFileDirectory("C:\\",false);
		repaint();	
	}
	/**
	 * Lazy
	 *
	 */
	public void  put(String s){
		System.out.println(s);
	}
	/**
	 * This is like the main of applets, called automatically by the browser.  If you are in an application
	 * it gets called manually in the main method.
	 *
	 */
	public void init() {
		  setSize(kWidth,kHeight);
	}
	/**
	 * This is a bit like the main of applets, called just after init automatically by the browser.  If you are in an application
	 * it gets called manually in the main method.
	 *
	 */
	public void start() {
		repaint();
	}
	/**
	 * Main is ignored if this is running as an applet.  If it runs as
	 * an application we make a Frame that acts like the browser to give a home to the applet.
	 *
	 */
	public static void main(String[] args) {
		WebCamDisplay myDisplayApplet = new WebCamDisplay();
		JFrame frame = new JFrame();
		frame.setVisible(true);
		frame.setSize(kWidth,kHeight);
		frame.getContentPane().add(myDisplayApplet, BorderLayout.CENTER);
		myDisplayApplet.init();
		myDisplayApplet.start();
	}

	/**
	 * Paint the pictures on the screen. For home work you might
	 * try to fit them into a grid or something fancier.
	 *
	 */
	public void paint(Graphics g) {

		for (int i = 0; i < pictures.size(); i++){
			BufferedImage bi = (BufferedImage) pictures.get(i);
			g.drawImage(bi, i*bi.getWidth(), 0, null);
		}
	}
	/**
	 * Get a list of pictures from a web directory
	 *
	 */
	public ArrayList getPicturesInWebDirectory(String _dir) {
		// for this to work you have to make you directory listing visible to
		// the web
		// by adding a file called ".htacces" with one line "DirectoryIndex
		// showit" in it.
		ArrayList pics = new ArrayList();
		try {

			URL myURL = new URL(_dir);
			BufferedReader dis = new BufferedReader(new InputStreamReader(myURL.openStream()));
			// InputStreamReader isr = new InputStreamReader(myURL.openStream())

			String line = dis.readLine();

			while (line != null) {
				if (line.indexOf("img src=\"/icons/image2.gif") != -1) {
					String frontMark = "<a href=\"";
					int beg = line.indexOf(frontMark) + frontMark.length();
					int end = line.indexOf("\"", beg);

					String filename = line.substring(beg, end);
					System.out.println("----" + filename);
					BufferedImage bi = ImageIO.read(new URL(_dir + filename));
					pics.add(bi);
				}

				line = dis.readLine();

			}
		} catch (IOException e) {
			System.out.println("BAD URL");
		}
		return pics;
	}
	/**
	 * Get a list of pictures from a file directory
	 *
	 */
	 public ArrayList getPicturesInFileDirectory(String _dir, boolean _deeper) {
		 	ArrayList pictures = new ArrayList();
	        setCursor(new Cursor(Cursor.WAIT_CURSOR));
	        //System.out.println("file" + thisFile);
	        File firstDirectory = new File(_dir);
	        File[] sourceDirFilesArray = firstDirectory.listFiles();
	        for (int f = 0; f < sourceDirFilesArray.length; f++) {
	            File daFile = sourceDirFilesArray[f];
	            System.out.println("File: " + daFile.getName());
	            if (daFile.isDirectory()) {
	                if (_deeper) {
	                	getPicturesInFileDirectory(daFile.getName(),_deeper); //recursive
	                }
	            } else {
	                String namer = daFile.getName().toLowerCase();
	                if (namer.endsWith(".jpg") || namer.endsWith(".gif")|| namer.endsWith(".png") ){
	                    BufferedImage bi = null;
						try {
							bi = ImageIO.read(daFile);
						} catch (IOException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
	                    pictures.add(bi);
	                }
	            }
	        }

	        setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
	        return pictures;
	    }

}