using System;
using System.Collections.Generic;
using System.Linq;
using Sirenix.OdinInspector;
using UnityEngine;

namespace SLSUtilities.Feedback
{
    public enum FeedbackPlaybackStrategy
    {
        OwnerBound = 0,
        Detached = 1
    }

    /// <summary>
    /// 单个反馈序列的模板资产。运行时播放前会复制为 RuntimeFeedback，避免动态参数污染模板。
    /// </summary>
    [CreateAssetMenu(fileName = "NewFeedbackData", menuName = "SLSUtilities/Feedback/FeedbackData")]
    public partial class FeedbackData : SerializedScriptableObject
    {
        [ReadOnly, ShowInInspector]
        public FeedbackDataCollection parentCollection;

        [Title("Editor Settings")]
        public string feedbackName;

        [Title("Playback")]
        [LabelText("Playback Strategy")]
        [Tooltip("OwnerBound: driven by the source subcontroller and stopped when the source dies/disables. Detached: driven globally without owner/time-provider binding.")]
        public FeedbackPlaybackStrategy playbackStrategy = FeedbackPlaybackStrategy.OwnerBound;

        [Title("Play Limits")]
        [LabelText("限制播放频次")]
        [Tooltip("如果勾选，将限制此 Feedback 的播放频次。默认每帧最多播放1次")]
        public bool limitPlay = true;

        [ShowIf("limitPlay")]
        [LabelText("最低播放间隔 (秒)")]
        [Tooltip("两次播放之间的最低时间间隔，以 unscaledTime 计算。为 0 代表每帧最多播放 1 次。")]
        public float minPlayInterval = 0f;

        public FeedbackTimeSettings defaultTimeSettings = new FeedbackTimeSettings();

        [Title("Feedback Tracks")]
        [ListDrawerSettings(ShowFoldout = true, ListElementLabelName = "trackName")]
        public List<FeedbackTrack> tracks = new List<FeedbackTrack>();

        public float TotalDuration => tracks.Count > 0 ? tracks.Max(t => t.TotalDuration) : 0f;

        public RuntimeFeedback CreateRuntimeFeedback()
        {
            return RuntimeFeedback.FromTemplate(this);
        }

        [Button("Preview", ButtonSizes.Medium)]
        [EnableIf("@UnityEngine.Application.isPlaying")]
        public void Preview()
        {
            if (!Application.isPlaying)
            {
                Debug.LogWarning("[FeedbackData] Preview is only available in Play mode.");
                return;
            }

            if (FeedbackManager.Instance == null)
            {
                Debug.LogWarning("[FeedbackData] Preview failed: FeedbackManager not found in scene. Add a GameObject with FeedbackManager component.");
                return;
            }

            FeedbackManager.Instance.Play(this);
            Debug.Log($"[FeedbackData] Previewing '{feedbackName}' (Duration: {TotalDuration:F2}s)");
        }
    }

    public partial class FeedbackData
    {
        public FeedbackTrack Track(string name)
        {
            FeedbackTrack track = tracks.FirstOrDefault(t => t.trackName == name);
            if (track == null)
            {
                Debug.LogWarning($"[FeedbackData] Track '{name}' not found in FeedbackData '{feedbackName}'.");
            }

            return track;
        }

        public FeedbackClip Clip(string trackName, Func<FeedbackClip, bool> predicate)
        {
            FeedbackTrack track = Track(trackName);
            if (track == null) return null;

            FeedbackClip clip = track.clips.FirstOrDefault(predicate);
            if (clip == null)
            {
                Debug.LogWarning($"[FeedbackData] Clip matching predicate not found in Track '{trackName}' of FeedbackData '{feedbackName}'.");
            }

            return clip;
        }

        public FeedbackClip Clip<T>(string trackName) where T : FeedbackActionBase
        {
            return Clip(trackName, c => c.action != null && c.action.GetType() == typeof(T));
        }

        public FeedbackClip Clip(string trackName, string clipName)
        {
            return Clip(trackName, c => c.clipName == clipName);
        }

        public T Action<T>(string trackName) where T : FeedbackActionBase
        {
            FeedbackTrack track = Track(trackName);
            FeedbackClip clip = track?.clips.FirstOrDefault(c => c.action != null && c.action.GetType() == typeof(T));
            return clip?.action as T;
        }

        public bool CanPlay()
        {
            return FeedbackPlaybackGate.CanPlay(this);
        }

        public void RecordPlay()
        {
            FeedbackPlaybackGate.RecordPlay(this);
        }
    }

    /// <summary>
    /// 单次播放使用的可变运行时副本。它保留来源模板，用于限流、Stop 匹配和调试。
    /// </summary>
    public sealed class RuntimeFeedback
    {
        private static int _nextRuntimeId;

        public readonly int runtimeId;
        public FeedbackData templateData;
        public string feedbackName;
        public FeedbackPlaybackStrategy playbackStrategy;
        public FeedbackTimeSettings defaultTimeSettings;
        public List<FeedbackTrack> tracks = new List<FeedbackTrack>();

        public float TotalDuration => tracks.Count > 0 ? tracks.Max(t => t.TotalDuration) : 0f;

        private RuntimeFeedback()
        {
            runtimeId = ++_nextRuntimeId;
        }

        public static RuntimeFeedback FromTemplate(FeedbackData template)
        {
            if (template == null) return null;

            return new RuntimeFeedback
            {
                templateData = template,
                feedbackName = template.feedbackName,
                playbackStrategy = template.playbackStrategy,
                defaultTimeSettings = FeedbackRuntimeCloneUtility.CloneSerialized(template.defaultTimeSettings),
                tracks = template.tracks?.Select(track => track?.CreateRuntimeCopy()).ToList() ?? new List<FeedbackTrack>()
            };
        }

        public FeedbackTrack Track(string name)
        {
            FeedbackTrack track = tracks.FirstOrDefault(t => t.trackName == name);
            if (track == null)
            {
                Debug.LogWarning($"[RuntimeFeedback] Track '{name}' not found in RuntimeFeedback '{feedbackName}'.");
            }

            return track;
        }

        public FeedbackClip Clip(string trackName, Func<FeedbackClip, bool> predicate)
        {
            FeedbackTrack track = Track(trackName);
            if (track == null) return null;

            FeedbackClip clip = track.clips.FirstOrDefault(predicate);
            if (clip == null)
            {
                Debug.LogWarning($"[RuntimeFeedback] Clip matching predicate not found in Track '{trackName}' of RuntimeFeedback '{feedbackName}'.");
            }

            return clip;
        }

        public FeedbackClip Clip<T>(string trackName) where T : FeedbackActionBase
        {
            return Clip(trackName, c => c.action != null && c.action.GetType() == typeof(T));
        }

        public FeedbackClip Clip(string trackName, string clipName)
        {
            return Clip(trackName, c => c.clipName == clipName);
        }

        public T Action<T>(string trackName) where T : FeedbackActionBase
        {
            FeedbackTrack track = Track(trackName);
            FeedbackClip clip = track?.clips.FirstOrDefault(c => c.action != null && c.action.GetType() == typeof(T));
            return clip?.action as T;
        }
    }

    /// <summary>
    /// 运行时播放限流服务。限流语义属于模板来源，但状态不能保存在 FeedbackData 资产实例中。
    /// </summary>
    public static class FeedbackPlaybackGate
    {
        private struct PlayRecord
        {
            public float lastPlayTime;
            public int lastPlayFrame;
        }

        private static readonly Dictionary<FeedbackData, PlayRecord> PlayRecords = new Dictionary<FeedbackData, PlayRecord>();

        public static bool CanPlay(FeedbackData data)
        {
            if (data == null) return false;
            if (!data.limitPlay) return true;

            PlayRecords.TryGetValue(data, out PlayRecord record);

            if (Time.unscaledTime < record.lastPlayTime)
            {
                record.lastPlayTime = -9999f;
                record.lastPlayFrame = -1;
                PlayRecords[data] = record;
            }

            if (data.minPlayInterval <= 0f)
            {
                return Time.frameCount != record.lastPlayFrame;
            }

            return Time.unscaledTime - record.lastPlayTime >= data.minPlayInterval;
        }

        public static void RecordPlay(FeedbackData data)
        {
            if (data == null || !data.limitPlay) return;

            PlayRecords[data] = new PlayRecord
            {
                lastPlayFrame = Time.frameCount,
                lastPlayTime = Time.unscaledTime
            };
        }
    }
}