#ifndef OACALIBCALIBAPPLYBASE_ICALIBAPPLYEVENTFUNCTION_HXX
#define OACALIBCALIBAPPLYBASE_ICALIBAPPLYEVENTFUNCTION_HXX

#include "IVEventFunction.hxx"
#include "EoaCalibRecon.hxx"

/// A base class to apply calibration constants to IDigits to create IHits
///
/// It is assumeed that a derived concrete class is specified for each sub-detector (CDC, ECAL, etc).
/// The purpose of this class is to make the calib. apply code structure simple and easy 
/// and this is called by the CalibApplyGlobal's event loop function for each event.

class ICalibApplyEventFunction : public IVEventFunction
{
public:
  ICalibApplyEventFunction (const Char_t* name = "");
  virtual ~ICalibApplyEventFunction ();
  
  /// Return trace name for all calib. apply packages for debugging.
  const Char_t* GetFullName()
  {
    return Form("CalibApply%s", GetName());
  }

  /// Print the usage of CommonOptions for the calib. apply packages.
  static void UsageOfCommonOptions();
  
protected:
  /// Apply calibration to IDigits
  ///
  /// Any optional configuration should be done in BeginOfEvent(),
  /// SetOption(), or the constructor.
  /// @return the error code that indicates some error happened when != 0.
  virtual int ApplyCalibration(COMET::ICOMETEvent& event);

  /// Process an event with sequential for a  
  /// This is called by the CalibApplyGlobal's event loop
  ///
  /// Nobody can over-ride, Developer is expected to implement the separated classes,
  /// BeginOfEvent(), ApplyCalibration(), and EndOfEvent().
  /// @return the error code that indicates some error happened when != 0.
  int ProcessCore(COMET::ICOMETEvent& event);

  /// Add IHitSelection to ICOMETEvent's /hits/ directory
  void AddHitSelection(COMET::IHitSelection* hits, COMET::ICOMETEvent& event)
  {
    event.Get<COMET::IDataVector>("hits")->push_back(hits);
  }
  
private:
  /// Only function specific option whose argument string is common among all
  /// the derived recon event functions. 
  bool SetCommonOption(TString option, TString value = "");
};

#endif