namespace Common.Services.LaserImport
{
    using System;
    using System.Configuration;
    using System.IO;
    using System.Threading;

    class Program
    {
        static readonly KeyValueConfigurationCollection appsettings 
             = ConfigurationManager
                .OpenExeConfiguration(typeof(Program).Assembly.Location)
                .AppSettings
                .Settings;
        static readonly string sharedFolder = appsettings["SharedFolder"].Value;
        static readonly string localFolder = appsettings["LocalFolder"].Value;
        static readonly FileSystemWatcher serverWatcher = new FileSystemWatcher(sharedFolder);
        static readonly FileSystemWatcher clientWhatcher = new FileSystemWatcher(localFolder);
        static readonly ManualResetEventSlim awaiter = new ManualResetEventSlim();
        static string fileToDelete;

        static void Main()
        {
            serverWatcher.Created += ServerWatcher_FileCreated;
            serverWatcher.NotifyFilter = NotifyFilters.FileName;
            serverWatcher.IncludeSubdirectories = false;
            serverWatcher.EnableRaisingEvents = true;

            clientWhatcher.Deleted += CleintWatcher_FileDeleted;
            clientWhatcher.NotifyFilter = NotifyFilters.FileName;
            clientWhatcher.IncludeSubdirectories = false;
            clientWhatcher.EnableRaisingEvents = true;

            WaithLaserReady();
        }

        private static void WaithLaserReady()
        {
            var fg = ConsoleColor.DarkGray;
            Console.ForegroundColor = fg;

            while (true)
            {
                awaiter.Reset();
                awaiter.Wait();

                Console.ForegroundColor = ConsoleColor.White;
                Console.Write($"LASERUNG BESTÄTIGEN");
                Console.ReadLine();
                Console.ForegroundColor = fg;

                while (File.Exists(fileToDelete))
                {
                    try
                    {
                        File.Delete(fileToDelete);
                        Console.WriteLine($"{fileToDelete} - deleted");

                        break;
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e.Message);
                        Thread.Sleep(100);
                    }
                }

                Console.Clear();
            }
        }

        /// <summary>
        /// Occures when file deleted on laser PC
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="args"></param>
        private static void CleintWatcher_FileDeleted(object _, FileSystemEventArgs args)
        {
            fileToDelete = Path.Combine(sharedFolder, args.Name);

            if (!File.Exists(fileToDelete))
            {
                Console.WriteLine($"{fileToDelete} - dose not exists!");

                fileToDelete = string.Empty;
            }
            else
            {
                awaiter.Set();
            }
        }

        /// <summary>
        /// Occures when file created from the laserkennzeichnung
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="args"></param>
        private static void ServerWatcher_FileCreated(object _, FileSystemEventArgs args)
        {
            var sourceFilePath = args.FullPath;
            var destinationFilePath = Path.Combine(localFolder, args.Name);

            Thread.Sleep(1000);

            if (File.Exists(sourceFilePath))
            {
                while (true)
                {
                    try
                    {
                        File.Copy(sourceFilePath, destinationFilePath, true);

                        break;
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e.Message);
                        Thread.Sleep(100);
                    }
                }

                Console.WriteLine($"{sourceFilePath} copied to {destinationFilePath}");
            }
            else
            {
                Console.WriteLine($"{sourceFilePath} - dose not exists!");
            }
        }
    }
}