#ifndef __JSUPPORT__JSUPPORTTOOLKIT__
#define __JSUPPORT__JSUPPORTTOOLKIT__

#include <string>
#include <exception>

#include "TDirectory.h"

#include "km3net-dataformat/online/JDAQClock.hh"

#include "JDAQ/JDAQEvaluator.hh"
#include "JDAQ/JDAQSummarysliceIO.hh"
#include "JDAQ/JDAQTimesliceIO.hh"
#include "JDAQ/JDAQUTCExtendedIO.hh"
#include "JDAQ/JSupport.hh"
#include "JTrigger/JTriggerParameters.hh"
#include "JTools/JRange.hh"
#include "JSupport/JFilenameSupportkit.hh"
#include "JSupport/JFileScanner.hh"
#include "JSupport/JTreeScanner.hh"
#include "JSupport/JMultipleFileScanner.hh"
#include "JSupport/JTriggerParametersSupportkit.hh"


/**
 * \file
 * Support methods.
 * \author mdejong
 */
namespace JSUPPORT {}
namespace JPP { using namespace JSUPPORT; }

namespace JSUPPORT {

  using KM3NETDAQ::JDAQUTCExtended;


  /**
   * Type definition for frame index range.
   */
  typedef JTOOLS::JRange<int>               JFrameIndexRange;

  /**
   * Type definition for DAQ UTC time range.
   */
  typedef JTOOLS::JRange<JDAQUTCExtended>   JDAQUTCTimeRange;


  /**
   * Get time duration of given UTC time range.
   *
   * \param  utc               UTC time range
   * \return                   time duration [s]
   */
  inline double getTimeDuration(const JDAQUTCTimeRange& utc)
  {
    if (utc.is_valid())
      return (utc.getUpperLimit().getTimeNanoSecond() - 
	      utc.getLowerLimit().getTimeNanoSecond()) * 1.0e-9;
    else
      return 0.0;
  }


  /**
   * Get run number for given file name of data taking run.
   *
   * \param  file_name         file name
   * \return                   run number
   */
  template<class T>
  inline int getRunNumber(const std::string& file_name)
  {
    JFileScanner<T> in(file_name.c_str());

    if (in.hasNext())
      return in.next()->getRunNumber();
    else
      return -1;
  }


  /**
   * Get range of frame indices.
   *
   * \param  in                TTree scanner
   * \return                   frame index range
   */
  template<class T>
  inline JFrameIndexRange getFrameIndexRange(JTreeScannerInterface<T, KM3NETDAQ::JDAQEvaluator>& in)
  {
    if (!in.empty())
      return JFrameIndexRange(in.begin()->getFrameIndex(), in.rbegin()->getFrameIndex());
    else
      return JFrameIndexRange(0,0);
  }


  /**
   * Get range of frame indices for given file name of data taking run.
   *
   * \param  file_name         file name
   * \return                   frame index range
   */
  template<class T>
  inline JFrameIndexRange getFrameIndexRange(const std::string& file_name)
  {
    JFrameIndexRange result(JFrameIndexRange::DEFAULT_RANGE());

    TDirectory* dir = TDirectory::CurrentDirectory();
      
    if (isROOTFile(file_name.c_str())) {

      JTreeScanner<T, KM3NETDAQ::JDAQEvaluator> in(file_name);

      return getFrameIndexRange(in);

    } else {

      JFileScanner<T> in(file_name.c_str());

      while (in.hasNext()) {
	result.include(in.next()->getFrameIndex());
      }
    }

    if (dir != NULL) {
      dir->cd();        // restore current working directory
    }
      
    return result;
  }


  /**
   * Get UTC time range.
   *
   * \return                   UTC time range
   */
  inline JDAQUTCTimeRange getUTCTimeRange()
  {
    return JDAQUTCTimeRange(JDAQUTCExtended(), JDAQUTCExtended());
  }


  /**
   * Get UTC time range.
   *
   * \param  in                TTree scanner
   * \return                   UTC time range
   */
  template<class T>
  inline JDAQUTCTimeRange getUTCTimeRange(JTreeScannerInterface<T, KM3NETDAQ::JDAQEvaluator>& in)
  {
    if (!in.empty())
      return JDAQUTCTimeRange(in.begin()->getTimesliceStart(), in.rbegin()->getTimesliceStart());
    else
      return getUTCTimeRange();
  }


  /**
   * Get UTC time range for given file name of data taking run.
   *
   * \param  file_name         file name
   * \return                   UTC time range
   */
  template<class T>
  inline JDAQUTCTimeRange getUTCTimeRange(const std::string& file_name)
  {
    JDAQUTCTimeRange result(JDAQUTCTimeRange::DEFAULT_RANGE());

    TDirectory* dir = TDirectory::CurrentDirectory();

    if (isROOTFile(file_name.c_str())) {

      JTreeScanner<T, KM3NETDAQ::JDAQEvaluator> in(file_name);

      result = getUTCTimeRange(in);

    } else {

      for (JFileScanner<T> in(file_name.c_str()); in.hasNext(); ) {
	result.include(in.next()->getTimesliceStart());
      }
    }
      
    if (dir != NULL) {
      dir->cd();        // restore current working directory
    }
      
    return result;
  }


  /**
   * Get UTC time range for given file name of data taking run.
   * Get data taking live time.
   *
   * \param  __begin           begin of file list
   * \param  __end             end   of file list
   * \return                   UTC time range
   */
  template<class T>
  inline JDAQUTCTimeRange getUTCTimeRange(T __begin, T __end)
  {
    JDAQUTCTimeRange result(JDAQUTCTimeRange::DEFAULT_RANGE());

    for (T i = __begin; i != __end; ++i) {

      JDAQUTCTimeRange buffer = getUTCTimeRange<KM3NETDAQ::JDAQSummaryslice>(*i);

      if (buffer == getUTCTimeRange()) {
	buffer = getUTCTimeRange<KM3NETDAQ::JDAQTimeslice>(*i);
      }

      result.combine(buffer);
    }

    return result;
  }


  /**
   * Get data taking live time.
   *
   * \param  file_name         file name
   * \return                   live time [s]
   */
  inline double getLivetime(const std::string& file_name)
  {
    using namespace KM3NETDAQ;
    using namespace JTRIGGER;
    
    TDirectory* dir = TDirectory::CurrentDirectory();

    double livetime = 0.0;

    try {

      const JTriggerParameters parameters = getTriggerParameters(file_name);
    
      if (parameters.writeSummary.prescale != 0) {

	JTreeScanner<JDAQSummaryslice> in(file_name);

	livetime = in.getEntries() * getFrameTime() * 1.0e-9 / parameters.writeSummary.prescale;
      }
    }
    catch(const std::exception& error) {}
      
    if (dir != NULL) {
      dir->cd();        // restore current working directory
    }

    return livetime;
  }


  /**
   * Get data taking live time.
   *
   * \param  __begin           begin of file list
   * \param  __end             end   of file list
   * \return                   live time [s]
   */
  template<class T>
  inline double getLivetime(T __begin, T __end)
  {
    double livetime = 0.0;

    for (T i = __begin; i != __end; ++i) {
      livetime += getLivetime(*i);
    }

    return livetime;
  }


  /**
   * Get data taking live time.
   *
   * \param  file_list         file list
   * \return                   live time [s]
   */
  inline double getLivetime(const JMultipleFileScanner_t& file_list)
  {
    return getLivetime(file_list.begin(), file_list.end());
  }
}

#endif