using Ichni.RhythmGame.Beatmap;
using UnityEngine;
using UnityEngine.Rendering.Universal; // 需要引入 URP 库

namespace Ichni.RhythmGame
{
    public class ChromaticAberrationEffect : EffectBase
    {
        #region [效果参数] Effect Parameters
        public float peak;
        public AnimationCurve intensityCurve;

        // 缓存后处理组件，避免运行时每帧由于反序列化而产生 GC
        private ChromaticAberration _chromaticAberration;
        #endregion

        #region [初始化] Initialization
        public ChromaticAberrationEffect(float effectTime, float peak, AnimationCurve intensityCurve) 
            : base(effectTime) // 【修改1】调用基类含时构造，将 effectTime 赋为 duration，激活时长逻辑
        {
            this.effectTime = effectTime;
            this.peak = peak;
            this.intensityCurve = intensityCurve;
        }

        /// <summary>
        /// 私有方法：安全获取 URP 色差后处理句柄
        /// </summary>
        private void PrepareEffectHandle()
        {
            if (_chromaticAberration == null && PostProcessingManager.GlobalVolume != null)
            {
                // .profile 会自动实例化一个副本，防止修改了Editor原有的资产
                PostProcessingManager.GlobalVolume.profile.TryGet(out _chromaticAberration);
            }
        }
        #endregion

        #region [效果逻辑覆盖] Effect Pattern Overrides
        public override void PreExecute()
        {
            PrepareEffectHandle();
        }

        public override void Execute()
        {
            if (_chromaticAberration != null)
            {
                // 【修改2】直接借助基类已算出的 effectProgressPercent 来拉取曲线
                // 不再需要外部插件，每一帧的强度与音乐进程强绑定！哪怕音乐倒退也会原路倒退。
                float currentIntensity = intensityCurve.Evaluate(effectProgressPercent) * peak;
                _chromaticAberration.intensity.value = currentIntensity;
            }
        }

        public override void Adjust() { ResetEffect(); }
        public override void Recover() { ResetEffect(); }
        public override void Disrupt() { ResetEffect(); }
        
        private void ResetEffect()
        {
            if (_chromaticAberration != null) _chromaticAberration.intensity.value = 0f;
        }
        #endregion

    }

}