/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2011, 2012 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * This program 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 this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Marco Miozzo  <marco.miozzo@cttc.es>

 *         Nicola Baldo <nbaldo@cttc.es>

 * 

 */

#ifndef BUILDINGS_PROPAGATION_LOSS_MODEL_H_

#define BUILDINGS_PROPAGATION_LOSS_MODEL_H_

#include "ns3/nstime.h"

#include "ns3/propagation-loss-model.h"

#include "ns3/random-variable-stream.h"

#include <ns3/building.h>

#include <ns3/buildings-mobility-model.h>

namespace ns3 {

class ShadowingLossModel;

class JakesFadingLossModel;

/**

 * \ingroup propagation

 *

 *  This model provides means for simulating the following propagation

 *  phenomena in the presence of buildings: 

 *

 *   - shadowing (indoor, outdoor)

 *   - external wall penetration loss

 *   - internal wall penetration loss

 *  

 *  The distance-dependent component of propagation loss is deferred

 *  to derived classes which are expected to implement the GetLoss method.

 *  

 *

 */

class BuildingsPropagationLossModel : public PropagationLossModel

{

public:

  static TypeId GetTypeId (void);

  BuildingsPropagationLossModel ();

  /**

   * \param a the mobility model of the source

   * \param b the mobility model of the destination

   * \returns the propagation loss (in dBm)

   */

  virtual double GetLoss (Ptr<MobilityModel> a, Ptr<MobilityModel> b) const = 0;

  // inherited from PropagationLossModel

  virtual double DoCalcRxPower (double txPowerDbm, Ptr<MobilityModel> a, Ptr<MobilityModel> b) const;

protected:

  double GetShadowing (Ptr<MobilityModel> a, Ptr<MobilityModel> b) const;

  double m_lossInternalWall; // in meters

  class ShadowingLoss

  {

  public:

    ShadowingLoss ();

    ShadowingLoss (double shadowingValue, Ptr<MobilityModel> receiver);

    double GetLoss () const;

    Ptr<MobilityModel> GetReceiver (void) const;

  protected:

    double m_shadowingValue;

    Ptr<MobilityModel> m_receiver;

  };

  mutable std::map<Ptr<MobilityModel>,  std::map<Ptr<MobilityModel>, ShadowingLoss> > m_shadowingLossMap;

  double m_shadowingSigmaExtWalls;

  double m_shadowingSigmaOutdoor;

  double m_shadowingSigmaIndoor;

  Ptr<NormalRandomVariable> m_randVariable;

  virtual int64_t DoAssignStreams (int64_t stream);

};

}

#endif /* BUILDINGS_PROPAGATION_LOSS_MODEL_H_ */