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

/*

 * Copyright (c) 2005,2006,2007 INRIA

 *

 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "propagation-delay-model.h"

#include "ns3/random-variable.h"

#include "ns3/mobility-model.h"

#include "ns3/double.h"

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (PropagationDelayModel);

TypeId 

PropagationDelayModel::GetTypeId (void)

{

  static TypeId tid = TypeId ("ns3::PropagationDelayModel")

    .SetParent<Object> ()

    ;

  return tid;

}

PropagationDelayModel::~PropagationDelayModel ()

{}

NS_OBJECT_ENSURE_REGISTERED (RandomPropagationDelayModel);

TypeId 

RandomPropagationDelayModel::GetTypeId (void)

{

  static TypeId tid = TypeId ("ns3::RandomPropagationDelayModel")

    .SetParent<PropagationDelayModel> ()

    .AddConstructor<RandomPropagationDelayModel> ()

    .AddAttribute ("Variable",

                   "The random variable which generates random delays (s).",

                   RandomVariableValue (UniformVariable (0.0, 1.0)),

                   MakeRandomVariableAccessor (&RandomPropagationDelayModel::m_variable),

                   MakeRandomVariableChecker ())

    ;

  return tid;

}

RandomPropagationDelayModel::RandomPropagationDelayModel ()

{}

RandomPropagationDelayModel::~RandomPropagationDelayModel ()

{}

Time 

RandomPropagationDelayModel::GetDelay (Ptr<MobilityModel> a, Ptr<MobilityModel> b) const

{

  return Seconds (m_variable.GetValue ());

}

NS_OBJECT_ENSURE_REGISTERED (ConstantSpeedPropagationDelayModel);

TypeId

ConstantSpeedPropagationDelayModel::GetTypeId (void)

{

  static TypeId tid = TypeId ("ns3::ConstantSpeedPropagationDelayModel")

    .SetParent<PropagationDelayModel> ()

    .AddConstructor<ConstantSpeedPropagationDelayModel> ()

    .AddAttribute ("Speed", "The speed (m/s)",

                   DoubleValue (300000000.0),

                   MakeDoubleAccessor (&ConstantSpeedPropagationDelayModel::m_speed),

                   MakeDoubleChecker<double> ())

    ;

  return tid;

}

ConstantSpeedPropagationDelayModel::ConstantSpeedPropagationDelayModel ()

{}

Time 

ConstantSpeedPropagationDelayModel::GetDelay (Ptr<MobilityModel> a, Ptr<MobilityModel> b) const

{

  double distance = a->GetDistanceFrom (b);

  double seconds = distance / m_speed;

  return Seconds (seconds);

}

void 

ConstantSpeedPropagationDelayModel::SetSpeed (double speed)

{

  m_speed = speed;

}

double 

ConstantSpeedPropagationDelayModel::GetSpeed (void) const

{

  return m_speed;

}

} // namespace ns3