using System;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Input;
using System.Windows.Threading;

namespace XHWK.WKTool
{
    using system;

    /// <summary>
    ///     视频剪辑
    ///     VideoClipWindow.xaml 的交互逻辑
    /// </summary>
    public partial class VideoClipWindow
    {
        /// <summary>
        ///     视频地址
        /// </summary>
        string _videoPath;

        /// <summary>
        ///     视频剪辑
        /// </summary>
        public VideoClipWindow()
        {
            InitializeComponent();
            Width = App.W_XHMicroLessonSystemWindow.ActualWidth;
            Height = App.W_XHMicroLessonSystemWindow.ActualHeight;
        }

        public bool InitClipVideo(string mVideoPath)
        {
            if (FileToolsCommon.IsExistFile(mVideoPath))
            {
                _videoPath = mVideoPath;
                QsMovie.Source = new Uri(_videoPath);
                double prop = QsMovie.NaturalVideoHeight / (double)QsMovie.NaturalVideoWidth;
                double gridWidth = GridMovie.ActualHeight / prop;
                if (gridWidth <= GridMovie.ActualWidth)
                {
                    QsMovie.Width = gridWidth;
                    QsMovie.Height = GridMovie.ActualHeight;
                }
                else
                {
                    QsMovie.Height = GridMovie.ActualWidth * prop;
                    QsMovie.Width = GridMovie.ActualWidth;
                }
                DataContext = App.PageContextData;
            }
            else
            {
                return false;
            }
            return true;
        }

        /// <summary>
        ///     计时器
        /// </summary>
        DispatcherTimer _dispatcherTimer = new System.Windows.Threading.DispatcherTimer(); // 定义一个DT

        /// <summary>
        ///     播放/暂停
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Play_Click(object sender, RoutedEventArgs e)
        {
            if (_isPlay)
            {
                MoviePause();
            }
            else
            {
                MoviePlay();
            }
        }

        /// <summary>
        ///     正在播放
        /// </summary>
        bool _isPlay;

        /// <summary>
        ///     播放
        /// </summary>
        public void MoviePlay()
        {
            _isPlay = true;
            ImgPlay.Visibility = Visibility.Collapsed;
            ImgPause.Visibility = Visibility.Visible;
            QsMovie.Play();
        }

        /// <summary>
        ///     暂停
        /// </summary>
        public void MoviePause()
        {
            _isPlay = false;
            ImgPlay.Visibility = Visibility.Visible;
            ImgPause.Visibility = Visibility.Collapsed;
            QsMovie.Pause();
        }

        /// <summary>
        ///     slider滑动值随播放内容位置变化
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dispatcherTimer_Tick(object sender, EventArgs e)
        {
            TimelineSlider.Value = QsMovie.Position.TotalMilliseconds; //slider滑动值随播放内容位置变化
            LblProgress.Content = new TimeSpan(
                0,
                0,
                0,
                0,
                (int)QsMovie.Position.TotalMilliseconds
            ).ToString(@"hh\:mm\:ss");
        }

        /// <summary>
        ///     拖动进度条
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void TimelineMDown(object sender, EventArgs e)
        {
            _dispatcherTimer.Stop();
        }

        /// <summary>
        ///     拖动进度条
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void TimelineMUp(object sender, EventArgs e)
        {
            QsMovie.Position = new TimeSpan(
                0,
                0,
                0,
                0,
                (int)TimelineSlider.Value
            );
            _dispatcherTimer.Start();
            MoviePlay();
        }

        /// <summary>
        ///     加载视频
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void QS_Movie_Loaded(object sender, RoutedEventArgs e)
        {
            //GridMovie.Height
            UcSlider.SilderWidth = (int)TimelineSlider.ActualWidth;
            MoviePlay();
            while (QsMovie.NaturalVideoWidth == 0)
            {
                System.Threading.Thread.Sleep(50);
            }
            MoviePause();

            //new Thread(new ThreadStart(new Action(() =>
            //{
            //    Dispatcher.Invoke(() =>
            //    {
            //});
            //}))).Start();
        }

        /// <summary>
        ///     关闭
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            //this.Close();
            QsMovie.Stop();
            _isPlay = false;
            ImgPlay.Visibility = Visibility.Visible;
            ImgPause.Visibility = Visibility.Collapsed;
            UcSlider.StartValue = 0;
            TimelineSlider.Value = 0;
            _dispatcherTimer.Stop();
            Hide();
        }

        double _statime;

        private void UcSlider_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            //dispatcherTimer.Stop();
            _statime = UcSlider.StartValue;
        }

        private void UcSlider_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            if (Math.Abs(UcSlider.StartValue - _statime) > 100)
            {
                _dispatcherTimer.Stop();
                TimelineSlider.Value = UcSlider.StartValue;
                QsMovie.Position = new TimeSpan(
                    0,
                    0,
                    0,
                    0,
                    (int)TimelineSlider.Value
                );
                _dispatcherTimer.Start();
                UcSlider_PreviewMouseMove(null, null);
                MoviePlay();
            }
        }

        private void UcSlider_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            TxbStartTime.Text = new TimeSpan(
                0,
                0,
                0,
                0,
                (int)UcSlider.StartValue
            ).ToString(@"hh\:mm\:ss\.fff");
            TxbEndTime.Text = new TimeSpan(
                0,
                0,
                0,
                0,
                (int)UcSlider.EndValue
            ).ToString(@"hh\:mm\:ss\.fff");
            LblVideoTime.Content = new TimeSpan(
                0,
                0,
                0,
                0,
                ((int)UcSlider.EndValue - (int)UcSlider.StartValue)
            ).ToString(@"hh\:mm\:ss\.fff");
            //LblStartTime.Content = new TimeSpan(0, 0, 0, 0, (int)UcSlider.StartValue).ToString(@"hh\:mm\:ss");
            //LblEndTime.Content = new TimeSpan(0, 0, 0, 0, (int)UcSlider.EndValue).ToString(@"hh\:mm\:ss");
            //LblVideoTime.Content = new TimeSpan(0, 0, 0, 0, ((int)(UcSlider.EndValue - (UcSlider.EndValue % 1000)) - (int)(UcSlider.StartValue - (UcSlider.StartValue % 1000)))).ToString(@"hh\:mm\:ss");
        }

        /// <summary>
        ///     剪辑
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void BtnClip_Click(object sender, RoutedEventArgs e)
        {
            if ((UcSlider.EndValue - UcSlider.StartValue) < 1000)
            {
                MessageWindow.Show("剪辑时间不得小于1秒！");
                return;
            }
            _dispatcherTimer.Stop();
            MoviePause();
            string extension = FileToolsCommon.GetIoExtension(_videoPath);
            string fileName = FileToolsCommon.GetIoFileNameNoExtension(_videoPath);
            System.Windows.Forms.SaveFileDialog saveDg = new System.Windows.Forms.SaveFileDialog();
            saveDg.Filter = @"(*" + extension + @")|*" + extension; // + "|(*.MP4)|*.MP4";
            //saveDg.FileName = tableName + DateTime.Now.ToString("yyyy-MM-dd_hh-mm-ss") + "";
            saveDg.FileName = fileName + "剪辑";
            saveDg.AddExtension = true;
            saveDg.RestoreDirectory = true;
            if (saveDg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                string filePath = saveDg.FileName;
                //duration.ToString(@"dd\.hh\:mm\:ss");
                TimeSpan startTp = new TimeSpan(
                    0,
                    0,
                    0,
                    0,
                    (int)UcSlider.StartValue
                );
                string startTime = startTp.ToString(@"hh\:mm\:ss\.fff");
                TimeSpan endTp = new TimeSpan(
                    0,
                    0,
                    0,
                    0,
                    (int)UcSlider.EndValue
                );
                string endTime = endTp.ToString(@"hh\:mm\:ss\.fff");
                App.FFmpeg.ClipVideo(
                    _videoPath,
                    startTime,
                    endTime,
                    filePath
                );
                MessageBoxResult br = MessageWindow.Show(
                    "剪辑完成是否打开文件夹？",
                    "剪辑",
                    MessageBoxButton.OKCancel
                );
                if (br == MessageBoxResult.OK)
                {
                    //System.Diagnostics.Process.Start(FileToolsCommon.GetDirectoryName(filePath));
                    System.Diagnostics.Process.Start("explorer.exe", "/select," + filePath);
                }
            }
        }

        /// <summary>
        ///     输入开始时间
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void TxbStartTime_LostFocus(object sender, RoutedEventArgs e)
        {
            //判断是否为时间格式
            if (!TimeStrRegularJudg(TxbStartTime.Text))
            {
                MessageWindow.Show("请输入正确的时间格式：hh:mm:ss.fff");
                return;
            }
            TimeSpan time = ConvertToTimeSpan(TxbStartTime.Text);
            if (time.TotalMilliseconds > UcSlider.EndValue)
            {
                MessageWindow.Show("开始时间不能大于结束时间！");
                return;
            }
            if (time.TotalMilliseconds > QsMovie.NaturalDuration.TimeSpan.TotalMilliseconds - 1000 || time.TotalMilliseconds > UcSlider.EndValue - 1000)
            {
                MessageWindow.Show("剪辑时间不能小于1秒！");
                return;
            }
            UcSlider.StartValue = time.TotalMilliseconds;
            UcSlider_PreviewMouseLeftButtonUp(null, null);
        }

        /// <summary>
        ///     输入结束时间
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void TxbEndTime_LostFocus(object sender, RoutedEventArgs e)
        {
            //判断是否为时间格式
            if (!TimeStrRegularJudg(TxbEndTime.Text))
            {
                MessageWindow.Show("请输入正确的时间格式：hh:mm:ss.fff");
                return;
            }
            TimeSpan time = ConvertToTimeSpan(TxbEndTime.Text);
            if (time.TotalMilliseconds < UcSlider.StartValue)
            {
                MessageWindow.Show("结束时间不能小于开始时间！");
                return;
            }
            if (time.TotalMilliseconds < UcSlider.StartValue + 1000)
            {
                MessageWindow.Show("剪辑时间不能小于1秒！");
                return;
            }
            if (time.TotalMilliseconds > QsMovie.NaturalDuration.TimeSpan.TotalMilliseconds)
            {
                MessageWindow.Show("结束时间不能超出视频总时长！");
                return;
            }
            UcSlider.EndValue = time.TotalMilliseconds;
            UcSlider_PreviewMouseLeftButtonUp(null, null);
        }

        /// <summary>
        ///     string转TimeSpan
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public TimeSpan ConvertToTimeSpan(string str)
        {
            int day = 0;
            int hour = 0;
            int min = 0;
            int sec = 0;
            int mil = 0;
            string[] strArray1 = str.Split(':');
            try
            {
                if (strArray1[0].Contains("."))
                {
                    string[] strArray2 = strArray1[0].Split('.');
                    day = Convert.ToInt32(strArray2[0]);
                    hour = Convert.ToInt32(strArray2[1]);
                }
                else
                {
                    day = 0;
                    hour = Convert.ToInt32(strArray1[0]);
                }
                min = Convert.ToInt32(strArray1[1]);
                if (strArray1[2].Contains("."))
                {
                    string[] strArray3 = strArray1[2].Split('.');
                    sec = Convert.ToInt32(strArray3[0]);
                    mil = Convert.ToInt32(strArray3[1]);
                }
                else
                {
                    sec = Convert.ToInt32(strArray1[2]);
                }
            }
            catch (Exception)
            {
                // ignored
            }
            return new TimeSpan(
                day,
                hour,
                min,
                sec,
                mil
            );
        }

        /// <summary>
        ///     判断是否为时间格式
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public bool TimeStrRegularJudg(string str)
        {
            try
            {
                Regex reg = new Regex(@"^((20|21|22|23|[0-1]?\d):[0-5]?\d:[0-5]?\d.\d\d\d)$");
                return reg.IsMatch(str);
            }
            catch (Exception)
            {
                return false;
            }
        }

        /// <summary>
        ///     鼠标点击移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Title_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            DragMove();
        }

        /// <summary>
        ///     启动定时器 同步进度条和视频进度
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Element_MediaOpened(object sender, RoutedEventArgs e)
        {
            TimelineSlider.Maximum = QsMovie.NaturalDuration.TimeSpan.TotalMilliseconds; //设置slider最大值
            UcSlider.Maximum = QsMovie.NaturalDuration.TimeSpan.TotalMilliseconds;
            UcSlider.StartValue = 0;
            UcSlider.EndValue = QsMovie.NaturalDuration.TimeSpan.TotalMilliseconds;
            UcSlider_PreviewMouseMove(null, null);
            _dispatcherTimer.Tick += dispatcherTimer_Tick; //超过计时间隔时发生
            _dispatcherTimer.Interval = new TimeSpan(
                0,
                0,
                0,
                0,
                500
            ); //DT间隔
            _dispatcherTimer.Start(); //DT启动 

            #region 调整视频大小

            double prop = QsMovie.NaturalVideoHeight / (double)QsMovie.NaturalVideoWidth;
            double gridWidth = GridMovie.ActualHeight / prop;
            if (gridWidth <= GridMovie.ActualWidth)
            {
                QsMovie.Width = gridWidth;
                QsMovie.Height = GridMovie.ActualHeight;
            }
            else
            {
                QsMovie.Height = GridMovie.ActualWidth * prop;
                QsMovie.Width = GridMovie.ActualWidth;
            }

            #endregion
        }
    }
}