import greenfoot.*;  // (World, Actor, GreenfootImage, and Greenfoot)
import java.awt.Color;
/**
 * An Alien is an alien creature that likes to collect tomatoes.
 * 
 * @author (your name here)
 * @version 0.1
 */
public class Alien extends Creature
{
    // Remember: you cannot extend the Alien's memory. So:
    // no additional fields (other than final fields) allowed in this class!
    /**
     * Default constructor for testing purposes.
     */
    public Alien()
    {
        this(null);
    }

    
    /**
     * Create an Alien with its home space ship.
     */
    public Alien(Ship ship)
    {
        super(ship);
    }

    /**
     * Do what a Alien's gotta do.
     */
    public void act()
    {
        super.act();   // do not delete! leave as first statement in act().
        returnToShip();
        reachedWater();
        bounceOffWalls();
        stopAtTomato();
        if(carryingTomato())
         {
           if(atShip())
            {
                dropTomato();
                reachedWater();
                stopAtTomato();
           }
           else
            {
                move();
                reachedWater();
                turnHome();
                bounceOffWalls();
                stopAtTomato();
           }
        }
        else
         {
            move();
            checkFood();
            reachedWater();
            bounceOffWalls();
            stopAtTomato();
        }
    }

    /**
     * Is there any food here where we are? If so, try to load some!
     */
    public void checkFood()
    {
        // check whether there's a tomato pile here
        TomatoPile tomatoPile = (TomatoPile) getOneIntersectingObject(TomatoPile.class);
        if(tomatoPile != null)
        {
            loadTomato();
            setImage("alien-with-food.png");
            turnHome();
            setFlag(1, true);
            stopAtTomato();
        }
    }


    /**
     * This method specifies the name of the author (for display on the result board).
     */
    public static String getAuthorName()
    {
        return "Keegan Grandel";  // write your name here!
    }


    /**
     * This method specifies the image we want displayed at any time. (No need 
     * to change this for the competition.)
     */
    public String getCurrentImage()
    {
        if(carryingTomato())
        {
            return "alien-with-food.png";
        }
        else
        {
            return "alien.png";
        }
    }
    
    public void bounceOffWalls()
    {
        int yCoord = getY();
        if(yCoord <= 0 || yCoord >= 599)
        {
            turn(45);
        }
        int xCoord = getX();
        if(xCoord <= 0 || xCoord >= 799)
        {
            turn(20);
        }
    }
    
    public void returnToShip()
    {
        Actor ship = getOneIntersectingObject(Ship.class);
        if(ship != null)
        {
            setImage("alien.png");
        }
    }
    
    public void reachedWater()
    {
        if(atWater())
        {
            if(carryingTomato() == true)
            {
                turnHome();
            }
            if(carryingTomato() == false)
            {
                turn(45);
                move();
            }
        }
    }
    
    public void stopAtTomato()
    {
        Alien alien = (Alien) getOneIntersectingObject(Alien.class);
        if(!getFlag(1))
         {
            move();
        }
        else
         {
            if(getFlag(1))
             {
                stop();
            }
        }
    }
    
    public void stop()
    {
        move(0);
    }
}