DaSaSo/DaSaSo.Wpf/App.xaml.cs

using DaSaSo.Domain.Model;
using DaSaSo.Domain.Services;
using DaSaSo.EntityFramework;
using DaSaSo.EntityFramework.Services;
using DaSaSo.ViewModel;
using DaSaSo.ViewModel.Factories;
using DaSaSo.ViewModel.Interface;
using DaSaSo.ViewModel.State.ActualState;
using DaSaSo.ViewModel.State.Navigation;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using System.Windows;

namespace DaSaSo.Wpf
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        private readonly IHost _host;
        public App()
        {
            _host = CreateHostBuilder().Build();
        }

        public static IHostBuilder CreateHostBuilder(string[]? args = null)
        {
            return Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration(c=>
                {
                    c.AddJsonFile("appsettings.json");
                    c.AddEnvironmentVariables();
                })
                .ConfigureServices((context, services) =>
                {

                    string connectionString = context.Configuration.GetConnectionString("default");
                    
                    services.AddSingleton<DaSaSoDbContextFactory>(new DaSaSoDbContextFactory(connectionString));
                    services.AddSingleton<IDataService<Client>, ClientDataService>();
                    services.AddSingleton<IDataService<Project>, ProjectDataService>();
                    services.AddSingleton<ClientListViewModel>();



                    services.AddSingleton<IViewModelAbstractFactory, ViewModelAbstractFactory>();
                    services.AddSingleton<CreateViewModel<ClientEditViewModel>>(services =>
                    {
                        return () => new ClientEditViewModel(
                             services.GetRequiredService<IDataService<Client>>(),
                             services.GetRequiredService<IActualProject>(),
                             new ViewModelDelegateRenavigator(
                                 services.GetRequiredService<INavigator>()
                             ));
                    });
                    services.AddSingleton<CreateViewModel<HomeViewModel>>(services =>
                    {
                        return () => new HomeViewModel();
                    });
                    services.AddSingleton<CreateViewModel<ClientListViewModel>>(services =>
                    {
                        return () => new ClientListViewModel(
                            services.GetRequiredService<IDataService<Client>>(),
                            services.GetRequiredService<IActualProject>(),
                            new ViewModelDelegateRenavigator(
                                services.GetRequiredService<INavigator>()
                            ));
                    });

                    services.AddSingleton<CreateViewModel<ProjectListViewModel>>(services =>
                    {
                        return () => new ProjectListViewModel(
                            services.GetRequiredService<IDataService<Project>>(),
                            services.GetRequiredService<IActualProject>(),
                            new ViewModelDelegateRenavigator(
                                services.GetRequiredService<INavigator>()));
                    });

                    //services.AddSingleton<INavigator, Navigator>();
                    services.AddScoped<IActualProject, ActualProject>();
                    services.AddScoped<INavigator, Navigator>();

                    services.AddScoped<MainWindowViewModel>();
                });
        }
        protected override void OnStartup(StartupEventArgs e)
        {
            Application.Current.DispatcherUnhandledException += Current_DispatcherUnhandledException;
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;


            _host.Start();
            
            MainWindow? window = new MainWindow() { DataContext = _host.Services.GetRequiredService<MainWindowViewModel>() };
            window.Show();
            base.OnStartup(e);
        }

        protected override  async void OnExit(ExitEventArgs e)
        {
            _host.StopAsync();
            _host.Dispose();
            base.OnExit(e);
        }

        private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            try
            {
                Exception ex = (Exception)e.ExceptionObject;
                string text = "An application error occured. Plrease contact the Administrator with the following information:\n\n";
                MessageBox.Show(text + " " + ex.Message + "\n\n" + ex.StackTrace);
            }
            catch(Exception ex2)
            {
                MessageBox.Show("Fatal Non-UI error", ex2.Message, MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        private void Current_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
        {
            throw new NotImplementedException();
        }

    }
}