using System;
using System.ServiceModel;
using HeuristicLab.Hive.Contracts;
using HeuristicLab.Hive.Contracts.Interfaces;

namespace HeuristicLab.Hive.Server.ServerConsole {

  internal class ServiceLocator {
    private static IServerConsoleFacade serverConsoleFacade = null;

    internal static string Address { get; set; }
    internal static string Port { get; set; }
    internal static string Username { get; set; }
    internal static string Password { get; set; } // [chn] TODO: Don't store plaintext password in memory!

    internal static ISlaveManager GetSlaveManager() {
      return GetServerConsoleFacade() as ISlaveManager;
    }

    internal static IJobManager GetJobManager() {
      return GetServerConsoleFacade() as IJobManager;
    }

    internal static IServerConsoleFacade GetServerConsoleFacade() {
      if (serverConsoleFacade == null && Address != String.Empty && Port != String.Empty) {
        ChannelFactory<IServerConsoleFacade> factory = new ChannelFactory<IServerConsoleFacade>("ServerConsoleHttpEndpoint");
        WcfSettings.SetEndpointAddress(factory.Endpoint, Address);

        factory.Credentials.UserName.UserName = Username;
        factory.Credentials.UserName.Password = Password;

        IServerConsoleFacade client = factory.CreateChannel();

        ((ICommunicationObject)client).Faulted += ServiceLocator_Faulted;
        serverConsoleFacade = client;
      }
      return serverConsoleFacade;
    }

    static void ServiceLocator_Faulted(object sender, EventArgs e) {
      ((ICommunicationObject)serverConsoleFacade).Abort();
      ((ICommunicationObject)serverConsoleFacade).Faulted -= ServiceLocator_Faulted;
      serverConsoleFacade = null;
    }

    internal static void ShutDownFacade() {
      serverConsoleFacade = null;
    }
  }
}