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// Author: Sebastien Incerti
//         31 March 2012
//         on base of G4LivermoreRayleighModel
//

#ifndef G4LivermoreRayleighModel_h
#define G4LivermoreRayleighModel_h 1

#include "G4ParticleChangeForGamma.hh"
#include "G4PhysicsFreeVector.hh"
#include "G4ProductionCutsTable.hh"
#include "G4VEmModel.hh"

class G4LivermoreRayleighModel : public G4VEmModel
{
public:
  explicit G4LivermoreRayleighModel();
  ~G4LivermoreRayleighModel() override;

  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
  void InitialiseLocal(const G4ParticleDefinition*, G4VEmModel* masterModel) override;
  void InitialiseForElement(const G4ParticleDefinition*, G4int Z) override;

  G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*, G4double kinEnergy, G4double Z,
                                      G4double A = 0, G4double cut = 0,
                                      G4double emax = DBL_MAX) override;

  void SampleSecondaries(std::vector<G4DynamicParticle*>*, const G4MaterialCutsCouple*,
                         const G4DynamicParticle*, G4double tmin, G4double maxEnergy) override;

  [[maybe_unused]] inline void SetLowEnergyThreshold(G4double);

  G4LivermoreRayleighModel& operator=(const G4LivermoreRayleighModel& right) = delete;
  G4LivermoreRayleighModel(const G4LivermoreRayleighModel&) = delete;

private:
  void ReadData(const G4int ZZ);
  const G4String& FindDirectoryPath();

  G4ParticleChangeForGamma* fParticleChange;

  static G4PhysicsFreeVector* dataCS[101];  // 101 because Z range is 1-100
  static G4String gDataDirectory;

  G4double lowEnergyLimit;
  G4int verboseLevel;
  G4int maxZ = 100;
  G4bool isInitialised = false;
};

[[maybe_unused]] inline void G4LivermoreRayleighModel::SetLowEnergyThreshold(G4double val)
{
  lowEnergyLimit = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

#endif