// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
// All Rights Reserved.

using Wpf.Ui.Demo.Mvvm.Views;

namespace Wpf.Ui.Demo.Mvvm.Services;

/// <summary>
/// Managed host of the application.
/// </summary>
public class ApplicationHostService(IServiceProvider serviceProvider) : IHostedService
{
    private INavigationWindow? _navigationWindow;

    /// <summary>
    /// Triggered when the application host is ready to start the service.
    /// </summary>
    /// <param name="cancellationToken">Indicates that the start process has been aborted.</param>
    public async Task StartAsync(CancellationToken cancellationToken)
    {
        await HandleActivationAsync();
    }

    /// <summary>
    /// Triggered when the application host is performing a graceful shutdown.
    /// </summary>
    /// <param name="cancellationToken">Indicates that the shutdown process should no longer be graceful.</param>
    public async Task StopAsync(CancellationToken cancellationToken)
    {
        await Task.CompletedTask;
    }

    /// <summary>
    /// Creates main window during activation.
    /// </summary>
    private async Task HandleActivationAsync()
    {
        await Task.CompletedTask;

        if (!Application.Current.Windows.OfType<MainWindow>().Any())
        {
            _navigationWindow = (serviceProvider.GetService(typeof(INavigationWindow)) as INavigationWindow)!;
            _navigationWindow!.ShowWindow();

            _ = _navigationWindow.Navigate(typeof(Views.Pages.DashboardPage));
        }

        await Task.CompletedTask;
    }
}