#include <string>
#include <limits>

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

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

#include "JDetector/JModuleRouter.hh"
#include "JDetector/JDetectorToolkit.hh"

#include "JDynamics/JDynamics.hh"

#include "JSupport/JParallelFileScanner.hh"
#include "JSupport/JSupport.hh"
#include "JSupport/JFileRecorder.hh"
#include "JSupport/JMeta.hh"
#include "JSupport/JTreeScanner.hh"
#include "JSupport/JSummaryFileRouter.hh"

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

#include "JReconstruction/JEvt.hh"
#include "JReconstruction/JShowerEnergyCorrection.hh"
#include "JReconstruction/JShowerParameters.hh"
#include "JReconstruction/JShowerFitParameters_t.hh"
#include "JReconstruction/JShowerFit.hh"
#include "JReconstruction/JMultiThreadedReconstruction.hh"

#include "JLang/JSharedPointer.hh"

/**
 * \file
 *
 * Program to perform EM Shower Fit for ORCA with I/O of JFIT::JEvt data.
 * The reconstruction is made at the PMT level.
 * \author adomi
 */

int main(int argc, char** argv){

  using namespace std;
  using namespace JPP;
  using namespace KM3NETDAQ;
  
  typedef JTYPELIST<JAllTypes_t, JFIT::JEvt>::typelist             typelist;
  typedef JParallelFileScanner< JTypeList<JDAQEvent, JFIT::JEvt> > JParallelFileScanner_t;
  typedef JParallelFileScanner_t::multi_pointer_type               multi_pointer_type;
  typedef JTYPELIST<JCOMPASS::JOrientation,
		    JACOUSTICS::JEvt>::typelist                    calibration_types;
  typedef JMultipleFileScanner<calibration_types>                  JCalibration_t;
 
  
  JParallelFileScanner_t      inputFile;
  JFileRecorder<typelist>     outputFile;
  JShowerFitParameters_t      parameters;
  JLimit_t&                   numberOfEvents = inputFile.getLimit();
  string                      detectorFile;
  JCalibration_t              calibrationFile;
  double                      Tmax_s;
  string                      pdfFile;
  JShowerEnergyCorrection     correct;
  size_t                      threads;                              // number of parallel threads
  int                         debug;

  try { 

    JParser<> zap;
   
    zap['f'] = make_field(inputFile)           ;
    zap['o'] = make_field(outputFile)          = "JORCAShowerFit_Output.root";
    zap['a'] = make_field(detectorFile)        ;
    zap['+'] = make_field(calibrationFile)     = JPARSER::initialised();
    zap['T'] = make_field(Tmax_s)              = 100.0;
    zap['P'] = make_field(pdfFile)             ;
    zap['E'] = make_field(correct)             = JShowerEnergyCorrection();      // off
    zap['@'] = make_field(parameters)          = JPARSER::initialised();
    zap['n'] = make_field(numberOfEvents)      = JLimit::max();
    zap['N'] = make_field(threads)             = 0;
    zap['d'] = make_field(debug)               = 2;
   
    zap(argc, argv);
  }
  catch(const exception& error) {
    FATAL(error.what() << endl);
  }


  getTreeParameters<Evt>().setSplitLevel(0);

  JDetector detector;
  
  try {
    load(detectorFile, detector);
  }
  catch(const JException& error) {
    FATAL(error);
  }

  unique_ptr<JDynamics> dynamics;

  if (!calibrationFile.empty()) {

    try {

      dynamics.reset(new JDynamics(detector, Tmax_s));
      
      dynamics->load(calibrationFile);
    }
    catch(const exception& error) {
      FATAL(error.what());
    }
  }
 
  const JModuleRouter router(dynamics ? dynamics->getDetector() : detector);
 
  JSummaryFileRouter  summary(inputFile, parameters.R_Hz);

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

  {

    const JShowerFit::storage_type storage(pdfFile);
    JShowerFit fit(parameters, storage, correct, debug);
    
    JMultiThreadedReconstruction<JShowerFit> fits(fit, outputFile, threads, 2 * threads);

    while (inputFile.hasNext()) {

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

      multi_pointer_type ps  = inputFile.next();

      JDAQEvent*         tev = ps;
      JFIT::JEvt*        in  = ps;

      summary.update(*tev);

      if (dynamics) {
	dynamics->update(*tev);
      }

      auto input = fit.getInput(router, summary, *tev, *in, dynamics ? dynamics->getCoverage() : coverage_type());

      if (threads > 0)
	fits.enqueue(input);
      else
	outputFile.put(fit(input));
    }
    STATUS(endl);
  }
   
  JSingleFileScanner<JRemove<typelist, JFIT::JEvt>::typelist> io(inputFile);

  io >> outputFile;

  outputFile.close();
}