#include <string>
#include <iostream>
#include <iomanip>

#include "km3net-dataformat/offline/Head.hh"
#include "km3net-dataformat/offline/Evt.hh"
#include "km3net-dataformat/offline/Hit.hh"
#include "JDAQ/JDAQEventIO.hh"

#include "JSupport/JMultipleFileScanner.hh"
#include "JSupport/JTriggeredFileScanner.hh"
#include "JSupport/JMonteCarloFileSupportkit.hh"
#include "JSupport/JSupport.hh"

#include "Jeep/JPrint.hh"
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


/**
 * \file
 *
 * Example program to read Monte Carlo events.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;
  using namespace KM3NETDAQ;

  JMultipleFileScanner<> inputFile;
  JLimit_t       numberOfEvents;
  int            debug;

  try { 

    JParser<> zap("Example program to read Monte Carlo events.");
    
    zap['f'] = make_field(inputFile,      "list of files");
    zap['n'] = make_field(numberOfEvents, "number of events to read from file(s)")  = JLimit::max();
    zap['d'] = make_field(debug,          "debug level")                            = 3;
    
    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  {
    // template argument corresponds to objects which will be read from file(s)

    JMultipleFileScanner<Evt> in(inputFile, numberOfEvents);

    while (in.hasNext()) {

      STATUS("event: " << setw(10) << in.getCounter() << '\r'); DEBUG(endl);

      Evt* event = in.next();        // pointer to Monte Carlo event

      DEBUG("Monte Carlo event " << event->mc_id << endl);
    }
    STATUS(endl);
  }

  {
    // optional template argument(s) will be read in parallel to DAQ events

    JTriggeredFileScanner<> in(inputFile, numberOfEvents);

    while (in.hasNext()) {

      STATUS("event: " << setw(10) << in.getCounter() << '\r'); DEBUG(endl);

      JTriggeredFileScanner<>::multi_pointer_type ps = in.next();

      const JDAQEvent* tev   = ps;   // pointer to DAQ event
      const Evt*       event = ps;   // pointer to corresponding Monte Carlo event

      DEBUG("DAQ event         " << tev->getCounter() << endl);
      DEBUG("Monte Carlo event " << event->mc_id      << endl);
    }
    STATUS(endl);
  }
}