PTDTower V1

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

/**
 * Write a description of class Tower here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Tower extends Actor
{
    private long pauseTime;
    public Tower()
    {
        GreenfootImage image = getImage();
        image.scale(image.getWidth() * 2, image.getHeight() * 2);
        pauseTime = 0;
    }

    /**
     * Act - do whatever the Tower wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act()
    {
        fire();
    }

    public Actor canFire()
    {
        List<Actor> list = getObjectsInRange(100, Enemy.class);
        World world = getWorld();
        if(list.size() == 0)
        {
            return null;
        }
        else
        {
            Actor enemy = list.get(0);
            return enemy;
        }
    }

    public void fire()
    {
        if(running())
        {
            if(canFire() != null)
            {

                getWorld().addObject(new Shot(), getX(),getY());
            }
        }
        pause(300);
    }

    public boolean running()
    {
        long time = System.currentTimeMillis();
        return time > pauseTime;
    }

    public void pause(long delay)
    {
        long time = System.currentTimeMillis();
        pauseTime = time + delay;
    }

}