using Marathon.Application.Storage;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using MudBlazor.Services;

namespace Marathon.UI.Services;

/// <summary>
/// DI registration helpers for the Marathon.UI Razor Class Library.
/// Hosts call <see cref="AddMarathonUi(IServiceCollection, IConfiguration, string)"/>
/// during startup.
/// </summary>
public static class UiServicesExtensions
{
    /// <summary>
    /// Registers MudBlazor services, localization, the theme/locale observable
    /// state objects, the file-backed settings writer, and binds all
    /// configuration sections that the Settings page surfaces.
    /// </summary>
    /// <param name="services">DI container.</param>
    /// <param name="configuration">Host configuration root.</param>
    /// <param name="settingsLocalPath">
    /// Absolute path to <c>appsettings.Local.json</c>, used by the writer.
    /// </param>
    public static IServiceCollection AddMarathonUi(
        this IServiceCollection services,
        IConfiguration configuration,
        string settingsLocalPath)
    {
        ArgumentNullException.ThrowIfNull(services);
        ArgumentNullException.ThrowIfNull(configuration);
        ArgumentException.ThrowIfNullOrEmpty(settingsLocalPath);

        services.AddMudServices();

        // No ResourcesPath: the SharedResource type already lives in the
        // Marathon.UI.Resources namespace, so its compiled .resources name
        // is "Marathon.UI.Resources.SharedResource.{culture}.resources" which
        // matches the type's FullName directly. Setting ResourcesPath="Resources"
        // here would cause the resolver to look for "...Resources.Resources..."
        // and silently fall back to displaying the keys.
        services.AddLocalization();

        // Strongly typed options bound to appsettings.json sections.
        services.Configure<LocalizationOptions>(configuration.GetSection(LocalizationOptions.SectionName));
        services.Configure<WorkerOptions>(configuration.GetSection(WorkerOptions.SectionName));
        services.Configure<AnomalyOptions>(configuration.GetSection(AnomalyOptions.SectionName));
        services.Configure<StorageOptions>(configuration.GetSection(StorageOptions.SectionName));
        services.Configure<ScrapingSettingsForm>(configuration.GetSection(ScrapingSettingsForm.SectionName));

        // Singletons that drive UI chrome state.
        services.AddSingleton<ThemeState>();
        services.AddSingleton<LocaleState>();
        services.AddSingleton<EventBrowsingState>();
        services.AddSingleton<AnomalyBrowsingState>();

        // Browsing facades — Scoped so they capture the per-circuit repository scope.
        services.AddScoped<IEventBrowsingService, EventBrowsingService>();
        services.AddScoped<IAnomalyBrowsingService, AnomalyBrowsingService>();
        services.AddScoped<IAnomalyInsightsService, AnomalyInsightsService>();
        services.AddScoped<IResultsBrowsingService, ResultsBrowsingService>();
        services.AddScoped<IBetJournalService, BetJournalService>();

        // Settings writer — file path is host-resolved.
        services.AddSingleton<ISettingsWriter>(_ => new JsonSettingsWriter(settingsLocalPath));

        return services;
    }
}