/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2011 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: Ilya Moiseenko <iliamo@cs.ucla.edu>
 */


#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/NDNabstraction-module.h"
#include "ns3/point-to-point-grid.h"
#include "ns3/ipv4-global-routing-helper.h"
#include "ns3/random-variable.h"
#include "ns3/internet-module.h"
#include "ns3/applications-module.h"
#include "ns3/config-store.h"

#include <boost/lexical_cast.hpp>
#include <boost/foreach.hpp>

using namespace ns3;
using namespace std;
using namespace boost;

NS_LOG_COMPONENT_DEFINE ("Scenario");

// void PrintTime ()
// {
//   cout << "Progress: " << Simulator::Now ().ToDouble (Time::S) << "s" << endl;

//   Simulator::Schedule (Seconds (1.0), PrintTime);
// }

#include "base-experiment.h"

class Experiment
{
public:
  AnnotatedTopologyReader *reader;
  string prefix;

  Experiment ()
    : reader (0)
    , prefix ("simple/")
  { }
  
  void
  ConfigureTopology ()
  {
    Names::Clear ();
    cout << "Configure Topology\n";
    if (reader != 0) delete reader;
    reader = new AnnotatedTopologyReader (prefix);
    
    string input ("./src/NDNabstraction/examples/congestion-zoom.txt");
  
    reader->SetFileName (input);
    reader->Read ();
  }
  
  void InstallCcnxStackImpl ()
  {
    InternetStackHelper stack;
    Ipv4GlobalRoutingHelper ipv4RoutingHelper ("ns3::Ipv4GlobalRoutingOrderedNexthops");
    stack.SetRoutingHelper (ipv4RoutingHelper);
    stack.Install (reader->GetNodes ());

    reader->AssignIpv4Addresses (Ipv4Address ("10.0.0.0"));
    
    // Install CCNx stack
    cout << "Installing CCNx stack\n";
    CcnxStackHelper ccnxHelper;
    ccnxHelper.SetForwardingStrategy ("ns3::CcnxBestRouteStrategy");
    ccnxHelper.EnableLimits (true, Seconds(0.1));
    ccnxHelper.SetDefaultRoutes (false);
    ccnxHelper.InstallAll ();

    reader->ApplyOspfMetric ();
  }
  
  void InstallCcnxStack (bool installFIBs = true)
  {
    InstallCcnxStackImpl ();

    CcnxStackHelper ccnxHelper;
    ccnxHelper.InstallFakeGlobalRoutes ();
    if (installFIBs)
      {
        // // Populate FIB based on IPv4 global routing controller
        ccnxHelper.InstallRoutesToAll ();
      }
  }
  
  void InstallIpStack ()
  {
    InternetStackHelper stack;
    stack.Install (reader->GetNodes ());
    reader->AssignIpv4Addresses (Ipv4Address ("10.0.0.0"));
    reader->ApplyOspfMetric ();

    Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
  }

  ApplicationContainer
  AddCcnxApplications ()
  {
    ApplicationContainer apps;

    Ptr<Node> client = Names::Find<Node> (prefix, lexical_cast<string> ("client"));
    Ptr<Node> server = Names::Find<Node> (prefix, lexical_cast<string> ("server"));
    
    CcnxAppHelper consumerHelper ("ns3::CcnxConsumerWindow");
    consumerHelper.SetPrefix ("/" + lexical_cast<string> (server->GetId ()));
    consumerHelper.SetAttribute ("Size", StringValue ("2.0"));

    CcnxAppHelper producerHelper ("ns3::CcnxProducer");
    producerHelper.SetPrefix ("/" + lexical_cast<string> (server->GetId ()));
    
    apps.Add
      (consumerHelper.Install (client));

    apps.Add
      (producerHelper.Install (server));

    return apps;
  }

  ApplicationContainer
  AddTcpApplications ()
  {
    ApplicationContainer apps;

    Ptr<Node> client = Names::Find<Node> (prefix, lexical_cast<string> ("client"));
    Ptr<Node> server = Names::Find<Node> (prefix, lexical_cast<string> ("server"));

    Ptr<Ipv4> ipv4 = client->GetObject<Ipv4> ();

    // to make sure we don't reuse the same port numbers for different flows, just make all port numbers unique
    PacketSinkHelper consumerHelper ("ns3::TcpSocketFactory",
                                     InetSocketAddress (Ipv4Address::GetAny (), 1024));

    BulkSendHelper producerHelper ("ns3::TcpSocketFactory",
                                   InetSocketAddress (ipv4->GetAddress (1, 0).GetLocal (), 1024));
    // cout << "SendTo: " <<  ipv4->GetAddress (1, 0).GetLocal () << endl;
    producerHelper.SetAttribute ("MaxBytes", UintegerValue (2081040)); // equal to 2001 ccnx packets

    apps.Add
      (consumerHelper.Install (client));

    apps.Add
      (producerHelper.Install (server));
    
    // uint32_t streamId = 0;
    // const static uint32_t base_port = 10;
    // for (list<tuple<uint32_t,uint32_t> >::iterator i = m_pairs.begin (); i != m_pairs.end (); i++)
    //   {
    //     uint32_t node1_num = i->get<0> ();
    //     uint32_t node2_num = i->get<1> ();

    //     Ptr<Node> node1 = Names::Find<Node> ("/sprint", lexical_cast<string> (node2_num));
    //     Ptr<Node> node2 = Names::Find<Node> ("/sprint", lexical_cast<string> (node1_num));

    //     Ptr<Ipv4> ipv4 = node1->GetObject<Ipv4> ();
    //     // ipv4->GetAddress (0, 0);

    //     // to make sure we don't reuse the same port numbers for different flows, just make all port numbers unique
    //     PacketSinkHelper consumerHelper ("ns3::TcpSocketFactory",
    //                                      InetSocketAddress (Ipv4Address::GetAny (), base_port + streamId));

    //     BulkSendHelper producerHelper ("ns3::TcpSocketFactory",
    //                                    InetSocketAddress (ipv4->GetAddress (1, 0).GetLocal (), base_port + streamId));
    //     // cout << "SendTo: " <<  ipv4->GetAddress (1, 0).GetLocal () << endl;
    //     producerHelper.SetAttribute ("MaxBytes", UintegerValue (2081040)); // equal to 2001 ccnx packets
        
    //     apps.Add
    //       (consumerHelper.Install (node1));

    //     apps.Add
    //       (producerHelper.Install (node2));

    //     streamId++;
    //   }

    return apps;
  }

  void
  Run (const Time &finishTime)
  {
    cout << "Run Simulation.\n";
    Simulator::Stop (finishTime);
    Simulator::Schedule (Seconds (5.0), PrintTime);
    Simulator::Run ();
    Simulator::Destroy ();
    cout << "Done.\n";
  }
};


int 
main (int argc, char *argv[])
{
  cout << "Begin congestion-pop scenario\n";
  
  Config::SetDefault ("ns3::PointToPointNetDevice::DataRate", StringValue ("1Mbps"));
  // Config::SetDefault ("ns3::DropTailQueue::MaxPackets", StringValue ("60"));
  Config::SetDefault ("ns3::TcpSocket::SegmentSize", StringValue ("1040"));
  
  Config::SetDefault ("ns3::BulkSendApplication::SendSize", StringValue ("1040"));

  Config::SetDefault ("ns3::ConfigStore::Filename", StringValue ("attributes.xml"));
  Config::SetDefault ("ns3::ConfigStore::Mode", StringValue ("Save"));
  Config::SetDefault ("ns3::ConfigStore::FileFormat", StringValue ("Xml"));
  
  CommandLine cmd;
  cmd.Parse (argc, argv);

  // ConfigStore config;
  // config.ConfigureDefaults ();
  
  Experiment experiment;
  string prefix = "congestion-zoom-";

  cout << "NDN experiment\n";
  // NDN
  {
    experiment.ConfigureTopology ();
    experiment.InstallCcnxStack ();
    experiment.AddCcnxApplications ();

    // for (uint32_t i = 0; i < apps.GetN () / 2; i++) 
    //   {
    //     apps.Get (i*2)->SetStartTime (Seconds (1+i));
    //     apps.Get (i*2 + 1)->SetStartTime (Seconds (1+i));
    //   }

    CcnxTraceHelper traceHelper;
    traceHelper.EnableRateL3All (prefix + "rate-trace.log");
    // traceHelper.EnableSeqsAppAll ("ns3::CcnxConsumerCbr", prefix + "consumers-seqs.log");
    // traceHelper.EnableSeqsAppAll ("ns3::CcnxConsumerWindow", prefix + "consumers-seqs.log");
    // traceHelper.EnableWindowsAll (prefix + "windows.log");

    // config.ConfigureAttributes ();
    experiment.Run (Seconds (50.0));
    // experiment.reader->SavePositions ("pos.log");
  }

  cout << "TCP experiment\n";
  // TCP
  {
    experiment.ConfigureTopology ();
    experiment.InstallIpStack ();
    experiment.AddTcpApplications ();

    CcnxTraceHelper traceHelper;
    traceHelper.EnableIpv4RateL3All (prefix + "ipv4-rate-trace.log");
    // traceHelper.EnableIpv4SeqsAppAll (prefix + "tcp-consumers-seqs.log");
    // traceHelper.EnableWindowsTcpAll (prefix + "tcp-windows.log");

    // for (uint32_t i = 0; i < apps.GetN () / 2; i++) 
    //   {
    //     apps.Get (i*2)->SetStartTime (Seconds (1+i));

    //     apps.Get (i*2 + 1)->SetStartTime (Seconds (1+i));

    //     // cout << "Node: " << apps.Get (i*2 + 1)->GetNode ()->GetId () << "\n";
    //     // care only about BulkSender
    //     Simulator::Schedule (Seconds (1+i+0.01),
    //                          &CcnxTraceHelper::TcpConnect, &traceHelper, apps.Get (i*2)->GetNode ());

    //     Simulator::Schedule (Seconds (1+i+0.01),
    //                          &CcnxTraceHelper::TcpConnect, &traceHelper, apps.Get (i*2 + 1)->GetNode ());
    //   }

    experiment.Run (Seconds (50.0));
  }

  return 0;
}