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#ifndef G4ICRU90StoppingData_h
#define G4ICRU90StoppingData_h 1

//----------------------------------------------------------------------
//
// File name:    G4ICRU90StoppingData
//
// Description:  Data on electroninc stopping power from ICRU 90
//
// Author:       Lucas Norberto Burigo
//
// Creation date: 03.09.2018
//
// Modifications: 25.09.2018 V.Ivanchenko adopted for material sub-library
//
//----------------------------------------------------------------------------
//
// Class Description:
//
// Data on electonic stopping powers from ICRU 90 report
//
//

#include "G4Material.hh"
#include "G4PhysicsFreeVector.hh"
#include "globals.hh"

class G4ICRU90StoppingData
{
 public:

  G4ICRU90StoppingData();

  ~G4ICRU90StoppingData();

  // hide assignment operator
  G4ICRU90StoppingData& operator=(const G4ICRU90StoppingData& right) = delete;
  G4ICRU90StoppingData(const G4ICRU90StoppingData&) = delete;

  void Initialise();

  G4double GetElectronicDEDXforProton(const G4Material*, G4double kinEnergy) const;

  G4double GetElectronicDEDXforAlpha(const G4Material*, G4double scaledKinEnergy) const;

  inline G4int GetIndex(const G4Material*) const;

  inline G4int GetIndex(const G4String&) const;

  inline G4double GetElectronicDEDXforProton(G4int idx, G4double kinEnergy) const;

  inline G4double GetElectronicDEDXforAlpha(G4int idx, G4double scaledKinEnergy) const;

  inline G4bool IsApplicable(const G4Material*) const;

 private:

  inline G4double GetDEDX(const G4PhysicsFreeVector*, G4double e) const;

  void FillData();

  G4PhysicsFreeVector* AddData(G4int n, const G4float* e, const G4float* dedx);

  static constexpr G4int nvectors = 3;
  const G4Material* materials[nvectors];
  G4PhysicsFreeVector* sdata_proton[nvectors];
  G4PhysicsFreeVector* sdata_alpha[nvectors];
  G4bool isInitialized{false};
};

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

inline G4bool G4ICRU90StoppingData::IsApplicable(const G4Material* mat) const
{
  return (mat == materials[1] || mat == materials[0] || mat == materials[2]);
}

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

inline G4int G4ICRU90StoppingData::GetIndex(const G4Material* mat) const
{
  G4int idx = -1;
  if (mat == materials[1]) {
    idx = 1;
  }
  else if (mat == materials[0]) {
    idx = 0;
  }
  else if (mat == materials[2]) {
    idx = 2;
  }
  return idx;
}

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

inline G4int G4ICRU90StoppingData::GetIndex(const G4String& nam) const
{
  G4int idx = -1;
  if (nam == materials[1]->GetName()) {
    idx = 1;
  }
  else if (nam == materials[0]->GetName()) {
    idx = 0;
  }
  else if (nam == materials[2]->GetName()) {
    idx = 2;
  }
  return idx;
}

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

inline G4double G4ICRU90StoppingData::GetDEDX(const G4PhysicsFreeVector* data,
                                              G4double e) const
{
  const G4double emin = data->Energy(0);
  return (e >= emin) ? data->Value(e) : (*data)[0] * std::sqrt(e / emin);
}

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

inline G4double G4ICRU90StoppingData::GetElectronicDEDXforProton(
  G4int idx, G4double kinEnergy) const
{
  return (idx >= 0 && idx < nvectors) ? GetDEDX(sdata_proton[idx], kinEnergy) : 0.0;
}

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

inline G4double G4ICRU90StoppingData::GetElectronicDEDXforAlpha(
  G4int idx, G4double scaledKinEnergy) const
{
  return (idx >= 0 && idx < nvectors) ? GetDEDX(sdata_alpha[idx], scaledKinEnergy) : 0.0;
}

#endif