using System;
using System.Collections.Generic;
using Cielonos.MainGame;
using Cielonos.MainGame.Effects;
using NBShader;
using SLSFramework.General;
using UnityEngine;
using UnityEngine.Rendering;

namespace Cielonos
{
    public partial class PostProcessingManager : Singleton<PostProcessingManager>
    {
        public PostProcessingController postProcessingController;
        
        public SpeedLinesSubmodule speedLinesSm;
        
        [Tooltip("主要的后处理 Volume")]
        [SerializeField]
        private Volume volume;
        
        private VolumeProfile profile;

        private Dictionary<Type, VolumeComponent> componentCache;

        protected override void Awake()
        {
            base.Awake();
            speedLinesSm = new SpeedLinesSubmodule(this);
            if (volume != null)
            {
                profile = volume.profile;
                componentCache = new Dictionary<Type, VolumeComponent>();
            }
            else
            {
                Debug.LogError("PostProcessingManager: 未分配 Volume 组件。请在 Inspector 中设置。");
            }
        }

        private void Update()
        {
            speedLinesSm.Update(MainGameManager.Player.selfTimeSm.TimeScale);
        }
        
        /// <summary>
        /// 从 Volume Profile 中安全地获取一个后处理组件（如 SpeedLines, RadialBlur）。
        /// </summary>
        /// <typeparam name="T">要获取的组件类型 (必须继承自 VolumeComponent)</typeparam>
        /// <param name="component">获取到的组件实例</param>
        /// <returns>如果成功找到，返回 true</returns>
        public bool GetVolumeComponent<T>(out T component) where T : VolumeComponent
        {
            Type type = typeof(T);

            // 1. 尝试从缓存中获取
            if (componentCache.TryGetValue(type, out var cachedComponent))
            {
                component = (T)cachedComponent;
                return component != null;
            }

            // 2. 如果缓存中没有，从 Profile 中获取
            if (profile.TryGet(out T foundComponent))
            {
                componentCache[type] = foundComponent; // 存入缓存
                component = foundComponent;
                return true;
            }

            // 3. 未找到
            Debug.LogWarning($"PostProcessManager: 在 Volume Profile 中未找到类型为 {type.Name} 的组件。");
            component = null;
            return false;
        }
    }
}