using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Playables;
using Yarn.Unity;

public class TimelineManager : MonoBehaviour
{
    public static TimelineManager Instance { get; private set; }

    // 使用字典来管理多个PlayableDirector
    private Dictionary<string, PlayableDirector> directors = new Dictionary<string, PlayableDirector>();

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject); // 不销毁
        }
        else
        {
            Destroy(gameObject);
            return;
        }

        // 自动注册所有子对象中的PlayableDirector
        RegisterAllDirectors();
    }

    /// <summary>
    /// 自动注册所有子对象中的PlayableDirector
    /// </summary>
    private void RegisterAllDirectors()
    {
        var allDirectors = GetComponentsInChildren<PlayableDirector>();
        foreach (var director in allDirectors)
        {
            if (director.playableAsset != null)
            {
                RegisterDirector(director.playableAsset.name, director);
            }
        }
    }

    /// <summary>
    /// 注册PlayableDirector
    /// </summary>
    /// <param name="name">Timeline的名称</param>
    /// <param name="director">PlayableDirector实例</param>
    public void RegisterDirector(string name, PlayableDirector director)
    {
        if (!directors.ContainsKey(name))
        {
            directors.Add(name, director);
            Debug.Log($"Registered PlayableDirector for {name}");
        }
    }

    /// <summary>
    /// 播放指定的Timeline并等待其完成
    /// </summary>
    /// <param name="name">Timeline的名称</param>
    [YarnCommand("play_timeline")]
    public IEnumerator PlayTimeline(string name)
    {
        if (directors.TryGetValue(name, out var director))
        {
            director.Play();
            Debug.Log($"Timeline {name} playing.");

            // 等待Timeline播放完成
            bool isPlaying = true;
            director.stopped += (PlayableDirector aDirector) => { isPlaying = false; };

            while (isPlaying)
            {
                yield return null;
            }

            Debug.Log($"Timeline {name} finished.");
            director.Stop();

            // 启动重置时间的协程，但不等待其完成
            StartCoroutine(ResetDirectorTimeCoroutine(name));
        }
        else
        {
            Debug.LogError($"PlayableDirector for {name} not found.");
        }
    }

    private IEnumerator ResetDirectorTimeCoroutine(string name)
    {
        yield return new WaitForSeconds(2f);
        ResetDirectorTime(name);
    }

    /// <summary>
    /// 重置PlayableDirector的时间
    /// </summary>
    /// <param name="name">Timeline的名称</param>
    public void ResetDirectorTime(string name)
    {
        if (directors.TryGetValue(name, out var director))
        {
            director.time = 0;
            director.Evaluate(); // 评估以应用时间重置
            Debug.Log($"Timeline {name} time reset.");
        }
        else
        {
            Debug.LogError($"PlayableDirector for {name} not found.");
        }
    }

    /// <summary>
    /// 暂停指定的Timeline
    /// </summary>
    /// <param name="name">Timeline的名称</param>
    // [YarnCommand("pause_timeline")]
    public void PauseTimeline(string name)
    {
        if (directors.TryGetValue(name, out var director))
        {
            director.Pause();
            Debug.Log($"Timeline {name} paused.");
        }
        else
        {
            Debug.LogError($"PlayableDirector for {name} not found.");
        }
    }
}