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//
/// \file SteppingAction.cc
/// \brief Implementation of the SteppingAction class

#include "SteppingAction.hh"
#include "DetectorConstruction.hh"

#include "G4Step.hh"
#include "G4Event.hh"
#include "G4RunManager.hh"
#include "G4LogicalVolume.hh"
#include <CLHEP/Units/SystemOfUnits.h>

#include "G4AnalysisManager.hh"

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SteppingAction::SteppingAction()
{}

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void SteppingAction::UserSteppingAction(const G4Step* step)
{

    G4String volumeName = step->GetPreStepPoint()->GetTouchableHandle()
                            ->GetVolume()->GetName();

    //if a particle enters the detector volume
    if (step->GetPreStepPoint()-> GetStepStatus()==G4StepStatus::fGeomBoundary&&
        volumeName=="Detector")
    {
        G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();

        //we are writing only charged particles
        if(std::abs(step->GetTrack()->GetDefinition()->GetPDGCharge())>DBL_EPSILON)
        {
            //coordinate in the horizontal plane
            G4double x0 = step->GetPreStepPoint()->GetPosition().getX()/CLHEP::mm;

            //filling histogram
            analysisManager->FillH1(0, x0);
        }

        //gamma spectrum
        if(step->GetTrack()->GetDefinition()->GetParticleName()=="gamma")
        {
            //coordinate in the horizontal plane
            G4double eGamma0 = step->GetPreStepPoint()->GetTotalEnergy()/CLHEP::MeV;

            //filling histogram
            analysisManager->FillH1(1, eGamma0);
        }
    }
}

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//}
