///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.IO;
using System.Windows.Forms;
using log4net;

namespace UserManagement
{
	static class Program
	{
        static readonly ILog log;                               /// log4net

        public const string HomeDir = "C:\\UserManagement\\";	/// Contains subdirectories Cfg, Logs

        /// Program information
        public static string Version;			                /// version string
        public static DateTime BuildDateTime;	                /// date and time of program build

        /// Local settings
        public static readonly string ExecutableDirectory;
        public static readonly string ConfigDirectory;
        public static readonly string LogDirectory;
        public static readonly string LocalSettingsFileName;
        public static readonly string LocalSettingsBackupName;
        public static LocalSettings LocalSettings;

        /// <summary>
        /// Initializes static variables above and starts logging.
        /// </summary>
        static Program()
        {
            /// Program version string
            System.Reflection.Assembly thisAssembly = System.Reflection.Assembly.GetExecutingAssembly();
            Version ver = thisAssembly.GetName().Version;
            Version = string.Format("{0}.{1}.{2}", ver.Major, ver.Minor, ver.Build);
            BuildDateTime = new System.IO.FileInfo(thisAssembly.Location).LastWriteTime;

            /// Local program configuration directory including the trailing backslash
            ExecutableDirectory = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
            ConfigDirectory = Path.Combine(ExecutableDirectory, "..\\Cfg\\");
            LogDirectory = Path.Combine(ExecutableDirectory, "..\\Logs\\");
            LocalSettingsFileName = ConfigDirectory + "config.xml";
            LocalSettingsBackupName = ConfigDirectory + "config.backup.xml";

            /// Configue and start logging
            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(ConfigDirectory + "log4netConfig.xml"));
            log = LogManager.GetLogger(typeof(Program));
            log.Fatal("------------------------------------------------------------------------------------------------");
            log.Fatal("started");
        }


		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main()
		{
            /// This belongs to Application.Run(new MainWnd()) ...
            /// and should be executed before opening 'loginDlg'
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            bool authorized = false;
            do
            {
                ///
                /// Load the local settings
                ///
                Program.LocalSettings = LocalSettings.Load(Program.LocalSettingsFileName);
                if (Program.LocalSettings == null)
                {
                    /// Loading local seetings from regular config file failed. Use the backup
                    Program.LocalSettings = LocalSettings.Load(Program.LocalSettingsBackupName);
                    if (Program.LocalSettings == null)
                    {
                        MessageBox.Show("Na tomto počítači nebol tento program ani raz spustený." +
                                        Environment.NewLine + "Použijú sa základné nastavenia.",
                                        "Upozornenie", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        Program.LocalSettings = new LocalSettings();
                        Directory.CreateDirectory(ConfigDirectory);
                        Program.LocalSettings.Save();
                    }
                    else
                    {
                        LocalSettings.Save();	/// Save the settings to overwrite the wrong file
                    }
                }
                else
                {
                    /// Loading local seetings from the regular config file was successful. Update the backup
                    File.Copy(Program.LocalSettingsFileName, Program.LocalSettingsBackupName, true);
                }

                try
                {
					Users.DB.ConnectionString = Program.LocalSettings.ConnectionString;
					Users.DB.LoadSharedData();

                    authorized = true;      /// No LoginDlg, authorized when reading users from the DB is successfull
                }
                catch (Exception exc)
                {
                    MessageBox.Show(string.Format("Cannot read a list of users from the database:{0}{1}", Environment.NewLine, exc.Message),
                                    "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

                    if (new DatabaseSettingsDlg().ShowDialog() == DialogResult.Cancel) return;  /// 'OK' = stay in the loop, 'Cancel' = exit loop
                }
            }
            while (!authorized);


			try
			{
				string culture = LocalSettings.Language.Replace('_', '-');
				System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo(culture);
			}
			catch (Exception e)
			{
				string msg = e.Message;
				MessageBox.Show("Selected language not supported.\nUsing English.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
				System.Threading.Thread.CurrentThread.CurrentUICulture =
					new System.Globalization.CultureInfo("en");
			}


            try
            {
                Users.Forms.UserManagementDlg dlg = new Users.Forms.UserManagementDlg(Users.DB.CreateSession(), false);

                string connStr = LocalSettings.ConnectionString;
                int len = connStr.ToUpper().IndexOf("; UID=");
                dlg.TitleExtension = connStr.Substring(0, len);
                Application.Run(dlg);
            }
            catch (Exception exc)
            {
                log.FatalFormat("Program havaroval:{0}{1}Stack trace:{0}{2}", Environment.NewLine, exc.Message, exc.StackTrace);

                MessageBox.Show("Program havaroval:" +
                                Environment.NewLine + Environment.NewLine + exc.Message +
                                ((exc.InnerException == null) ? string.Empty : (Environment.NewLine + exc.InnerException.Message)) +
                                Environment.NewLine + exc.StackTrace,
                                "Pozor!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
		}
	}
}