#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using HeuristicLab.Clients.Hive.SlaveCore.Properties;
using HeuristicLab.Clients.Hive.SlaveCore.ServiceContracts;

namespace HeuristicLab.Clients.Hive.SlaveCore {

  public enum ClientComType { Pipe, Trace };

  /// <summary>
  /// Singleton which encapsulates the SlaveCommunicationService
  /// </summary>
  public class SlaveClientCom {
    private static SlaveClientCom instance;
    //private static DuplexChannelFactory<ISlaveCommunication> pipeFactory;
    private static IClientCom clientComInstance;
    public ISlaveCommunication ClientCom { get; set; }

    /// <summary>
    /// Getter for the Instance of the SlaveClientCom
    /// </summary>
    /// <returns>the Instance of the SlaveClientCom class</returns>
    public static SlaveClientCom Instance {
      get {
        if (instance == null) {
          instance = new SlaveClientCom();
        }
        return instance;
      }
    }

    public static IClientCom ClientComInstance {
      get {
        if (clientComInstance != null) {
          return clientComInstance;
        }
        throw new NullReferenceException("No instance of SlaveClientCom<T>");
      }
    }

    public void LogMessage(string message) {
      try {
        ClientCom.LogMessage(message);
      }
      catch (Exception ex) {
        EventLogManager.LogMessage("Exception on LogMessage: " + ex.ToString() + Environment.NewLine + "Orginal message was: " + message);
      }
    }

    public void StatusChanged(StatusCommons status) {
      try {
        ClientCom.StatusChanged(status);
      }
      catch (Exception ex) {
        EventLogManager.LogMessage("Exception on StatusChanged: " + ex.ToString());
      }
    }

    private SlaveClientCom() {
      ClientComType type = Settings.Default.ClientComType;
      if (type == ClientComType.Pipe) {
        clientComInstance = new PipeCom();
      } else if (type == ClientComType.Trace) {
        clientComInstance = new TraceCom();
      } else {
        throw new InvalidStateException("Invalid client communication type");
      }

      ClientCom = clientComInstance.GetSlaveCom();
    }

    public static void Close() {
      ClientComInstance.Close();
    }
  }
}