using Grpc.Core.Interceptors;
using Microsoft.Extensions.Configuration;
using MxGateway.Server.Configuration;

namespace MxGateway.Server.Security.Authorization;

public static class GrpcAuthorizationServiceCollectionExtensions
{
    public static IServiceCollection AddGatewayGrpcAuthorization(this IServiceCollection services)
    {
        services.AddSingleton<GatewayGrpcScopeResolver>();
        services.AddSingleton<IGatewayRequestIdentityAccessor, GatewayRequestIdentityAccessor>();
        services.AddSingleton<IConstraintEnforcer, ConstraintEnforcer>();
        services.AddSingleton<GatewayGrpcAuthorizationInterceptor>();
        services
            .AddOptions<global::Grpc.AspNetCore.Server.GrpcServiceOptions>()
            .Configure<IConfiguration>((grpcOptions, configuration) =>
            {
                ProtocolOptions protocolOptions = new();
                configuration.GetSection("MxGateway:Protocol").Bind(protocolOptions);
                grpcOptions.MaxReceiveMessageSize = protocolOptions.MaxGrpcMessageBytes;
                grpcOptions.MaxSendMessageSize = protocolOptions.MaxGrpcMessageBytes;
            });
        services.AddGrpc(options => options.Interceptors.Add<GatewayGrpcAuthorizationInterceptor>());

        return services;
    }
}