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

/**
 * The bloodstream is the setting for our White Blood Cell scenario. 
 * It's a place where blood cells, bacteria and viruses float around.
 * 
 * @author Brennan Eppinger
 * @version 10/30/2017
 */
public class Bloodstream extends World
{
    private int score;
    private int time;
    private static final String bgImageName = "background.png";
    private static final double scrollSpeed = 2.5;
    private static final int picWidth = (new GreenfootImage(bgImageName)).getWidth();
    private GreenfootImage bgImage, bgBase;
    private int scrollPosition = 0;
    GreenfootSound bgMusic = new GreenfootSound("ground-music.mp3");
    /**
     * Constructor: Set up the staring objects.
     */
    public Bloodstream()
    {    
        super(780, 360, 1); 
        prepare();
        score = 0;
        time = 7000;
        showScore();
        showTime();
        setBackground(bgImageName);
        bgImage = new GreenfootImage(getBackground());
        bgBase = new GreenfootImage(picWidth, getHeight());
        bgBase.drawImage(bgImage, 0, 0);

        
    }
    public void started()
    {
    bgMusic.playLoop();
    }
    public void stopped()
    {
    bgMusic.pause();
    }
    public void act()
    {
        if (Greenfoot.getRandomNumber(100) < 1)
        {
            addObject(new Coin(), 779, Greenfoot.getRandomNumber(360));
        }
        
          if (Greenfoot.getRandomNumber(1000) < 6)
        {
            addObject(new Virus(), 779, Greenfoot.getRandomNumber(360));
        }
        
          
        
        started();
        countTime ();
        scrollPosition -= scrollSpeed;
        while(scrollSpeed > 0 && scrollPosition < -picWidth) scrollPosition += picWidth;
        while(scrollSpeed < 0 && scrollPosition > 0) scrollPosition -= picWidth;
        paint(scrollPosition);
    }
    private void paint(int position)
    {
        GreenfootImage bg = getBackground();
        bg.drawImage(bgBase, position, 0);
        bg.drawImage(bgImage, position + picWidth, 0);
    }
    public void addScore(int points)
    {
        score = score + points;
        showScore();
        if (score < 0) 
        {
            Greenfoot.playSound("game-over.wav");
            Greenfoot.stop();
        }
    }
    private void showScore()
    {
        showText("Score: " + score, 80, 25);
         score = score + 20;
    }
    private void countTime()
    {
        time--;
        showTime();
        if (time == 0)
        {
            showEndMessage();
            Greenfoot.stop();
        }
         showText("Zeit: " + time, 700, 25);
    }
    
    private void showTime()
    {
        showText("Zeit: " + time, 700, 25);
    }
    private void showEndMessage()
    {
        Greenfoot.playSound("win.mp3");
        showText("Die Zeit ist um!", 390, 150);
        showText("Dein Score: " + score + " points", 390, 170);
    }
    
    private void prepare()
    {
        Mario mario = new Mario();
        addObject(mario, 97, 179);
    }
}