using System;

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

using Syntriax.Engine.Core.Abstract;

using ISprite = Syntriax.Engine.Core.Abstract.ISprite;

namespace Syntriax.Engine.Core.Behaviours;

public class DrawableSpriteBehaviour : Behaviour, IDrawBehaviour, IAssignableSprite
{
    public Action<IAssignableSprite>? OnSpriteAssigned { get; set; } = null;

    private ISprite _sprite = null!;

    public ISprite Sprite => _sprite;

    public void Draw(SpriteBatch spriteBatch)
    {
        if (!BehaviourController.GameObject.StateEnable.Enabled || !StateEnable.Enabled)
            return;

        Vector2 position = BehaviourController.GameObject.Transform.Position;
        Vector2 scale = BehaviourController.GameObject.Transform.Scale;

        Rectangle rectangle = new Rectangle((int)position.X, (int)position.Y, (int)(Sprite.Texture2D.Width * scale.X), (int)(Sprite.Texture2D.Height * scale.Y));

        spriteBatch.Draw(Sprite.Texture2D, rectangle, Sprite.Color);
    }

    public bool Assign(ISprite sprite)
    {
        _sprite = sprite;
        OnSpriteAssigned?.Invoke(this);
        return true;
    }

    public DrawableSpriteBehaviour() => OnUnassigned += OnUnassign;
    private void OnUnassign(IAssignable assignable) => _sprite = null!;
}