using DigitalData.Auth.Abstractions;
using Microsoft.AspNetCore.SignalR.Client;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Options;

namespace DigitalData.Auth.Client;

public static class DIExtensions
{
    public static IServiceCollection AddAuthHubClient(this IServiceCollection services, IConfiguration? configuration = null, Action<ClientParams>? options = null)
    {
        var clientParams = configuration?.Get<ClientParams>() ?? new ClientParams();
        options?.Invoke(clientParams);
        services
            .AddSingleton(Options.Create(clientParams))
            .AddSingleton<IAuthClient, AuthClient>()
            .TryAddSingleton<HubConnectionBuilder>();

        services.AddHostedService(sp =>
        {
            var client = sp.GetRequiredService<IAuthClient>() as AuthClient;
            if (client is not null)
                return client;
            else throw new InvalidOperationException(
                "IAuthClient instance could not be resolved from the service provider. " +
                "This may indicate that the 'AddAuthHubClient' extension method was not called " +
                "or there was an issue with the dependency registration process."
            );
        });

        return services;
    }
}