using System;
using System.Web.Http;
using System.Web.Http.Description;

using Matrix42.Hosting.Contracts;

using C4IT.Logging;

using static C4IT.Logging.cLogManager;

namespace C4IT.F4SD
{
    public class F4SDM42DependencyRegistrator : IDependencyRegistrator
    {
        public void Register(IDependencyContainer container, IDependencyResolver resolver)
        {
            if (container == null)
                throw new ArgumentNullException(nameof(container));

            if (resolver == null)
                throw new ArgumentNullException(nameof(resolver));

            try
            {
                if (resolver.TryGet(typeof(IApiExplorer)) != null)
                    return;
            }
            catch
            {
                // Existing mapping is incomplete in the sandbox host. Register a concrete instance below.
            }

            var httpConfiguration = new HttpConfiguration();
            container.RegisterInstance(typeof(IApiExplorer), new ApiExplorer(httpConfiguration));
            LogEntry("Registered System.Web.Http.Description.IApiExplorer for Matrix42 sandbox host.", LogLevels.Debug);
        }
    }
}