import geofasc.swing.tool.Calculator;
import geofasc.swing.tool.Canvas;
import geofasc.swing.tool.Frame;

import javax.swing.SwingUtilities;

/**
 * Ein <code>BulletsMover</code> stellt ein Hauptprogramm dar,
 * in dem mehrere {@link Bullet}s erzeugt, bewegt und dargestellt
 * werden.
 *
 */
public class BulletsMover {
   
   private Bullet[] mBullets;
   private Thread mMovingThread; // Thread fuer die nebenlaeufige Bewegung aller Bullets
   private Frame mFrame;

   /**
    * Erzeugt einen neuen <code>BulletsMover</code>.   
    */
   public BulletsMover() {
      mBullets = new Bullet[20];
      mFrame = new Frame("Bullets");
      mMovingThread = null;
      init();
      mFrame.setCenterLocation();
      mFrame.setVisible(true);
   }

   /**
    * Fuehrt diverse initiale Operationen aus.   
    */
   private void init() {
      Canvas canvas = mFrame.getCanvas();

      double direction = 13;
      int x, y, diameter;
      Calculator calc = new Calculator();
      
      for (int i = 0; i < mBullets.length; i++, direction += 11) {
         x = calc.randomInt(10, 620);
         y = calc.randomInt(20, 460);
         diameter = calc.randomInt(5, 20);

         mBullets[i] = new Bullet(x, y, diameter, direction, canvas);
      }

      for (int i = 0; i < mBullets.length; i++) {
         for (int j = 0; j < mBullets.length; j++) {
            if (i != j)
               mBullets[i].addNeighbour(mBullets[j]);
         }
      }
   }
   
   /**
    * Erzeugt einen Thread, in dem alle Bullets nebenlaeufig bewegt werden.
    */
   public void move() {
      if (mMovingThread == null) {
         mMovingThread = new Thread() {

            @Override
            public void run() {
               try {
                  while (true) {
                     if (isInterrupted())
                        break;
                     
                     for (Bullet bullet : mBullets) {
                        bullet.move();
                     }
                     sleep(50);
                  }
               }// try
               catch (Exception e) {
               }
            }
         };

         mMovingThread.start();
      }
   }

   /**
    * Stoppt die nebenlaeufige Bewegung der Bullets.
    */
   public void stop() {
      if (mMovingThread != null) {
         mMovingThread.interrupt();
         mMovingThread = null;
      }
   }
   
   /**
    *    Hauptmethode zum Ausfuehren des Programms.
    */
   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {

         @Override
         public void run() {
            BulletsMover bm = new BulletsMover();
            bm.move();
         }
      });

   }
   
}