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//
// This example is provided by the Geant4-DNA collaboration
// chem6 example is derived from chem4 and chem5 examples
//
// Any report or published results obtained using the Geant4-DNA software
// shall cite the following Geant4-DNA collaboration publication:
// J. Appl. Phys. 125 (2019) 104301
// Med. Phys. 45 (2018) e722-e739
// J. Comput. Phys. 274 (2014) 841-882
// Med. Phys. 37 (2010) 4692-4708
// Int. J. Model. Simul. Sci. Comput. 1 (2010) 157-178
// The Geant4-DNA web site is available at http://geant4-dna.org
//
// Authors: W. G. Shin and S. Incerti (CENBG, France)
//
// $Id$
//
/// \file ScoreLET.cc
/// \brief Implementation of the ScoreLET class

#include "ScoreLET.hh"
#include "G4RunManager.hh"
#include "G4SystemOfUnits.hh"

ScoreLET::ScoreLET(G4String name)
  :G4VPrimitiveScorer(name),G4UImessenger(),fEvtMap(0)
{
  fLET = 0;
  fEdep = 0;
  fStepL = 0;
  fNEvent = 0;
  fTrackID = 1;

  fpLETDir = new G4UIdirectory("/scorer/LET/");
  fpLETDir->SetGuidance("LET scorer commands");

  fpCutoff = new G4UIcmdWithADoubleAndUnit("/scorer/LET/cutoff", this);

  fCutoff = DBL_MAX;
}

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

ScoreLET::~ScoreLET()
{
  delete fpLETDir;
  delete fpCutoff;
}

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

void ScoreLET::SetNewValue(G4UIcommand* command, G4String newValue){
  if(command == fpCutoff) fCutoff = atof(newValue);
}

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

G4bool ScoreLET::ProcessHits(G4Step* aStep,G4TouchableHistory* /*TH*/)
{
  // In order to follow the primary track
  // regardless charge increasing or decreasing
  if(aStep->GetTrack()->GetTrackID() != 1 &&
     aStep->GetTrack()->GetParticleDefinition()->GetPDGEncoding() != 11){
    G4int subType = aStep->GetTrack()->GetCreatorProcess()
                    ->GetProcessSubType();
    if(subType == 56 || subType == 57){
       fTrackID = aStep->GetTrack()->GetTrackID();
    }
  }

  // Ignore the step if it is not primary.
  if(aStep->GetTrack()->GetTrackID() != fTrackID) return false;
  else{
    fStepL += aStep->GetStepLength()/um;
    fEdep += aStep->GetTotalEnergyDeposit()/keV;

    G4int subType = aStep->GetPostStepPoint()->
                    GetProcessDefinedStep()->GetProcessSubType();

    // Don't add the kinetic energy of primary particle
    if(subType == 56 || subType == 57) return false;

    const std::vector<const G4Track*>* secondary =
                                       aStep->GetSecondaryInCurrentStep();

    size_t nbtrk = (*secondary).size();

    if(nbtrk){
      for(size_t lp=0;lp<nbtrk;lp++){
        // Store the kinetic energy of secondaries
        // which less than cutoff energy.
        if((*secondary)[lp]->GetKineticEnergy()/eV<fCutoff){
          fEdep += (*secondary)[lp]->GetKineticEnergy()/keV;
        }
      }
    }
  }
  return true;
}

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

void ScoreLET::Initialize(G4HCofThisEvent* HCE)
{
  fEvtMap = new G4THitsMap<G4double>(GetMultiFunctionalDetector()->GetName(),
                                     GetName());

  fEvtMap->clear();
  fNEvent = 0;
static G4int HCID = -1;
  if(HCID < 0) {HCID = GetCollectionID(0);}
  HCE->AddHitsCollection(HCID, (G4VHitsCollection*)fEvtMap);
}

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

void ScoreLET::EndOfEvent(G4HCofThisEvent*)
{
  fLET = fEdep / fStepL;
  if(!G4RunManager::GetRunManager()->GetCurrentEvent()->IsAborted())
  {
    fEvtMap->add(fNEvent,fLET);
    fNEvent++;
  }
  fTrackID = 1;
  fLET = 0;
  fEdep = 0;
  fStepL = 0;
}

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

G4int ScoreLET::GetIndex(G4Step* /*aStep*/)
{
  return 0;
}

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