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

/**
 * Write a description of class Player here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Player extends Actor
{
    int jumpBoostDuration = -1;
    int jumpBoostStrength = 5;
    
    
    private int speed = 6;
    private int currentJumpStrength;
    private int defaultJumpStrength = 15;
    private int gravity = 1;

    private int verticalSpeed = 0;
    private boolean onGround = false;

    public void act()
    {
        collision();
        moveLeftAndRight();
        jump();
        fall();
        handlePowerUps();
    }

    // Bewegung nach links und rechts
    private void moveLeftAndRight()
    {
        if (Greenfoot.isKeyDown("a"))
        {
            setLocation(getX() - speed, getY());
        }

        if (Greenfoot.isKeyDown("d"))
        {
            setLocation(getX() + speed, getY());
        }
    }

    // Springen
    private void jump()
    {
        if (Greenfoot.isKeyDown("space") && onGround)
        {
            verticalSpeed = -currentJumpStrength;
            onGround = false;
        }
    }

    // Schwerkraft
    private void fall()
    {
        int oldY = getY();

        verticalSpeed += gravity;

        int newY = getY() + verticalSpeed;

        setLocation(getX(), newY);

        Actor ground = getOneIntersectingObject(Plattform.class);

        if (ground != null && verticalSpeed >= 0)
        {
            int groundTop = ground.getY() 
                          - ground.getImage().getHeight() / 2;

            int characterBottom = getY() 
                                + getImage().getHeight() / 2;

            // Nur landen, wenn der Spieler vorher über dem Boden war
            int oldCharacterBottom = oldY 
                                   + getImage().getHeight() / 2;

            if (oldCharacterBottom <= groundTop && 
                characterBottom >= groundTop)
            {
                setLocation(
                    getX(),
                    groundTop - getImage().getHeight() / 2
                );

                verticalSpeed = 0;
                onGround = true;
            }
        }
        else
        {
            onGround = false;
        }
    }

    public boolean collision(){
        if (getIntersectingObjects(Projectile.class).size()>0)
        {
            Greenfoot.setWorld(new GameOverWorld());
            return true;
        }
        else
        {
            return false;
        }
    }
    
    public void handlePowerUps(){
        if (jumpBoostDuration >= 0){
            jumpBoostDuration -= 1;
        } else if (jumpBoostDuration <= -1){
            currentJumpStrength = defaultJumpStrength;
        }
    }
    
    public void reveivePowerUp(int duration, String type){
        switch(type){
            case "dummy":
                break;
            case "JumpBoost":
                currentJumpStrength = defaultJumpStrength;
                currentJumpStrength += jumpBoostStrength;
                jumpBoostDuration = duration;
        }
    }
}