#include "ns3/default-value.h"

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

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");

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");

Ptr<PropagationDelayModel> 

PropagationDelayModel::CreateDefault (void)

{

  switch (g_modelType.GetValue ()) {

  case CONSTANT_SPEED:

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

    break;

  case RANDOM:

    return Create<RandomPropagationDelayModel> ();

    break;

  default:

    NS_ASSERT (false);

    return 0;

    break;

  }

}

RandomPropagationDelayModel::RandomPropagationDelayModel ()

  : m_variable (g_random.GetCopy ())

{}