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

#include "JAAnet/JAAnetToolkit.hh"
#include "JSupport/JMultipleFileScanner.hh"
#include "JSupport/JFileRecorder.hh"
#include "JSupport/JMonteCarloFileSupportkit.hh"
#include "JSupport/JSupport.hh"

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

#include "JSupport/JMeta.hh"


/**
 * \file
 * Auxiliary program to preprocess an aanet file.\n
 * Currently it provide support for the suppression of empty events from a file, but implementation of other options is encouraged.
 * \author mlincetto
 */

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

  JMultipleFileScanner<JAAnetTypes_t> inputFile;
  JFileRecorder       <JAAnetTypes_t> outputFile;
  JLimit_t&       numberOfEvents = inputFile.getLimit();
  int             debug;
  bool filterEmptyMCH;
  double timeOffset_ms;

  try {

    JParser<> zap("Auxiliary program to preprocess aanet files.");

    zap['f'] = make_field(inputFile);
    zap['o'] = make_field(outputFile);
    zap['n'] = make_field(numberOfEvents)                     = JLimit::max();
    zap['d'] = make_field(debug) = 1;
    zap['H'] = make_field(filterEmptyMCH, "Filter events without hits.");
    zap['T'] = make_field(timeOffset_ms, "Add time offset [ms] to events.") = 0;

    zap(argc, argv);
  }
  catch(const exception& error) {
    FATAL(error.what() << endl);
  }

  outputFile.open();

  // put header
  Head header = inputFile.getHeader();

  JMultipleFileScanner<Evt> in = inputFile;  

  outputFile.put(header);

  while (in.hasNext()) {
    
    Evt* cur = in.next();
    
    if (filterEmptyMCH and cur->mc_hits.empty()) { continue; } 
    
    if (timeOffset_ms != 0) { add_time_offset (*cur, 1.0e6 * timeOffset_ms); }

    outputFile.put(*cur);

  } // while
  
  outputFile.close();
}