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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
// mail:        gum@triumf.ca
//              jparcham@phys.ualberta.ca
//
////////////////////////////////////////////////////////////////////////

#ifndef G4OpWLS_h
#define G4OpWLS_h 1

#include "globals.hh"
#include "templates.hh"
#include "Randomize.hh"
#include "G4Poisson.hh"
#include "G4ThreeVector.hh"
#include "G4ParticleMomentum.hh"
#include "G4Step.hh"
#include "G4VDiscreteProcess.hh"
#include "G4DynamicParticle.hh"
#include "G4Material.hh"
#include "G4OpticalPhoton.hh"
#include "G4PhysicsTable.hh"
#include "G4MaterialPropertiesTable.hh"
#include "G4PhysicsOrderedFreeVector.hh"
#include "G4VWLSTimeGeneratorProfile.hh"

// Class Description:
// Discrete Process -- Bulk absorption of Optical Photons.
// Class inherits publicly from G4VDiscreteProcess
// Class Description - End:

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 bulk 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 bulk absorption of optical
  // photons.

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

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

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

protected:

  G4VWLSTimeGeneratorProfile* WLSTimeGeneratorProfile;
  G4PhysicsTable* theIntegralTable;

private:

  G4OpWLS(const G4OpWLS &right) = delete;
  G4OpWLS& operator=(const G4OpWLS &right) = delete;
};

////////////////////
// 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
{
  G4int PhysicsTableSize = theIntegralTable->entries();
  G4PhysicsOrderedFreeVector *v;

  for (G4int i = 0; i < PhysicsTableSize; i++)
  {
    v = (G4PhysicsOrderedFreeVector*)(*theIntegralTable)[i];
    v->DumpValues();
  }
}

#endif /* G4OpWLS_h */
