using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;

namespace Ichni.Editor
{
    public class PostProcessingManager : MonoBehaviour
    {
        public Volume globalVolume;
        public PostProcessingController nbController;
        public PixelateFeature pixelateFeature;
        
        void Awake()
        {
            FindAndCacheFeatureWithReflection();
            SetFeatureActive(false);
            SetPixelateStrength(Screen.width, Screen.height);
        }
        
        private void FindAndCacheFeatureWithReflection()
        {
            var pipelineAsset = GraphicsSettings.currentRenderPipeline as UniversalRenderPipelineAsset;
            if (pipelineAsset == null)
            {
                Debug.LogError("当前渲染管线不是 UniversalRenderPipelineAsset。");
                return;
            }

            // 2. 使用反射来获取内部的 m_RendererDataList 字段
            FieldInfo rendererDataListField = typeof(UniversalRenderPipelineAsset).GetField("m_RendererDataList", BindingFlags.NonPublic | BindingFlags.Instance);
            if (rendererDataListField == null)
            {
                Debug.LogError("在 UniversalRenderPipelineAsset 中无法通过反射找到 'm_RendererDataList' 字段。API可能已在你的URP版本中更改。");
                return;
            }

            var rendererDataList = rendererDataListField.GetValue(pipelineAsset) as ScriptableRendererData[];
            if (rendererDataList == null)
            {
                Debug.LogError("获取渲染器数据列表失败。");
                return;
            }

            // 3. 遍历获取到的列表来查找我们的Feature
            foreach (var rendererData in rendererDataList)
            {
                if (rendererData == null) continue;

                var feature = rendererData.rendererFeatures.OfType<PixelateFeature>().FirstOrDefault();
                if (feature != null)
                {
                    pixelateFeature = feature;
                    Debug.Log("成功找到并缓存 pixelateFeature (通过反射)!");
                    break;
                }
            }

            if (pixelateFeature == null)
            {
                Debug.LogError("在所有 RendererData 中都未找到 pixelateFeature。");
            }
        }
        
        public void SetFeatureActive(bool enable)
        {
            if (pixelateFeature != null)
            {
                pixelateFeature.SetActive(enable);
            }
        }
        
        public void SetPixelateStrength(float strengthX, float strengthY)
        {
            if (pixelateFeature != null)
            {
                pixelateFeature.settings.pixelateStrengthX = strengthX;
                pixelateFeature.settings.pixelateStrengthY = strengthY;
                pixelateFeature.pixelatePass.UpdateConfig(strengthX, strengthY);
            }
            else
            {
                Debug.LogError("Pixelate feature is not initialized.");
            }
        }
    }
}