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//
/// \file optical/LXe/src/LXeTrackingAction.cc
/// \brief Implementation of the LXeTrackingAction class
//
//
#include "LXeTrackingAction.hh"

#include "LXeDetectorConstruction.hh"
#include "LXeTrajectory.hh"
#include "LXeUserTrackInformation.hh"

#include "G4OpticalPhoton.hh"
#include "G4Track.hh"
#include "G4TrackingManager.hh"

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

LXeTrackingAction::LXeTrackingAction() {}

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

void LXeTrackingAction::PreUserTrackingAction(const G4Track* aTrack)
{
  // Let this be up to the user via vis.mac
  //  fpTrackingManager->SetStoreTrajectory(true);

  // Use custom trajectory class
  fpTrackingManager->SetTrajectory(new LXeTrajectory(aTrack));

  // This user track information is only relevant to the photons
  fpTrackingManager->SetUserTrackInformation(new LXeUserTrackInformation);
}

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

void LXeTrackingAction::PostUserTrackingAction(const G4Track* aTrack)
{
  LXeTrajectory* trajectory =
    (LXeTrajectory*) fpTrackingManager->GimmeTrajectory();
  LXeUserTrackInformation* trackInformation =
    (LXeUserTrackInformation*) aTrack->GetUserInformation();

  // Let's choose to draw only the photons that hit the sphere and a pmt
  if(aTrack->GetDefinition() == G4OpticalPhoton::OpticalPhotonDefinition())
  {
    const G4VProcess* creator = aTrack->GetCreatorProcess();
    if(creator && creator->GetProcessName() == "OpWLS")
    {
      trajectory->WLS();
      trajectory->SetDrawTrajectory(true);
    }

    if(LXeDetectorConstruction::GetSphereOn())
    {
      if((trackInformation->GetTrackStatus() & hitPMT) &&
         (trackInformation->GetTrackStatus() & hitSphere))
      {
        trajectory->SetDrawTrajectory(true);
      }
    }
    else
    {
      if(trackInformation->GetTrackStatus() & hitPMT)
        trajectory->SetDrawTrajectory(true);
    }
  }
  // draw all other (not optical photon) trajectories
  else
    trajectory->SetDrawTrajectory(true);

  if(trackInformation->GetForceDrawTrajectory())
    trajectory->SetDrawTrajectory(true);
}