// WARNING: This file is auto-generated and any changes to it will be overwritten
import java.util.*;
import greenfoot.*;
import java.awt.Color;

/**
 * 
 */
public class Roomba extends Actor
{
    /* constants. speed + capacity + sensingRadius/10 must be 20 or less*/
    private static final int speed = 1;
    private static final int capacity = 8;
    private static final int sensorRadius = 11;
    /* variables*/
    private int capacityLeft = capacity;
    private int dirtCounter = 0;
    private int unloadingDelay = 0;
    /* every Roomba has a Base*/
    public Base myBase = null;
    /* a list with dirt around the Roomba (useful for sensing?)*/
    private List<Dirt> dirtInRange;
    private List<Barrier> barrierInRange;

    /**
     * 
     */
    public void act()
    {
        /* the next three lines are required for the delay while unloading the dirt*/
        if (unloadingDelay > 0) {
            unloadingDelay = unloadingDelay - 1;
            return;
        }
        /* the next three lines check whether all dirt (25 pieces) has been removed*/
        if (dirtCounter == 25) {
            Greenfoot.stop();
        }
        move();
        clean();
        sense();
        if (capacityLeft == 0) {
            dump();
        }
        if (capacityLeft > 10) {
            sense();
        }
    }

    /**
     * 
     */
    public void move()
    {
        move(speed);
        Actor Barrier = getOneObjectAtOffset(getX(), getY() + getImage().getHeight() * 2, Barrier.class);
        if (Barrier != null) {
            setLocation(getX(), getY() + 5);
        }
        if (isTouching(Barrier.class)) {
            turn(160);
        }
        if (isAtEdge()) {
            turn(Greenfoot.getRandomNumber(180));
        }
    }

    /**
     * 
     */
    public void clean()
    {
        if (isTouching(Dirt.class) && capacityLeft > 0) {
            removeTouching(Dirt.class);
            capacityLeft = capacityLeft - 1;
            dirtCounter = dirtCounter + 1;
        }
    }

    /**
     * 
     */
    public void sense()
    {
        List<Dirt> dirtInRange = getObjectsInRange(sensorRadius, Dirt.class);
        List<Barrier> barrierInRange = getObjectsInRange(10, Barrier.class);
        List<Barrier> intersectingActorsList = getIntersectingObjects(Barrier.class);
        if ( ! dirtInRange.isEmpty()) {
            Dirt firstActor = dirtInRange.get(0);
            turnTowards(firstActor.getX(), firstActor.getY());
        }
        if ( ! intersectingActorsList.isEmpty() &&  ! dirtInRange.isEmpty()) {
            Barrier firstActor = intersectingActorsList.get(0);
            setLocation(getX(), getY() + 5);
        }
        else if ( ! barrierInRange.isEmpty()) {
            if ( ! barrierInRange.isEmpty() &&  ! dirtInRange.isEmpty()) {
                Barrier firstActor = barrierInRange.get(0);
                move(-4);
            }
        }
    }

    /**
     * 
     */
    public void dump()
    {
        turnTowards(myBase.getX(), myBase.getY());
        move();
        if (isTouching(Base.class)) {
            unload();
        }
    }

    /**
     * 
     */
    public void unload()
    {
        capacityLeft = capacity;
        unloadingDelay = 1000;
    }
}