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

public class Laser extends Actor
{
    public int alien_counter = 4;
    private ScoreBoard score;

    public Laser(ScoreBoard score)
    {
        this.score = score;
    }

    public void act() 
    {
        move(5);
        Defeat();
        RemovingLaser();
    }    

    public void Defeat() {
        // Removes alien if laser is touching it  
        if (isTouching(Alien.class)) {
            removeTouching(Alien.class);
            alien_counter = alien_counter - 1;
            score.addStar();
        }
    }

    public void RemovingLaser() {
        if (isAtEdge() || isTouching(FinalBoss.class)) {
            getWorld().removeObject(this);
        }
    }
}

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

public class Ship extends Actor
{
    // True or false statement for touching other actors
    boolean touchingAlien = false;
    boolean touchingFinalBoss = false;
    boolean touchingBossLaser = false;

    private ScoreBoard score;

    public Ship(ScoreBoard score)
    {
        this.score = score;
    }

    public void act() 
    {
        movement();
        Boundry();
        hitAlien();
        hitFinalBoss();
    }  

    public void movement() {
        // User input for navigating ship
        if (Greenfoot.isKeyDown("up")) {
            setLocation(getX(), getY() - 5);
        }

        if (Greenfoot.isKeyDown("down")) {
            setLocation(getX(), getY() + 5);
        }

        if (Greenfoot.isKeyDown("right")) {
            setLocation(getX() + 5, getY());
        }

        if (Greenfoot.isKeyDown("left")) {
            setLocation(getX() - 5, getY());
        }
        // User input for shooting lasers (works when key is lifted)
        if ("space".equals(Greenfoot.getKey())) {
            shoot();
        }
    }

    public void shoot() {    
        getWorld().addObject(new Laser(score), getX(), getY());
    }

    public void hitAlien() {
        // Define the actor as the ship touching an alien
        Actor alien = getOneIntersectingObject(Alien.class);
        if (alien != null) {
            World myWorld = getWorld();
            MyWorld myworld = (MyWorld)myWorld;
            HealthBar healthbar = myworld.getHealthBar();
            if (touchingAlien == false) {
                healthbar.loseHealth();
                touchingAlien = true;   
                if (healthbar.health <= 0) {
                    // Game over since health has hit 0
                    myWorld.removeObject(this);
                    Greenfoot.setWorld(new GameOver());
                }
            }

            else {
                // Continue game 
                touchingAlien = false;
            }
        }
    }

    public void hitFinalBoss() {
        if (getWorld() != null) {
            Actor finalboss = getOneIntersectingObject(FinalBoss.class);
            Actor bosslaser = getOneIntersectingObject(BossLaser.class);
            if (finalboss != null || bosslaser != null) {
                World finalWorld = getWorld();
                FinalWorld finalworld = (FinalWorld)finalWorld;
                HealthBar healthbar = finalworld.getHealthBar();
                if (touchingFinalBoss == false || touchingBossLaser == false) {
                    healthbar.loseHealth();
                    touchingFinalBoss = true;   
                    touchingBossLaser = true;
                    if (healthbar.health <= 0) {
                        // Game over since health has hit 0
                        finalWorld.removeObject(this);
                        Greenfoot.setWorld(new GameOver());
                    }
                }

                else {
                    // Continue game 
                    touchingFinalBoss = false;
                    touchingBossLaser = false;
                }
            }
        }
    }

    public void Boundry() {
        if (getX() > 980) {
            setLocation(980, getY());
        }
        if (getX() < 0) {
            setLocation(0, getY());
        }
        if (getY() > 575) {
            setLocation(getX(), 575);
        }
        if (getY() < 0) {
            setLocation(getX(), 0);
        }
    }
}