#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/mobility-module.h"
#include "ns3/lte-module.h"
#include "ns3/lte-module.h"
#include "ns3/flow-monitor-module.h"
#include "ns3/applications-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/config-store-module.h"
#include "ns3/netanim-module.h"
#include "ns3/gnuplot.h"
#include <math.h>

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("lte_handover_scenario_manual_handover");

void
NotifyConnectionEstablishedUe (std::string context,
                               uint64_t imsi,			//IMSI -> International Mobile Subscriber Identity
                               uint16_t cellid,
                               uint16_t rnti)			//RNTI -> Radio Network Temporary Identifier
{
  std::cout << Simulator::Now ().GetSeconds () << " " << context
            << " UE IMSI " << imsi
            << ": connected to CellId " << cellid
            << " with RNTI " << rnti
            << std::endl;
}

void
NotifyHandoverStartUe (std::string context,
                       uint64_t imsi,
                       uint16_t cellid,
                       uint16_t rnti,
                       uint16_t targetCellId)
{
  std::cout << Simulator::Now ().GetSeconds () << " " << context
            << " UE IMSI " << imsi
            << ": previously connected to CellId " << cellid
            << " with RNTI " << rnti
            << ", doing handover to CellId " << targetCellId
            << std::endl;
}

void
NotifyHandoverEndOkUe (std::string context,
                       uint64_t imsi,
                       uint16_t cellid,
                       uint16_t rnti)
{
  std::cout << Simulator::Now ().GetSeconds () << " " << context
            << " UE IMSI " << imsi
            << ": successful handover to CellId " << cellid
            << " with RNTI " << rnti
            << std::endl;
}

void
NotifyConnectionEstablishedEnb (std::string context,
                                uint64_t imsi,
                                uint16_t cellid,
                                uint16_t rnti)
{
  std::cout << Simulator::Now ().GetSeconds () << " " << context
            << " eNB CellId " << cellid
            << ": successful connection of UE with IMSI " << imsi
            << " RNTI " << rnti
            << std::endl;
}

void
NotifyHandoverStartEnb (std::string context,
                        uint64_t imsi,
                        uint16_t cellid,
                        uint16_t rnti,
                        uint16_t targetCellId)
{
  std::cout << Simulator::Now ().GetSeconds () << " " << context
            << " eNB CellId " << cellid
            << ": start handover of UE with IMSI " << imsi
            << " RNTI " << rnti
            << " to CellId " << targetCellId
            << std::endl;
}

void
NotifyHandoverEndOkEnb (std::string context,
                        uint64_t imsi,
                        uint16_t cellid,
                        uint16_t rnti)
{
  std::cout << Simulator::Now ().GetSeconds () << " " << context
            << " eNB CellId " << cellid
            << ": completed handover of UE with IMSI " << imsi
            << " RNTI " << rnti
            << std::endl;
}

void ThroughputMonitor (FlowMonitorHelper *fmhelper, Ptr<FlowMonitor> flowMon,Gnuplot2dDataset DataSet)
  {
    double localThrou=0;
    std::map<FlowId, FlowMonitor::FlowStats> flowStats = flowMon->GetFlowStats();
    Ptr<Ipv4FlowClassifier> classing = DynamicCast<Ipv4FlowClassifier> (fmhelper->GetClassifier());
    for (std::map<FlowId, FlowMonitor::FlowStats>::const_iterator stats = flowStats.begin (); stats != flowStats.end (); ++stats)
    {
      Ipv4FlowClassifier::FiveTuple fiveTuple = classing->FindFlow (stats->first);
       if (fiveTuple.sourceAddress == Ipv4Address("1.0.0.2") /*|| fiveTuple.sourceAddress == Ipv4Address("7.0.0.2") || fiveTuple.sourceAddress == Ipv4Address("7.0.0.3")*/)
      {

      std::cout<<"Flow ID     : " << stats->first <<" ; "<< fiveTuple.sourceAddress <<" -----> "<<fiveTuple.destinationAddress<<std::endl;
      std::cout<<"Tx Packets : " << stats->second.txPackets<<std::endl;
      std::cout<<"Rx Packets : " << stats->second.rxPackets<<std::endl;
      std::cout<<"Duration    : "<<(stats->second.timeLastRxPacket.GetSeconds()-stats->second.timeFirstTxPacket.GetSeconds())<<std::endl;
      std::cout<<"Last Received Packet  : "<< stats->second.timeLastRxPacket.GetSeconds()<<" Seconds"<<std::endl;
      std::cout<<"Throughput: " << stats->second.rxBytes * 8.0 / (stats->second.timeLastRxPacket.GetSeconds()-stats->second.timeFirstTxPacket.GetSeconds())/1024  << " Kbps"<<std::endl;
      std::cout<< "Mean{Delay}: " << (stats->second.delaySum.GetSeconds()/stats->second.rxPackets) << "\n";
      std::cout<< "Mean{Jitter}: " << (stats->second.jitterSum.GetSeconds()/(stats->second.rxPackets)) << "\n";
      std::cout<< "Total{Delay}: " << (stats->second.delaySum.GetSeconds()) << "\n";
      std::cout<< "Total{Jitter}: " << (stats->second.jitterSum.GetSeconds()) << "\n";
      std::cout<< "Lost Packets: " << (stats->second.lostPackets) << "\n";
      std::cout<< "Dropped Packets: " << (stats->second.packetsDropped.size()) << "\n";
      localThrou=(stats->second.rxBytes * 8.0 / (stats->second.timeLastRxPacket.GetSeconds()-stats->second.timeFirstTxPacket.GetSeconds())/1024);
      // updata gnuplot data
            DataSet.Add((double)Simulator::Now().GetSeconds(),(double) localThrou);
      std::cout<<"---------------------------------------------------------------------------"<<std::endl;
      }
    }
      Simulator::Schedule(Seconds(0.2  ),&ThroughputMonitor, fmhelper, flowMon,DataSet);
   //if(flowToXml)
      {
  flowMon->SerializeToXmlFile ("ThroughputMonitor.xml", true, true);
      }

  }


/**
 * Sample simulation script for a X2-based handover.
 * It instantiates two eNodeB, attaches one UE to the 'source' eNB and
 * triggers a handover of the UE towards the 'target' eNB.
 */
int
main (int argc, char *argv[])
{
  uint16_t numberOfUes = 20;
  uint16_t numberOfEnbs = 1;
  //uint16_t numBearersPerUe = 2;
  double simTime = 1.0;
  //double distance = 100.0;

  // change some default attributes so that they are reasonable for
  // this scenario, but do this before processing command line
  // arguments, so that the user is allowed to override these settings
  Config::SetDefault ("ns3::UdpClient::Interval", TimeValue (MilliSeconds (20)));
  Config::SetDefault ("ns3::UdpClient::MaxPackets", UintegerValue (1000000));
  Config::SetDefault ("ns3::LteEnbRrc::SrsPeriodicity", UintegerValue(320));
  Config::SetDefault ("ns3::LteHelper::UseIdealRrc", BooleanValue (false));

  // Command line arguments
  CommandLine cmd;
  cmd.AddValue ("numberOfUes", "Number of UEs", numberOfUes);
  cmd.AddValue ("numberOfEnbs", "Number of eNodeBs", numberOfEnbs);
  cmd.AddValue ("simTime", "Total duration of the simulation (in seconds)", simTime);
  cmd.Parse (argc, argv);


  Ptr<LteHelper> lteHelper = CreateObject<LteHelper> ();
  Ptr<PointToPointEpcHelper> epcHelper = CreateObject<PointToPointEpcHelper> ();
  lteHelper->SetEpcHelper (epcHelper);
  lteHelper->SetSchedulerType ("ns3::RrFfMacScheduler");
  lteHelper->SetHandoverAlgorithmType ("ns3::NoOpHandoverAlgorithm"); // disable automatic handover

  Ptr<Node> pgw = epcHelper->GetPgwNode ();

  // Create a single RemoteHost
  NodeContainer remoteHostContainer;
  remoteHostContainer.Create (1);
  Ptr<Node> remoteHost = remoteHostContainer.Get (0);
  InternetStackHelper internet;
  internet.Install (remoteHostContainer);

  // Create the Internet
  PointToPointHelper p2ph;
  p2ph.SetDeviceAttribute ("DataRate", DataRateValue (DataRate ("100Gb/s")));
  p2ph.SetDeviceAttribute ("Mtu", UintegerValue (1500));
  p2ph.SetChannelAttribute ("Delay", TimeValue (Seconds (0.010)));
  NetDeviceContainer internetDevices = p2ph.Install (pgw, remoteHost);
  Ipv4AddressHelper ipv4h;
  ipv4h.SetBase ("1.0.0.0", "255.0.0.0");
  Ipv4InterfaceContainer internetIpIfaces = ipv4h.Assign (internetDevices);
  Ipv4Address remoteHostAddr = internetIpIfaces.GetAddress (1);


  // Routing of the Internet Host (towards the LTE network)
  Ipv4StaticRoutingHelper ipv4RoutingHelper;
  Ptr<Ipv4StaticRouting> remoteHostStaticRouting = ipv4RoutingHelper.GetStaticRouting (remoteHost->GetObject<Ipv4> ());
  // interface 0 is localhost, 1 is the p2p device
  remoteHostStaticRouting->AddNetworkRouteTo (Ipv4Address ("7.0.0.0"), Ipv4Mask ("255.0.0.0"), 1);

  NodeContainer ueNodes;
  NodeContainer enbNodes;
  enbNodes.Create (numberOfEnbs);
  ueNodes.Create (numberOfUes);

  // Install Mobility Model
  // Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
  // for (uint16_t i = 0; i < numberOfEnbs; i++)
  //   {
  //     positionAlloc->Add (Vector (distance * 2 * i - distance, 0, 0));
  //   }
  // for (uint16_t i = 0; i < numberOfUes; i++)
  //   {
  //     positionAlloc->Add (Vector (0, 0, 0));
  //   }
  MobilityHelper mobility;
  /*mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
                                 "MinX", DoubleValue (10.0),
                                 "MinY", DoubleValue (10.0),
                                 "DeltaX", DoubleValue (12.0),
                                 "DeltaY", DoubleValue (10.0),
                                 "GridWidth", UintegerValue (5),
                                 "LayoutType", StringValue ("RowFirst"));
  mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel",
                             "Bounds", RectangleValue (Rectangle (-500, 500, -250, 500)));*/
  mobility.Install (ueNodes);
  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
  mobility.Install (enbNodes);



  // Install LTE Devices in eNB and UEs
  NetDeviceContainer enbLteDevs = lteHelper->InstallEnbDevice (enbNodes);
  NetDeviceContainer ueLteDevs = lteHelper->InstallUeDevice (ueNodes);

  // Install the IP stack on the UEs
  internet.Install (ueNodes);
  Ipv4InterfaceContainer ueIpIfaces;
  ueIpIfaces = epcHelper->AssignUeIpv4Address (NetDeviceContainer (ueLteDevs));


  // Attach all UEs to the first eNodeB
  // for (uint16_t i = 0; i < numberOfUes; i++)
  //   {
  //     lteHelper->Attach (ueLteDevs.Get (i), enbLteDevs.Get (0));
  //   }

  lteHelper->AttachToClosestEnb (ueLteDevs, enbLteDevs);


  NS_LOG_LOGIC ("setting up applications");

  // Install and start applications on UEs and remote host
  uint16_t dlPort = 10000;
  uint16_t ulPort = 20000;

  // randomize a bit start times to avoid simulation artifacts
  // (e.g., buffer overflows due to packet transmissions happening
  // exactly at the same time)
  Ptr<UniformRandomVariable> startTimeSeconds = CreateObject<UniformRandomVariable> ();
  startTimeSeconds->SetAttribute ("Min", DoubleValue (0));
  startTimeSeconds->SetAttribute ("Max", DoubleValue (0.010));


  for (uint32_t u = 0; u < numberOfUes; ++u)
    {
      Ptr<Node> ue = ueNodes.Get (u);
      // Set the default gateway for the UE
      Ptr<Ipv4StaticRouting> ueStaticRouting = ipv4RoutingHelper.GetStaticRouting (ue->GetObject<Ipv4> ());
      ueStaticRouting->SetDefaultRoute (epcHelper->GetUeDefaultGatewayAddress (), 1);

      //for (uint32_t b = 0; b < numBearersPerUe; ++b)
        {
          ++dlPort;
          ++ulPort;

          ApplicationContainer clientApps;
          ApplicationContainer serverApps;

          NS_LOG_LOGIC ("installing UDP DL app for UE " << u);
          UdpClientHelper dlClientHelper (ueIpIfaces.GetAddress (u), dlPort);
          clientApps.Add (dlClientHelper.Install (remoteHost));
          PacketSinkHelper dlPacketSinkHelper ("ns3::UdpSocketFactory",
                                               InetSocketAddress (Ipv4Address::GetAny (), dlPort));
          serverApps.Add (dlPacketSinkHelper.Install (ue));

          NS_LOG_LOGIC ("installing UDP UL app for UE " << u);
          UdpClientHelper ulClientHelper (remoteHostAddr, ulPort);
          clientApps.Add (ulClientHelper.Install (ue));
          PacketSinkHelper ulPacketSinkHelper ("ns3::UdpSocketFactory",
                                               InetSocketAddress (Ipv4Address::GetAny (), ulPort));
          serverApps.Add (ulPacketSinkHelper.Install (remoteHost));

          Ptr<EpcTft> tft = Create<EpcTft> ();
          EpcTft::PacketFilter dlpf;
          dlpf.localPortStart = dlPort;
          dlpf.localPortEnd = dlPort;
          tft->Add (dlpf);
          EpcTft::PacketFilter ulpf;
          ulpf.remotePortStart = ulPort;
          ulpf.remotePortEnd = ulPort;
          tft->Add (ulpf);
          EpsBearer bearer (EpsBearer::GBR_CONV_VOICE);
          lteHelper->ActivateDedicatedEpsBearer (ueLteDevs.Get (u), bearer, tft);

          Time startTime = Seconds (startTimeSeconds->GetValue ());
          serverApps.Start (startTime);
          clientApps.Start (startTime);

        }
    }


  // Add X2 inteface
    lteHelper->AddX2Interface (enbNodes);

  lteHelper->EnablePhyTraces ();
  lteHelper->EnableMacTraces ();
  lteHelper->EnableRlcTraces ();
  lteHelper->EnablePdcpTraces ();
   Ptr<RadioBearerStatsCalculator> rlcStats = lteHelper->GetRlcStats ();
   rlcStats->SetAttribute ("EpochDuration", TimeValue (Seconds (0.02)));
  Ptr<RadioBearerStatsCalculator> pdcpStats = lteHelper->GetPdcpStats ();
  pdcpStats->SetAttribute ("EpochDuration", TimeValue (Seconds (0.02)));

   //pointToPoint.EnablePcapAll ("blabla");


  // connect custom trace sinks for RRC connection establishment and handover notification
  Config::Connect ("/NodeList/*/DeviceList/*/LteEnbRrc/ConnectionEstablished",
                   MakeCallback (&NotifyConnectionEstablishedEnb));
  Config::Connect ("/NodeList/*/DeviceList/*/LteUeRrc/ConnectionEstablished",
                   MakeCallback (&NotifyConnectionEstablishedUe));
  Config::Connect ("/NodeList/*/DeviceList/*/LteEnbRrc/HandoverStart",
                   MakeCallback (&NotifyHandoverStartEnb));
  Config::Connect ("/NodeList/*/DeviceList/*/LteUeRrc/HandoverStart",
                   MakeCallback (&NotifyHandoverStartUe));
  Config::Connect ("/NodeList/*/DeviceList/*/LteEnbRrc/HandoverEndOk",
                   MakeCallback (&NotifyHandoverEndOkEnb));
  Config::Connect ("/NodeList/*/DeviceList/*/LteUeRrc/HandoverEndOk",
                   MakeCallback (&NotifyHandoverEndOkUe));


  Simulator::Stop (Seconds (simTime));
  AnimationInterface anim ("ltealaa.xml");
  anim.SetBackgroundImage("/home/alaa/repos/ns-3-allinone/ns-3-dev/scratch/map.png",-1,1,1,1,1);
  //anim.EnablePacketMetadata ();
  anim.SetMaxPktsPerTraceFile (100000000000);
  anim.SetMobilityPollInterval(Seconds(1));
  //anim.EnablePacketMetadata(true);
    std::string fileNameWithNoExtension = "FlowVSThroughput_";
    std::string graphicsFileName        = fileNameWithNoExtension + ".png";
    std::string plotFileName            = fileNameWithNoExtension + ".plt";
    std::string plotTitle               = "Flow vs Throughput";
    std::string dataTitle               = "Throughput";

    // Instantiate the plot and set its title.
    Gnuplot gnuplot (graphicsFileName);
    gnuplot.SetTitle (plotTitle);

    // Make the graphics file, which the plot file will be when it
    // is used with Gnuplot, be a PNG file.
    gnuplot.SetTerminal ("png");

    // Set the labels for each axis.
    gnuplot.SetLegend ("Flow", "Throughput");


   Gnuplot2dDataset dataset;
   dataset.SetTitle (dataTitle);
   dataset.SetStyle (Gnuplot2dDataset::LINES_POINTS);

  //flowMonitor declaration
  FlowMonitorHelper fmHelper;
  Ptr<FlowMonitor> allMon = fmHelper.InstallAll();
  allMon->CheckForLostPackets ();
  // call the flow monitor function
  ThroughputMonitor(&fmHelper, allMon, dataset);

  Simulator::Run ();

  //Gnuplot ...continued
  gnuplot.AddDataset (dataset);
  // Open the plot file.
  std::ofstream plotFile (plotFileName.c_str());
  // Write the plot file.
  gnuplot.GenerateOutput (plotFile);
  // Close the plot file.
  plotFile.close ();

  // GtkConfigStore config;
  // config.ConfigureAttributes ();

  Simulator::Destroy ();
  return 0;
}