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//
//
// Author: Alexander Bagulya
//         11 March 2012
//         on the base of G4LivermoreComptonModel
//
// History:
// --------

#ifndef G4LivermoreComptonModel_h
#define G4LivermoreComptonModel_h 1

#include "G4VEmModel.hh"
#include "G4PhysicsFreeVector.hh"

class G4ParticleChangeForGamma;
class G4VAtomDeexcitation;
class G4ShellData;
class G4DopplerProfile;

class G4LivermoreComptonModel : public G4VEmModel
{
public:

  explicit G4LivermoreComptonModel(const G4ParticleDefinition* p = nullptr, 
		          const G4String& nam = "LivermoreCompton");
  ~G4LivermoreComptonModel() 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;
  
  G4LivermoreComptonModel & operator=(const  G4LivermoreComptonModel &right) = delete;
  G4LivermoreComptonModel(const  G4LivermoreComptonModel&) = delete;

private:
  void ReadData(const G4int ZZ);
  const G4String& FindDirectoryPath();
  G4double ComputeScatteringFunction(G4double x, G4int Z);

  G4ParticleChangeForGamma* fParticleChange;
  G4VAtomDeexcitation*      fAtomDeexcitation;

  static G4ShellData*       shellData;
  static G4DopplerProfile*  profileData;


  static G4PhysicsFreeVector* data[101]; // 101 because Z range is 1-100
  static const G4double ScatFuncFitParam[101][16];
  static G4String gDataDirectory;

  G4int verboseLevel;
  G4int maxZ = 100;
  G4bool isInitialised = false;

};

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#endif