import java.awt.*;
import java.awt.event.*;
import java.util.Date;
import physics2D.*;

class SpaceBattle extends Frame implements KeyListener, MouseListener, WindowListener {

   public static void main(String[] args)
   {
      SpaceBattle sb = new SpaceBattle();
   }

   // --------------------------------------------------------------------------------
   //   Data Members
   // --------------------------------------------------------------------------------

   private Space space;
   private Insets insets;
   private int windowWidth = 800, windowHeight = 600,
               increment = 100, maxIncrement = 100,
               gameWidth, gameHeight;
   private boolean loop;
   private Graphics2D graphics2D;
   private Date startTime, endTime;

   // --------------------------------------------------------------------------------
   //   Constructor
   // --------------------------------------------------------------------------------

   public SpaceBattle() {

      // call parent constructor
      super("SpaceBattle v0.000000001");

      // set frame properties
      insets = getInsets();
      gameWidth = windowWidth - insets.left - insets.right;
      gameHeight = windowHeight - insets.top - insets.bottom;
      setSize(windowWidth, windowHeight);
      setResizable(false);
      Toolkit toolkit = Toolkit.getDefaultToolkit();
      int xLocation = (toolkit.getScreenSize().width - windowWidth) / 2;
      int yLocation = (toolkit.getScreenSize().height - windowHeight) / 2;
      setLocation(xLocation,yLocation);
      setBackground(Color.black);
      show();
      graphics2D = (Graphics2D) getGraphics();
      validate();
      reset();

      // regester this frame as its own key and window listener
      addWindowListener(this);
      addKeyListener(this);

      // start infinate loop
      startTime = new Date();
      run();

   }

   // --------------------------------------------------------------------------------
   //   Methods
   // --------------------------------------------------------------------------------

   public void run() {
      loop = true;
      while (true)
      while (loop)
      {
         space.advanceTime(increment);
         graphics2D.drawImage(space.getImage(), insets.left, insets.top, this);
         endTime = new Date();
         System.out.println(increment + " " + (int) (endTime.getTime() - startTime.getTime()));
         increment = (int) (increment + endTime.getTime() - startTime.getTime()) / 2;
         if (increment > maxIncrement) {
            increment = maxIncrement;
         }
         startTime.setTime(endTime.getTime());
      }
   }

   private void reset() {
      space = new Space(gameWidth, gameHeight, createImage(gameWidth, gameHeight));
   }

   // implementation of mouse listener
   public void mouseClicked(MouseEvent event) {}
   public void mouseEntered(MouseEvent event) {}
   public void mouseExited(MouseEvent event) {}
   public void mousePressed(MouseEvent event) {}
   public void mouseReleased(MouseEvent event) {}

   // implementation of key listener
   public void keyTyped(KeyEvent event) {}

   public void keyReleased(KeyEvent event) {
      if (event.getKeyCode() == KeyEvent.VK_UP) {
         space.getUserShip().thrusterOff();
      }
      else if (event.getKeyCode() == KeyEvent.VK_LEFT || event.getKeyCode() == KeyEvent.VK_RIGHT || event.getKeyCode() == KeyEvent.VK_DOWN) {
         space.getUserShip().stopTurn();
      }
      else if (event.getKeyCode() == KeyEvent.VK_SPACE || event.getKeyCode() == KeyEvent.VK_F3) {
         if (loop == false)
             loop = true;
      }
      else if (event.getKeyCode() == KeyEvent.VK_P) {
         loop = false;
      }
      else if (event.getKeyCode() == KeyEvent.VK_F2) {
         reset();
      }
   }

   public void keyPressed(KeyEvent event) {
      if (event.getKeyCode() == KeyEvent.VK_UP) {
         space.getUserShip().thrusterOn();
      }
      else if (event.getKeyCode() == KeyEvent.VK_LEFT) {
         space.getUserShip().turnLeft();
      }
      else if (event.getKeyCode() == KeyEvent.VK_RIGHT) {
         space.getUserShip().turnRight();
      }
   }

   // implementation of window listener to activate close button
   public void windowClosing(WindowEvent event) {
      loop = false;
      dispose();
      System.exit(0);
   }
   public void windowActivated(WindowEvent event) {}
   public void windowClosed(WindowEvent event) {}
   public void windowDeactivated(WindowEvent event) {}
   public void windowDeiconified(WindowEvent event) {}
   public void windowIconified(WindowEvent event) {}
   public void windowOpened(WindowEvent event) {}

}