using DocumentService.Client.Clients;
using DocumentService.Client.Configuration;
using DocumentService.Client.Interfaces;
using Microsoft.Extensions.DependencyInjection;
using System.Net;
using System.Net.Http;

namespace DocumentService.Client.Extensions;

/// <summary>
/// Extension methods for registering DocumentService clients in DI container.
/// </summary>
public static class ServiceCollectionExtensions
{
    /// <summary>
    /// Registers all six DocumentService HTTP clients as Scoped via HttpClientFactory.
    /// </summary>
    /// <param name="services">Service collection</param>
    /// <param name="configureOptions">Configuration action for client options</param>
    /// <returns>Service collection for chaining</returns>
    public static IServiceCollection AddDocumentServiceClients(
        this IServiceCollection services,
        Action<DocumentServiceClientOptions> configureOptions)
    {
        services.Configure(configureOptions);

        var options = new DocumentServiceClientOptions();
        configureOptions(options);

        var configureHandler = () => new HttpClientHandler
        {
            AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
        };

        void ConfigureClient(System.Net.Http.HttpClient client)
        {
            client.BaseAddress = new Uri(options.BaseUrl);
            client.Timeout = options.Timeout;
        }

        services.AddHttpClient<IPdfValidationClient, PdfValidationClient>(ConfigureClient)
            .ConfigurePrimaryHttpMessageHandler(configureHandler);

        services.AddHttpClient<IPdfAttachmentClient, PdfAttachmentClient>(ConfigureClient)
            .ConfigurePrimaryHttpMessageHandler(configureHandler);

        services.AddHttpClient<IPdfOperationsClient, PdfOperationsClient>(ConfigureClient)
            .ConfigurePrimaryHttpMessageHandler(configureHandler);

        services.AddHttpClient<ISwissQrCodeClient, SwissQrCodeClient>(ConfigureClient)
            .ConfigurePrimaryHttpMessageHandler(configureHandler);

        services.AddHttpClient<IZugferdClient, ZugferdClient>(ConfigureClient)
            .ConfigurePrimaryHttpMessageHandler(configureHandler);

        // Conversion client is registered but all methods throw NotImplementedException
        // until the server-side endpoints are ready.
        services.AddHttpClient<IPdfConversionClient, PdfConversionClient>(ConfigureClient)
            .ConfigurePrimaryHttpMessageHandler(configureHandler);

        return services;
    }
}