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

#include "SensitiveDetector.hh"

#include "SensitiveDetectorHit.hh"

#include "G4HCofThisEvent.hh"
#include "G4Navigator.hh"
#include "G4SDManager.hh"
#include "G4Step.hh"
#include "G4TouchableHistory.hh"
#include "G4Track.hh"
#include "G4ios.hh"

SensitiveDetector::SensitiveDetector(G4String name) : G4VSensitiveDetector(name)
{
  G4String HCname;
  collectionName.insert(HCname = "collection");
  fHCID = -1;
}

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SensitiveDetector::~SensitiveDetector() {}

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void SensitiveDetector::Initialize(G4HCofThisEvent* HCE)
{
  fHitsCollection = new SensitiveDetectorHitsCollection(SensitiveDetectorName, collectionName[0]);
  if (fHCID < 0) {
    fHCID = G4SDManager::GetSDMpointer()->GetCollectionID(fHitsCollection);
  }
  HCE->AddHitsCollection(fHCID, fHitsCollection);
}

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G4bool SensitiveDetector::ProcessHits(G4Step* aStep, G4TouchableHistory*)
{
  if (aStep->GetTrack()->GetTrackID() > 1) return true;

  G4StepPoint* postStepPoint = aStep->GetPostStepPoint();
  if (!(postStepPoint->GetStepStatus() == fGeomBoundary)) return true;

  G4StepPoint* preStepPoint = aStep->GetPreStepPoint();

  G4TouchableHistory* theTouchable = (G4TouchableHistory*)(preStepPoint->GetTouchable());
  G4VPhysicalVolume* thePhysical = theTouchable->GetVolume(0);
  G4int copyNo = thePhysical->GetCopyNo();

  G4ThreeVector worldPos = preStepPoint->GetPosition();

  SensitiveDetectorHit* aHit = new SensitiveDetectorHit(copyNo);
  aHit->SetLayerID(copyNo);
  aHit->SetWorldPos(worldPos);

  fHitsCollection->insert(aHit);
  return true;
}

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void SensitiveDetector::EndOfEvent(G4HCofThisEvent* /*HCE*/) {}

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