using System;
using System.Collections;
using System.Collections.Generic;
using Ichni.RhythmGame.Beatmap;
using Sirenix.OdinInspector;
using UniRx;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public partial class TimeEffectsCollection : GameElement, IHaveTransformSubmodule, IHaveEffectSubmodule, IScheduledElement
    {
        #region [暴露属性字段] Essential Configs
        public float time; //触发效果的时间
        #endregion

        #region [运行时缓存] Cached Effect Lists
        private List<EffectBase> _priorEffects;
        private List<EffectBase> _defaultEffects;
        private List<EffectBase> _lateEffects;
        #endregion

        #region [子模块接口] Submodules
        public TransformSubmodule transformSubmodule { get; set; }
        public EffectSubmodule effectSubmodule { get; set; }
        #endregion

        #region [生命周期] Lifecycle & Factory
        public static TimeEffectsCollection GenerateElement(string name, Guid guid, List<string> tags, 
            bool isFirstGenerated, GameElement parentElement, float time)
        {
            TimeEffectsCollection timeEffectsCollection = Instantiate(GameManager.Instance.basePrefabs.emptyObject).AddComponent<TimeEffectsCollection>();
            timeEffectsCollection.Initialize(name, guid, tags, isFirstGenerated, parentElement);
            timeEffectsCollection.time = time;
            return timeEffectsCollection;
        }

        public override void SetDefaultSubmodules()
        {
            transformSubmodule = new TransformSubmodule(this);
            effectSubmodule = new EffectSubmodule(this);
        }

        public override void AfterInitialize()
        {
            base.AfterInitialize();
            CacheEffectLists();
            CoreServices.UpdateScheduler.Register(UpdatePhase.Effect, this);
        }

        public override void OnDelete()
        {
            base.OnDelete();
            CoreServices.UpdateScheduler.Unregister(UpdatePhase.Effect, this);
        }

        /// <summary>
        /// 缓存 effectCollection 中的 Prior/Default/Late 列表引用，
        /// 避免 ScheduledUpdate 中每帧执行 Dictionary string key 查找。
        /// </summary>
        private void CacheEffectLists()
        {
            if (effectSubmodule?.effectCollection == null) return;
            effectSubmodule.effectCollection.TryGetValue("Prior", out _priorEffects);
            effectSubmodule.effectCollection.TryGetValue("Default", out _defaultEffects);
            effectSubmodule.effectCollection.TryGetValue("Late", out _lateEffects);
        }
        #endregion

        #region [轮询更新] Main Update
        #region [IScheduledElement] Scheduler Interface
        public void ScheduledUpdate(UpdatePhase phase, float songTime)
        {
            if (effectSubmodule == null) return;

            UpdateEffectList(_priorEffects, time);
            UpdateEffectList(_defaultEffects, time);
            UpdateEffectList(_lateEffects, time);
        }

        private static void UpdateEffectList(List<EffectBase> effects, float effectTime)
        {
            if (effects == null) return;
            for (int i = 0; i < effects.Count; i++)
            {
                effects[i].UpdateEffect(effectTime);
            }
        }

        public bool IsScheduledActive => isActiveAndEnabled;
        #endregion
        #endregion
    }

}