/* -*- 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/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/netanim-module.h"
#include "ns3/applications-module.h"
#include "ns3/point-to-point-layout-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;
  std::string animFile = "grid-animation.xml";

  CommandLine cmd;
  cmd.AddValue ("xSize", "Number of rows of nodes", xSize);
  cmd.AddValue ("ySize", "Number of columns of nodes", ySize);
  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", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
  clientHelper.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=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, 100, 100);

  // Create the animation object and configure for specified output
  AnimationInterface anim (animFile);

  // Set up the actual simulation
  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  Simulator::Run ();
  Simulator::Destroy ();
  return 0;
}