using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Options;
using MSearch.Domain;

namespace MSearch.SearchProviders.StackExchange;

public static class ServiceCollectionExtensions
{
    public static IServiceCollection AddStackExchangeSearchProvider(this IServiceCollection services, string site)
    {
        services
            .AddOptions<StackExchangeOptions>(site)
            .BindConfiguration("SearchProviders:StackExchange")
            .Configure(o => o.Site = site);
        services.TryAddTransient<IValidateOptions<StackExchangeOptions>, StackExchangeOptionsValidator>();

        services.AddHttpClient<ISearchProvider, StackExchangeSearchProvider>(
            nameof(StackExchangeSearchProvider),
            (httpClient, sp) =>
            {
                httpClient.BaseAddress = new("https://api.stackexchange.com/2.3/");

                return new StackExchangeSearchProvider(
                    Options.Create(sp.GetRequiredService<IOptionsMonitor<StackExchangeOptions>>().Get(site)),
                    httpClient
                );
            }
        );

        return services;
    }
}