/* -*-  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 "ns3/simulator.h"

#include "ns3/callback.h"

#include "ns3/ptr.h"

#include "ns3/node.h"

#include "ns3/onoff-application.h"

#include "ns3/mobility-helper.h"

#include "ns3/wifi-helper.h"

#include "ns3/node-container.h"

#include "ns3/random-variable.h"

#include "ns3/packet-socket-address.h"

#include "ns3/packet.h"

#include "ns3/node-list.h"

#include "ns3/ssid.h"

#include "ns3/wifi-phy.h"

#include "ns3/mobility-model.h"

#include "ns3/config.h"

#include "ns3/string.h"

#include "ns3/wifi-channel.h"

#include "ns3/boolean.h"

#include <iostream>

using namespace ns3;

void

WifiNetDeviceTrace (Ptr<const Packet> p, Mac48Address address)

{

  std::cout << " ad=" << address << " p: " << p << std::endl;

}

void

WifiPhyStateTrace (Time start, Time duration, enum WifiPhy::State state)

{

  std::cout << " state=";

  switch (state) {

  case WifiPhy::TX:

    std::cout << "tx      ";

    break;

  case WifiPhy::SYNC:

    std::cout << "sync    ";

    break;

  case WifiPhy::CCA_BUSY:

    std::cout << "cca-busy";

    break;

  case WifiPhy::IDLE:

    std::cout << "idle    ";

    break;

  }

  std::cout << " start="<<start<<" duration="<<duration<<std::endl;

}

static void

SetPosition (Ptr<Node> node, Vector position)

{

  Ptr<MobilityModel> mobility = node->GetObject<MobilityModel> ();

  mobility->SetPosition (position);

}

static Vector

GetPosition (Ptr<Node> node)

{

  Ptr<MobilityModel> mobility = node->GetObject<MobilityModel> ();

  return mobility->GetPosition ();

}

static void 

AdvancePosition (Ptr<Node> node) 

{

  Vector pos = GetPosition (node);

  pos.x += 5.0;

  if (pos.x >= 210.0) 

    {

      return;

    }

  SetPosition (node, pos);

  //std::cout << "x="<<pos.x << std::endl;

  Simulator::Schedule (Seconds (1.0), &AdvancePosition, node);

}

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

{

  Packet::EnableMetadata ();

  // enable rts cts all the time.

  Config::SetDefault ("WifiRemoteStationManager::RtsCtsThreshold", String ("0"));

  // disable fragmentation

  Config::SetDefault ("WifiRemoteStationManager::FragmentationThreshold", String ("2200"));

  WifiHelper wifi;

  MobilityHelper mobility;

  NodeContainer stas;

  NodeContainer ap;

  NetDeviceContainer staDevs;

  stas.Create (2);

  ap.Create (1);

  Ptr<WifiChannel> channel = CreateObject<WifiChannel> ();

  Ssid ssid = Ssid ("wifi-default");

  wifi.SetPhy ("WifiPhy");

  wifi.SetRemoteStationManager ("ArfWifiManager");

  // setup ap.

  wifi.SetMac ("NqstaWifiMac", "Ssid", ssid,

               "ActiveProbing", Boolean (false));

  staDevs = wifi.Build (stas, channel);

  // setup stas.

  wifi.SetMac ("NqapWifiMac", "Ssid", ssid,

               "BeaconGeneration", Boolean (true),

               "BeaconInterval", Seconds (2.5));

  wifi.Build (ap, channel);

  // mobility.

  mobility.Layout (stas.Begin (), stas.End ());

  mobility.Layout (ap.Begin (), ap.End ());

  Simulator::Schedule (Seconds (1.0), &AdvancePosition, ap.Get (0));

  PacketSocketAddress destination = PacketSocketAddress ();

  destination.SetProtocol (1);

  destination.SetSingleDevice (0);

  destination.SetPhysicalAddress (staDevs.Get(1)->GetAddress ());

  Ptr<Application> app = 

  stas.Get (0)->AddApplication (app);

  app->Start (Seconds (0.5));

  app->Stop (Seconds (43.0));

  Simulator::StopAt (Seconds (44.0));

  //NodeList::ConnectWithoutContext ("/nodes/*/devices/*/*", MakeCallback (&WifiNetDeviceTrace));

  //NodeList::ConnectWithoutContext ("/nodes/*/devices/*/phy/state", MakeCallback (&WifiPhyStateTrace));

  Simulator::Run ();

  Simulator::Destroy ();

  return 0;

}