using System.Diagnostics;
using System.Threading;

namespace TeamsNetphoneLink.Updater
{
    class Program
    {
        private static void DeleteOldFiles(string appPath)
        {
            foreach (string file in Directory.GetFiles(appPath))
            {
                if (Path.GetFileName(file) != "TeamsNetphoneLinkUpdater.exe" && Path.GetFileName(file) != "TeamsNetphoneLinkUpdater.dll")
                {
                    Console.WriteLine("Deleting file {0}", Path.GetFileName(file));
                    File.Delete(file);
                }
            }

            foreach (string dir in Directory.GetDirectories(appPath))
            {
                Directory.Delete(dir, true);
                Console.WriteLine("Deleting directory {0}", dir);
            }
        }

        private static void CopyNewFiles(string tempPath, string appPath)
        {
            foreach (string file in Directory.GetFiles(tempPath))
            {
                if (Path.GetFileName(file) != "TeamsNetphoneLinkUpdater.exe" && Path.GetFileName(file) != "TeamsNetphoneLinkUpdater.dll")
                {
                    string destFile = Path.Combine(appPath, Path.GetFileName(file));
                    Console.WriteLine("Copy file {0}", Path.GetFileName(file));
                    File.Copy(file, destFile, true);
                }
            }
        }

        private static void LaunchMainApp(string appPath)
        {
            Process.Start(new ProcessStartInfo
            {
                FileName = Path.Combine(appPath, "TeamsNetphoneLinkWPF.exe"),
                WorkingDirectory = appPath
            });
        }

        static void Main(string[] args)
        {
            if (args.Length < 2)
            {
                Console.WriteLine("Usage: TeamsNetphoneLinkUpdater <appPath> <tempPath>");
                Console.WriteLine($"Error during update: Args not satisfied!");
                Console.WriteLine("args.Length {0}", args.Length);
                for (int i = 0; i < args.Length; i++) {
                    Console.WriteLine("  args{0} --> {1}", i, args[i]);
                }
                Console.ReadLine();

                return;
            }

            string appPath = args[0];
            string tempPath = args[1];

            Console.WriteLine("Wait for Application exit...");
            while (Process.GetProcessesByName("TeamsNetphoneLinkWPF").Length != 0)
                Thread.Sleep(200);

            try
            {
                // Step 1: Delete old files
                DeleteOldFiles(appPath);

                // Step 2: Copy new files
                CopyNewFiles(tempPath, appPath);

                // Step 3: Launch the main app
                LaunchMainApp(appPath);

                // Step 4: Clean up
                Directory.Delete(tempPath, true);

                Console.WriteLine("Update done");

                Console.WriteLine("Exit in 10s");
                Thread.Sleep(1000*10);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error during update: {ex.Message}");
                Console.ReadLine();
            }
        }
    }
}