public class Player extends Actor
{
    private int Timer;
    private int Jump_Height = 12;
    private int Walk_Speed = 3;
    private double Fall_Speed = 0.4;
    
    private boolean In_The_Air = false;
    private double Delta_X = 0;
    private double Delta_Y = 0;
    private int Ground_Height = getImage().getHeight()/2;
    private int Side_Width = getImage().getWidth()/2;
    private World myWorld;
    int World_Height;
    int World_Width;
    
    public void Added_To_World(World myWorld)
    {
        this.myWorld = myWorld;
        this.World_Height = myWorld.getHeight();
        this.World_Width = myWorld.getWidth();
    }
    
    public void act()
    {
        if (In_The_Air)
        {
            Fall();
        }
        else
        {
            Get_Command();
        }
        
        Move();
        int Pos_Y = getY()+10;
        
        if (Timer > 0)
        {
            Timer--;
        }
        
        if (Timer == 0 && Greenfoot.isKeyDown("space"))
        {
            Bullet bullet = new Bullet();
            getWorld().addObject(bullet, 250, Pos_Y);
            Timer = 30;
        }
    }
    
    private void Run (String Direction)
    {
        if (Direction =="left")
        {
            Delta_X = Walk_Speed*-1;
        }
        else
        {
            Delta_X = Walk_Speed*-1;
        }
    }
    
    private void Stop()
    {
        Delta_X = 0;
    }
    
    private void Jump()
    {
        Delta_Y += Jump_Height;
        In_The_Air = true;
    }
    
    private void Fall()
    {
        Delta_Y-=Fall_Speed;
    }
    
    private void Move()
    {
        double New_X = getX() + Delta_X;
        double New_Y = getY() - Delta_Y;
        
        Actor Platform_Below = getOneObjectAtOffset(0, Ground_Height, Platform.class);
        if (Platform_Below != null)
        {
            if (Delta_Y < 0)
            {
                Delta_Y = 0;
                In_The_Air = false;
                GreenfootImage platformImage = Platform_Below.getImage();
                int Top_Of_Platform = Platform_Below.getY() - platformImage.getHeight()/2;
                New_Y = - Ground_Height;
            }
        }
        else if (getY() >= World_Height - Ground_Height)
        {
            if (Delta_Y < 0)
            {
                Delta_Y = 0;
                In_The_Air = false;
                New_Y = - Ground_Height;
            }
        }
        else
        {
            In_The_Air = true;
        }
        
        setLocation((int)New_X, (int)New_Y);
    }
    
    private void Get_Command()
    {
        if (Greenfoot.isKeyDown("up"))
        {
            Jump();
        }
    }
    
    public void act_Two()
    {
        if (isTouching(EnemyOne.class))
        {
            removeTouching(EnemyOne.class);
            getWorld().addObject(new EnemyOne(), 1000, 2);
            Level_1.HP.Add(-1);
            if (Level_1.HP.Get_Value() == 0)
            {
                Greenfoot.setWorld(new RetryWorld());
            }
        }
    }
}