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/// \file electromagnetic/TestEm11/src/TrackingAction.cc
/// \brief Implementation of the TrackingAction class
//
//
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#include "TrackingAction.hh"

#include "DetectorConstruction.hh"
#include "EventAction.hh"
#include "HistoManager.hh"
#include "Run.hh"

#include "G4PhysicalConstants.hh"
#include "G4Positron.hh"
#include "G4RunManager.hh"
#include "G4StepStatus.hh"
#include "G4Track.hh"

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TrackingAction::TrackingAction(DetectorConstruction* det,EventAction* evt)
:fDetector(det),fEventAct(evt)
{ }

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void TrackingAction::PostUserTrackingAction(const G4Track* track)
{
  G4int trackID = track->GetTrackID();
 
  G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
  Run* run 
    = static_cast<Run*>(
        G4RunManager::GetRunManager()->GetNonConstCurrentRun());
        
  //track length of primary particle or charged secondaries
  //
  G4double tracklen = track->GetTrackLength();
  if (trackID == 1) {
    run->AddTrackLength(tracklen);
    analysisManager->FillH1(3, tracklen);
  } else if (track->GetDefinition()->GetPDGCharge() != 0.)
    analysisManager->FillH1(6, tracklen);
           
  //extract projected range of primary particle
  //
  if (trackID == 1) {
    G4double x = track->GetPosition().x() + 0.5*fDetector->GetAbsorSizeX();
    run->AddProjRange(x);
    analysisManager->FillH1(5, x);
  }
            
  //mean step size of primary particle
  //
  if (trackID == 1) {
    G4int nbOfSteps = track->GetCurrentStepNumber();
    G4double stepSize = tracklen/nbOfSteps;
    run->AddStepSize(nbOfSteps,stepSize);
  }
            
  //status of primary particle : absorbed, transmited, reflected ?
  //
  if (trackID == 1) {
    G4int flag = 0;
    if (!track->GetNextVolume()) {
      if (track->GetMomentumDirection().x() > 0.) flag = 1;
      else                                        flag = 2;
    }
    run->AddTrackStatus(flag);
  }
 
  // where are we ?
  G4StepStatus status = track->GetStep()->GetPostStepPoint()->GetStepStatus();
  if (status == fWorldBoundary) {
    G4double eleak = track->GetKineticEnergy();
    if (track->GetDefinition() == G4Positron::Positron()) {
      eleak += 2*electron_mass_c2;
    }
    fEventAct->AddEleak(eleak);
  }
}

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