using osu.Framework;
using osu.Framework.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Input.Events;
using osu.Framework.Platform;
using osuTK;
using osuTK.Graphics;

namespace HillLike;

public class HillLikeGame : Game
{
    private World _world = null!;

    [BackgroundDependencyLoader]
    private void Load(GameHost host)
    {
        Add(new Container
        {
            RelativeSizeAxes = Axes.Both,
            Children =
            [
                _world = new World(),
                new Hud(_world)
            ]
        });
    }

    protected override void Update()
    {
        base.Update();
        _world.Step((float)(Clock.ElapsedFrameTime / 1000.0));
    }

    protected override bool OnKeyDown(KeyDownEvent e)
    {
        _world.HandleKeyDown(e);
        return base.OnKeyDown(e);
    }

    protected override void OnKeyUp(KeyUpEvent e)
    {
        _world.HandleKeyUp(e);
        base.OnKeyUp(e);
    }
}

public class Hud : CompositeDrawable
{
    private readonly Box _speedBar;
    private readonly Box _speedBarBg;
    private readonly World _world;

    public Hud(World world)
    {
        this._world = world;

        RelativeSizeAxes = Axes.Both;

        InternalChildren =
        [
            _speedBarBg = new Box
            {
                Anchor = Anchor.TopLeft,
                Origin = Anchor.TopLeft,
                Position = new Vector2(20, 42),
                Size = new Vector2(260, 10),
                Colour = new Color4(30, 30, 30, 220)
            },
            _speedBar = new Box
            {
                Anchor = Anchor.TopLeft,
                Origin = Anchor.TopLeft,
                Position = new Vector2(20, 42),
                Size = new Vector2(0, 10),
                Colour = new Color4(120, 180, 255, 255)
            }
        ];
    }

    protected override void Update()
    {
        base.Update();

        var speed = _world.Car.Velocity.X;
        _speedBar.Width = 260 * Math.Clamp(Math.Abs(speed) / 25f, 0, 1);
    }
}