using System;
using System.Runtime.InteropServices;
using FFXIVClientStructs.FFXIV.Client.Graphics.Kernel;
using TerraFX.Interop.DirectX;

namespace Auspex.Rendering.Direct3D;

internal sealed class FrameRenderContext : IDisposable
{
	public unsafe ID3D11Device* Device { get; private set; }

	public unsafe ID3D11DeviceContext* Context { get; private set; }

	public unsafe FrameRenderContext()
	{
		Device = (ID3D11Device*)FFXIVClientStructs.FFXIV.Client.Graphics.Kernel.Device.Instance()->D3D11Forwarder;
		Device->AddRef();
		ID3D11DeviceContext* context = default(ID3D11DeviceContext*);
		Marshal.ThrowExceptionForHR(Device->CreateDeferredContext(0u, &context));
		Context = context;
	}

	public unsafe void Dispose()
	{
		if (Context != null)
		{
			Context->Release();
			Context = null;
		}
		if (Device != null)
		{
			Device->Release();
			Device = null;
		}
		GC.SuppressFinalize(this);
	}

	public unsafe void Execute()
	{
		ID3D11CommandList* ptr = default(ID3D11CommandList*);
		Marshal.ThrowExceptionForHR(Context->FinishCommandList(false, &ptr));
		ID3D11DeviceContext* ptr2 = default(ID3D11DeviceContext*);
		Device->GetImmediateContext(&ptr2);
		ptr2->ExecuteCommandList(ptr, true);
		ptr2->Release();
		ptr->Release();
		Context->ClearState();
	}
}