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

/*

 * Copyright (c) 2010 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

 *

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

 */

#include <iostream>

#include "ns3/simulator.h"

#include "ns3/nstime.h"

#include "ns3/command-line.h"

#include "ns3/double.h"

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

/**

 * \file

 * \ingroup simulator

 * Example program demonstrating use of various Schedule functions.

 */

using namespace ns3;

/** Simple model object to illustrate event handling. */

class MyModel

{

public:

  /** Start model execution by scheduling a HandleEvent. */

  void Start (void);

private:

  /**

   *  Simple event handler.

   *

   * \param [in] eventValue Event argument.

   */

  void HandleEvent (double eventValue);

};

void

MyModel::Start (void)

{

  Simulator::Schedule (Seconds (10.0),

                       &MyModel::HandleEvent,

                       this, Simulator::Now ().GetSeconds ());

}

void

MyModel::HandleEvent (double value)

{

  std::cout << "Member method received event at "

            << Simulator::Now ().GetSeconds ()

            << "s started at " << value << "s" << std::endl;

}

/**

 * Simple function event handler which Starts a MyModel object.

 *

 * \param [in] model The MyModel object to start.

 */

static void

ExampleFunction (MyModel *model)

{

  std::cout << "ExampleFunction received event at "

            << Simulator::Now ().GetSeconds () << "s" << std::endl;

  model->Start ();

}

/**

 * Simple function event handler; this function is called randomly.

 */

static void

RandomFunction (void)

{

  std::cout << "RandomFunction received event at "

            << Simulator::Now ().GetSeconds () << "s" << std::endl;

}

/** Simple function event handler; the corresponding event is cancelled. */

static void

CancelledEvent (void)

{

  std::cout << "I should never be called... " << std::endl;

}

int main (int argc, char *argv[])

{

  CommandLine cmd;

  cmd.Parse (argc, argv);

  MyModel model;

  Ptr<UniformRandomVariable> v = CreateObject<UniformRandomVariable> ();

  v->SetAttribute ("Min", DoubleValue (10));

  v->SetAttribute ("Max", DoubleValue (20));

  Simulator::Schedule (Seconds (10.0), &ExampleFunction, &model);

  Simulator::Schedule (Seconds (v->GetValue ()), &RandomFunction);

  EventId id = Simulator::Schedule (Seconds (30.0), &CancelledEvent);

  Simulator::Cancel (id);

  Simulator::Run ();

  Simulator::Destroy ();

}