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/// \file electromagnetic/TestEm18/src/SteppingAction.cc
/// \brief Implementation of the SteppingAction class
//
//
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#include "SteppingAction.hh"

#include "EventAction.hh"
#include "HistoManager.hh"
#include "RunAction.hh"

#include "G4ParticleTypes.hh"
#include "G4Step.hh"

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SteppingAction::SteppingAction(RunAction* RA, EventAction* EA) : fRunaction(RA), fEventaction(EA) {}

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void SteppingAction::UserSteppingAction(const G4Step* step)
{
  // energy continuously deposited along trajectory
  //
  G4int trackID = step->GetTrack()->GetTrackID();
  G4double Edep = step->GetTotalEnergyDeposit();
  if (Edep > 0.) fEventaction->SumEnergyDeposited(trackID, Edep);

  // the rest for primary track only
  if (trackID > 1) return;

  // count processes
  //
  const G4StepPoint* endPoint = step->GetPostStepPoint();
  const G4VProcess* process = endPoint->GetProcessDefinedStep();
  G4String procName = process->GetProcessName();
  G4int subtype = process->GetProcessSubType();
  G4int nbsec = step->GetNumberOfSecondariesInCurrentStep();
  if ((subtype == 2) && (nbsec == 0)) procName = "Edep alone";
  fRunaction->CountProcesses(procName);

  // step size and track length
  //
  G4double stepSize = step->GetStepLength();
  fRunaction->TrackLength(stepSize);
  G4AnalysisManager::Instance()->FillH1(1, stepSize);

  if (nbsec == 0) return;  // no secondary particles

  // energy transfered to secondary particles
  //
  const std::vector<const G4Track*>* secondaries = step->GetSecondaryInCurrentStep();
  G4double Etransfer = 0.;
  for (G4int itr = 0; itr < nbsec; itr++) {
    const G4Track* trk = (*secondaries)[itr];
    const G4ParticleDefinition* particle = trk->GetParticleDefinition();
    G4String name = particle->GetParticleName();
    G4double energy = trk->GetKineticEnergy();
    fRunaction->EnergySpectrumOfSecondaries(name, energy);
    G4int ih = 0;
    if (particle == G4Gamma::Gamma())
      ih = 11;
    else if (particle == G4Electron::Electron())
      ih = 12;
    else if (particle == G4Positron::Positron())
      ih = 13;
    if (ih > 0) G4AnalysisManager::Instance()->FillH1(ih, energy);
    if (subtype == 4) energy = trk->GetTotalEnergy();  //(e+,e-) production
    Etransfer += energy;
  }
  fEventaction->SumEnergyTransfered(process, Etransfer);
}

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