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////////////////////////////////////////////////////////////////////////
// Optical Photon WaveLength Shifting (WLS) Class Definition
////////////////////////////////////////////////////////////////////////
//
// File:        G4OpWLS.hh
// Description: Discrete Process -- Wavelength Shifting of Optical Photons
// Version:     1.0
// Created:     2003-05-13
// Author:      John Paul Archambault
//              (Adaptation of G4Scintillation and G4OpAbsorption)
// Updated:     2005-07-28 add G4ProcessType to constructor
//              2006-05-07 - add G4VWLSTimeGeneratorProfile
//
////////////////////////////////////////////////////////////////////////

#ifndef G4OpWLS_h
#define G4OpWLS_h 1

#include "G4VDiscreteProcess.hh"
#include "G4OpticalPhoton.hh"

class G4VWLSTimeGeneratorProfile;

class G4OpWLS : public G4VDiscreteProcess
{
 public:
  explicit G4OpWLS(const G4String& processName = "OpWLS",
                   G4ProcessType type          = fOptical);
  virtual ~G4OpWLS();

  virtual G4bool IsApplicable(
    const G4ParticleDefinition& aParticleType) override;
  // Returns true -> 'is applicable' only for an optical photon.

  virtual void BuildPhysicsTable(
    const G4ParticleDefinition& aParticleType) override;
  // Build the WLS integral table at the right time

  virtual G4double GetMeanFreePath(const G4Track& aTrack, G4double,
                                   G4ForceCondition*) override;
  // Returns the absorption length for WLS absorption of optical
  // photons in media with a specified attenuation length.

  virtual G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
                                          const G4Step& aStep) override;
  // This is the method implementing WLS for optical photons.

  virtual G4PhysicsTable* GetIntegralTable() const;
  // Returns the address of the WLS integral table.

  virtual void DumpPhysicsTable() const;
  // Prints the WLS integral table.

  virtual void UseTimeProfile(const G4String name);
  // Selects the time profile generator

  virtual void PreparePhysicsTable(const G4ParticleDefinition&) override;
  virtual void Initialise();

  void SetVerboseLevel(G4int);

 protected:
  G4VWLSTimeGeneratorProfile* WLSTimeGeneratorProfile;
  G4PhysicsTable* theIntegralTable;

 private:
  G4OpWLS(const G4OpWLS& right) = delete;
  G4OpWLS& operator=(const G4OpWLS& right) = delete;

  std::size_t idx_wls = 0;
};

////////////////////
// Inline methods
////////////////////

inline G4bool G4OpWLS::IsApplicable(const G4ParticleDefinition& aParticleType)
{
  return (&aParticleType == G4OpticalPhoton::OpticalPhoton());
}

inline G4PhysicsTable* G4OpWLS::GetIntegralTable() const
{
  return theIntegralTable;
}

inline void G4OpWLS::DumpPhysicsTable() const
{
  std::size_t PhysicsTableSize = theIntegralTable->entries();
  G4PhysicsFreeVector* v;

  for(std::size_t i = 0; i < PhysicsTableSize; ++i)
  {
    v = (G4PhysicsFreeVector*) (*theIntegralTable)[i];
    v->DumpValues();
  }
}

#endif /* G4OpWLS_h */