/* -*-  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/default-value.h"

#include "ns3/random-variable-default-value.h"

#include "ns3/mobility-model.h"

namespace ns3 {

enum ModelType

{

  RANDOM,

  CONSTANT_SPEED

};

static EnumDefaultValue<enum ModelType> g_modelType

("PropagationDelayModelType",

 "The type of propagation delay model to use.",

 CONSTANT_SPEED, "ConstantSpeed",

 RANDOM, "Random",

 0, (void*)0);

static NumericDefaultValue<double> g_speed

("PropagationDelayConstantSpeed",

 "The speed (m/s) of propagation if a ConstantSpeed propagation delay model is used.",

 300000000.0);

static RandomVariableDefaultValue g_random

("PropagationDelayRandomDistribution", 

 "The delay distribution to use if a Random propagation delay model is used.",

 "Uniform:0:1.0");

PropagationDelayModel::~PropagationDelayModel ()

{}

Ptr<PropagationDelayModel> 

PropagationDelayModel::CreateDefault (void)

{

  switch (g_modelType.GetValue ()) {

  case CONSTANT_SPEED:

    return CreateObject<ConstantSpeedPropagationDelayModel> (g_speed.GetValue ());

    break;

  case RANDOM:

    return CreateObject<RandomPropagationDelayModel> ();

    break;

  default:

    NS_ASSERT (false);

    return 0;

    break;

  }

}

RandomPropagationDelayModel::RandomPropagationDelayModel ()

{}

RandomPropagationDelayModel::RandomPropagationDelayModel (const RandomVariable &variable)

{}

RandomPropagationDelayModel::~RandomPropagationDelayModel ()

Time 

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

{

}

ConstantSpeedPropagationDelayModel::ConstantSpeedPropagationDelayModel (double speed)

  : m_speed (speed)

{}

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