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//
// History:
// -----------
//  10 Nov 2021   S. Guatelli & S. Bakr, Wollongong University - 1st implementation
//
// Class description
// ----------------
//  Computation of K, L & M shell ECPSSR ionisation cross sections for protons and alphas
//  Based on the work of
//  - S. Bakr et al. (2021) NIM B, 507:11–19.
//  - S. Bakr et al (2018), NIMB B, 436: 285-291. 
// ---------------------------------------------------------------------------------------

#include <fstream>
#include <iomanip>

#include "G4ANSTOecpssrKxsModel.hh"

#include "globals.hh"
#include "G4SystemOfUnits.hh"
#include "G4ios.hh"

#include "G4EMDataSet.hh"
#include "G4LogLogInterpolation.hh"
#include "G4Proton.hh"
#include "G4Alpha.hh"

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

G4ANSTOecpssrKxsModel::G4ANSTOecpssrKxsModel()
{

  G4cout << "Using ANSTO K Cross Sections! "<< G4endl;

  interpolation = new G4LogLogInterpolation();
  for (G4int i=6; i<93; i++)
  {
      protonDataSetMap[i] = new G4EMDataSet(i,interpolation);
      protonDataSetMap[i]->LoadData("pixe_ANSTO/proton/k-");
  }

  for (G4int i=6; i<93; i++)
  {
      alphaDataSetMap[i] = new G4EMDataSet(i,interpolation);
      alphaDataSetMap[i]->LoadData("pixe_ANSTO/alpha/k-");
  }

}

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

G4ANSTOecpssrKxsModel::~G4ANSTOecpssrKxsModel()
{
  protonDataSetMap.clear();
  alphaDataSetMap.clear();
  delete interpolation;
}

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

G4double G4ANSTOecpssrKxsModel::CalculateCrossSection(G4int zTarget,G4double massIncident, G4double energyIncident)
{
  G4Proton* aProton = G4Proton::Proton();
  G4Alpha* aAlpha = G4Alpha::Alpha();
  G4double sigma = 0;

  if (massIncident == aProton->GetPDGMass())
    {
      if (energyIncident > 0.2*MeV && energyIncident < 5.*MeV && zTarget < 93 && zTarget > 5) {

	        sigma = protonDataSetMap[zTarget]->FindValue(energyIncident/MeV);
	        if (sigma !=0 && energyIncident > protonDataSetMap[zTarget]->GetEnergies(0).back()*MeV) return 0.;
        }
    }
    
  else if (massIncident == aAlpha->GetPDGMass())
        {
          if (energyIncident > 0.2*MeV && energyIncident < 40.*MeV && zTarget < 93 && zTarget > 5) {

        	sigma = alphaDataSetMap[zTarget]->FindValue(energyIncident/MeV);
        	if (sigma !=0 && energyIncident > alphaDataSetMap[zTarget]->GetEnergies(0).back()*MeV) return 0.;
          }
         }
          
   else
          {
	          sigma = 0.;
          }
        
  // sigma is in internal units: it has been converted from
  // the input file in barns bt the EmDataset
  return sigma;
}