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//
// Rich advanced example for Geant4
// PadHpdPhotoElectricEffect.hh for Rich of LHCb
// History:
// Created: Sajan Easo (Sajan.Easo@cern.ch)
// Revision and changes: Patricia Mendez (Patricia.Mendez@cern.ch)
/////////////////////////////////////////////////////////////////////////////
#ifndef PadHpdPhotoElectricEffect_h
#define PadHpdPhotoElectricEffect_h 1
#include "G4ios.hh" 
#include "globals.hh"
#include "Randomize.hh" 
#include "G4VDiscreteProcess.hh"
#include "G4PhotoElectricEffect.hh"
#include "G4DynamicParticle.hh"
#include "G4OpticalPhoton.hh" 
#include "G4Electron.hh"
#include "G4Step.hh"
#include "RichTbMaterialParameters.hh"
class RichTbAnalysisManager;
class RichTbRunConfig;

class PadHpdPhotoElectricEffect : public G4VDiscreteProcess {
public:

  PadHpdPhotoElectricEffect(const G4String&,RichTbRunConfig* );
  virtual ~PadHpdPhotoElectricEffect();
  
  G4bool IsApplicable(const G4ParticleDefinition&  );
  // is applicable for optical photon only

  G4double GetMeanFreePath(const G4Track& ,
				 G4double ,
				 G4ForceCondition* condition);
  //returns infinity (max integer possible) . This means the process does
  // not limit the step, but sets the Forced condition for the DoIt to be
  // invoked at every step. But only at the boundary between Hpd quartz 
  // window and the Hpd photocathode any action be taken.

  G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
				       const G4Step&  aStep);
  //The method for implementing the HpdPhotoelectric effect.


  G4double getHpdQEff(G4int, G4double);
  // To interpolate the QE from QE data.
  G4double getHpdPhElectronKE() 
  {return HpdPhElectronKE; }
  G4double getPhCathodeToSilDetDist()
  {return PhCathodeToSilDetDist; }
  G4double getHpdDemag(G4int hpdnum) {return DemagnificationFactor[hpdnum]; }
 private:
  //  RichTbAnalysisManager* rAnalysisPhy;
  RichTbRunConfig* rConfig;
  G4String PrePhotoElectricVolName;
  G4String PostPhotoElectricVolName;
  G4double HpdPhElectronKE;
  G4double PhCathodeToSilDetDist;
  G4double PSFsigma;
  std::vector<G4double>DemagnificationFactor;
  std::vector<G4double>DemagnificationQuadFactor;
  std::vector<std::vector<G4double> >HpdQE;
  std::vector<std::vector<G4double> >HpdWabin;

};

#endif