/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2013 Trinity College of Dublin, Ireland
 *
 *
 * Author: Andriana Ioannou <ioannoa@scss.tcd.ie>
 */

#include "ndn-producer-tracer.h"//~
#include "ns3/node.h"
#include "ns3/packet.h"
#include "ns3/config.h"
#include "ns3/names.h"
#include "ns3/callback.h"

#include "ns3/ndn-app.h"
#include "ns3/ndn-interest.h"
#include "ns3/ndn-content-object.h"
#include "ns3/simulator.h"
#include "ns3/node-list.h"
#include "ns3/log.h"

#include <boost/lexical_cast.hpp>
#include <boost/make_shared.hpp>//(+)

#include <fstream>

NS_LOG_COMPONENT_DEFINE ("ndn.ProducerTracer");//~

using namespace std;

namespace ns3 {
namespace ndn {


boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<ProducerTracer> > >//~
ProducerTracer::InstallAll (const std::string &file, Time averagingPeriod) /* = Seconds (0.5)*/ //~
{
  using namespace boost;
  using namespace std;
  
  std::list<Ptr<ProducerTracer> > tracers;//~
  boost::shared_ptr<std::ofstream> outputStream (new std::ofstream ());
  
  outputStream->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);

  if (!outputStream->is_open ())
    return boost::make_tuple (outputStream, tracers);

  for (NodeList::Iterator node = NodeList::Begin ();
       node != NodeList::End ();
       node++)
    {
      NS_LOG_DEBUG ("Node: " << (*node)->GetId ());

      Ptr<ProducerTracer> trace = Create<ProducerTracer> (outputStream, *node);//~
      trace->SetAveragingPeriod (averagingPeriod);
      tracers.push_back (trace);
    }

  if (tracers.size () > 0)
    {
      // *m_l3RateTrace << "# "; // not necessary for R's read.table
      tracers.front ()->PrintHeader (*outputStream);
      *outputStream << "\n";
    }

  return boost::make_tuple (outputStream, tracers);
}

//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

ProducerTracer::ProducerTracer (boost::shared_ptr<std::ostream> os, Ptr<Node> node)
: m_nodePtr (node)
, m_os (os)
{
  m_node = boost::lexical_cast<string> (m_nodePtr->GetId ());

  Connect ();

  string name = Names::FindName (node);
  if (!name.empty ())
    {
      m_node = name;
    }
}

ProducerTracer::ProducerTracer (boost::shared_ptr<std::ostream> os, const std::string &node)
: m_node (node)
, m_os (os)
{
  Connect ();
}

ProducerTracer::~ProducerTracer ()
{
};


void
ProducerTracer::Connect ()
{
  Config::ConnectWithoutContext ("/NodeList/"+m_node+"/ServerHits",
                                 MakeCallback (&ProducerTracer::ServerHits, this));
    Reset ();
}


void
ProducerTracer::SetAveragingPeriod (const Time &period)
{
  m_period = period;
  m_printEvent.Cancel ();
  m_printEvent = Simulator::Schedule (m_period, &ProducerTracer::PeriodicPrinter, this);
}

void
ProducerTracer::PeriodicPrinter ()
{
  Print (*m_os);
  Reset ();
  
  m_printEvent = Simulator::Schedule (m_period, &ProducerTracer::PeriodicPrinter, this);
}

void
ProducerTracer::PrintHeader (std::ostream &os) const
{
  os << "Time" << "\t"
     << "Node" << "\t"
     << "Type" << "\t"
     << "Packets" << "\t";
}

void
ProducerTracer::Reset ()
{
  m_stats.Reset();
}
    
#define PRINTER(printName, fieldName)           \
  os << time.ToDouble (Time::S) << "\t"         \
  << m_node << "\t"                             \
  << printName << "\t"                          \
  << m_stats.fieldName << "\n";

void
ProducerTracer::Print (std::ostream &os) const
{
  Time time = Simulator::Now ();

  PRINTER ("ServerHits",   m_serverHits);
}

void
ProducerTracer::ServerHits (Ptr<const Interest>)
{
  std::cout << "Now i ma in the producer tracer! Hey Yo!" << std::endl;//(+)
  m_stats.m_serverHits ++;
}
    

} // namespace ndn
} // namespace ns3