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// $Id: SteppingAction.cc,v 1.6 2010/10/13 13:50:22 vnivanch Exp $
// GEANT4 tag $Name: examples-V09-03-09 $
//
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#include "SteppingAction.hh"
#include "RunAction.hh"
#include "G4SteppingManager.hh"
#include "G4VProcess.hh"
#include "G4ParticleTypes.hh"
#include "G4UnitsTable.hh"
#include "HistoManager.hh"
#include "G4EmProcessSubType.hh"

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SteppingAction::SteppingAction(RunAction* RuAct, HistoManager* histo)
:runAction(RuAct), histoManager(histo)
{ }

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SteppingAction::~SteppingAction()
{ }

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void SteppingAction::UserSteppingAction(const G4Step* aStep)
{
  const G4VProcess* process = aStep->GetPostStepPoint()->GetProcessDefinedStep();
  if (process == 0) { return; }

  static G4int iCalled=0;
  const  G4int nprint=0; // set to 10 to get debug print for first 10 calls

  if (fSynchrotronRadiation == process->GetProcessSubType())
    {
      ++iCalled;
      const G4StepPoint* PrePoint = aStep->GetPreStepPoint();
      const G4TrackVector* secondary = fpSteppingManager->GetSecondary();

      //(*secondary)[lp-1]  points to the last photon generated
      //   
      size_t lp=(*secondary).size();
      if (lp)
	{
	  G4double  Egamma =  (*secondary)[lp-1]->GetTotalEnergy();
	  runAction->n_gam_sync++;
	  runAction->e_gam_sync += Egamma;
	  runAction->e_gam_sync2 += Egamma*Egamma;
	  if (Egamma > runAction->e_gam_sync_max) 
	    { 
	      runAction->e_gam_sync_max = Egamma;
	    }
	  runAction->lam_gam_sync += aStep->GetStepLength();
	  if (iCalled<nprint)
	    {
	      G4double      Eelec  = PrePoint->GetTotalEnergy();
	      G4ThreeVector Pelec  = PrePoint->GetMomentum();
	      G4ThreeVector PGamma = (*secondary)[lp-1]->GetMomentum();
	      G4bool IsGamma = 
		((*secondary)[lp-1]->GetDefinition() == G4Gamma::Gamma());
	    
	      G4cout << "UserSteppingAction processName=" << process->GetProcessName()
		     << " Step Length=" << std::setw(6) 
		     << G4BestUnit(aStep->GetStepLength(),"Length")
		     << " Eelec=" << G4BestUnit(Eelec,"Energy")
		     << " Pelec=" << G4BestUnit(Pelec,"Energy")
		     << " IsGamma=" << IsGamma
		     << " Egamma=" << G4BestUnit(Egamma,"Energy")
		     << " PGamma=" << G4BestUnit(PGamma,"Energy")
		     << " #secondaries lp=" << lp
		     << '\n';
	    }
	  histoManager->FillHisto(1,Egamma);

	  // power spectrum : gamma weighted with its energy
	  histoManager->FillHisto(2,Egamma,Egamma/keV); 

	  histoManager->FillHisto(3,aStep->GetStepLength());
	}
    }
}

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