using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using MultiTerm.Core.ViewModel;
using System.Windows;
using MultiTerm.Core.Helpers;
using Common.Logging;
using Common.Logger;

namespace MultiTerm.Wpf;

public partial class App : Application
{
    public static IHost? AppHost { get; private set; }

    public App()
    {
        // create dependency injection host
        AppHost = Host.CreateDefaultBuilder()
            .ConfigureServices((hostContext, services) =>
            {
                services.AddSingleton<MainWindow>();
                services.AddSingleton<ILogger>(new SerilogLogger("C:/log/multiterm-log-.txt", true));

                // viewmodels
                services.AddSingleton<ShellViewModel>();

                // application specific
                services.AddTerminalViewModelFactory();
            })
            .Build();
    }

    protected override async void OnStartup(StartupEventArgs e)
    {
        await AppHost!.StartAsync();

        // create logger and initialize
        var logger = AppHost.Services.GetRequiredService<ILogger>();
        logger.Initialize(LogLevel.Trace);
        logger.LogInfo("Application started.", nameof(App));

        // instanciate startup form and show
        var startupForm = AppHost.Services.GetRequiredService<MainWindow>();
        startupForm.Show();

        base.OnStartup(e);
    }

    protected override async void OnExit(ExitEventArgs e)
    {
        // log application exit and stop logger (if still available)
        var logger = AppHost!.Services.GetRequiredService<ILogger>();
        logger?.LogInfo("Application exited.", nameof(App));
        logger?.StopLogging();

        await AppHost!.StopAsync();
        base.OnExit(e);
    }

}