using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using UnityEngine.Video;

/// <summary>
/// 视频播放器扩展组件
/// </summary>
public class VideoPlayerEx : MonoBehaviour
{
    public static VideoPlayerEx Instance;

    private void Awake()
    {
        Instance = this;
    }

    /// <summary>
    /// 视频播放组件
    /// </summary>
    public VideoPlayer videoPlayer;
    /// <summary>
    /// 播放面板RectTransform组件
    /// </summary>
    public RectTransform rectPlayer;
    /// <summary>
    /// 播放按钮
    /// </summary>
    public Button btnPlay;
    /// <summary>
    /// 播放按钮图片
    /// </summary>
    public Sprite spPlay;
    /// <summary>
    /// 暂停按钮图片
    /// </summary>
    public Sprite spPause;
    /// <summary>
    /// 全屏按钮
    /// </summary>
    public Button btnFullscreen;
    /// <summary>
    /// 关闭按钮
    /// </summary>
    public Button btnClose;
    /// <summary>
    /// 视频片段
    /// </summary>
    public VideoClip Clip;
    /// <summary>
    /// 数据标题
    /// </summary>
    public Text txtTitle;
    /// <summary>
    /// 播放视频路径
    /// </summary>
    public string URL;
    /// <summary>
    /// 是否自动播放
    /// </summary>
    public bool PlayOnAwake;
    /// <summary>
    /// 视频时长
    /// </summary>
    [HideInInspector]
    public float VideoTime;

    public event UnityAction onVideoClosed;
    public event UnityAction onVideoPlayEnd;

    public bool IsShow;

    public float VideoProgress
    {
        get
        {
            return float.Parse(videoPlayer.frame.ToString())
                             / float.Parse(videoPlayer.frameCount.ToString());
        }
    }

    void Start()
    {
        if (btnPlay != null)
            btnPlay.onClick.AddListener(OnBtnPlayClick);
        if (btnFullscreen != null)
            btnFullscreen.onClick.AddListener(OnBtnFullScreenClick);
        if (btnClose != null)
            btnClose.onClick.AddListener(OnBtnCloseClick);

        videoPlayer.playOnAwake = PlayOnAwake;
        videoPlayer.clip = Clip;
        if (!string.IsNullOrEmpty(videoPlayer.url))
        {
            videoPlayer.url = URL;
        }

        if (videoPlayer.playOnAwake && (videoPlayer.clip != null || !string.IsNullOrEmpty(videoPlayer.url)))
        {
            btnPlay.GetComponent<Image>().sprite = spPause;
            isPlaying = true;
        }

        anim = GetComponent<Animator>();
    }

    #region 视频控制
    /// <summary>
    /// 暂停
    /// </summary>
    public void Pause()
    {
        videoPlayer.Pause();

        btnPlay.GetComponent<Image>().sprite = spPlay;

        isPlaying = false;
    }
    /// <summary>
    /// 停止
    /// </summary>
    public void Stop()
    {
        videoPlayer.Stop();

        btnPlay.GetComponent<Image>().sprite = spPlay;

        isPlaying = false;
    }
    /// <summary>
    /// 播放
    /// </summary>
    void Play()
    {
        if (!videoPlayer.isPaused)
        {
            if (!string.IsNullOrEmpty(URL))
            {
                videoPlayer.url = URL;
            }

            videoPlayer.loopPointReached += VideoPlayer_loopPointReached;
            videoPlayer.prepareCompleted += VideoPlayer_prepareCompleted;
        }
        videoPlayer.targetTexture.Release();
        videoPlayer.Play();

        btnPlay.GetComponent<Image>().sprite = spPause;

        isPlaying = true;
    }
    public void HideVideo()
    {
        if (isFullScreen)
            OnBtnFullScreenClick();

        HideComplete();
    }

    void HideComplete()
    {
        gameObject.SetActive(false);
        Stop();
        IsShow = false;
    }

    /// <summary>
    /// 播放
    /// </summary>
    public void Play(string url)
    {
        if (videoPlayer.isPlaying || videoPlayer.isPaused)
        {
            Stop();
        }
        URL = url;
        videoPlayer.url = URL;
        Play();
    }

    void VideoPlayer_prepareCompleted(VideoPlayer source)
    {
        VideoTime = GetTime();

        FitVideoSize();
    }

    void VideoPlayer_loopPointReached(VideoPlayer source)
    {
        btnPlay.GetComponent<Image>().sprite = spPlay;
        isPlaying = false;

        if(onVideoPlayEnd != null)
        {
            onVideoPlayEnd();
        }
    }
    #endregion

    #region 按钮事件
    public void OnBtnCloseClick()
    {
        Stop();

        if (onVideoClosed != null)
        {
            HideVideoPlayer();

            // videoPlayer.GetComponent<RectTransform>().localScale = Vector3.one;
            videoPlayer.targetTexture.Release();

            onVideoClosed();
        }
    }

    /// <summary>
    /// 是否全屏
    /// </summary>
    bool isFullScreen;
    public void OnBtnFullScreenClick()
    {
        if (isFullScreen)
        {
            isFullScreen = false;
            rectPlayer.localScale = Vector3.one * 0.6f;
        }
        else
        {
            isFullScreen = true;
            rectPlayer.localScale = Vector3.one;
        }
    }

    /// <summary>
    /// 是否正在播放
    /// </summary>
    [HideInInspector]
    public bool isPlaying;
    void OnBtnPlayClick()
    {
        if (videoPlayer.clip == null && string.IsNullOrEmpty(URL))
        {
            Debug.Log("请设置视频源");
        }
        else
        {
            if (isPlaying)
            {
                Pause();
            }
            else
            {
                Play();
            }
            btnPlay.GetComponent<Image>().sprite = isPlaying ? spPause : spPlay;
        }
    }
    #endregion

    #region 进度条控制
    /// <summary>
    /// 获取视频时长
    /// </summary>
    /// <returns></returns>
    public float GetTime()
    {
        return (videoPlayer.frameCount / videoPlayer.frameRate);
    }

    /// <summary>
    /// 设置播放时间点
    /// </summary>
    /// <param name="time"></param>
    public void SetTime(float time)
    {
        videoPlayer.frame = (long)(time * videoPlayer.frameRate);
        Play();
    }
    #endregion

    public void PlayVideo(string videoName, string title = null)
    {
        IsShow = true;

        txtTitle.text = title;

        URL = CommonData.VideoFullPath + videoName;

        if (H5Controller.GetPlatformType() == 0 || H5Controller.GetPlatformType() == 1)
        {
            Play(URL);
        }
    }

    public RawImage rawImage;
    /// <summary>
    /// 视频自适应
    /// </summary>
    void FitVideoSize()
    {
        float maxWidth = rawImage.rectTransform.rect.width;
        float maxHeight = rawImage.rectTransform.rect.height;
        // Debug.Log(maxWidth + "," + maxHeight);
        float width, height;
        float tw = videoPlayer.width;
        float th = videoPlayer.height;
        // Debug.Log(tw + "," + th);
        width = maxWidth;
        height = th * maxWidth / tw;
        if (height > maxHeight)
        {
            height = maxHeight;
            width = tw * maxHeight / th;

            videoPlayer.GetComponent<RectTransform>().localScale = new Vector2(width / maxWidth, 1);
        }
        else
        {
            videoPlayer.GetComponent<RectTransform>().localScale = new Vector2(1, height/ maxHeight);
        }
        // Debug.Log(width + "," + height);
    }

    Animator anim;
    public void ShowVideoPlayer()
    {
        if (anim != null)
        {
            anim.SetTrigger("Show");
        }

        AudioManager.Instance.PauseBackgroundMusic();
    }

    public void HideVideoPlayer()
    {
        if (anim != null)
        {
            anim.SetTrigger("Hide");
        }

        AudioManager.Instance.ResumeBackgroundMusic();
    }

    public GameObject obj;
    public bool isDrag;

    public void ShowProgress()
    {
        obj.SetActive(true);

        Invoke("HideProgress", 3f);
    }
    public void HideProgress()
    {
        if (!isDrag)
        {
            obj.SetActive(false);
        }
    }

}