// -----------------------------------------------------------------------------
// CertificateStatusServiceCollectionExtensions.cs
// Sprint: SPRINT_20260119_008 Certificate Status Provider
// Task: CSP-006 - DI Registration
// Description: DI registration for certificate status services.
// -----------------------------------------------------------------------------

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using StellaOps.Cryptography.CertificateStatus.Abstractions;

namespace StellaOps.Cryptography.CertificateStatus;

/// <summary>
/// Extension methods for registering certificate status services.
/// </summary>
public static class CertificateStatusServiceCollectionExtensions
{
    /// <summary>
    /// Adds certificate status provider services to the service collection.
    /// </summary>
    /// <param name="services">The service collection.</param>
    /// <returns>The service collection for chaining.</returns>
    public static IServiceCollection AddCertificateStatusProvider(this IServiceCollection services)
    {
        // Ensure HttpClient factory and memory cache are available
        services.AddHttpClient();
        services.AddMemoryCache();

        // Register components
        services.TryAddSingleton<OcspClient>();
        services.TryAddSingleton<CrlFetcher>();
        services.TryAddSingleton<ICertificateStatusProvider, CertificateStatusProvider>();

        return services;
    }

    /// <summary>
    /// Adds certificate status provider with custom HTTP client configuration.
    /// </summary>
    /// <param name="services">The service collection.</param>
    /// <param name="configureOcspClient">Action to configure the OCSP HTTP client.</param>
    /// <param name="configureCrlClient">Action to configure the CRL HTTP client.</param>
    /// <returns>The service collection for chaining.</returns>
    public static IServiceCollection AddCertificateStatusProvider(
        this IServiceCollection services,
        Action<IHttpClientBuilder>? configureOcspClient = null,
        Action<IHttpClientBuilder>? configureCrlClient = null)
    {
        var ocspBuilder = services.AddHttpClient("OCSP", client =>
        {
            client.Timeout = TimeSpan.FromSeconds(10);
            client.DefaultRequestHeaders.Accept.Add(
                new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/ocsp-response"));
        });
        configureOcspClient?.Invoke(ocspBuilder);

        var crlBuilder = services.AddHttpClient("CRL", client =>
        {
            client.Timeout = TimeSpan.FromSeconds(30);
        });
        configureCrlClient?.Invoke(crlBuilder);

        services.AddMemoryCache();

        services.TryAddSingleton<OcspClient>();
        services.TryAddSingleton<CrlFetcher>();
        services.TryAddSingleton<ICertificateStatusProvider, CertificateStatusProvider>();

        return services;
    }
}