using System.Reflection;
using Cysharp.Threading.Tasks;
using HarmonyLib;
using UnityEngine;

namespace ADOFAIRenderer.Core;

[DefaultExecutionOrder(int.MaxValue)]
internal class PostRenderHook : MonoBehaviour
{
    private FieldInfo? _camQuadMeshField;
    private MeshRenderer? _camQuadMeshRenderer;

    private void Awake()
    {
        _camQuadMeshField = AccessTools.Field(typeof(scrCamera), "camQuadMesh");
    }
        
    private void LateUpdate()
    {
        if (RenderManager.Instance)
            RenderManager.Instance.OnLastUpdate();
            
        PostFrameAsync().Forget();
    }

    private async UniTaskVoid PostFrameAsync()
    {
        await UniTask.WaitForEndOfFrame(this, destroyCancellationToken);
            
        if (!_camQuadMeshRenderer && scrCamera.instance)
            _camQuadMeshRenderer = _camQuadMeshField?.GetValue(scrCamera.instance) as MeshRenderer;

        if (RenderManager.Instance && _camQuadMeshRenderer)
            RenderManager.Instance.OnPostFrame(_camQuadMeshRenderer.sharedMaterial.mainTexture as RenderTexture);
    }
}