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

#include "km3net-dataformat/definitions/weightlist.hh"

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

#include "JDAQ/JDAQEventIO.hh"
#include "JDAQ/JDAQTimesliceIO.hh"
#include "JDAQ/JDAQSummarysliceIO.hh"

#include "JTrigger/JTriggerParameters.hh"

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

#include "JAAnet/JHead.hh"
#include "JAAnet/JMultiHead.hh"

#include "JReconstruction/JEvt.hh"

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


/**
 * \file
 * Application for merging Monte-Carlo files.
 *
 * \author bjung
 */
int main(int argc, char **argv)
{
  using namespace std;
  using namespace JPP;
  using namespace KM3NETDAQ;

  typedef JTYPELIST<JRemove<JAllTypes_t, JDAQTimesliceTypes_t>::typelist, JFIT::JEvt>::typelist   typelist;
  
  
  JMultipleFileScanner_t  inputFiles;
  JFileRecorder<typelist> outputFile;

  int                     debug;

  try {
    
    JParser<> zap;
    
    zap['f'] = make_field(inputFiles);
    zap['o'] = make_field(outputFile)         = "merged.root";
    zap['d'] = make_field(debug)              = 1;

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

  outputFile.put(JMeta(argc, argv));

  // Create set of filescanners ordered based on header-info
  
  JEvtWeightFileScannerSet<> scanners(inputFiles);
  
  JHead commonHeader = scanners.begin()->getHeader();

  // Merge multi-headers
  
  JMultiHead eventHeaders = getMultiHeader(inputFiles); 
  
  for (JEvtWeightFileScannerSet<>::iterator scanner = scanners.begin(); scanner != scanners.end(); ++scanner) {

    JHead header = scanner->getHeader();
    header.createUUID(); // Ensure UUID is set

    commonHeader = commonHeader.getMatch(header);

    eventHeaders.merge(header);

    // Add event-weight normalisations
    
    while (scanner->hasNext()) {
	
      STATUS("Event:" << RIGHT(10) << scanner->getCounter() << '\r'); DEBUG(endl);
      
      const Evt* event = scanner->next();

      Evt out = *event;

      // Update event-weight normalisation
      
      if (out.w.size() <= WEIGHTLIST_NORMALISATION) {
	out.w.resize(WEIGHTLIST_NORMALISATION + 1, 0.0);
      }

      const JUUID headerUUID = (uuid_is_null(event->header_uuid) == 0 ? // is valid
				eventHeaders.getHeaderUUID(*event) : header.UUID);

      out.w[WEIGHTLIST_NORMALISATION] = eventHeaders.getNormalisation(headerUUID);
      
      uuid_copy(out.header_uuid, headerUUID.uuid);
      
      outputFile.put(out);
    }
  }

  Head newHead;
  copy(commonHeader, newHead);
  
  outputFile.put(newHead);

  outputFile.put(static_cast<const MultiHead&>(eventHeaders));
  
  JMultipleFileScanner<JRemove<typelist, JAAnetTypes_t>::typelist> io(inputFiles);

  io >> outputFile;
  
  outputFile.close();
  
  return 0;
}