using DG.Tweening;
using System;
using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Video;

public class LoadingPanel : MonoBehaviour, ILoadingPanel
{
    public Image image_Bg;
    public Action actionEnd;
    public float fadeTime = 1.3f;

    /// <summary>过场视频显示的 RawImage（LoadPanel 预制体子节点 0），显示常驻 VideoPlayer 投影的共享 RenderTexture</summary>
    private RawImage videoImage;

    /// <summary>常驻过场视频播放器（UIManager.loadVideoPlayer，挂在场景常驻 Manager 物体上；加载面板只是显示它的输出，不自己播放）</summary>
    private VideoPlayer loadVideo;

    private void Awake()
    {
        if (transform.childCount > 0)
            videoImage = transform.GetChild(0).GetComponent<RawImage>();
    }

    /// <summary>设置背景图</summary>
    public void SetBackground(Sprite sprite)
    {
        image_Bg.sprite = sprite;
    }

    /// <summary>注册播放结束回调</summary>
    public void SetOnEnd(Action action)
    {
        actionEnd = action;
    }

    private void Start()
    {
        // ⭐ 视频播放期间预载大厅主面板：把 HomeUIRes 的加载提前到这段视频等待时间里，
        //   登录成功 UILoginPanel.Succeed() 的 ShowAsync(HomeMainPanel) 命中缓存秒开，
        //   不再出现"登录成功后进大厅白等"。
        StartCoroutine(PreloadHomeMainRoutine());
        StartCoroutine(BindLoadVideoRoutine());
    }

    /// <summary>播放过程中预载大厅主面板（避免大包解压和视频启动抢主线程）</summary>
    private IEnumerator PreloadHomeMainRoutine()
    {
        // 1) 等常驻过场视频真正起播（最多等 5 秒兜底，防止视频未播时死等）
        float waited = 0f;
        while ((loadVideo == null || !loadVideo.isPlaying) && waited < 5f)
        {
            waited += Time.deltaTime;
            yield return null;
        }
        yield return new WaitForSeconds(0.5f); // 让视频先渲染几帧，起播更顺
        // 2) 播放过程中加载：等 UIManager 就绪后发起预载
        while (UIManager.Instance == null)
            yield return null;
        yield return null; // 等 UIManager 初始化完成（地址表装载）
        UIManager.Instance.PreloadPanel(UIPanel.HomeMainPanel);
    }

    /// <summary>
    /// 常驻过场视频由 UIManager.loadVideoPlayer 播放并投影到共享 RenderTexture，
    /// 这里等它就绪后监听 loopPointReached：视频第一遍循环播放完毕时隐藏跳过按钮。
    /// （面板销毁时协程终止；OnDestroy 里也会解除监听）
    /// </summary>
    private IEnumerator BindLoadVideoRoutine()
    {
        while (loadVideo == null)
        {
            yield return null;
            if (UIManager.Instance == null) continue;
            loadVideo = UIManager.Instance.loadVideoPlayer;
        }
        loadVideo.loopPointReached += OnFirstLoopPointReached;
    }

    /// <summary>视频第一遍播完：隐藏跳过按钮并解除监听</summary>
    private void OnFirstLoopPointReached(VideoPlayer vp)
    {
        vp.loopPointReached -= OnFirstLoopPointReached;
        loadVideo = null;
        HideSkipButton();
    }

    private void OnDestroy()
    {
        if (loadVideo != null)
            loadVideo.loopPointReached -= OnFirstLoopPointReached;
    }

    private void HideSkipButton()
    {
        if (GameManager.Instance != null && GameManager.Instance.btn_Skip != null)
            GameManager.Instance.btn_Skip.gameObject.SetActive(false);
    }

    /// <summary>
    /// 进入条进度值
    /// </summary>
    /// <param name="count">最大100 100时直接删除</param>
    public void LoadBar(int count)
    {
        if (count == 100)
        {
            // ⭐ 兜底再预载一次：若启动时 UIManager 尚未就绪导致首次发起无效，这里补上
            if (UIManager.Instance != null)
                UIManager.Instance.PreloadPanel(UIPanel.HomeMainPanel);

            HideSkipButton();

            Destroy(gameObject, fadeTime);
            if (videoImage != null && videoImage.gameObject.activeSelf)
            {
                videoImage.DOFade(0, fadeTime);
            }
            if (image_Bg != null && image_Bg.gameObject.activeSelf)
            {
                image_Bg.DOFade(0, fadeTime);
            }
            actionEnd?.Invoke();
        }
    }
}