using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Blacklight.Core;
using Blacklight.Core.Drawables;
using Azimuth;
using System.Reflection;
using System.Security.AccessControl;

namespace Glass.Blacklight
{
    /// <summary>
    /// Responsible for loading graphics resources needed for materials in the registry (bound to a specific device)
    /// and knowing how to use them to actually render to a Cel.
    /// </summary>
    public class BlacklightRenderer : Renderer<Cel>
    {
        public void BindToWindow(WindowHandle window)
        {
            RegisterAllSpriteSheets(window);
        }

        public void RegisterAllSpriteSheets(WindowHandle window)
        {
            foreach (var type in AppDomain.CurrentDomain.GetAssemblies()
                .Where(assembly => !RenderCallbackRegistry<Cel>.IsSystemAssembly(assembly))
                .SelectMany(assembly => assembly.DefinedTypes))
            {
                SpriteSheetAttribute spriteSheetAttribute = type.GetCustomAttribute<SpriteSheetAttribute>();
                if (spriteSheetAttribute == null)
                {
                    continue;
                }

                spriteRenderers[spriteSheetAttribute] = SpriteSheetRenderer.SpriteSheetBuilder(
                    type, window, spriteSheetAttribute);
            }
        }

        public override void Render(Cel context, SpriteMaterial material, Rect rect, AffineMatrix transform)
        {
            var spriteRenderer = spriteRenderers[material.SpriteSheet];
            spriteRenderer.Render(context, material, rect, transform);
        }

        private Dictionary<SpriteSheetAttribute, SpriteSheetRenderer> spriteRenderers =
            new Dictionary<SpriteSheetAttribute, SpriteSheetRenderer>();
    }
}