using System;
using System.Diagnostics;
using System.IO;
using System.Threading;

namespace ConsoleApp4
{
    class Program
    {
        static string[] types = { ".mp4", ".mkv", ".flv", ".mov", ".webm", ".avi" };
        static Process current_proc = null;
        static void check_thread()
        {
            while(true)
            {
                if (current_proc != null)
                {
                    string input_ = Console.ReadLine();
                    current_proc.StandardInput.WriteLine(input_);
                }
                Thread.Sleep(50);
            }
        }
        static bool is_video(string file)
        {
            foreach(string type in types)
            {
                if (file.Contains(type))
                    return true;
            }
            return false;
        }
        static string get_file_type(string file)
        {
            foreach (string type in types)
            {
                if (file.Contains(type))
                    return type;
            }
            return "";
        }
        static void Main(string[] args)
        {
            Console.WriteLine("Would you like to delete the original files after they have been formatted? (y/n)");
            string szDeleteFileAfter = Console.ReadLine();
            bool bDeleteFileAfter = szDeleteFileAfter.Contains("y");

            string path = Directory.GetCurrentDirectory() + "\\";
            string[] files = Directory.GetFiles(path);
            string[] filtered = { };
            foreach(string file in files)
            {
                if(is_video(file))
                {
                    Array.Resize(ref filtered, filtered.Length + 1);
                    filtered[filtered.Length - 1] = file;
                }
            }
            Thread t = new Thread((ThreadStart)check_thread);
            t.Start();


            foreach (string file in filtered)
            {
                string file_type = get_file_type(file);
                string output = (file.Replace(file_type, "") + "_output" + file_type);
                string input = file;
                string command = "ffmpeg -i \u201D" + input + "\u201D \u201D" + output + "\u201D & exit";

                Process p = new Process();
                p.StartInfo.UseShellExecute = false;
                p.StartInfo.CreateNoWindow = false;
                p.StartInfo.RedirectStandardOutput = true;
                p.StartInfo.RedirectStandardInput = true;
                p.StartInfo.FileName = "cmd.exe";
                p.StartInfo.Arguments = command;
                p.Start();

                p.StandardInput.WriteLine(command);
                current_proc = p;

                p.WaitForExit();
                if (bDeleteFileAfter)
                {
                    File.Delete(file);
                }
            }
            t.Abort();
        }
    }
}