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//
#include "LXePMTSD.hh"
#include "LXePMTHit.hh"
#include "LXeDetectorConstruction.hh"
#include "LXeUserTrackInformation.hh"

#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4ParticleDefinition.hh"
#include "G4VTouchable.hh"
#include "G4TouchableHistory.hh"
#include "G4ios.hh"
#include "G4ParticleTypes.hh"
#include "G4ParticleDefinition.hh"

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
LXePMTSD::LXePMTSD(G4String name)
  :G4VSensitiveDetector(name),pmtHitCollection(0),pmtPositionsX(0)
  ,pmtPositionsY(0),pmtPositionsZ(0)
{
  collectionName.insert("pmtHitCollection");
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
LXePMTSD::~LXePMTSD()
{}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXePMTSD::Initialize(G4HCofThisEvent* HCE){
  pmtHitCollection = new LXePMTHitsCollection
                      (SensitiveDetectorName,collectionName[0]); 
  //Store collection with event and keep ID
  static G4int HCID = -1;
  if(HCID<0){ 
    HCID = GetCollectionID(0); 
  }
  HCE->AddHitsCollection( HCID, pmtHitCollection );
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
G4bool LXePMTSD::ProcessHits(G4Step* ,G4TouchableHistory* ){
  return false;
}

//Generates a hit and uses the postStepPoint's mother volume replica number
//PostStepPoint because the hit is generated manually when the photon is
//absorbed by the photocathode
//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
G4bool LXePMTSD::ProcessHits_constStep(const G4Step* aStep,
				       G4TouchableHistory* ){

  //need to know if this is an optical photon
  if(aStep->GetTrack()->GetDefinition() 
     != G4OpticalPhoton::OpticalPhotonDefinition()) return false;
 
  //User replica number 1 since photocathode is a daughter volume
  //to the pmt which was replicated
  G4int pmtNumber=
    aStep->GetPostStepPoint()->GetTouchable()->GetReplicaNumber(1);
  G4VPhysicalVolume* physVol=
    aStep->GetPostStepPoint()->GetTouchable()->GetVolume(1);

  //Find the correct hit collection
  G4int n=pmtHitCollection->entries();
  LXePMTHit* hit=NULL;
  for(G4int i=0;i<n;i++){
    if((*pmtHitCollection)[i]->GetPMTNumber()==pmtNumber){
      hit=(*pmtHitCollection)[i];
      break;
    }
  }
  
  if(hit==NULL){//this pmt wasnt previously hit in this event
    hit = new LXePMTHit(); //so create new hit
    hit->SetPMTNumber(pmtNumber);
    hit->SetPMTPhysVol(physVol);
    pmtHitCollection->insert(hit);
    hit->SetPMTPos((*pmtPositionsX)[pmtNumber],(*pmtPositionsY)[pmtNumber],
		   (*pmtPositionsZ)[pmtNumber]);
  }

  hit->IncPhotonCount(); //increment hit for the selected pmt
    
  if(!LXeDetectorConstruction::GetSphereOn()){
    hit->SetDrawit(true);
    //If the sphere is disabled then this hit is automaticaly drawn
  }
  else{//sphere enabled
    LXeUserTrackInformation* trackInfo=
      (LXeUserTrackInformation*)aStep->GetTrack()->GetUserInformation();
    if(trackInfo->GetTrackStatus()&hitSphere) 
      //only draw this hit if the photon has hit the sphere first
      hit->SetDrawit(true);
  }
    
  return true;
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXePMTSD::EndOfEvent(G4HCofThisEvent* ){
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXePMTSD::clear(){
}

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXePMTSD::DrawAll(){
} 

//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
void LXePMTSD::PrintAll(){
}