using System;
using System.IO;
using System.Linq;
using System.Net;

namespace CMD_Tchat
{
    class Program
    {
        private string localDirectory;
        private string filePath;

        static void Main(string[] args)
        {
            var p = new Program();
            p.localDirectory = @"C:\ProgramData\cmd_tchat\";
            string date = (DateTime.Now.Day + "." + DateTime.Now.Month + "." + DateTime.Now.Year);

            try
            {
                if (!File.Exists(p.localDirectory + date + ".txt"))
                {
                    File.Create(p.localDirectory + date + ".txt");
                    return;
                } else
                {
                    p.filePath = (p.localDirectory + date + ".txt");
                }
            } catch (DirectoryNotFoundException)
            {
                Directory.CreateDirectory(@"C:\ProgramData\cmd_tchat\");
                return;
            }

            string ftpHost;
            string ftpFullPath;
            string user;
            string password;

            try
            {
                ftpHost = File.ReadAllLines(p.localDirectory + "ftp_settings")[2];
                ftpFullPath = "ftp://" + ftpHost + "/" + date + ".txt";
                user = File.ReadAllLines(p.localDirectory + "ftp_settings")[3];
                password = File.ReadAllLines(p.localDirectory + "ftp_settings")[4];

                if (user == "-")
                    user = "";
                else if (password == "-")
                    password = "";

            } catch (FileNotFoundException)
            {
                using (StreamWriter writer = new StreamWriter(p.localDirectory + "ftp_settings", true))
                {
                    writer.WriteLine("# Line 3: IP Adress ; Line 4: FTP Username ; Line 5: FTP Password");
                    writer.WriteLine("# Put a '-' if the value is null");
                    writer.WriteLine("127.0.0.1");
                    writer.WriteLine("spylx");
                    writer.WriteLine("-");
                    writer.Close();
                }
                return;
            } catch (IndexOutOfRangeException)
            {
                Console.WriteLine("Une valeur est vide dans " + p.localDirectory + "ftp_settings");
                Console.ReadKey();
                Environment.Exit(0);
                return;
            }

            using (WebClient request = new WebClient())
            {
                request.Credentials = new NetworkCredential(user, password);
                Console.WriteLine(user + password);
                byte[] fileData;
                try
                {
                    fileData = request.DownloadData(ftpFullPath);
                } catch (WebException)
                {
                    request.UploadFile(ftpFullPath, p.filePath);
                    return;
                }

                using (FileStream file = File.Create(p.filePath))
                {
                    file.Write(fileData, 0, fileData.Length);
                    file.Close();
                }
            }
        }
    }
}