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

/*

 * 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: Josh Pelkey <jpelkey@gatech.edu>

 */

#include <iostream>

#include "ns3/core-module.h"

#include "ns3/simulator-module.h"

#include "ns3/node-module.h"

#include "ns3/helper-module.h"

using namespace ns3;

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

{

  Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (512));

  Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("500kb/s"));

  uint32_t xSize = 5;

  uint32_t ySize = 5;

  uint16_t port = 0;

  std::string animFile;

  CommandLine cmd;

  cmd.AddValue ("xSize", "Number of rows of nodes", xSize);

  cmd.AddValue ("ySize", "Number of columns of nodes", ySize);

  cmd.AddValue ("port",  "Port Number for Remote Animation", port);

  cmd.AddValue ("animFile",  "File Name for Animation Output", animFile);

  cmd.Parse (argc,argv);

  if (xSize < 1 || ySize < 1 || (xSize < 2 && ySize < 2))

    {

      NS_FATAL_ERROR ("Need more nodes for grid.");

    }

  PointToPointHelper pointToPoint;

  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));

  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));

  // Create Grid

  PointToPointGridHelper grid (xSize, ySize, pointToPoint);

  // Install stack on Grid

  InternetStackHelper stack;

  grid.InstallStack (stack);

  // Assign Addresses to Grid

  grid.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.1.0", "255.255.255.0"),

                            Ipv4AddressHelper ("10.2.1.0", "255.255.255.0"));

  OnOffHelper clientHelper ("ns3::UdpSocketFactory", Address ());

  clientHelper.SetAttribute 

    ("OnTime", RandomVariableValue (ConstantVariable (1)));

  clientHelper.SetAttribute 

    ("OffTime", RandomVariableValue (ConstantVariable (0)));

  ApplicationContainer clientApps;

  // Create an on/off app sending packets

  AddressValue remoteAddress (InetSocketAddress (grid.GetIpv4Address (xSize-1,ySize-1), 1000));

  clientHelper.SetAttribute ("Remote", remoteAddress);

  clientApps.Add (clientHelper.Install (grid.GetNode (0,0)));

  clientApps.Start (Seconds (0.0));

  clientApps.Stop (Seconds (1.5));

  // Set the bounding box for animation

  grid.BoundingBox (1, 1, 10, 10);

  // Create the animation object and configure for specified output

  AnimationInterface anim;

  if (port > 0)

    {

      anim.SetServerPort (port);

    }

  else if (!animFile.empty ())

    {

      anim.SetOutputFile (animFile);

    }

  anim.StartAnimation ();

  // Set up the actual simulation

  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  std::cout << "Running the simulation" << std::endl;

  Simulator::Run ();

  std::cout << "Destroying the simulation" << std::endl;

  Simulator::Destroy ();

  std::cout << "Stopping the animation" << std::endl;

  anim.StopAnimation();

  return 0;

}