#include <uuid/uuid.h>
#include <iostream>
#include <iomanip>

#include "km3net-dataformat/offline/MultiHead.hh"
#include "km3net-dataformat/offline/Head.hh"
#include "km3net-dataformat/offline/Evt.hh"

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

#include "JSupport/JMeta.hh"
#include "JSupport/JLimit.hh"
#include "JSupport/JSupport.hh"
#include "JSupport/JFileRecorder.hh"
#include "JSupport/JMultipleFileScanner.hh"
#include "JSupport/JMonteCarloFileSupportkit.hh"


/**
 * \file
 * Application for splitting an offline file in two parts,\n
 * one containing all even-numbered events, another containing all odd-numbered events
 *
 * \author bjung
 */

int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;
  using namespace KM3NETDAQ;

  typedef JTYPELIST<JAAnetTypes_t, JMetaTypes_t>::typelist   typelist;
  
  
  JMultipleFileScanner<Evt>        inputFile;
  pair<JFileRecorder<typelist>,
       JFileRecorder<typelist> >   outputFiles;

  int                              debug;

  try {
    
    JParser<> zap;
    
    zap['f'] = make_field(inputFile);
    zap['o'] = make_field(outputFiles) = make_pair(JFileRecorder<typelist>("part1.root"),
						   JFileRecorder<typelist>("part2.root"));
    zap['d'] = make_field(debug)       = 1;

    zap(argc, argv);
  }
  catch(const exception& error) {
    FATAL(error.what() << endl);
  }
  
  
  outputFiles.first.open();
  outputFiles.second.open();  
  
  outputFiles.first.put(JMeta(argc, argv));
  outputFiles.second.put(JMeta(argc, argv));  

  while (inputFile.hasNext()) {
 
    STATUS("event: " << setw(10) << inputFile.getCounter() << '\r'); DEBUG(endl);

    const Evt* event = inputFile.next();

    if (inputFile.getCounter() & 1) { // Separate even and odd events
      outputFiles.first.put(*event);
    } else {
      outputFiles.second.put(*event);
    }
  }
  
  JHead header = getHeader(inputFile);
  header.UUID.clear();
  header.createUUID();

  if (is_gseagen(header) || is_corsika(header)) {
    header.genvol.numberOfEvents /= 2;
  }

  Head head;
  copy(header, head);

  outputFiles.first.put(head);
  outputFiles.second.put(head);  

  JMultipleFileScanner<JTYPELIST<JMetaTypes_t, Head, MultiHead>::typelist> io(inputFile);

  io >> outputFiles.first;
  io >> outputFiles.second;  
  
  outputFiles.first.close();
  outputFiles.second.close();  
  
  return 0;
}