using AvParser.Core.Collecting;
using AvParser.Core.Proxies;
using AvParser.Core.Settings;
using AvParser.Infrastructure.Proxies;
using AvParser.Infrastructure.Storage;
using AvParser.UI.Media;
using AvParser.UI.Navigation;
using AvParser.UI.Services;
using AvParser.UI.ViewModels;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Serilog.Core;

namespace AvParser.UI.DependencyInjection;

/// <summary>Composition root for the presentation layer.</summary>
public static class UiServiceCollectionExtensions
{
    /// <summary>Registers the view locator, shell services and every page.</summary>
    /// <remarks>
    /// Pages are registered twice on purpose: once under their concrete type (so tests and other
    /// pages can ask for one specifically) and once under <see cref="PageViewModel"/> in the order
    /// they should appear in the navigation rail.
    /// </remarks>
    public static IServiceCollection AddAvParserUI(this IServiceCollection services)
    {
        ArgumentNullException.ThrowIfNull(services);

        services.AddSingleton<ViewLocator>();
        services.AddSingleton<IThumbnailCache>(static sp => new ThumbnailCache(
            sp.GetRequiredService<IAppPaths>(),
            sp.GetRequiredService<ILogger<ThumbnailCache>>()
        ));
        services.AddSingleton<IFolderPicker, FolderPicker>();
        services.AddSingleton<IThemeService, ThemeService>();
        services.AddSingleton<ILocalizationService, LocalizationService>();
        services.AddSingleton<INavigationService, NavigationService>();

        services.AddSingleton<DashboardViewModel>(static sp => new DashboardViewModel(
            sp.GetRequiredService<IMediaSourceCatalog>(),
            sp.GetRequiredService<IAppPaths>(),
            sp.GetRequiredService<IProxyPool>(),
            sp
        ));
        services.AddSingleton<SettingsViewModel>(static sp => new SettingsViewModel(
            sp.GetRequiredService<ISettingsService>(),
            sp.GetRequiredService<IThemeService>(),
            sp.GetRequiredService<IAppPaths>(),
            sp.GetRequiredService<LoggingLevelSwitch>(),
            sp.GetRequiredService<IProxyPool>(),
            sp.GetRequiredService<ILocalizationService>(),
            sp.GetRequiredService<IFolderPicker>()
        ));
        services.AddSingleton<CollectViewModel>(static sp => new CollectViewModel(
            sp.GetRequiredService<IMediaSourceCatalog>(),
            sp.GetRequiredService<ISettingsService>(),
            sp.GetRequiredService<IProxyPool>(),
            sp.GetRequiredService<ICollectRunner>(),
            sp.GetRequiredService<IMediaStore>(),
            sp.GetRequiredService<IThumbnailCache>(),
            sp,
            sp.GetRequiredService<ILogger<CollectViewModel>>()
        ));
        services.AddSingleton<GalleryViewModel>(static sp => new GalleryViewModel(
            sp.GetRequiredService<IMediaStore>(),
            sp.GetRequiredService<IThumbnailCache>(),
            sp.GetRequiredService<ILogger<GalleryViewModel>>()
        ));
        services.AddSingleton<ProxiesViewModel>(static sp => new ProxiesViewModel(
            sp.GetRequiredService<IProxyPool>(),
            sp.GetRequiredService<IMutableProxySource>(),
            sp.GetRequiredService<IProxyPoolLoader>(),
            sp.GetRequiredService<ILogger<ProxiesViewModel>>()
        ));
        services.AddSingleton<AboutViewModel>();

        // Order here is the order of the navigation rail; the first entry is the landing page.
        services.AddSingleton<PageViewModel>(static sp => sp.GetRequiredService<DashboardViewModel>());
        services.AddSingleton<PageViewModel>(static sp => sp.GetRequiredService<CollectViewModel>());
        services.AddSingleton<PageViewModel>(static sp => sp.GetRequiredService<GalleryViewModel>());
        services.AddSingleton<PageViewModel>(static sp => sp.GetRequiredService<ProxiesViewModel>());
        services.AddSingleton<PageViewModel>(static sp => sp.GetRequiredService<SettingsViewModel>());
        services.AddSingleton<PageViewModel>(static sp => sp.GetRequiredService<AboutViewModel>());

        services.AddSingleton<ShellViewModel>(static sp => new ShellViewModel(
            sp.GetRequiredService<INavigationService>(),
            sp.GetRequiredService<IThemeService>()
        ));

        return services;
    }
}