using System.Runtime.InteropServices;
using Engine.Renderer.Pixel;
using Engine.Renderer.Shader;
using OpenTK.Graphics.OpenGL;
using Serilog;
using Serilog.Events;

namespace Engine.Renderer;

public class Renderer
{
    internal Texture.Texture TextureInternal => _framebuffer.TextureInternal;

    private readonly Framebuffer.Framebuffer _framebuffer;
    private readonly Queue<Action<Renderer>> _renderActions = new();

    public Renderer(int width, int height)
    {
        InitializeOpenGl();

        _framebuffer = Framebuffer.Framebuffer.Create<Rgb8>(width, height);
    }

    private void InitializeOpenGl()
    {
#if DEBUG
        Debug.Setup();
#endif

        GL.Enable(EnableCap.DepthTest);

        GL.Enable(EnableCap.FramebufferSrgb);

        GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
        GL.Enable(EnableCap.Blend);
    }

    internal void Commit(Action<Renderer> renderAction)
    {
        _renderActions.Enqueue(renderAction);
    }

    internal void Render()
    {
        _framebuffer.Bind();
        while (_renderActions.TryDequeue(out var renderAction))
            renderAction(this);
        _framebuffer.Unbind();
    }

    internal void Resize(int width, int height)
    {
        _framebuffer.Resize(width, height);
    }
}