import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.Timer;

import java.awt.image.*;

/**
 * @author Donald Yessick
 * 
 */
@SuppressWarnings("serial")
public class BlueScreenTV extends JComponent implements MouseListener {

	/* BlueScreenTV attributes */
	protected boolean isPowerOn = true; // true = on, false is off
	protected int channel = 1; // we have channel 1 and channel 2
	public String toString(){
		return ( (isPowerOn)?  "Channel "+channel: "off");
	}

	public void pushPowerButton() {
		isPowerOn = !isPowerOn; // toggle power
	}

	public void changeChannel() {
		channel = channel % 2 + 1;
	}

	private static BufferedImage tv, blueTube, pictureChannel1,	pictureChannel2, pictureChannel; //images
	private static URL urlTV, urlBlueTube, urlChannel1, urlChannel2; //urls for images
	private static float scaleCh1, scaleCh2, scale; //will use this to render
	private AffineTransform affineTransformChannel1 = new AffineTransform();
	private AffineTransform affineTransformChannel2 = new AffineTransform();

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		try {
			urlTV = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/Panasonic1952.PNG");
			urlBlueTube = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/Panasonic1952BlueTube.PNG");
			urlChannel1 = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/AmalienborgPalace.jpg");
			urlChannel2 = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/MarsLander.jpg");

			tv = ImageIO.read(urlTV);
			blueTube = makeColorTransparent(ImageIO.read(urlBlueTube), new Color(0, 255, 255));
			pictureChannel1 = ImageIO.read(urlChannel1);
			pictureChannel2 = ImageIO.read(urlChannel2);

		} catch (MalformedURLException badUrl) {
			badUrl.printStackTrace();
			System.out.println("ABORTING: " + badUrl.toString());
			System.exit(0);
		} catch (IOException ioError) {
			ioError.printStackTrace();
			System.out.println("ABORTING: " + ioError.toString());
			System.exit(0);
		} catch (Exception otherError) {// this alone is sufficient
			otherError.printStackTrace();
			System.out.println("ABORTING: " + otherError.toString());
			System.exit(0);
		}

		int top = 67;
		int bottom = 158;
		int ht = bottom-top;
		scaleCh1 = (float)(pictureChannel1.getHeight()) / (float)(ht);
		scaleCh2 = (float)(pictureChannel2.getHeight()) / (float)(ht);
		
		BlueScreenTV tv = new BlueScreenTV();
		tv.getWindow().setVisible(true);
		tv.timer.start();
	}
	public static void lab13(BlueScreenTV subclass) {

		try {
			urlTV = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/Panasonic1952.PNG");
			urlBlueTube = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/Panasonic1952BlueTube.PNG");
			urlChannel1 = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/AmalienborgPalace.jpg");
			urlChannel2 = new URL(
					"http://dyessick.com/Coastal/Spring2008/csci140lab/images/MarsLander.jpg");

			tv = ImageIO.read(urlTV);
			blueTube = makeColorTransparent(ImageIO.read(urlBlueTube), new Color(0, 255, 255));
			pictureChannel1 = ImageIO.read(urlChannel1);
			pictureChannel2 = ImageIO.read(urlChannel2);

		} catch (MalformedURLException badUrl) {
			badUrl.printStackTrace();
			System.out.println("ABORTING: " + badUrl.toString());
			System.exit(0);
		} catch (IOException ioError) {
			ioError.printStackTrace();
			System.out.println("ABORTING: " + ioError.toString());
			System.exit(0);
		} catch (Exception otherError) {// this alone is sufficient
			otherError.printStackTrace();
			System.out.println("ABORTING: " + otherError.toString());
			System.exit(0);
		}

		int top = 67;
		int bottom = 158;
		int ht = bottom-top;
		scaleCh1 = (float)(pictureChannel1.getHeight()) / (float)(ht);
		scaleCh2 = (float)(pictureChannel2.getHeight()) / (float)(ht);

		
		BlueScreenTV tv = subclass;
		tv.getWindow().setVisible(true);
		tv.timer.start();
	}

	/**
	 * getWindow is a helper to keep main clean and simple handles the details
	 * of creating a window for our JComponent
	 * 
	 * @returns a window with our component
	 */
	private JFrame window;
	private JFrame getWindow() {
		// this is the lab8 object
		if (window != null) return window;
		window = new JFrame(this.toString());
		window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		window.setSize(tv.getWidth(), tv.getHeight());
		window.setContentPane(this);
		window.addMouseListener(this);
		return window;
	}

	public void paintComponent(Graphics oldGraphics) {
		Graphics2D g = (Graphics2D) oldGraphics;
		this.getWindow().setTitle(this.toString());
		
		if (!isPowerOn){ 
			g.drawImage(tv,0,0,null);
			return;
		}
		try{
			AffineTransform reset = g.getTransform();
			switch (channel){
			case(1):
				pictureChannel = pictureChannel1;
				g.setTransform(affineTransformChannel1);
				scale = scaleCh1;
				break;
			case(2):
				pictureChannel = pictureChannel2;
				g.setTransform(affineTransformChannel2);
				scale = scaleCh2;
				break;
			default:
				throw new Exception("invalid channel");
			}
			playChannel(g, pictureChannel);		
			g.setTransform(reset);

		} catch (Exception badChannel) {// this alone is sufficient
			badChannel.printStackTrace();
			System.out.println("ABORTING: " + badChannel.toString());
			System.exit(0);
		}		
		g.drawImage(blueTube,0,0,null);
	}

	/**
	 * paintImage is a helper function that paints an image. This method has
	 * some nastiness to it. putting it all in paintComponent would simply make
	 * that method nasty too.
	 * 
	 * @param g
	 *            Graphics2D on which to draw the image
	 * @param stringURL
	 *            universal resource locator for image
	 */
	private void playChannel(Graphics2D g, BufferedImage theImage) {
		int imageWidth = theImage.getWidth();
		int imageHeight = theImage.getHeight();
		//scales and draws image on the fly
		int top = 67;
		int bottom = 158;
		//int ht = bottom-top;
		//scale = (float)imageHeight / (float)(ht);
		int left = tv.getWidth()/3+1;
		int right =left+(int)((float)(imageWidth)*scale);
		
		g.drawImage(
				//the image
				theImage,
				//top left coordinate to place image
				left,top, 
				////bottom right coordinate to scale image
				right, bottom,
				//where to start in the image --you can choose part of the image
				0, 0, 
				//where to end in the image --you can choose part of the image
				imageWidth,imageHeight,
				//transparent fill color, e.g. Color.YELLOW, leave as null, or omit to leave transparent
				null,
				//ImageObserver -- null will do -- can be used to alert when
				null
			); 

	}


	public static BufferedImage makeColorTransparent(BufferedImage bim,
			final Color color) {
		ImageFilter filter = new RGBImageFilter() {
			// the color we are looking for... Alpha bits are set to opaque
			public int markerRGB = color.getRGB() | 0xFF000000;

			public final int filterRGB(int x, int y, int rgb) {
				if ((rgb | 0xFF000000) == markerRGB) {// Mark the alpha bits
														// as zero - transparent
					return 0x00FFFFFF & rgb;
				} else {// nothing to do
					return rgb;
				}
			}
		};
		ImageProducer ip = new FilteredImageSource(bim.getSource(), filter);
		Image im = Toolkit.getDefaultToolkit().createImage(ip);
		return convert(im);
	}
	static public BufferedImage convert(Image im) {
		BufferedImage bi = new BufferedImage(im.getWidth(null), im
				.getHeight(null), BufferedImage.TYPE_4BYTE_ABGR);
		Graphics bg = bi.getGraphics();
		bg.drawImage(im, 0, 0, null);
		bg.dispose();
		return bi;
	}

	/* (non-Javadoc)
	 * @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
	 */
	@Override
	public void mouseClicked(MouseEvent mouseEvent) {
		int x = mouseEvent.getX();
		int y = mouseEvent.getY();
		//System.out.print(x); System.out.print(",");	System.out.println(y);
		
		if (x < 110 || x > 252) return; //x bounds
		if (y < 240 || y > 260) return; //y bounds
		
		if (x < 130) 
			channel = 1;
		if (x > 217) 
			channel = 2;
		
		if (x < 151 || x > 197) return; //new x bounds
		if (y < 246 || y > 256) return; //new y bounds
		if (x < 165) 
			isPowerOn=true;
		if (x > 185) 
			isPowerOn=false;				
	}


	/**
	 * timer forces repainting (with new rotation) every 15000 milliseconds (15
	 * seconds)) this is syntactically ugly so don't get hung up on it key idea,
	 * repaint(), forces the screen to repaint
	 */
	protected Timer timer = new Timer(33, new ActionListener() {
		int t1 = 1;
		int t2 = 1;

		void updateChannel1(){
			int sizeGraphic = (int)((float)(pictureChannel1.getWidth())*scaleCh1)-(tv.getWidth()/3+1);
			t1 = (t1+1)%(2*sizeGraphic);
			if ((t1 / sizeGraphic) % 2 == 0) // change direction periodically
				affineTransformChannel1.translate(-1, 0); // move camera right
			else
				// every odd N iterations
				affineTransformChannel1.translate(1, 0);// move camera left
		}
		void updateChannel2(){
			int sizeGraphic = (int)((float)(pictureChannel1.getWidth())*scaleCh1)-(tv.getWidth()/3+1);
			t2 = (t2+1)%(2*sizeGraphic);
			if ((t2 / sizeGraphic) % 2 == 0) // change direction periodically
				affineTransformChannel2.translate(-1, 0); // move camera right
			else
				// every odd N iterations
				affineTransformChannel2.translate(1, 0);// move camera left
		}
		
		public void actionPerformed(ActionEvent time) {
			if (pictureChannel == null) return;
			updateChannel1();
			updateChannel2();
			repaint();
		}
		
	});

	public void mouseEntered(MouseEvent arg0) {	
		//timer.start();
	}


	public void mouseExited(MouseEvent arg0) {
		//timer.stop();
	}


	public void mousePressed(MouseEvent arg0) {
		//timer.stop();
	}


	public void mouseReleased(MouseEvent arg0) {
		//timer.start();
	}
}