import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class PlayerProjectile here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class PlayerProjectile extends Actor
{
    /**
     * Act - do whatever the PlayerProjectile wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act()
    {
        move(7);
        checkForEnemyCollision();
        if (!isProjectileOnScreen()){
            getWorld().removeObject(this);
        }
    }
    
    public void checkForEnemyCollision(){
        if (getOneIntersectingObject(Enemy.class) != null){
            getWorld().removeObject(getOneIntersectingObject(Enemy.class));
        }
    }
    
    public boolean isProjectileOnScreen(){
        //Check Y-Value
        if (getY() <= 0 || getY() >= getWorld().getHeight()-1){
            return false;
        }
        //Check X-Value
        if (getX() <= 0 || getX() >= getWorld().getWidth()-1){
            return false;
        }
        return true;
    }
}