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/// \file B2/src/B2CellSD.cc
/// \brief Implementation of the B2CellSD class
//

#include "B2CellSD.hh"
#include "B2CellHit.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4ParticleDefinition.hh"
#include "G4VTouchable.hh"
#include "G4TouchableHistory.hh"
#include "G4SystemOfUnits.hh"
#include "G4ios.hh"

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B2CellSD::B2CellSD(G4String name)
:G4VSensitiveDetector(name),
 fNumberOfCellsInZ(10),fNumberOfCellsInPhi(20)
{
  G4String HCname;
  collectionName.insert(HCname="cellHitsCollection");
}

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B2CellSD::~B2CellSD()
{}

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void B2CellSD::Initialize(G4HCofThisEvent*)
{
G4cout<<"B2CellSD-----------------------collectionName[0] ="<<collectionName[0]<<" collectionName[1]= "<<collectionName[1]<<G4endl;

  fCalCollection = new B2CellHitsCollection
                      (SensitiveDetectorName,collectionName[0]); 
  for(G4int j=0;j<fNumberOfCellsInZ;j++)
  for(G4int k=0;k<fNumberOfCellsInPhi;k++)
  {
    fCellID[j][k] = -1;
  }
  verboseLevel = 0;
}

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G4bool B2CellSD::ProcessHits(G4Step*aStep,G4TouchableHistory*)
{
//***** B2CellSD has been migrated to Geant4 version 10 that does not
//***** support Readout Geometry in multi-threaded mode. Now B2CellSD
//***** is assigned to a dedicated parallel world. The pointer "aStep" points to
//***** a G4Step object for the parallel world.

  G4double edep = aStep->GetTotalEnergyDeposit();
  if(verboseLevel>1) G4cout << "Next step edep(MeV) = " << edep/MeV << G4endl;
  if(edep==0.) return false;

  const G4VTouchable* touchable = aStep->GetPreStepPoint()->GetTouchable();
  G4int copyIDinZ = touchable->GetReplicaNumber(0);
  G4int copyIDinPhi = touchable->GetReplicaNumber(1);
  //seems no difference b/w replica no and copy no
  //G4int copyNoZ = touchable->GetCopyNumber();
  //G4int copyNoPhi = touchable->GetCopyNumber(1);
  //
  G4ThreeVector worldPosition = aStep->GetPreStepPoint()->GetPosition();
  G4ThreeVector localPosition = touchable->GetHistory()->
                                      GetTopTransform().TransformPoint(worldPosition);
  //G4ThreeVector momentum = aStep->GetPreStepPoint()->GetMomentum();

  //calculate eta and phi
  G4double theta = std::acos(worldPosition[2]/sqrt(std::pow(worldPosition[0],2) + pow(worldPosition[1],2) + pow(worldPosition[2],2)))/deg;
 
  G4double eta = - std::log(tan((theta/2)*deg));

  G4double phi = std::atan2(worldPosition[1],worldPosition[0])/deg;
  //G4cout << " theta ="<<theta<<" eta="<<eta<<" worldPosition="<<worldPosition<<" phi="<<phi<<" localPosition="<<localPosition<<G4endl;
 
 if(fCellID[copyIDinZ][copyIDinPhi]==-1)
  {
    B2CellHit* calHit
      = new B2CellHit
          (touchable->GetVolume()->GetLogicalVolume(),copyIDinZ,copyIDinPhi);
    calHit->SetEdep( edep );
//    G4AffineTransform aTrans = touchable->GetHistory()->GetTopTransform();
//    aTrans.Invert();
    G4int icell = fCalCollection->insert( calHit );
    //calHit->SetPos(aTrans.NetTranslation());
    calHit->SetEta(eta);
    calHit->SetCellPhi(phi);
    calHit->SetPos(worldPosition);
//    calHit->SetRot(aTrans.NetRotation());
//G4cout<<"touchable->GetVolume()->GetLogicalVolume()="<<touchable->GetVolume()->GetLogicalVolume()<<
//    "icell ="<<icell<<G4endl;

    fCellID[copyIDinZ][copyIDinPhi] = icell - 1;

    if(verboseLevel>0)
    { G4cout << " New Cell Hit on fCellID " 
  
           << copyIDinZ << " " <<copyIDinPhi << " " <<calHit->GetCellPhi()<<" "<<G4endl; }
           //<< copyIDinZ << " " <<copyNoZ<< " " <<copyIDinPhi << " " <<copyNoPhi<<G4endl; }
   }
  else
  { 
    (*fCalCollection)[fCellID[copyIDinZ][copyIDinPhi]]->AddEdep(edep);
   if(verboseLevel>0)
    { G4cout << " Energy added to fCellID " 
           << copyIDinZ << " " << copyIDinPhi <<" "<<worldPosition<<" "<<phi<< G4endl;
	
   //G4cout <<"\n"<< "fCellID info: ReplicaNo "
//	           <<touchable->GetReplicaNumber(1) << ", CopyNo " <<touchable->GetCopyNumber(1) <<", HistoryDepth "<<touchable->GetHistoryDepth()<< G4endl;

	 }
  }

  return true;
}

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void B2CellSD::EndOfEvent(G4HCofThisEvent*HCE)
{
G4cout<<"check-2-------------------------"<<G4endl;

static G4int HCID = -1;
  if(HCID<0)
  { HCID = GetCollectionID(0); }
  HCE->AddHitsCollection( HCID, fCalCollection );
}

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void B2CellSD::clear()
{} 

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void B2CellSD::DrawAll()
{} 

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void B2CellSD::PrintAll()
{} 

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