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

/// <summary>
/// 媒体预览
/// </summary>
public class MediaPreviewPanel : PanelBasic
{
    private RectTransform operation_area;
    private RectTransform header_area;

    //交互按钮及文本
    private Image audio_preview_panel;
    private TextMeshProUGUI name_text;
    private TextMeshProUGUI progress_text;
    private CustomSlider progress_slider;
    private Button play_button;
    private Button stop_button;
    private Button fast_forward_button;
    private Button fast_rewind_button;
    private Button close_button;
    private Button zoom_button;

    //音频组件
    private AudioSource audio_source;

    //计时属性
    private int currentHour;
    private int currentMinute;
    private int currentSecond;
    private int clipHour;
    private int clipMinute;
    private int clipSecond;

    //图片精灵
    public Sprite play_sprite;
    public Sprite pause_sprite;
    public Sprite zoom_in_sprite;
    public Sprite zoom_out_sprite;

    //视频
    private Image video_preview_panel;

    //private TextMeshProUGUI video_name_text;
    //private TextMeshProUGUI video_progress_text;
    //private CustomSlider video_progress_slider;
    //private Button video_play_button;
    //private Button video_stop_button;
    //private Button video_fast_forward_button;
    //private Button video_fast_rewind_button;
    //private Button video_close_button;

    private VideoPlayer video_player;
    private RectTransform video_player_rect;

    private CanvasGroup header_area_group;

    private bool is_video;
    // Start is called before the first frame update
    void Start()
    {
        video_player_rect = video_player.GetComponent<RectTransform>();
        header_area_group = header_area.GetComponent<CanvasGroup>();

        play_button.onClick.AddListener(OnPlay);
        stop_button.onClick.AddListener(OnStop);
        fast_forward_button.onClick.AddListener(OnFastForward);
        fast_rewind_button.onClick.AddListener(OnFastRewind);

        progress_slider.onValueStartChanged.AddListener(OnStartDragSlider);
        progress_slider.onValueChanged.AddListener(OnDragSlider);
        progress_slider.onValueEndChanged.AddListener(OnEndDragSlider);

        close_button.onClick.AddListener(OnPreviewPanelClose);

        zoom_button.onClick.AddListener(OnZoom);

        //视频播放结束事件
        video_player.loopPointReached += Video_player_loopPointReached;
    }

    // Update is called once per frame
    void Update()
    {
        UpdateProgress();
    }

    /// <summary>
    /// 播放、暂停
    /// </summary>
    void OnPlay()
    {
        if (is_video)
        {
            if (video_player != null)
            {
                if (video_player.isPlaying)
                {
                    video_player.Pause();
                    play_button.image.sprite = play_sprite;
                }
                else
                {
                    video_player.Play();
                    play_button.image.sprite = pause_sprite;
                }
            }
        }
        else
        {
            if (audio_source != null)
            {
                if (audio_source.isPlaying)
                {
                    audio_source.Pause();
                    play_button.image.sprite = play_sprite;
                }
                else
                {
                    if (audio_source.time == 0)//播放结束后time为0，再次播放时值不是0，强制更新一下
                        audio_source.time = 0;
                    audio_source.Play();
                    play_button.image.sprite = pause_sprite;
                }
            }
        }
    }

    /// <summary>
    /// 停止播放，进度条重置
    /// </summary>
    void OnStop()
    {
        if (is_video)
        {
            video_player?.Stop();
            if (video_player != null)
                video_player.frame = 0;
            play_button.image.sprite = play_sprite;
        }
        else
        {
            audio_source?.Pause();
            if (audio_source != null)
                audio_source.time = 0;
            play_button.image.sprite = play_sprite;
        }
        UpdateProgress(true);
    }

    /// <summary>
    /// 快进 默认5s
    /// </summary>
    void OnFastForward()
    {
        if (is_video)
        {
            if (video_player != null)
            {
                if (video_player.time != 0)
                    video_player.time += 5;
                else
                {
                    video_player.Pause();
                    video_player.time = 5;
                }
            }
        }
        else
        {
            if (audio_source != null)
            {
                if (audio_source.time != 0)
                    audio_source.time += 5;
                else
                {
                    audio_source.Pause();
                    audio_source.time = 5;
                }
            }
        }
        UpdateProgress(true);
    }

    /// <summary>
    /// 快退 默认5s
    /// </summary>
    void OnFastRewind()
    {
        if (is_video)
        {
            if (video_player != null)
            {
                if (video_player.time < 5)
                    video_player.time = 0;
                else
                    video_player.time -= 5;
            }
        }
        else
        {
            if (audio_source != null)
            {
                if (audio_source.time < 5)
                    audio_source.time = 0;
                else
                    audio_source.time -= 5;
            }
        }
        UpdateProgress(true);
    }

    /// <summary>
    /// 开始拖拽进度条
    /// </summary>
    void OnStartDragSlider()
    {
        if (is_video)
        {
            video_player?.Pause();
        }
        else
        {
            audio_source?.Pause();
        }
    }

    /// <summary>
    /// 拖拽进度条
    /// </summary>
    /// <param name="_value"></param>
    void OnDragSlider(float _value)
    {
        if (is_video)
        {
            if (video_player != null)
                video_player.time = _value * video_player.length;
        }
        else
        {
            if (audio_source != null)
                audio_source.time = _value * audio_source.clip.length;
        }
    }

    /// <summary>
    /// 结束拖拽进度条
    /// </summary>
    void OnEndDragSlider()
    {
        if (is_video)
        {
            video_player?.Play();
        }
        else
        {
            audio_source?.Play();
        }
    }

    /// <summary>
    /// 关闭预览面板
    /// </summary>
    void OnPreviewPanelClose()
    {
        if (is_video)
        {
            video_player?.Stop();
            video_player.targetTexture.Release();
            //video_player = null;
        }
        else
        {
            audio_source?.Stop();
            audio_source = null;
        }
        OnPopupEnd();
    }

    bool is_zoom_out;
    public float magnification = 2;
    public void OnZoom()
    {
        is_zoom_out = !is_zoom_out;
        zoom_button.image.sprite = is_zoom_out ? zoom_in_sprite : zoom_out_sprite;

        DOTween.To(() => video_player_rect.sizeDelta, (_size) => video_player_rect.sizeDelta = _size,
            is_zoom_out ? new Vector2(528, 297) * magnification : new Vector2(528, 297), 0.25f);
        //video_player_rect.sizeDelta = is_zoom_out ? new Vector2(528, 297) * magnification : new Vector2(528, 297);

        DOTween.To(() => operation_area.anchoredPosition, (_position) => operation_area.anchoredPosition = _position,
             is_zoom_out ? new Vector2(0, 195) : new Vector2(0, 260), 0.25f);

        header_area_group.interactable = !is_zoom_out;
        header_area_group.alpha = is_zoom_out ? 0 : 1;
    }

    /// <summary>
    /// 预览音频
    /// </summary>
    /// <param name="_file_name"></param>
    public void PreviewAudio(string _file_name)
    {
        //设置状态
        is_video = false;
        audio_preview_panel.gameObject.SetActive(true);
        video_preview_panel.gameObject.SetActive(false);
        play_button.image.sprite = pause_sprite;

        audio_source = MediaPlayer.Instance.audio_source;
        name_text.text = _file_name;

        //计算总时间
        clipHour = (int)audio_source.clip.length / 3600;
        clipMinute = (int)(audio_source.clip.length - clipHour * 3600) / 60;
        clipSecond = (int)(audio_source.clip.length - clipHour * 3600 - clipMinute * 60);
        audio_source.Play();

        //自适应UI位置
        header_area.anchoredPosition = new Vector2(0, -411);
        operation_area.anchoredPosition = new Vector2(0, 420);
    }
    /// <summary>
    /// 预览视频
    /// </summary>
    /// <param name="_file_name"></param>
    /// <param name="_url"></param>
    public void PreviewVideo(string _file_name, string _url)
    {
        //设置状态
        is_video = true;
        audio_preview_panel.gameObject.SetActive(false);
        video_preview_panel.gameObject.SetActive(true);
        play_button.image.sprite = pause_sprite;

        name_text.text = _file_name;

        video_player.url = _url;
        video_player.prepareCompleted += Video_player_prepareCompleted;
        video_player.Prepare();

        //自适应UI位置
        header_area.anchoredPosition = new Vector2(0, -245);
        operation_area.anchoredPosition = new Vector2(0, 260);
    }

    private void Video_player_loopPointReached(VideoPlayer source)
    {
        //播放完成后重置图标状态
        play_button.image.sprite = play_sprite;
    }

    private void Video_player_prepareCompleted(VideoPlayer source)
    {
        clipHour = (int)video_player.length / 3600;
        clipMinute = (int)(video_player.length - clipHour * 3600) / 60;
        clipSecond = (int)(video_player.length - clipHour * 3600 - clipMinute * 60);
        video_player.Play();
    }
    bool playing;
    private void UpdateProgress(bool _update_anyway = false)
    {
        if (!is_video)
        {
            if (_update_anyway || (audio_source != null && audio_source.isPlaying))
            {
                playing = true;
                //计算当前时间
                currentHour = (int)audio_source.time / 3600;
                currentMinute = (int)(audio_source.time - currentHour * 3600) / 60;
                currentSecond = (int)(audio_source.time - currentHour * 3600 - currentMinute * 60);

                progress_text.text = string.Format("{0:D2}:{1:D2}:{2:D2}/{3:D2}:{4:D2}:{5:D2}",
        currentHour, currentMinute, currentSecond, clipHour, clipMinute, clipSecond);
                //audio_progress_slider.value = audio_source.time / audio_source.clip.length;
                progress_slider.SetValueWithoutNotify(audio_source.time / audio_source.clip.length);


            }
            //播放结束后会自动停止，更新播放图标状态
            if (playing && audio_source != null)
            {
                play_button.image.sprite = audio_source.isPlaying ? pause_sprite : play_sprite;
            }
        }
        else
        {
            if (_update_anyway || (video_player != null && video_player.isPlaying))
            {
                //计算当前时间
                currentHour = (int)video_player.time / 3600;
                currentMinute = (int)(video_player.time - currentHour * 3600) / 60;
                currentSecond = (int)(video_player.time - currentHour * 3600 - currentMinute * 60);

                progress_text.text = string.Format("{0:D2}:{1:D2}:{2:D2}/{3:D2}:{4:D2}:{5:D2}",
        currentHour, currentMinute, currentSecond, clipHour, clipMinute, clipSecond);
                //audio_progress_slider.value = audio_source.time / audio_source.clip.length;
                if (video_player.frame == -1)
                {
                    progress_slider.SetValueWithoutNotify(0);
                }
                else
                {
                    var _progress = (float)(video_player.time / video_player.length);
                    progress_slider.SetValueWithoutNotify(_progress < 0 ? 0 : _progress);
                }
            }
        }
    }
}