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#ifndef G4FASTSIMHITMAKER_HH
#define G4FASTSIMHITMAKER_HH

#include "G4TouchableHandle.hh"
#include "G4Navigator.hh"
#include "G4FastHit.hh"
#include "G4FastTrack.hh"
class G4Step;
class G4StepPoint;
class G4VProcess;

/**
 * @brief Helper class for hit creation
 *
 * Helper class that can be employed in the fast simulation models.
 * It allows to deposit energy at given position (G4FastHit), provided it is
 * located within the sensitive detector that derives from 
 * G4VFastSimSensitiveDetector base class.
 * An extended example extended/parameterisations/Par03 demonstrates how to use
 * G4FastSimHitMaker to create multiple deposits from the fast simulation model.
 *
 */

class G4FastSimHitMaker
{
 public:
  G4FastSimHitMaker();
  ~G4FastSimHitMaker();

  /// Deposit energy at given position.
  /// @param[in] aHit Created hit (energy and position)
  /// @param[in] aTrack Fast track with access to particle's track and
  /// properties in envelope's local coordinates
  void make(const G4FastHit& aHit, const G4FastTrack& aTrack);
  /// If sensitive detector class is in the parallel world, it must be
  /// specified, otherwise no sensitive detector will be found (mass geometry
  /// will be checked).
  /// @param[in] aName Name of the parallel world
  inline void SetNameOfWorldWithSD(const G4String& aName)
  {
    fWorldWithSdName = aName;
  };
  inline void SetProcess(G4VProcess* proc) { fpProcess = proc; }

 private:
  /// Touchable
  G4TouchableHandle fTouchableHandle;
  /// Navigator
  G4Navigator* fpNavigator;
  /// Flag specifying if navigator has been already set up
  G4bool fNaviSetup;
  /// Name of the world containing the sensitive detector. If empty, default
  /// mass world is used.
  G4String fWorldWithSdName;

  G4Step* fpSpotS;
  G4StepPoint* fpSpotP;
  G4VProcess* fpProcess = nullptr;
};
#endif