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.DependencyInjection;
using System;
using System.Windows;

namespace DaSaSo.Wpf
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            Application.Current.DispatcherUnhandledException += Current_DispatcherUnhandledException;
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
            IServiceProvider serviceProvider = CreateServiceProvider();
            
            MainWindow? window = new MainWindow() { DataContext = serviceProvider.GetRequiredService<MainWindowViewModel>() };
            window.Show();
            base.OnStartup(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();
        }

        private IServiceProvider CreateServiceProvider()
        {
            IServiceCollection services = new ServiceCollection();

            services.AddSingleton<DaSaSoDbContextFactory>();
            services.AddSingleton<IDataService<Client>, ClientDataService>();
            services.AddSingleton<ClientListViewModel>();
            
            

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

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

            services.AddScoped<MainWindowViewModel>();
            

            return services.BuildServiceProvider();
        }
    }
}