import greenfoot.*; 

public class Starship extends Actor
{ 
    private int count = 2;
    private boolean gotPowerup1=false;
    private boolean gotPowerup2=false;
    private boolean gotPowerup3=false;

    public void act()
    {
        move(0);
        checkKeys();        
        Powerup();

    }

    /**
     * Press Keys to Move
     * getOneObjectAtOffset (x,y,Name.class) == null     prüft ob Objekt der Klasse neben Starship ist
     */
    public void checkKeys()
    {   
        if (Greenfoot.isKeyDown("left"))
        {setLocation(getX() -6,getY());
        }

        if (Greenfoot.isKeyDown("right")
        && getOneObjectAtOffset(5,0, Menu.class) == null) // wenn rechts Menu dann stoppe
        {setLocation(getX() +6,getY());
        }

        if (Greenfoot.isKeyDown("up"))
        {setLocation(getX(),getY() -6);
        }

        if (Greenfoot.isKeyDown("down"))
        {setLocation(getX(),getY() +6);
        }

        if ("space".equals(Greenfoot.getKey()))
        {
            fire();
        }
    }

    public void fire()
    { Bullet bullet = new Bullet();                         //schießen (object create)
        getWorld().addObject(bullet,getX(),getY());         
        bullet.setRotation(-90);//objektrichtung anch oben richten
    }

    public void getShield()
    {
        count--;
        if (count == 0) 
        {getWorld().addObject ( new Shield(), getX(), getY());
            count=2;
        }
    }

    public void Powerup()
    {
        Actor Powerup1 = this.getOneObjectAtOffset (1,1, Powerup1.class); //Code verkürzen
        Actor Powerup2 = this.getOneObjectAtOffset (1,1, Powerup2.class); //Code verkürzen
        Actor Powerup3 = this.getOneObjectAtOffset (1,1, Powerup3.class); //Code verkürzen 
        if (Powerup1 != null)
        {
            getWorld().removeObject(Powerup1); //Powerup1 entfernen

        }

        else if (Powerup2 != null)
        {
            getWorld().removeObject(Powerup2); //Powerup2 entfernen
            gotPowerup2 = true;
        }

        else  if (Powerup3 != null)
        {
            getWorld().removeObject(Powerup3); //Powerup3 entfernen

        }
    }

    public void Powerup2_activated()
    {if (gotPowerup2 =true)
        {getShield();
        }

    }
}