sms-task-two/src/Sms.TaskTwo.Avalonia/App.axaml.cs

using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Sms.Environment;
using Sms.Environment.Linux;
using Sms.Environment.Windows;
using Sms.TaskTwo.Avalonia.Views;
using Sms.TaskTwo.Core.DependencyInjection;
using Sms.TaskTwo.Core.Logging;
using Sms.TaskTwo.ViewModels;

namespace Sms.TaskTwo.Avalonia;

public partial class App : Application
{
    public static IServiceProvider Services { get; private set; } = null!;

    public override void Initialize()
    {
        AvaloniaXamlLoader.Load(this);
    }

    public override void OnFrameworkInitializationCompleted()
    {
        Services = ConfigureServices();

        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
        {
            var mainViewModel = Services.GetRequiredService<MainWindowViewModel>();
            desktop.MainWindow = new MainWindow(mainViewModel);
            desktop.ShutdownRequested += OnShutdownRequested;
        }

        base.OnFrameworkInitializationCompleted();
    }

    private static void OnShutdownRequested(object? sender, ShutdownRequestedEventArgs e)
    {
        if (Services.GetService<ConsoleLog>() is IDisposable log)
        {
            log.Dispose();
        }
    }

    private static IServiceProvider ConfigureServices()
    {
        var configuration = new ConfigurationBuilder()
            .SetBasePath(AppContext.BaseDirectory)
            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
            .Build();

        var services = new ServiceCollection();
        services.AddSingleton<IConfiguration>(configuration);
        services.AddSingleton<IEnvironmentVariableStore>(CreateEnvironmentStore);
        services.AddTaskTwoCore(configuration);
        services.AddSingleton<MainWindowViewModel>();

        return services.BuildServiceProvider();
    }

    private static IEnvironmentVariableStore CreateEnvironmentStore(IServiceProvider _) =>
        OperatingSystem.IsWindows()
            ? new WindowsEnvironmentVariableStore()
            : new LinuxEnvironmentVariableStore();
}