import java.awt.*;
import java.awt.geom.*;
import java.util.Observable;

/**
 * A painted view displays the game state as 
 * 2D graphics such as lines, shapes, and colors on a JPanel.
 * @author Marty Stepp
 * @version Spring 2011 2011/05/06
 */
public class PaintedView extends View {
	private static final long serialVersionUID = 1L;
	
	/**
	 * Constructs a new painted view to display data from the given game.
	 * @param game the game to display
	 * @pre game != null
	 */
	public PaintedView(Game game) {
		super(game);
	}
	
	/**
	 * Draws this painted view on the screen, painting the state of the game
	 * as a set of 2D graphical shapes.
	 * @param g the graphics pen to use
	 */
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		drawWeapon(g2, getGame().getWeapon1(), 50, 50);
		drawWeapon(g2, getGame().getWeapon2(), 250, 50);
	}
	
	// Draws one player's weapon at the given x/y position.
	private void drawWeapon(Graphics2D g2, Weapon weapon, int x, int y) {
		if (weapon == Weapon.ROCK) {
			Ellipse2D.Double rock = new Ellipse2D.Double(x, y, 50, 50);
			g2.setPaint(Color.GRAY);
			g2.fill(rock);
		} else if (weapon == Weapon.PAPER) {
			Rectangle2D.Double paper = new Rectangle2D.Double(x, y, 50, 50);
			g2.setPaint(Color.WHITE);
			g2.fill(paper);
		} else if (weapon == Weapon.SCISSORS) {
			Ellipse2D.Double handle1 = new Ellipse2D.Double(x, y, 20, 20);
			Ellipse2D.Double handle2 = new Ellipse2D.Double(x, y + 30, 20, 20);
			Line2D.Double blade1 = new Line2D.Double(x + 15, y + 15, x + 50, y + 40);
			Line2D.Double blade2 = new Line2D.Double(x + 15, y + 35, x + 50, y + 10);
			
			g2.setStroke(new BasicStroke(3));
			g2.setColor(Color.YELLOW);
			g2.draw(handle1);
			g2.draw(handle2);
			g2.setColor(Color.LIGHT_GRAY);
			g2.draw(blade1);
			g2.draw(blade2);
		}
		// else weapon == null
	}
	
	/**
	 * Updates the state of this view based on an event that has occurred in
	 * the game model (repaints the view).
	 */
	public void update(Observable o, Object arg) {
		repaint();
	}
}