import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
import java.net.*;

public class Imager {

	// window(): displays and returns a window with image icon
	public static JFrame window( ImageIcon icon ) {
		int w = icon.getImage().getWidth( null ) + 10;
		int h = icon.getImage().getHeight( null ) + 35;
		JFrame frame = Window.make( "Photo", w, h, Color.black, true, false );
		Container pane = frame.getContentPane();
		JLabel picture = new JLabel( icon );
		pane.add( picture );
		frame.setVisible(true);
		return frame;
	}

	// window(): displays and returns a window with image and title
	public static JFrame window( String title, String iconname ) {
		ImageIcon icon = Imager.getImage( iconname );
		int w = icon.getImage().getWidth( null ) + 10;
		int h = icon.getImage().getHeight( null ) + 35;
		JFrame frame = Window.make( title, w, h, Color.black, true, false );
		Container pane = frame.getContentPane();
		JLabel picture = new JLabel( icon );
		pane.add( picture );
		frame.setVisible(true);
		return frame;
	}

	// getPixels(): gets grid of pixels making up the image
	public static int[][] getPixels( ImageIcon icon ) {
		Image image = icon.getImage();

		GraphicsEnvironment ge =
						GraphicsEnvironment.getLocalGraphicsEnvironment();
		
		BufferedImage buffer = null;

		try {
			int transparency = Transparency.OPAQUE;
		
			GraphicsDevice gs = ge.getDefaultScreenDevice();
			GraphicsConfiguration gc = gs.getDefaultConfiguration();
			buffer = gc.createCompatibleImage(
					image.getWidth(null), image.getHeight(null), transparency);
		}
		catch (HeadlessException e) {
		}
		
		if ( buffer == null ) {
			buffer = new BufferedImage( image.getWidth(null),
							image.getHeight(null), BufferedImage.TYPE_INT_RGB );
		}

		Graphics g = buffer.createGraphics();
		
		g.drawImage(image, 0, 0, null);
		g.dispose();

		int width = buffer.getWidth();
		int height = buffer.getHeight();

		int[][] grid = new int[ width ][ height ];

		for ( int x = 0; x < width; ++x ) {
			for ( int y = 0; y < height; ++y ) {
				grid[ x ][ y ] = buffer.getRGB( x, y );
			}
		}

		return grid;
	}

	// setPixels(): resets the pixels of the image according to the grid
	public static void setPixels( ImageIcon icon, int[][] grid ) {
		int width = grid.length;
		int height = grid[0].length;

		BufferedImage buffer = new BufferedImage(
				width, height, BufferedImage.TYPE_INT_RGB );

		for ( int x = 0; x < width; ++x ) {
			for ( int y = 0; y < height; ++y ) {
				int pixel = grid[ x ][ y ];
				buffer.setRGB( x, y, pixel );
			}
		}

		icon.setImage( buffer );
	}

	// popup(): displays a popup for the image
	public static void popup( ImageIcon icon ) {
		Imager.popup( icon, "" );
	}

	// popup(): displays a popup for the image
	public static void popup( ImageIcon icon, String title ) {
		JOptionPane.showMessageDialog(
			null, "", title, JOptionPane.INFORMATION_MESSAGE, icon );
	} 

 	// getImage(): returns an image of someone from class folder
	public static ImageIcon getImage( String s ) {
		try {
			String BASE = "http://www.cs.virginia.edu/cs101x/people/" ;
			String name = BASE + s + "/picture.jpg";
			URL u = new URL( name );
			return new ImageIcon( u );
		}
		catch ( Exception e ) {
			return null;
		}
	}
 }