/* -*-  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/wifi-net-device.h"

#include "ns3/wifi-channel.h"

#include "ns3/wifi-phy.h"

#include "ns3/simulator.h"

#include "ns3/callback.h"

#include "ns3/ptr.h"

#include "ns3/node.h"

#include "ns3/onoff-application.h"

#include "ns3/static-mobility-model.h"

#include "ns3/random-variable.h"

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

#include "ns3/packet.h"

#include "ns3/node-list.h"

#include <iostream>

using namespace ns3;

void

{

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

}

void

WifiPhyStateTrace (const TraceContext &context, Time start, Time duration, enum WifiPhy::State state)

{

  std::cout << context << " 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 Ptr<Node>

CreateApNode (Ptr<WifiChannel> channel,

              Vector position, 

              const char *macAddress,

              Ssid ssid, 

              Time at)

{

  Ptr<Node> node = Create<Node> ();  

  Ptr<NqapWifiNetDevice> device = Create<NqapWifiNetDevice> (node, Mac48Address (macAddress));

  device->SetSsid (ssid);

  Simulator::Schedule (at, &NqapWifiNetDevice::StartBeaconing, device);

  device->ConnectTo (channel);

  Ptr<MobilityModel> mobility = Create<StaticMobilityModel> ();

  mobility->SetPosition (position);

  node->AddInterface (mobility);

  return node;

}

static Ptr<Node>

CreateStaNode (Ptr<WifiChannel> channel,

               Vector position, 

               const char *macAddress,

               Ssid ssid)

{

  Ptr<Node> node = Create<Node> ();  

  Ptr<NqstaWifiNetDevice> device = Create<NqstaWifiNetDevice> (node, Mac48Address (macAddress));

  Simulator::ScheduleNow (&NqstaWifiNetDevice::StartActiveAssociation, device, 

                          ssid);

  device->ConnectTo (channel);

  Ptr<MobilityModel> mobility = Create<StaticMobilityModel> ();

  mobility->SetPosition (position);

  node->AddInterface (mobility);

  return node;

}

static void

SetPosition (Ptr<Node> node, Vector position)

{

  Ptr<MobilityModel> mobility = node->QueryInterface<MobilityModel> (MobilityModel::iid);

  mobility->SetPosition (position);

}

static Vector

GetPosition (Ptr<Node> node)

{

  Ptr<MobilityModel> mobility = node->QueryInterface<MobilityModel> (MobilityModel::iid);

  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[])

{

  Simulator::SetLinkedList ();

  Packet::EnableMetadata ();

  //Simulator::EnableLogTo ("80211.log");

  // enable rts cts all the time.

  DefaultValue::Bind ("WifiRtsCtsThreshold", "0");

  // disable fragmentation

  DefaultValue::Bind ("WifiFragmentationThreshold", "2200");

  DefaultValue::Bind ("WifiRateControlAlgorithm", "Aarf");

  //DefaultValue::Bind ("WifiRateControlAlgorithm", "Arf");

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

  Ssid ssid = Ssid ("mathieu");

  Ptr<Node> a = CreateApNode (channel, 

                              Vector (5.0,0.0,0.0),

                              "00:00:00:00:00:01",

                              ssid, 

                              Seconds (0.1));

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

  Ptr<Node> b = CreateStaNode (channel,

                               Vector (0.0, 0.0, 0.0),

                               "00:00:00:00:00:02",

                               ssid);

  Ptr<Node> c = CreateStaNode (channel,

                               Vector (0.0, 0.0, 0.0),

                               "00:00:00:00:00:03",

                               ssid);

  PacketSocketAddress destination = PacketSocketAddress ();

  destination.SetProtocol (1);

  destination.SetSingleDevice (0);

  destination.SetPhysicalAddress (Mac48Address ("00:00:00:00:00:03"));

  Ptr<Application> app = Create<OnOffApplication> (b, destination, 

                                                   "Packet", 

                                                   ConstantVariable (42),

                                                   ConstantVariable (0));

  app->Start (Seconds (0.5));

  app->Stop (Seconds (43.0));

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

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

  Simulator::Run ();

  Simulator::Destroy ();

  return 0;

}