using System;
using System.Collections;
using Convention;
using Demo.Editor.UI;
using UnityEngine;
using UnityEngine.Events;

namespace Demo.Game
{
    public interface IHookInteraction
    {

    }

    public abstract class IInteraction : TimelineScriptObject
    {
        protected override void SetupTimelineItem(TimelineItem item)
        {
            item.SetupDuration(new(VisibleDuration.x, VisibleDuration.y), GetTimelineItemColor());
        }

        [Serializable]
        public enum DurationStats
        {
            BeforeBegin = 0,
            BeforeEnd,
            After,
            Judgement
        }

        public const float IdentifiableJudgementTerminal = 0.16f;

        [Header(nameof(VisibleDuration))]
        [Content, SerializeField] private Vector2 VisibleDuration;
        public static float DefaultVisibleLength = IdentifiableJudgementTerminal * 15;
        [Content, SerializeField] public UnityEvent VisibleDurationBeforeEvent = new(),
            VisibleDurationBeginEvent = new(), VisibleDurationEndEvent = new();
        [Content, SerializeField] private DurationStats VisibleDurationStats = default;

        [Header(nameof(InteractiveDuration))]
        [Content, SerializeField] private Vector2 InteractiveDuration;
        public static float DefaultInteractiveLength = IdentifiableJudgementTerminal * 9;
        [Content, SerializeField] public UnityEvent InteractiveDurationBeforeEvent = new(), 
            InteractiveDurationBeginEvent = new(), InteractiveDurationEndEvent = new();
        [Content, SerializeField] private DurationStats InteractiveDurationStats = default;

        [Header(nameof(InteractableScoreInterval))]
        [Content, SerializeField] private Vector2 InteractableScoreInterval;
        public static float DefaultInteractableScoreIntervalLength = IdentifiableJudgementTerminal * 6;
        [Content, SerializeField] public UnityEvent InteractableScoreIntervalBeforeEvent = new(), 
            InteractableScoreIntervalBeginEvent = new(), InteractableScoreIntervalEndEvent = new();
        [Content, SerializeField] private DurationStats InteractableScoreIntervalStats = default;

        [Header(nameof(InteractableIntervalThatCanScoreBest))]
        [Content, SerializeField] private Vector2 InteractableIntervalThatCanScoreBest;
        public static float DefaultInteractableIntervalLengthThatCanScoreBest = IdentifiableJudgementTerminal * 3;
        [Content, SerializeField] public UnityEvent InteractableIntervalThatCanScoreBestBeforeEvent = new(), 
            InteractableIntervalThatCanScoreBestBeginEvent = new(), InteractableIntervalThatCanScoreBestEndEvent = new();
        [Content, SerializeField] private DurationStats InteractableIntervalThatCanScoreBestStats = default;

        [Header("Judgement")]
        [Content, SerializeField] private float BestJudgementTimePoint = -1;
        [Content, SerializeField] public UnityEvent<JudgementLevel> JudgementEvent = new();

        public float GetBestJudgementTimePoint()
        {
            return BestJudgementTimePoint;
        }

        public bool IsInInteractiveDuration()
        {
            return InteractiveDurationStats == DurationStats.BeforeEnd;
        }
        public bool IsInInteractiveDuration(float time)
        {
            return time > InteractiveDuration.x && time < InteractiveDuration.y;
        }

        public const int JudgementLevelCount = 3;

        public override IEnumerator LoadScript(string script)
        {
            yield return base.LoadScript(script);
            if (BestJudgementTimePoint <= 0)
            {
                DoSetupJudgement(0);
            }
        }

        public override IEnumerator UnloadScript()
        {
            yield return base.UnloadScript();
            VisibleDurationBeginEvent = new();
            VisibleDurationEndEvent = new();
            InteractiveDurationBeginEvent = new();
            InteractiveDurationEndEvent = new();
            InteractableScoreIntervalBeginEvent = new();
            InteractableScoreIntervalEndEvent = new();
            InteractableIntervalThatCanScoreBestBeginEvent = new();
            InteractableIntervalThatCanScoreBestEndEvent = new();
            BestJudgementTimePoint = -1;
        }

        public void InvokeJudgement(JudgementLevel level)
        {
            if (level == JudgementLevel.None)
                return;
            JudgementEvent.Invoke(level);
            VisibleDurationStats = DurationStats.Judgement;
            VisibleDurationEndEvent.Invoke();
            InteractiveDurationStats = DurationStats.Judgement;
            InteractableScoreIntervalStats = DurationStats.Judgement;
            InteractableIntervalThatCanScoreBestStats = DurationStats.Judgement;
            InteractiveDurationEndEvent.Invoke();
            InteractableScoreIntervalEndEvent.Invoke();
            InteractableIntervalThatCanScoreBestEndEvent.Invoke();
        }

        private static DurationStats UpdateDurationStats(float begin, UnityEvent beforeEvent, UnityEvent beginEvent, float end, UnityEvent endEvent,
            float current, DurationStats currentStats)
        {
            if (currentStats == DurationStats.After)
                return DurationStats.After;
            else if (current < begin)
            {
                if (currentStats != DurationStats.BeforeBegin)
                    beforeEvent.Invoke();
                return DurationStats.BeforeBegin;
            }
            else if (current < end)
            {
                if (currentStats == DurationStats.BeforeBegin)
                    beginEvent.Invoke();
                return DurationStats.BeforeEnd;
            }
            else if (currentStats == DurationStats.BeforeEnd)
            {
                endEvent.Invoke();
            }
            return DurationStats.After;
        }

        public enum JudgementLevel
        {
            None = -2,//No Judge
            Default = -1,
            BestLevel = 0,//Level0
            ScoreLevel = 1,//Level1
            Bad = 128,
        }

        public abstract JudgementLevel JudgementBehaviour(float timePoint);

        private void DoUpdateJudgementStats(float currentTime)
        {
            // 可见区间
            VisibleDurationStats = UpdateDurationStats(VisibleDuration.x, VisibleDurationBeforeEvent,
                VisibleDurationBeginEvent, VisibleDuration.y, VisibleDurationEndEvent,
                currentTime, VisibleDurationStats);
            if (VisibleDurationStats != DurationStats.BeforeEnd)
                return;
            // 可判定区间
            InteractiveDurationStats = UpdateDurationStats(InteractiveDuration.x, InteractiveDurationBeforeEvent,
                InteractiveDurationBeginEvent, InteractiveDuration.y, InteractiveDurationEndEvent,
                currentTime, InteractiveDurationStats);
            if (InteractiveDurationStats != DurationStats.BeforeEnd)
                return;
            // 1级判定区间
            InteractableScoreIntervalStats = UpdateDurationStats(InteractableScoreInterval.x, InteractableScoreIntervalBeforeEvent,
                InteractableScoreIntervalBeginEvent, InteractableScoreInterval.y, InteractableScoreIntervalEndEvent,
                currentTime, InteractableScoreIntervalStats);
            if (InteractableScoreIntervalStats != DurationStats.BeforeEnd)
                return;
            // 0级判定区间
            InteractableIntervalThatCanScoreBestStats = UpdateDurationStats(InteractableIntervalThatCanScoreBest.x, InteractableIntervalThatCanScoreBestBeforeEvent,
                InteractableIntervalThatCanScoreBestBeginEvent, InteractableIntervalThatCanScoreBest.y, InteractableIntervalThatCanScoreBestEndEvent,
                currentTime, InteractableIntervalThatCanScoreBestStats);
        }

        public override void ResetEnterGameStatus()
        {
            base.ResetEnterGameStatus();
            DoUpdateJudgementStats(Mathf.NegativeInfinity);
        }

        protected override void UpdateTicks(float currentTime, float deltaTime, TickType tickType)
        {
            base.UpdateTicks(currentTime, deltaTime, tickType);
            // 预判断
            if (VisibleDurationStats == DurationStats.Judgement)
                return;
            // 检定
            InvokeJudgement(JudgementBehaviour(currentTime));
            // 更新状态
            DoUpdateJudgementStats(currentTime);
        }

        public void DoSetupJudgementLevels(
            float bestJudgementTimePoint,
            float interactableIntervalThatCanScoreBest,
            float interactableScoreInterval,
            float interactiveDuration,
            float visibleDuration)
        {
            this.BestJudgementTimePoint = bestJudgementTimePoint;
            var bestJudgementTimePointValue = bestJudgementTimePoint;
            // InteractableIntervalThatCanScoreBest
            var interactableIntervalThatCanScoreBestValue = interactableIntervalThatCanScoreBest * 0.5f;
            InteractableIntervalThatCanScoreBest = new(bestJudgementTimePointValue - interactableIntervalThatCanScoreBestValue,
                bestJudgementTimePointValue + interactableIntervalThatCanScoreBestValue);

            // InteractableScoreInterval
            var interactableScoreIntervalValue = interactableScoreInterval * 0.5f;
            InteractableScoreInterval = new(bestJudgementTimePointValue - interactableScoreIntervalValue,
                bestJudgementTimePointValue + interactableScoreIntervalValue);

            // InteractiveDuration
            var interactiveDurationValue = interactiveDuration * 0.5f;
            InteractiveDuration = new(bestJudgementTimePointValue - interactiveDurationValue,
                bestJudgementTimePointValue + interactiveDurationValue);

            // InteractableScoreInterval
            var visibleDurationValue = visibleDuration * 0.5f;
            VisibleDuration = new(bestJudgementTimePointValue - visibleDurationValue,
                bestJudgementTimePointValue + visibleDurationValue);
        }

        public void DoSetupJudgement(float bestJudgementTimePoint)
        {
            DoSetupJudgementLevels(
                bestJudgementTimePoint,
                DefaultInteractableIntervalLengthThatCanScoreBest,
                DefaultInteractableScoreIntervalLength,
                DefaultInteractiveLength,
                DefaultVisibleLength);
        }

        /// <summary>
        /// 使用配置中的区间长度设置以最佳判定点为中心的各级区间
        /// </summary>
        /// <param name="bestJudgementTimePoint">最佳判定点</param>
        [ScriptableCall(@"
<summary>
使用配置中的区间长度设置以最佳判定点为中心的各级区间
</summary>
<param name=""bestJudgementTimePoint"">最佳判定点</param>
")]
        public void SetupJudgement(string bestJudgementTimePoint)
        {
            DoSetupJudgement(Parse(bestJudgementTimePoint));
        }

        /// <summary>
        /// 通过传递对称区间进行初始化
        /// </summary>
        /// <param name="bestJudgementTimePoint">最佳判定点</param>
        /// <param name="interactableIntervalThatCanScoreBest">区间时长，最终结果为
        /// (bestJudgementTimePoint-interactableIntervalThatCanScoreBest/2,bestJudgementTimePoint+interactableIntervalThatCanScoreBest/2)</param>
        /// <param name="interactableScoreInterval">区间时长，最终结果为
        /// (bestJudgementTimePoint-interactableScoreInterval/2,bestJudgementTimePoint+interactableScoreInterval/2)</param>
        /// <param name="interactiveDuration">区间时长，最终结果为
        /// (bestJudgementTimePoint-interactiveDuration/2,bestJudgementTimePoint+interactiveDuration/2)</param>
        /// <param name="visibleDuration">区间时长，最终结果为
        /// (bestJudgementTimePoint-visibleDuration/2,bestJudgementTimePoint+visibleDuration/2)</param>
        [ScriptableCall(@"
<summary>
通过传递对称区间进行初始化
</summary>
<param name=""bestJudgementTimePoint"">最佳判定点</param>
<param name=""interactableIntervalThatCanScoreBest"">区间时长，最终结果为
(bestJudgementTimePoint-interactableIntervalThatCanScoreBest/2,bestJudgementTimePoint+interactableIntervalThatCanScoreBest/2)</param>
<param name=""interactableScoreInterval"">区间时长，最终结果为
(bestJudgementTimePoint-interactableScoreInterval/2,bestJudgementTimePoint+interactableScoreInterval/2)</param>
<param name=""interactiveDuration"">区间时长，最终结果为
(bestJudgementTimePoint-interactiveDuration/2,bestJudgementTimePoint+interactiveDuration/2)</param>
<param name=""visibleDuration"">区间时长，最终结果为
(bestJudgementTimePoint-visibleDuration/2,bestJudgementTimePoint+visibleDuration/2)</param>
")]
        public void SetupJudgementLevels(
            string bestJudgementTimePoint,
            string interactableIntervalThatCanScoreBest,
            string interactableScoreInterval,
            string interactiveDuration,
            string visibleDuration)
        {
            DoSetupJudgementLevels(
                Parse(bestJudgementTimePoint),
                Parse(interactableIntervalThatCanScoreBest),
                Parse(interactableScoreInterval),
                Parse(interactiveDuration),
                Parse(visibleDuration));
        }

        /// <summary>
        /// 设置可见区间（显现但不可判定，3级判定区间）开始时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置可见区间（显现但不可判定，3级判定区间）开始时间
</summary>
<param name=""value""></param>
")]
        public void SetVisibleDurationBegin(string value)
        {
            VisibleDuration.x = Parse(value);
        }
        /// <summary>
        /// 设置可见区间（显现但不可判定，3级判定区间）结束时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置可见区间（显现但不可判定，3级判定区间）结束时间
</summary>
<param name=""value""></param>
")]
        public void SetVisibleDurationEnd(string value)
        {
            VisibleDuration.y = Parse(value);
        }

        /// <summary>
        /// 设置2级判定区间（可判定但错误的）开始时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置2级判定区间（可判定但错误的）开始时间
</summary>
<param name=""value""></param>
")]
        public void SetInteractiveDurationBegin(string value)
        {
            InteractiveDuration.x = Parse(value);
        }
        /// <summary>
        /// 设置2级判定区间（可判定但错误的）结束时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置2级判定区间（可判定但错误的）结束时间
</summary>
<param name=""value""></param>
")]
        public void SetInteractiveDurationEnd(string value)
        {
            InteractiveDuration.y = Parse(value);
        }

        /// <summary>
        /// 设置1级判定区间（可判定的）开始时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置1级判定区间（可判定的）开始时间
</summary>
<param name=""value""></param>
")]
        public void SetInteractableScoreIntervalBegin(string value)
        {
            InteractableScoreInterval.x = Parse(value);
        }
        /// <summary>
        /// 设置1级判定区间（可判定的）结束时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置1级判定区间（可判定的）结束时间
</summary>
<param name=""value""></param>
")]
        public void SetInteractableScoreIntervalEnd(string value)
        {
            InteractableScoreInterval.y = Parse(value);
        }

        /// <summary>
        /// 设置0级判定区间（最佳判定）开始时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置0级判定区间（最佳判定）开始时间
</summary>
<param name=""value""></param>
")]
        public void SetInteractableIntervalThatCanScoreBestBegin(string value)
        {
            InteractableIntervalThatCanScoreBest.x = Parse(value);
            if (BestJudgementTimePoint < 0)
            {
                BestJudgementTimePoint = Mathf.Lerp(InteractableIntervalThatCanScoreBest.x, InteractableIntervalThatCanScoreBest.y, 0.5f);
            }
        }
        /// <summary>
        /// 设置0级判定区间（最佳判定）结束时间
        /// </summary>
        /// <param name="value"></param>
        [ScriptableCall(@"
<summary>
设置0级判定区间（最佳判定）结束时间
</summary>
<param name=""value""></param>
")]
        public void SetInteractableIntervalThatCanScoreBestEnd(string value)
        {
            InteractableIntervalThatCanScoreBest.y = Parse(value);
            if (BestJudgementTimePoint < 0)
            {
                BestJudgementTimePoint = Mathf.Lerp(InteractableIntervalThatCanScoreBest.x, InteractableIntervalThatCanScoreBest.y, 0.5f);
            }
        }
    }
}