import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.util.ArrayList;

import javax.swing.JFrame;

/*
 * Main class for asteroids game.
 */
public class Asteroids 
{
	private Ship ship;
	private ArrayList<Asteroid> asteroids;
	private ArrayList<Bullet> bullets;
	private int score;
	
	public static void main(String[] args) 
	{
		Asteroids game = new Asteroids();
				
		AsteroidsFrame frame = new AsteroidsFrame(game);
		frame.setSize(600,600);
		frame.setTitle("Asteroids");	
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);	

	}
	
	public Asteroids()
	{	score = 0;
		ship = new Ship(200,200,0,0,30,30,0,0,5);
		asteroids = new ArrayList<Asteroid>();
		// Add three asteroids of different sizes
		// Level 3
		Asteroid asteroid = new Asteroid(100,100,0,0,60,60,3);
		asteroids.add(asteroid);
		// Level 2
		asteroid = new Asteroid(200,100,0,0,40,40,2);
		asteroids.add(asteroid);
		// Level 1
		asteroid = new Asteroid(300,100,0,0,20,20,1);
		asteroids.add(asteroid);
		
		bullets = new ArrayList<Bullet>();
		Bullet bullet = new Bullet(212,180,0,0);
		bullets.add(bullet);
	}
	
	public void draw(Graphics2D g2)
	{
		// Draw the ship
		ship.draw(g2);
		
		// Draw the asteroids
		for (int i =0; i < asteroids.size(); i++)
		{	Asteroid asteroid = asteroids.get(i);
			asteroid.draw(g2);
		}
		
		// Draw the bullets
		for (int i =0; i < bullets.size(); i++)
		{	Bullet bullet = bullets.get(i);
			bullet.draw(g2);
		}
		
		// Draw the score
		g2.drawString("Score: "+score, 500, 20);
	}
	
	/**
	 * Rotates a shape around a point.  This should be the midpoint of the shape.
	 * @param x
	 * @param y
	 * @param shape
	 * @param degrees
	 * @return
	 */
	public static Shape rotateShape(int x, int y, Shape shape, int degrees)
	{
		AffineTransform transform = new AffineTransform();	    
	    transform.rotate(degrees*Math.PI/180,x ,y);

	    return transform.createTransformedShape(shape);
	}
}