using System.Collections;
using System.Collections.Generic;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;

namespace Ichni.RhythmGame
{
    /// <summary>
    /// 包含效果的次级模块
    /// </summary>
    public partial class EffectSubmodule : SubmoduleBase
    {
        public Dictionary<string, List<EffectBase>> effectCollection;
        
        public EffectSubmodule(GameElement attachedGameElement, EffectSubmodulePreset preset = EffectSubmodulePreset.Default) 
            : base(attachedGameElement)
        {
            effectCollection = new Dictionary<string, List<EffectBase>>();

            if (preset == EffectSubmodulePreset.Default) //对于默认的效果次级模块，有Prior、Default、Late三个效果集合
            {
                effectCollection.Add("Prior", new List<EffectBase>());
                effectCollection.Add("Default", new List<EffectBase>());
                effectCollection.Add("Late", new List<EffectBase>());
            }
            else if (preset == EffectSubmodulePreset.Note) //对于Note的效果次级模块，在Note的不同状态下有独立的效果集合
            {
                effectCollection.Add("Generate", new List<EffectBase>());
                effectCollection.Add("GeneralJudge", new List<EffectBase>());
                effectCollection.Add("StartHold", new List<EffectBase>()); //仅用于Hold
                effectCollection.Add("Holding", new List<EffectBase>()); //仅用于Hold
                effectCollection.Add("Perfect", new List<EffectBase>());
                effectCollection.Add("Good", new List<EffectBase>());
                effectCollection.Add("Bad", new List<EffectBase>());
                effectCollection.Add("Miss", new List<EffectBase>());
                effectCollection.Add("AfterJudge", new List<EffectBase>());
            }

            if (!HaveSameSubmodule)
            {
                (attachedGameElement as IHaveEffectSubmodule).effectSubmodule = this;
            }
        }

        public EffectSubmodule(GameElement attachedGameElement, Dictionary<string, List<EffectBase_BM>> effectList_BM) : base(attachedGameElement)
        {
            effectCollection = new Dictionary<string, List<EffectBase>>();

            foreach (var effect in effectList_BM)
            {
                List<EffectBase> effectList = new List<EffectBase>();
                foreach (var effectBM in effect.Value)
                {
                    if (BeatmapContainer_BM.LowPriorityDataTypes.Contains(effectBM.GetType())) // 如果是低优先级数据类型
                    {
                        (GameManager.instance.beatmapContainer).lowPriorityActions.Add(() =>
                        {
                            effectList.Add(effectBM.ConvertToGameType(attachedGameElement));
                        });
                    }
                    else
                    {
                        effectList.Add(effectBM.ConvertToGameType(attachedGameElement));
                    }
                }

                effectCollection.Add(effect.Key, effectList);
            }

            if (!HaveSameSubmodule)
            {
                (attachedGameElement as IHaveEffectSubmodule).effectSubmodule = this;
            }
        }
    }

    public partial class EffectSubmodule
    {
        public override void SaveBM()
        {
            matchedBM = new EffectSubmodule_BM(attachedGameElement);
        }
    }

    public partial class EffectSubmodule
    {
        public enum EffectSubmodulePreset
        {
            Default,
            Note,
        }

        private static Dictionary<string, EffectBase> EffectCollection { get; } =
            new Dictionary<string, EffectBase>()
            {
                { "Bloom", new BloomEffect(1, 2, CustomCurvePresets.Parabolic(1, 0, 1)) },
                { "CameraShake", new CameraShakeEffect(1, 50, 1, 1, 1) },
                { "ChromaticAberration", new ChromaticAberrationEffect(1, 1, CustomCurvePresets.Parabolic(1, 0, 1)) },
                { "Vignette", new VignetteEffect(1, 1, 0.4f, Color.black, CustomCurvePresets.Parabolic(1, 0, 1)) },
                { "SetInteger", new SetIntegerEffect("New Variable", 0, false, 0, 1) },
                { "EnableControl", new EnableControlEffect(null, "New Variable", 0, false, "") },
                { "LowPassFilter", new LowPassFilterEffect(1, 10, CustomCurvePresets.Parabolic(1, 0, 1)) },
                { "HighPassFilter", new HighPassFilterEffect(1, 22000, CustomCurvePresets.Parabolic(1, 0, 1)) }
            };
    }

    public interface IHaveEffectSubmodule
    {
        public EffectSubmodule effectSubmodule { get; set; }
    }

    namespace Beatmap
    {
        public class EffectSubmodule_BM : Submodule_BM
        {
            public Dictionary<string, List<EffectBase_BM>> effectCollection;
            
            public EffectSubmodule_BM()
            {
                
            }

            public EffectSubmodule_BM(GameElement attachedElement) : base(attachedElement)
            {
                effectCollection = new Dictionary<string, List<EffectBase_BM>>();
                IHaveEffectSubmodule element = attachedElement as IHaveEffectSubmodule;
                
                foreach (var effect in element.effectSubmodule.effectCollection)
                {
                    List<EffectBase_BM> effectList = new List<EffectBase_BM>();
                    foreach (var effectBase in effect.Value)
                    {
                        effectList.Add(effectBase.ConvertToBM());
                    }
                    effectCollection.Add(effect.Key, effectList);
                }
            }

            public override void ExecuteBM()
            {
                attachedElement = GameElement_BM.GetElement(attachedElementGuid);
                (attachedElement as IHaveEffectSubmodule).effectSubmodule = new EffectSubmodule(attachedElement, effectCollection);
            }
            
            public override void DuplicateBM(GameElement attached)
            {
                (attached as IHaveEffectSubmodule).effectSubmodule = new EffectSubmodule(attached, effectCollection);
            }
        }
    }

    public abstract class EffectBase : IBaseElement
    {
        public enum EffectState
        {
            Before = -1,
            Middle = 0,
            After = 1,
            Error = 100
        }

        public BaseElement_BM matchedBM { get; set; }

        public GameElement attachedGameElement;
        
        /// <summary>
        /// 效果的持续时间，如果为0则表示瞬间效果
        /// </summary>
        public float effectTime;

        /// <summary>
        /// 是否是瞬间效果
        /// </summary>
        public bool isInstantEffect => effectTime <= 0;

        /// <summary>
        /// 效果的进度百分比
        /// </summary>
        public float effectProgressPercent;

        /// <summary>
        /// 效果当前的状态
        /// </summary>
        public EffectState nowEffectState;

        protected EffectBase()
        {
            this.effectTime = 0;
            this.nowEffectState = EffectState.Before;
            this.effectProgressPercent = 0;
        }

        protected EffectBase(float effectTime)
        {
            this.effectTime = effectTime;
            this.nowEffectState = EffectState.Before;
            this.effectProgressPercent = 0;
        }

        public void SaveBM()
        {
            throw new System.NotImplementedException();
        }

        public virtual void UpdateEffect(float triggerTime)
        {
            EffectState state = CheckEffectState(triggerTime);
            float songTime = GameManager.instance.songTime;

            if (state == EffectState.Before && nowEffectState != EffectState.Before)
            {
                nowEffectState = EffectState.Before;
                effectProgressPercent = 0;
                Recover();
            }
            else if (state == EffectState.Middle)
            {
                if (nowEffectState == EffectState.Before)
                {
                    PreExecute();
                }

                nowEffectState = EffectState.Middle;
                effectProgressPercent = (songTime - triggerTime) / effectTime;
                Execute();
            }
            else if (state == EffectState.After && nowEffectState != EffectState.After)
            {
                nowEffectState = EffectState.After;
                effectProgressPercent = 1;
                Adjust();
            }
        }

        protected virtual EffectState CheckEffectState(float triggerTime)
        {
            float songTime = GameManager.instance.songTime;

            if (songTime < triggerTime)
            {
                return EffectState.Before;
            }

            if (songTime >= triggerTime &&
                songTime <= triggerTime + effectTime)
            {
                return EffectState.Middle;
            }

            if (songTime > triggerTime + effectTime)
            {
                return EffectState.After;
            }

            return EffectState.Error;
        }

        /// <summary>
        /// 当从Before状态进入Middle状态时，仅在效果的开始时触发一次方法
        /// </summary>
        public virtual void PreExecute()
        {

        }

        /// <summary>
        /// 在效果的持续时间内，触发这个方法
        /// </summary>
        public virtual void Execute()
        {

        }

        /// <summary>
        /// 如果是非瞬间效果，在效果完成后，触发这个方法；
        /// 如果是瞬间效果，则此方法即为Execute。原有的Execute方法不被调用。
        /// </summary>
        public virtual void Adjust()
        {

        }

        /// <summary>
        /// 如果时间轴回退到效果的触发时间之前，则触发这个方法
        /// </summary>
        public virtual void Recover()
        {

        }

        /// <summary>
        /// 如果效果被打断，则触发这个方法
        /// </summary>
        public virtual void Disrupt()
        {
            
        }

        /// <summary>
        /// 转换为存档类
        /// </summary>
        /// <returns></returns>
        public abstract EffectBase_BM ConvertToBM();

        public void Refresh()
        {
            
        }
    }

    namespace Beatmap
    {
        public abstract class EffectBase_BM
        {
            public float effectTime;
            
            public EffectBase_BM()
            {
                
            }
            
            public EffectBase_BM(float effectTime)
            {
                this.effectTime = effectTime;
            }
 
            /// <summary>
            /// 转换为游戏类
            /// </summary>
            /// <returns></returns>
            public abstract EffectBase ConvertToGameType(GameElement attachedGameElement);
        }
    }
}