/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2011-2012 University of California, Los Angeles
 *
 * 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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 */

// ndn-congestion-topo-plugin.cc

#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/ndnSIM-module.h"

namespace ns3 {

/**
 * This scenario simulates a grid topology (using topology reader module)
 *
 *   /------\                                                    /------\
 *   | Src1 |<--+                                            +-->| Dst1 |
 *   \------/    \                                          /    \------/
 *                \                                        /
 *                 +-->/------\   "bottleneck"  /------\<-+
 *                     | Rtr1 |<===============>| Rtr2 |
 *                 +-->\------/                 \------/<-+
 *                /                                        \
 *   /------\    /                                          \    /------\
 *   | Src2 |<--+                                            +-->| Dst2 |
 *   \------/                                                    \------/
 *
 * To run scenario and see what is happening, use the following command:
 *
 *     NS_LOG=ndn.Consumer:ndn.Producer ./waf --run=ndn-congestion-topo-plugin
 */

int
main(int argc, char* argv[])
{
  CommandLine cmd;
  cmd.Parse(argc, argv);

  AnnotatedTopologyReader topologyReader("", 25);
  topologyReader.SetFileName("src/ndnSIM/examples/topologies/topo-6-node.txt");
  topologyReader.Read();

  // Install NDN stack on all nodes
  ndn::StackHelper ndnHelper;
  ndnHelper.SetContentStoreChoice(false);
  ndnHelper.SetContentStore("ns3::ndn::cs::Lru", "MaxSize", "10000");
  ndnHelper.InstallAll();

  // Choosing forwarding strategy
  ndn::StrategyChoiceHelper::InstallAll("/prefix", "/localhost/nfd/strategy/best-route");

  // Installing global routing interface on all nodes
  ndn::GlobalRoutingHelper ndnGlobalRoutingHelper;
  ndnGlobalRoutingHelper.InstallAll();

  // Getting containers for the consumer/producer
  Ptr<Node> consumer1 = Names::Find<Node>("Src1");
  Ptr<Node> consumer2 = Names::Find<Node>("Src2");

  Ptr<Node> producer1 = Names::Find<Node>("Dst1");
  Ptr<Node> producer2 = Names::Find<Node>("Dst2");

  ndn::AppHelper consumerHelper("ns3::ndn::ConsumerCbr");
  consumerHelper.SetAttribute("Frequency", StringValue("100")); // 100 interests a second

  // on the first consumer node install a Consumer application
  // that will express interests in /dst1 namespace
  consumerHelper.SetPrefix("/dst1");
  consumerHelper.Install(consumer1);

  // on the second consumer node install a Consumer application
  // that will express interests in /dst2 namespace
  consumerHelper.SetPrefix("/dst2");
  consumerHelper.Install(consumer2);

  ndn::AppHelper producerHelper("ns3::ndn::Producer");
  producerHelper.SetAttribute("PayloadSize", StringValue("1024"));

  // Register /dst1 prefix with global routing controller and
  // install producer that will satisfy Interests in /dst1 namespace
  ndnGlobalRoutingHelper.AddOrigins("/dst1", producer1);
  producerHelper.SetPrefix("/dst1");
  producerHelper.Install(producer1);

  // Register /dst2 prefix with global routing controller and
  // install producer that will satisfy Interests in /dst2 namespace
  ndnGlobalRoutingHelper.AddOrigins("/dst2", producer2);
  producerHelper.SetPrefix("/dst2");
  producerHelper.Install(producer2);

  // Calculate and install FIBs
  ndn::GlobalRoutingHelper::CalculateRoutes();

  Simulator::Stop(Seconds(20.0));

  Simulator::Run();
  Simulator::Destroy();

  return 0;
}


} // namespace ns3

int
main(int argc, char* argv[])
{
  return ns3::main(argc, argv);
}