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//
//
// Author: Sebastien Incerti
//         30 October 2008
//         on base of G4LowEnergyPhotoElectric developed by A.Forti and M.G.Pia
//
// 15 Mar 2010   L. Pandola, removed methods to set explicitly fluorescence cuts.
//               Main cuts from G4ProductionCutsTable are always used
// 30 May 2011   A Mantero & V Ivanchenko Migration to model design for deexcitation
// 22 Oct 2012   A & V Ivanchenko Migration data structure to G4PhysicsVector
// 1 June 2017   M Bandieramonte

#ifndef G4LivermorePhotoElectricModel_h
#define G4LivermorePhotoElectricModel_h 1

#include "G4ElementData.hh"
#include "G4VEmModel.hh"

#include <vector>

class G4ParticleChangeForGamma;
class G4VAtomDeexcitation;
class G4PhysicsFreeVector;

class G4LivermorePhotoElectricModel : public G4VEmModel
{
public:
  explicit G4LivermorePhotoElectricModel(const G4String& nam = "LivermorePhElectric");

  ~G4LivermorePhotoElectricModel() override;

  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;

  G4double CrossSectionPerVolume(const G4Material*, const G4ParticleDefinition*,
				 G4double energy, G4double cutEnergy = 0.0,
				 G4double maxEnergy = DBL_MAX) override;

  G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*, G4double energy,
				      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 SetLimitNumberOfShells(G4int n) { nShellLimit = n; };
  G4double GetBindingEnergy(G4int Z, G4int shell);

  G4LivermorePhotoElectricModel& operator=
  (const G4LivermorePhotoElectricModel& right) = delete;
  G4LivermorePhotoElectricModel(const G4LivermorePhotoElectricModel&) = delete;

protected:
  G4ParticleChangeForGamma* fParticleChange = nullptr;

private:
  void ReadData(const G4int Z);

  void FindDirectoryPath();

  void InitialiseOnFly(G4int Z);

  const G4ParticleDefinition* theGamma;
  const G4ParticleDefinition* theElectron;
  G4VAtomDeexcitation* fAtomDeexcitation{nullptr};

  static constexpr G4int ZMAXPE{101}; // 101 because Z range is 1-100
  static G4ElementData* fCrossSection;
  static G4ElementData* fCrossSectionLE;
  static std::vector<G4double>* fParamHigh[ZMAXPE];
  static std::vector<G4double>* fParamLow[ZMAXPE];
  static G4int fNShells[ZMAXPE];
  static G4int fNShellsUsed[ZMAXPE];
  static G4Material* fWater;
  static G4double fWaterEnergyLimit;
  static G4String fDataDirectory;

  std::vector<G4double> fSandiaCof;

  G4double fCurrSection{0.0};
  G4int verboseLevel;
  G4int nShellLimit{100};
  G4bool fDeexcitationActive{false};
  G4bool isInitializer{false};
};

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

#endif