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using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using Tango.Core.Helpers;
using Tango.BL.Entities;
using Tango.Logging;
using Tango.MachineStudio.UI.Windows;
using Tango.Settings;
using Tango.MachineStudio.Common.EventLogging;
using Tango.BL.Enumerations;
using Tango.Core.DI;

namespace Tango.MachineStudio.UI
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        private WpfGlobalExceptionTrapper exceptionTrapper;
        private LogManager LogManager = LogManager.Default;

        protected override void OnStartup(StartupEventArgs e)
        {
            LogManager.RegisterLogger(new VSOutputLogger());
            LogManager.RegisterLogger(new FileLogger());

            LogManager.Log("Application Started...");

            base.OnStartup(e);

            LogManager.Categories.Clear();

            if (SettingsManager.Default.MachineStudio.LoggingCategories.Count == 0)
            {
                SettingsManager.Default.MachineStudio.LoggingCategories.Add(LogCategory.Critical);
                SettingsManager.Default.MachineStudio.LoggingCategories.Add(LogCategory.Error);
                SettingsManager.Default.MachineStudio.LoggingCategories.Add(LogCategory.Info);
                SettingsManager.Default.MachineStudio.LoggingCategories.Add(LogCategory.Warning);
            }

            LogManager.Categories.AddRange(SettingsManager.Default.MachineStudio.LoggingCategories);

            exceptionTrapper = new WpfGlobalExceptionTrapper();
            exceptionTrapper.Initialize(this);
            exceptionTrapper.ApplicationCrashed += ExceptionTrapper_ApplicationCrashed;
        }

        #region Global Exception Trapping

        /// <summary>
        /// Handles the ApplicationCrashed event of the ExceptionTrapper.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="ApplicationCrashedEventArgs"/> instance containing the event data.</param>
        private void ExceptionTrapper_ApplicationCrashed(object sender, ApplicationCrashedEventArgs e)
        {
            try
            {
                if (Application.Current == null)
                {
                    new Application { ShutdownMode = ShutdownMode.OnExplicitShutdown };
                }
            }
            catch { }

            try
            {
                var eventLogger = TangoIOC.Default.GetInstance<IEventLogger>();
                if (eventLogger != null)
                {
                    eventLogger.Log(e.Exception, "Application Crashed!");
                }
            }
            catch { }

            Application.Current.Dispatcher.Invoke(() =>
            {
                ExceptionWindow exWin = new ExceptionWindow(e.Exception);
                exWin.ShowDialog();

                switch (exWin.Resolution)
                {
                    case ExceptionResolutions.Ignore:
                        e.TryRecover = true;
                        break;
                    case ExceptionResolutions.Restart:
                        e.TryRecover = false;
                        LogManager.Log("User selection was to restart the application. Restarting...");
                        Process.Start(Application.ResourceAssembly.Location);
                        Environment.Exit(0);
                        break;
                    case ExceptionResolutions.Shutdown:
                        e.TryRecover = false;
                        LogManager.Log("User selection was to shutdown the application. Restarting...");
                        Environment.Exit(0);
                        break;
                }
            });
        }

        #endregion
    }
}