using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Video;

public class StandbyVideoManager : MonoBehaviour
{
    public RawImage videoDisplay;  // UI上的RawImage
    public VideoPlayer videoPlayer; // VideoPlayer 组件
    public GameObject uiPanel;  // UI 界面的根面板
    public float standbyTime = 10f;  // 待机时间（秒）

    private bool isVideoPlaying = false;
    private float lastInputTime;

    public static StandbyVideoManager _ins;

    public static void Create()
    {
        if (_ins) return;
        GameObject o = Instantiate(Resources.Load<GameObject>("StandbyVideoManager"));
        DontDestroyOnLoad(o);
        _ins = o.GetComponent<StandbyVideoManager>();
        //添加一个父物体
        o.transform.SetParent(ViewMgr.Instance.transform.Find("1").transform);
        CanvasScaler canvasScaler = o.transform.Find("Canvas").GetComponent<CanvasScaler>();
        if (canvasScaler != null)
        {
            Destroy(canvasScaler);
        }
        RectTransform rectTransform = canvasScaler.GetComponent<RectTransform>();
        rectTransform.anchorMin = Vector2.zero;      // 左下角对齐父级
        rectTransform.anchorMax = Vector2.one;       // 右上角对齐父级
        rectTransform.offsetMin = Vector2.zero;      // 移除左下角偏移
        rectTransform.offsetMax = Vector2.zero;      // 移除右上角偏移
        rectTransform.localScale = Vector3.one;      // 确保缩放为 1

        _ins.TriggerStandbyMode();
    }

    void Start()
    {
        videoDisplay.gameObject.SetActive(false);  // 初始时隐藏视频
        videoPlayer.loopPointReached += OnVideoEnd;  // 监听视频播放完毕
        videoPlayer.isLooping = true;  // 设置视频循环播放
        ResetIdleTimer();  // 初始化计时器
    }

    void Update()
    {
        DetectUserInput();

        // 判断是否达到待机时间
        if (!isVideoPlaying && Time.time - lastInputTime > standbyTime)
        {
            PlayStandbyVideo();
        }

        // 监听鼠标或键盘输入退出视频
        if (isVideoPlaying && (Input.anyKeyDown || Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y") != 0))
        {
            StopVideo();
        }
    }

    // 检测用户交互重置计时器
    private void DetectUserInput()
    {
        // 用户输入重置计时器
        if (Input.anyKeyDown || Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y") != 0)
        {
            ResetIdleTimer();
        }
    }

    // 重置待机计时器
    private void ResetIdleTimer()
    {
        lastInputTime = Time.time;
    }

    // 进入待机视频
    public void PlayStandbyVideo()
    {
        videoDisplay.gameObject.SetActive(true);  // 显示视频
        videoPlayer.Play();
        isVideoPlaying = true;
    }

    // 停止视频，回到 UI
    public void StopVideo()
    {
        videoPlayer.Stop();
        videoDisplay.gameObject.SetActive(false);  // 隐藏视频
        isVideoPlaying = false;
        ResetIdleTimer();
    }

    // 视频播放结束后自动回到UI
    private void OnVideoEnd(VideoPlayer vp)
    {
        // 仅当视频没有被手动停止时才执行
        if (isVideoPlaying)
        {
            videoPlayer.Play();  // 重新开始播放
        }
    }

    // 手动调用进入待机状态
    public void TriggerStandbyMode()
    {
        PlayStandbyVideo();
    }
}