import greenfoot.*;  

public class MyWorld extends World
{
    
     
    public static GreenfootSound music = new GreenfootSound("bg.wav");
     
     
     public void bgMusic()
     {  
         if (MyWorld.aliveScore.getValue()==0)
         { 
             music.stop();
            }
         else
         {
             music.playLoop();
            }
        }
        

    public MyWorld()
    {    
        // Create a new world with 600x400 cells with a cell size of 1x1 pixels.
        super(600, 400, 1); 
        prepare();
        
        
        
      
    }
    
    public void act(){
      
      this.createEnemy();
      this.createLaserEnemy();
      this.bgMusic();

    }
    
    /**
     * Prepare the world for the start of the program.
     * That is: create the initial objects and add them to the world.
     */
    
    public static Counter score = new Counter("Score : ");
    public static Alive aliveScore = new Alive ("Alive : ");
    private void prepare()
    {
        Hero hero = new Hero();
        addObject(hero,70,200);

        addObject(score,50,20);
        score.setValue(0);

        addObject(aliveScore,150,20);
        aliveScore.setValue(5);

    }
    
      
    int enemyCounter=0;
    private void createEnemy(){
        enemyCounter++;
        
        if (enemyCounter==60){
            Enemy enemy = new Enemy(Greenfoot.getRandomNumber(7)+1);
            addObject(enemy, 600, Greenfoot.getRandomNumber(400));
            enemyCounter = 0;
        }
    }
    
   int LaserEnemyCounter=0;
    private void createLaserEnemy(){
        LaserEnemyCounter++;
        
        if (LaserEnemyCounter==60){
            LaserEnemy enemy = new LaserEnemy(Greenfoot.getRandomNumber(10)+1);
            addObject(enemy, 600, Greenfoot.getRandomNumber(400));
            LaserEnemyCounter = 0;
        }
    }
    
    
    
}