using Microsoft.Expression.Drawing.Core;
using Microsoft.Extensions.Logging;
using Microsoft.Win32;
using System.IO;
using System.Windows;


namespace VideoConcat
{
    /// <summary>
    /// Video.xaml 的交互逻辑
    /// </summary>
    public partial class Video : Window
    {
        public string text = "";
        public FileSystemInfo[]? Floders { get; set; }
        public string[] Heads = [];
        public string[] Tails = [];
        public string[] Middles = [];

        public DirectoryInfo? Path { get; set; }


        public Video()
        {
            InitializeComponent();


        }

        private async void Button_Click(object sender, RoutedEventArgs e)
        {


            int count = 0;
            try
            {
                count = int.Parse(videoCount.Text);
            }
            catch (Exception)
            {

                MessageBox.Show("请输入正确的数字");
                return;
            }

            WriteTxt($"生成视频的个数:{videoCount.Text} 个");

            Check_Folder();


            startButton.IsEnabled = false;

            Array.ForEach(array: Middles, s =>
                                       {
                                           WriteTxt(s);
                                       });

            await Task.Run(() =>
            {


                for (int i = 0; i <= count; i++)
                {
                    System.Windows.Application.Current.Dispatcher.Invoke(() =>
                    {
                        processVideoBar.Dispatcher.Invoke(() =>
                        {
                            processVideoBar.Value = i;

                        });
                        outputTxt.Dispatcher.Invoke(new Action(() =>
                        {
                            WriteTxt("正在生成第" + i + "个视频");
                        }));
                    });
                    System.Threading.Thread.Sleep(50);
                }

                startButton.Dispatcher.Invoke(() =>
                {
                    startButton.IsEnabled = true;
                });

            });//ProcessVideo.RunTask(processVideoBar, startButton)
        }

        private void Check_Folder()
        {

            string currentPath = Directory.GetCurrentDirectory();
            Path = Directory.GetParent(currentPath);
            if (Path == null)
            {
                WriteTxt("获取相关视频文件目录失败！");
                return;
            }
            WriteTxt("当前目录为:" + Path.FullName);
            try
            {
                Boolean hasHead = false;
                Boolean hasTail = false;

                DirectoryInfo dirD = Path as DirectoryInfo;
                //获取文件夹下所有文件夹  
                Floders = dirD.GetDirectories();

                //对单个FileSystemInfo进行判断，如果是文件夹则进行递归操作  

                foreach (FileSystemInfo folder in Floders)
                {
                    WriteTxt($"{folder.Name}");

                    if (folder.Name == "head")
                    {
                        hasHead = true;
                        Heads = GetAllVideos($"{Path}\\{folder.Name}");
                        continue;

                    }
                    if (folder.Name == "tail")
                    {
                        hasTail = true;
                        Tails = GetAllVideos($"{Path}\\{folder.Name}");
                        continue;
                    }

                    Middles = Middles.Concat(GetAllVideos($"{Path}\\{folder.Name}")).ToArray();

                }
                if (!hasHead)
                {
                    WriteTxt("存在名称为head的文件夹，将作为视频开头！");
                }

                if (!hasTail)
                {
                    WriteTxt("存在名称为tail的文件夹，将作为视频结尾！");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return;
            }
        }

        private void WriteTxt(string str)
        {
            text += str + "\r\n";
            outputTxt.Text = text;
            scrowText.ScrollToEnd();
        }

        public static string[] GetAllVideos(string path)
        {
            return Directory.GetFiles(path, "*.mp4", SearchOption.AllDirectories);
        }
    }
}