using System;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Options;
using StellaOps.AdvisoryAI.Abstractions;
using StellaOps.AdvisoryAI.Providers;
using StellaOps.AdvisoryAI.Retrievers;

namespace StellaOps.AdvisoryAI.DependencyInjection;

public static class SbomContextServiceCollectionExtensions
{
    public static IServiceCollection AddSbomContext(this IServiceCollection services, Action<SbomContextClientOptions>? configure = null)
    {
        ArgumentNullException.ThrowIfNull(services);

        var optionsBuilder = services.AddOptions<SbomContextClientOptions>();
        if (configure is not null)
        {
            optionsBuilder.Configure(configure);
        }

        services.AddHttpClient<ISbomContextClient, SbomContextHttpClient>((serviceProvider, client) =>
        {
            var options = serviceProvider.GetRequiredService<IOptions<SbomContextClientOptions>>().Value;
            if (options.BaseAddress is not null)
            {
                client.BaseAddress = options.BaseAddress;
            }

            if (!string.IsNullOrWhiteSpace(options.Tenant) && !string.IsNullOrWhiteSpace(options.TenantHeaderName))
            {
                client.DefaultRequestHeaders.Remove(options.TenantHeaderName);
                client.DefaultRequestHeaders.Add(options.TenantHeaderName, options.Tenant);
            }
        });

        services.TryAddSingleton<ISbomContextRetriever, SbomContextRetriever>();
        return services;
    }
}