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

public class Enemy extends Actor
{
    int targetX;
    int targetY;
    
    boolean targetReached = false;
    
    int speed = 3;
    public Enemy (int targetX, int targetY) {
        this.targetX = targetX;
        this.targetY = targetY;
    }
    
    int shootTimer;
    public void act()
    {
        shootAtPlayer();
        if (!targetReached){
            moveToTargetLocation(targetX, targetY);            
        }

    }
    
    public void moveToTargetLocation(int targetX,  int targetY){
        double dx = targetX - getX();
        double dy = targetY - getY();
        double distance = Math.sqrt(Math.pow(dx, 2) + Math.pow(dy, 2));
        if (distance < 2){
            targetReached = true;
        }
        setLocation(getX() + (int)(dx/distance*speed), getY() + (int)(dy/distance*speed));
    }
    
    public void shootAtPlayer(){
        Player player = getWorld().getObjects(Player.class).get(0);
        shootTimer++;
        if (player.getX() - getX() < 0){
            setImage("Enemy.png");
        } else if (player.getX() - getX() > 0){
            setImage("EnemyRight.png");
        }
        if (shootTimer >= 100){
            EnemyProjectile enemyProjectile = new EnemyProjectile();
            getWorld().addObject(enemyProjectile, getX(), getY());
            enemyProjectile.turnTowards(player.getX(), player.getY());
            shootTimer = 0;
        }
    }
}