/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/RecoEgamma/EgammaPhotonAlgos/src/InOutConversionSeedFinder.cc

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#include "RecoEgamma/EgammaPhotonAlgos/interface/InOutConversionSeedFinder.h"
#include "RecoEgamma/EgammaPhotonAlgos/interface/ConversionBarrelEstimator.h"
#include "RecoEgamma/EgammaPhotonAlgos/interface/ConversionForwardEstimator.h"

#include "RecoEgamma/EgammaPhotonAlgos/interface/ConversionFastHelix.h"

// Field
//
#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"
// Geometry
//
#include "TrackingTools/TrajectoryParametrization/interface/GlobalTrajectoryParameters.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateTransform.h"
//
//
//

InOutConversionSeedFinder::InOutConversionSeedFinder( const edm::ParameterSet& conf ):
  ConversionSeedFinder( conf ), conf_(conf)  
{
  
  
  // std::cout << " InOutConversionSeedFinder CTOR " << "\n";      
    
  maxNumberOfInOutSeedsPerInputTrack_ =  conf_.getParameter<int>("maxNumOfSeedsInOut");
  //the2ndHitdphi_ = 0.008; 
  the2ndHitdphi_ = 0.01; 
  the2ndHitdzConst_ = 5.;
  the2ndHitdznSigma_ = 2.;
 
  
}



InOutConversionSeedFinder::~InOutConversionSeedFinder() {
 //std::cout << " InOutConversionSeedFinder DTOR " << "\n";
}



void InOutConversionSeedFinder::makeSeeds( const edm::Handle<edm::View<reco::CaloCluster> > &  allBC )  const  {
  

  //std::cout << "  InOutConversionSeedFinder::makeSeeds() " << "\n";
  theSeeds_.clear();
  //std::cout << " Check Calo cluster collection size " << allBC->size() << "\n";  
  bcCollection_= allBC;
  
  
  findLayers();
  
  
  fillClusterSeeds();
  //std::cout << "Built vector of seeds of size  " << theSeeds_.size() <<  "\n" ;
  
  
  theOutInTracks_.clear();
  inputTracks_.clear();
  theFirstMeasurements_.clear();
  
}


void InOutConversionSeedFinder::fillClusterSeeds() const {
  
  std::vector<Trajectory>::const_iterator outInTrackItr;
  
 //std::cout << "  InOutConversionSeedFinder::fillClusterSeeds outInTracks_.size " << theOutInTracks_.size() << "\n";
  //Start looking for seeds for both of the 2 best tracks from the inward tracking
  
  /*
  for(outInTrackItr = theOutInTracks_.begin(); outInTrackItr != theOutInTracks_.end();  ++outInTrackItr) {


   //std::cout << " InOutConversionSeedFinder::fillClusterSeeds out in input track hits " << (*outInTrackItr).foundHits() << "\n";
    DetId tmpId = DetId( (*outInTrackItr).seed().startingState().detId());
    const GeomDet* tmpDet  = this->getMeasurementTracker()->geomTracker()->idToDet( tmpId );
    GlobalVector gv = tmpDet->surface().toGlobal( (*outInTrackItr).seed().startingState().parameters().momentum() );


   //std::cout << " InOutConversionSeedFinder::fillClusterSeed was built from seed position " <<gv   <<  " charge " << (*outInTrackItr).seed().startingState().parameters().charge() << "\n";

    Trajectory::DataContainer m=  outInTrackItr->measurements();
    int nHit=0;
    for (Trajectory::DataContainer::iterator itm = m.begin(); itm != m.end(); ++itm) {
      if ( itm->recHit()->isValid()  ) {
        nHit++;
        //std::cout << nHit << ")  Valid RecHit global position " << itm->recHit()->globalPosition() << " R " <<  itm->recHit()->globalPosition().perp() << " phi " << itm->recHit()->globalPosition().phi() << " eta " << itm->recHit()->globalPosition().eta() << "\n";
      } 

    }

  }

  */


  //Start looking for seeds for both of the 2 best tracks from the inward tracking
  for(outInTrackItr = theOutInTracks_.begin(); outInTrackItr != theOutInTracks_.end();  ++outInTrackItr) {
   //std::cout << " InOutConversionSeedFinder::fillClusterSeeds out in input track hits " << (*outInTrackItr).foundHits() << "\n";
    nSeedsPerInputTrack_=0;    
    
    //Find the first valid hit of the track
    // Measurements are ordered according to the direction in which the trajectories were built
    std::vector<TrajectoryMeasurement> measurements = (*outInTrackItr).measurements();
    
    std::vector<const DetLayer*> allLayers=layerList();
    
    //std::cout << "  InOutConversionSeedFinder::fill clusterSeed allLayers.size " <<  allLayers.size() << "\n";
    for(unsigned int i = 0; i < allLayers.size(); ++i) {
      //std::cout <<  " allLayers " << allLayers[i] << "\n"; 
      printLayer(i);
     }
    
    
    
    std::vector<const DetLayer*> myLayers;
    myLayers.clear();    
    std::vector<TrajectoryMeasurement>::reverse_iterator measurementItr;    
    std::vector<TrajectoryMeasurement*> myItr;
    // TrajectoryMeasurement* myPointer=0;
    myPointer=0;
    //std::cout << "  InOutConversionSeedFinder::fillClusterSeeds measurements.size " << measurements.size() <<"\n";
    
    for(measurementItr = measurements.rbegin() ; measurementItr != measurements.rend();  ++measurementItr) {
    

      if( (*measurementItr).recHit()->isValid()) {
        
        //std::cout << "  InOutConversionSeedFinder::fillClusterSeeds measurement on  layer  " << measurementItr->layer() <<   " " <<&(*measurementItr) <<  " position " << measurementItr->recHit()->globalPosition() <<   " R " << sqrt( measurementItr->recHit()->globalPosition().x()*measurementItr->recHit()->globalPosition().x() + measurementItr->recHit()->globalPosition().y()*measurementItr->recHit()->globalPosition().y() ) << " Z " << measurementItr->recHit()->globalPosition().z() << " phi " <<  measurementItr->recHit()->globalPosition().phi() << "\n";
        
        
        myLayers.push_back( measurementItr->layer() ) ; 
        myItr.push_back( &(*measurementItr) );
        
        
      }
    }
    
    
    
   //std::cout << " InOutConversionSeedFinder::fillClusterSeed myLayers.size " <<  myLayers.size() << "\n";
    //    for( unsigned int i = 0; i < myLayers.size(); ++i) {
    // }
    
    
    if ( myItr.size()==0 ) {
      //std::cout << "HORRENDOUS ERROR!  No meas on track!" << "\n";
    }      
    unsigned int ilayer;
    for(ilayer = 0; ilayer < allLayers.size(); ++ilayer) {
      //std::cout <<  " allLayers in the search loop  " << allLayers[ilayer] <<  " " << myLayers[0] <<  "\n"; 
      if ( allLayers[ilayer] == myLayers[0]) {
        
        myPointer=myItr[0];
        
        //std::cout <<  " allLayers in the search loop   allLayers[ilayer] == myLayers[0])  " << allLayers[ilayer] <<  " " << myLayers[0] <<  " myPointer " << myPointer << "\n"; 
        
        //std::cout  << "Layer " << ilayer << "  contains the first valid measurement " << "\n";        
        printLayer(ilayer);     
        
        if ( (myLayers[0])->location() == GeomDetEnumerators::barrel ) {
          //      const BarrelDetLayer * barrelLayer = dynamic_cast<const BarrelDetLayer*>(myLayers[0]);
         //std::cout << " InOutConversionSeedFinder::fillClusterSeeds  **** firstHit found in Barrel on layer " << ilayer  << " R= " << barrelLayer->specificSurface().radius() <<   "\n";
        } else {
          //const ForwardDetLayer * forwardLayer = dynamic_cast<const ForwardDetLayer*>(myLayers[0]);
         //std::cout << " InOutwardConversionSeedFinder::fillClusterSeeds  **** firstHit found in Forw on layer " << ilayer  << " Z= " << forwardLayer->specificSurface().position().z() <<  "\n";
        }
        
        
        break;
        
      } else if ( allLayers[ilayer] == myLayers[1] )  {
        myPointer=myItr[1];
        
        //std::cout <<  " allLayers in the search loop   allLayers[ilayer] == myLayers[1])  " << allLayers[ilayer] <<  " " << myLayers[1] <<  " myPointer " << myPointer << "\n"; 
        
        //std::cout << "Layer " << ilayer << "  contains the first innermost  valid measurement " << "\n";      
        if ( (myLayers[1])->location() == GeomDetEnumerators::barrel ) {
          //      const BarrelDetLayer * barrelLayer = dynamic_cast<const BarrelDetLayer*>(myLayers[1]);
         //std::cout << " InOutConversionSeedFinder::fillClusterSeeds  **** 2ndHit found in Barrel on layer " << ilayer  << " R= " << barrelLayer->specificSurface().radius() <<   "\n"; 
        } else {
          //const ForwardDetLayer * forwardLayer = dynamic_cast<const ForwardDetLayer*>(myLayers[1]);
         //std::cout << " InOutwardConversionSeedFinder::fillClusterSeeds  ****  2ndHitfound on forw layer " << ilayer  << " Z= " << forwardLayer->specificSurface().position().z() <<  "\n";
        }
        
        
        
        break;
        
      }
    }
    
    
    
    if(ilayer == allLayers.size()) {
     //std::cout << "InOutConversionSeedFinder::fillClusterSeeds ERROR could not find layer on list" <<  "\n"; 
      return;
    }
    
    //PropagatorWithMaterial reversePropagator(oppositeToMomentum, 0.000511, &(*theMF_) );
    FreeTrajectoryState * fts = myPointer->updatedState().freeTrajectoryState();
    
   //std::cout << " InOutConversionSeedFinder::fillClusterSeeds First FTS charge " << fts->charge() << " Position " << fts->position() << " momentum " << fts->momentum() << " R " << sqrt(fts->position().x()*fts->position().x() + fts->position().y()* fts->position().y() ) << " Z " << fts->position().z() << " phi " << fts->position().phi() << " fts parameters " << fts->parameters() << "\n";
    
    
    while (ilayer > 0) {
      
      //std::cout << " InOutConversionSeedFinder::fillClusterSeeds looking for 2nd seed from layer " << ilayer << "\n";
      
      //   if ( (allLayers[ilayer])->location() == GeomDetEnumerators::barrel ) {const BarrelDetLayer * barrelLayer = dynamic_cast<const BarrelDetLayer*>(allLayers[ilayer]);
      //std::cout <<  " InOutConversionSeedFinder::fillClusterSeeds  ****  Barrel on layer " << ilayer  << " R= " << barrelLayer->specificSurface().radius() <<  "\n";     
      // } else {
        //const ForwardDetLayer * forwardLayer = dynamic_cast<const ForwardDetLayer*>(allLayers[ilayer]);
        //std::cout <<  " InOutConversionSeedFinder::fillClusterSeeds  ****  Forw on layer " << ilayer  << " Z= " << forwardLayer->specificSurface().position().z() << "\n";
      //      }
      
     
     const DetLayer * previousLayer = allLayers[ilayer];
     TrajectoryStateOnSurface  stateAtPreviousLayer;
     //std::cout << " InOutConversionSeedFinder::fillClusterSeeds previousLayer->surface() position before  " <<allLayers[ilayer] << " " <<  previousLayer->surface().position() << " layer location " << previousLayer->location() << "\n";   
     // Propagate to the previous layer
     // The present layer is actually included in the loop so that a partner can be searched for
     // Applying the propagator to the same layer does not do any harm. It simply does nothing
     
     //     const Propagator& newProp=thePropagatorOppositeToMomentum_;  
     //std::cout << " InOutConversionSeedFinder::fillClusterSeeds reversepropagator direction " << thePropagatorOppositeToMomentum_->propagationDirection()  << "\n";
     if (ilayer-1>0) { 
       
       if ( allLayers[ilayer] == myLayers[0] ) {
         //std::cout << " innermost hit R " << myPointer->recHit()->globalPosition().perp() << " Z " << myPointer->recHit()->globalPosition().z() << " phi " <<myPointer->recHit()->globalPosition().phi() << "\n";
         //std::cout << " surface R " << theTrackerGeom_->idToDet(  myPointer->recHit() ->geographicalId())->surface().position().perp() <<  " Z " <<  theTrackerGeom_->idToDet(  myPointer->recHit() ->geographicalId())->surface().position().z() << " phi " << theTrackerGeom_->idToDet(  myPointer->recHit() ->geographicalId())->surface().position().phi() << "\n";
         
         stateAtPreviousLayer= thePropagatorOppositeToMomentum_->propagate(*fts,   theTrackerGeom_->idToDet(  myPointer->recHit() ->geographicalId())->surface()   );
         
       } else {
         
         stateAtPreviousLayer= thePropagatorOppositeToMomentum_->propagate(*fts, previousLayer->surface() );
         //std::cout << " InOutConversionSeedFinder::fillClusterSeeds previousLayer->surface() position after " << previousLayer->surface().position() << " layer location " << previousLayer->location() <<   "\n";
         
       }
       
     } else if ( ilayer-1==0) {
       
       
       
       //stateAtPreviousLayer= thePropagatorOppositeToMomentum_->propagate(*fts,   theTrackerGeom_->idToDet(  myPointer->recHit() ->geographicalId())->surface()   );
       stateAtPreviousLayer= thePropagatorOppositeToMomentum_->propagate(*fts, previousLayer->surface() );      
       
     }
     
     if(!stateAtPreviousLayer.isValid()) {
       //std::cout << "InOutConversionSeedFinder::fillClusterSeeds ERROR:could not propagate back to layer "  << ilayer << "\n";
     } else {
       //std::cout << "InOutConversionSeedFinder::fillClusterSeeds  stateAtPreviousLayer is valid.  Propagating back to layer "  << ilayer << "\n";
       //std::cout << "InOutConversionSeedFinder::fillClusterSeeds stateAtPreviousLayer R  " << stateAtPreviousLayer.globalPosition().perp()  << " Z " << stateAtPreviousLayer.globalPosition().z() << " phi " <<  stateAtPreviousLayer.globalPosition().phi() << "\n";
       
       startSeed(fts,  stateAtPreviousLayer, -1, ilayer ); 
       
       
     }      
     
     --ilayer;
     
    }
    
    if ( ilayer == 0) {
      

      //     if ( (allLayers[ilayer])->location() == GeomDetEnumerators::barrel ) {const BarrelDetLayer * barrelLayer = dynamic_cast<const BarrelDetLayer*>(allLayers[ilayer]);
      // //std::cout <<  " InOutConversionSeedFinder::fillClusterSeeds  ****  Barrel on layer " << ilayer  << " R= " << barrelLayer->specificSurface().radius() <<  "\n";     
      // } else {
      //const ForwardDetLayer * forwardLayer = dynamic_cast<const ForwardDetLayer*>(allLayers[ilayer]);
       //std::cout <<  " InOutConversionSeedFinder::fillClusterSeeds  ****  Forw on layer " << ilayer  << " Z= " << forwardLayer->specificSurface().position().z() << "\n";
      // }
     const DetLayer * previousLayer = allLayers[ilayer];
     TrajectoryStateOnSurface  stateAtPreviousLayer;
     stateAtPreviousLayer= thePropagatorOppositeToMomentum_->propagate(*fts, previousLayer->surface() );

     if(!stateAtPreviousLayer.isValid()) {
       //std::cout << "InOutConversionSeedFinder::fillClusterSeeds ERROR:could not propagate back to layer "  << ilayer << "\n";
     } else {
       //std::cout << "InOutConversionSeedFinder::fillClusterSeeds  stateAtPreviousLayer is valid.  Propagating back to layer "  << ilayer << "\n";
       //std::cout << "InOutConversionSeedFinder::fillClusterSeeds stateAtPreviousLayer R  " << stateAtPreviousLayer.globalPosition().perp()  << " Z " << stateAtPreviousLayer.globalPosition().z() << " phi " <<  stateAtPreviousLayer.globalPosition().phi() << "\n";
       
       startSeed(fts,  stateAtPreviousLayer, -1, ilayer ); 
     }     
       
     
   }

    
    
    
  }  // End loop over Out In tracks
  
  
  
}



void InOutConversionSeedFinder::startSeed( FreeTrajectoryState * fts, const TrajectoryStateOnSurface & stateAtPreviousLayer, int charge, int ilayer  )  const {
  
  //std::cout << "InOutConversionSeedFinder::startSeed ilayer " << ilayer <<  "\n";
  // Get a list of basic clusters that are consistent with a track 
  // starting at the assumed conversion point with opp. charge to the 
  // inward track.  Loop over these basic clusters.
  track2Charge_ = charge*fts->charge();
  std::vector<const reco::CaloCluster*> bcVec;
 //std::cout << "InOutConversionSeedFinder::startSeed charge assumed for the in-out track  " << track2Charge_ <<  "\n";
  
  Geom::Phi<float> theConvPhi( stateAtPreviousLayer.globalPosition().phi());
 //std::cout << "InOutConversionSeedFinder::startSeed  stateAtPreviousLayer phi " << stateAtPreviousLayer.globalPosition().phi() << " R " <<  stateAtPreviousLayer.globalPosition().perp() << " Z " << stateAtPreviousLayer.globalPosition().z() << "\n";
  
  bcVec = getSecondCaloClusters(stateAtPreviousLayer.globalPosition(),track2Charge_);
  
  std::vector<const reco::CaloCluster*>::iterator bcItr;
 //std::cout << "InOutConversionSeedFinder::startSeed bcVec.size " << bcVec.size() << "\n";
  
  // debug
  //  for(bcItr = bcVec.begin(); bcItr != bcVec.end(); ++bcItr) {
  //  //std::cout << "InOutConversionSeedFinder::startSeed list of  bc eta " << (*bcItr)->position().eta() << " phi " << (*bcItr)->position().phi() << " x " << (*bcItr)->position().x() << " y " << (*bcItr)->position().y() << " z " << (*bcItr)->position().z() << "\n";
  // }
  

  for(bcItr = bcVec.begin(); bcItr != bcVec.end(); ++bcItr) {
    
    theSecondBC_ = **bcItr;
    GlobalPoint bcPos((theSecondBC_.position()).x(),
                      (theSecondBC_.position()).y(),
                      (theSecondBC_.position()).z());
    
   //std::cout << "InOutConversionSeedFinder::startSeed for  bc position x " << bcPos.x() << " y " <<  bcPos.y() << " z  " <<  bcPos.z() << " eta " <<  bcPos.eta() << " phi " <<  bcPos.phi() << "\n";
    GlobalVector dir = stateAtPreviousLayer.globalDirection();
    GlobalPoint back1mm = stateAtPreviousLayer.globalPosition();
   //std::cout << "InOutConversionSeedFinder::startSeed   stateAtPreviousLayer.globalPosition() " << back1mm << "\n";
    
    back1mm -= dir.unit()*0.1;
    //std::cout << " InOutConversionSeedFinder:::startSeed going to make the helix using back1mm " << back1mm <<"\n";
    ConversionFastHelix helix(bcPos, stateAtPreviousLayer.globalPosition(), back1mm, &(*theMF_));
    helix.stateAtVertex();    
    
    //std::cout << " InOutConversionSeedFinder:::startSeed helix status " <<helix.isValid() << std::endl; 
    if ( !helix.isValid()  ) continue;
    findSeeds(stateAtPreviousLayer, helix.stateAtVertex().transverseCurvature(), ilayer);
    
    
  }
  
  
  
}



std::vector<const reco::CaloCluster*> InOutConversionSeedFinder::getSecondCaloClusters(const GlobalPoint & conversionPosition, float charge) const {
  
  
  std::vector<const reco::CaloCluster*> result;
  
 //std::cout << "InOutConversionSeedFinder::getSecondCaloClusters" <<  "\n"; 
  
  Geom::Phi<float> theConvPhi(conversionPosition.phi() );

  for (unsigned i = 0; i < bcCollection_->size(); ++i ) {
    
    Geom::Phi<float> theBcPhi( bcCollection_->ptrAt(i)->position().phi()   );
   //std::cout<< "InOutConversionSeedFinder::getSecondCaloClusters  BC energy " <<  bcCollection_->ptrAt(i)->energy() << " Calo cluster phi " << theBcPhi << " " <<  bcCollection_->ptrAt(i)->position().phi()<<  " theConvPhi " << theConvPhi << "\n";
    
    // Require phi of cluster to be consistent with the conversion 
    // position and the track charge
    
    
    if (fabs(theBcPhi-theConvPhi ) < .5 &&
        ((charge<0 && theBcPhi-theConvPhi >-.5) || 
         (charge>0 && theBcPhi-theConvPhi <.5))){
      
      //result.push_back(&(*bcItr));

      result.push_back(&(*(bcCollection_->ptrAt(i))  ));

    }
    
    
    
    
  }
  
  
  
  return result;
  
  
}



void InOutConversionSeedFinder::findSeeds(const TrajectoryStateOnSurface & startingState,
                                          float transverseCurvature, 
                                          unsigned int startingLayer) const {
  
  
  std::vector<const DetLayer*> allLayers=layerList();
 //std::cout << "InOutConversionSeedFinder::findSeeds starting forward propagation from  startingLayer " << startingLayer <<  "\n"; 
  
  
  // create error matrix
  AlgebraicSymMatrix55 m = AlgebraicMatrixID();
  m(0,0) = 0.1; m(1,1) = 0.0001 ; m(2,2) = 0.0001 ;
  m(3,3) = 0.0001 ; m(4,4) = 0.001;

  // Make an FTS consistent with the start point, start direction and curvature
  FreeTrajectoryState fts(GlobalTrajectoryParameters(startingState.globalPosition(), 
                                                     startingState.globalDirection(),
                                                     double(transverseCurvature), 0, &(*theMF_) ),
                          CurvilinearTrajectoryError(m));
  if (fts.momentum().mag2() == 0){
    edm::LogWarning("FailedToInitiateSeeding")<< " initial FTS has a zero momentum, probably because of the zero field.  ";
    return;
  }
 //std::cout << " InOutConversionSeedFinder::findSeeds startingState R "<< startingState.globalPosition().perp() << " Z " << startingState.globalPosition().z() << " phi " <<  startingState.globalPosition().phi() <<  " position " << startingState.globalPosition() << "\n";
 //std::cout << " InOutConversionSeedFinder::findSeeds Initial FTS charge " << fts.charge() << " curvature " <<  transverseCurvature << "\n";  
 //std::cout << " InOutConversionSeedFinder::findSeeds Initial FTS parameters " << fts <<  "\n"; 
    
  
  //float dphi = 0.01;
  float dphi = 0.03;
  float zrange = 5.;
  for( unsigned int ilayer = startingLayer; ilayer <= startingLayer+1 && (ilayer < allLayers.size()-2); ++ilayer) {
    const DetLayer * layer = allLayers[ilayer];
    
    
    
    //    if ( layer->location() == GeomDetEnumerators::barrel ) {const BarrelDetLayer * barrelLayer = dynamic_cast<const BarrelDetLayer*>(layer);
    // //std::cout << "InOutConversionSeedFinder::findSeeds  ****  Barrel on layer " << ilayer  << " R= " << barrelLayer->specificSurface().radius() <<  "\n";     
    // } else {
    // const ForwardDetLayer * forwardLayer = dynamic_cast<const ForwardDetLayer*>(layer);
    // }
    // // end debug
    
    

    MeasurementEstimator * newEstimator=0;
    if (layer->location() == GeomDetEnumerators::barrel ) {
     //std::cout << "InOutConversionSeedFinder::findSeeds Barrel ilayer " << ilayer <<  "\n"; 
      newEstimator = new ConversionBarrelEstimator(-dphi, dphi, -zrange, zrange);
    }
    else {
     //std::cout << "InOutConversionSeedFinder::findSeeds Forward  ilayer " << ilayer <<  "\n"; 
      newEstimator = new ConversionForwardEstimator(-dphi, dphi, 15.);
    }
    
    
    theFirstMeasurements_.clear();
    // Get measurements compatible with the FTS and Estimator
    TSOS tsos(fts, layer->surface() );
    
   //std::cout << "InOutConversionSeedFinder::findSeed propagationDirection " << int(thePropagatorAlongMomentum_->propagationDirection() ) << "\n";               
    LayerMeasurements theLayerMeasurements_(this->getMeasurementTracker() );

    theFirstMeasurements_ = theLayerMeasurements_.measurements( *layer, tsos, *thePropagatorAlongMomentum_, *newEstimator);
    
    delete newEstimator;
    //std::cout <<  "InOutConversionSeedFinder::findSeeds  Found " << theFirstMeasurements_.size() << " first hits" << "\n";
    
    if ( theFirstMeasurements_.size() == 1 ) {      // only dummy hit found: start finding the seed from the innermost hit of the OutIn track

      
      GlobalPoint bcPos((theSecondBC_.position()).x(),(theSecondBC_.position()).y(),(theSecondBC_.position()).z());
      GlobalVector dir = startingState.globalDirection();
      GlobalPoint back1mm = myPointer->recHit()->globalPosition();
      
      back1mm -= dir.unit()*0.1;
      //std::cout << " InOutConversionSeedFinder:::findSeeds going to make the helix using back1mm " << back1mm << "\n";
      ConversionFastHelix helix(bcPos,  myPointer->recHit()->globalPosition(), back1mm, &(*theMF_));
      
      helix.stateAtVertex();
      //std::cout << " InOutConversionSeedFinder:::findSeeds helix status " <<helix.isValid() << std::endl; 
      if ( !helix.isValid()  ) continue;
      
      track2InitialMomentum_= helix.stateAtVertex().momentum();
                  
      // Make a new FTS
      FreeTrajectoryState newfts(GlobalTrajectoryParameters(
                                                            myPointer->recHit()->globalPosition(), startingState.globalDirection(),
                                                            helix.stateAtVertex().transverseCurvature(), 0, &(*theMF_)), 
                                 CurvilinearTrajectoryError(m));
      
      
      completeSeed(*myPointer, newfts,  thePropagatorAlongMomentum_, ilayer+1);
      completeSeed(*myPointer, newfts,  thePropagatorAlongMomentum_, ilayer+2);
      
      
    } else { 
      
      
      
      //Loop over compatible hits
      int mea=0;
      for(std::vector<TrajectoryMeasurement>::iterator tmItr = theFirstMeasurements_.begin(); tmItr !=theFirstMeasurements_.end();  ++tmItr) {
        
        mea++;
        
        
        if (tmItr->recHit()->isValid() ) {
          // Make a new helix as in fillClusterSeeds() but using the hit position
          //std::cout << "InOutConversionSeedFinder::findSeeds hit  R " << tmItr->recHit()->globalPosition().perp() << " Z " <<  tmItr->recHit()->globalPosition().z() << " " <<  tmItr->recHit()->globalPosition() << "\n";
          GlobalPoint bcPos((theSecondBC_.position()).x(),(theSecondBC_.position()).y(),(theSecondBC_.position()).z());
          GlobalVector dir = startingState.globalDirection();
          GlobalPoint back1mm = tmItr->recHit()->globalPosition();
          
          back1mm -= dir.unit()*0.1;
          //std::cout << " InOutConversionSeedFinder:::findSeeds going to make the helix using back1mm " << back1mm << "\n";
          ConversionFastHelix helix(bcPos,  tmItr->recHit()->globalPosition(), back1mm, &(*theMF_));
          
          helix.stateAtVertex();
          //std::cout << " InOutConversionSeedFinder:::findSeeds helix status " <<helix.isValid() << std::endl; 
          if ( !helix.isValid()  ) continue;
          
          track2InitialMomentum_= helix.stateAtVertex().momentum();
          
          //std::cout << "InOutConversionSeedFinder::findSeeds Updated estimatedPt = " << helix.stateAtVertex().momentum().perp()  << " curvature "  << helix.stateAtVertex().transverseCurvature() << "\n";
          //     << ", bcet = " << theBc->Et() 
          //     << ", estimatedPt/bcet = " << estimatedPt/theBc->Et() << endl;
          
          
          // Make a new FTS
          FreeTrajectoryState newfts(GlobalTrajectoryParameters(
                                                                tmItr->recHit()->globalPosition(), startingState.globalDirection(),
                                                                helix.stateAtVertex().transverseCurvature(), 0, &(*theMF_)), 
                                     CurvilinearTrajectoryError(m));
          
          //std::cout <<  "InOutConversionSeedFinder::findSeeds  new FTS charge " << newfts.charge() << "\n";
          
          
          /*
          // Soome diagnostic output
          // may be useful - comparission of the basic cluster position 
          // with the ecal impact position of the track
          TrajectoryStateOnSurface stateAtECAL
          = forwardPropagator.propagate(newfts, ECALSurfaces::barrel());
          if (!stateAtECAL.isValid() || abs(stateAtECAL.globalPosition().eta())>1.479) {
          if (startingState.globalDirection().eta() > 0.) {
          stateAtECAL = forwardPropagator.propagate(newfts, 
          ECALSurfaces::positiveEtaEndcap());
          } else {
          stateAtECAL = forwardPropagator.propagate(newfts, 
          ECALSurfaces::negativeEtaEndcap());
          }
          }
          GlobalPoint ecalImpactPosition = stateAtECAL.isValid() ? stateAtECAL.globalPosition() : GlobalPoint(0.,0.,0.);
          cout << "Projected fts positon at ECAL surface: " << 
          ecalImpactPosition << " bc position: " << theBc->Position() << endl;
          */
          
          
          completeSeed(*tmItr, newfts,  thePropagatorAlongMomentum_, ilayer+1);
          completeSeed(*tmItr, newfts,  thePropagatorAlongMomentum_, ilayer+2);
          
          
        }
        
      }
      
    }    
    
    
  }
  
  
  
}





void InOutConversionSeedFinder::completeSeed(const TrajectoryMeasurement & m1,
                                             FreeTrajectoryState & fts, const Propagator* propagator, int ilayer) const {
  
 //std::cout<<  "InOutConversionSeedFinder::completeSeed ilayer " << ilayer <<  "\n";
  // A seed is made from 2 Trajectory Measuremennts.  The 1st is the input
  // argument m1.  This routine looks for the 2nd measurement in layer ilayer
  // Begin by making a new much stricter MeasurementEstimator based on the
  // position errors of the 1st hit.
  printLayer(ilayer);
  
  MeasurementEstimator * newEstimator;
  std::vector<const DetLayer*> allLayers=layerList();
  const DetLayer * layer = allLayers[ilayer];
  
  //  if ( layer->location() == GeomDetEnumerators::barrel ) {const BarrelDetLayer * barrelLayer = dynamic_cast<const BarrelDetLayer*>(layer);
  // //std::cout << "InOutConversionSeedFinder::completeSeed  ****  Barrel on layer " << ilayer  << " R= " << barrelLayer->specificSurface().radius() <<  "\n";     
  // } else {
  // const ForwardDetLayer * forwardLayer = dynamic_cast<const ForwardDetLayer*>(layer);
  //  //std::cout << "InOutConversionSeedFinder::completeSeed ****  Forw on layer " << ilayer  << " Z= " << forwardLayer->specificSurface().position().z() <<  "\n"; 
  
  


  if (layer->location() == GeomDetEnumerators::barrel ) {
    
    float dz = sqrt(the2ndHitdznSigma_*the2ndHitdznSigma_*m1.recHit()->globalPositionError().czz()
                    + the2ndHitdzConst_*the2ndHitdzConst_);
    newEstimator = new ConversionBarrelEstimator(-the2ndHitdphi_, the2ndHitdphi_, -dz, dz);
    
  }
  else {
    float m1dr = sqrt(m1.recHit()->localPositionError().yy());
    float dr = sqrt(the2ndHitdznSigma_*the2ndHitdznSigma_*m1dr*m1dr
                    + the2ndHitdzConst_*the2ndHitdznSigma_);
    
    newEstimator =  new ConversionForwardEstimator(-the2ndHitdphi_, the2ndHitdphi_, dr);
  }
  

 //std::cout << "InOutConversionSeedFinder::completeSeed fts For the TSOS " << fts << "\n";   
  
  TSOS tsos(fts, layer->surface() );

  if ( !tsos.isValid() ) {
   //std::cout  << "InOutConversionSeedFinder::completeSeed TSOS is not valid " <<  "\n"; 
  } 

 //std::cout << "InOutConversionSeedFinder::completeSeed TSOS " << tsos << "\n";   
 //std::cout << "InOutConversionSeedFinder::completeSeed propagationDirection  " << int(propagator->propagationDirection() ) << "\n";               
 //std::cout << "InOutConversionSeedFinder::completeSeed pointer to estimator " << newEstimator << "\n";
  LayerMeasurements theLayerMeasurements_(this->getMeasurementTracker() );
  std::vector<TrajectoryMeasurement> measurements = theLayerMeasurements_.measurements( *layer, tsos, *propagator, *newEstimator);
 //std::cout << "InOutConversionSeedFinder::completeSeed Found " << measurements.size() << " second hits " <<  "\n"; 
  delete newEstimator;
  
  for(unsigned int i = 0; i < measurements.size(); ++i) {
    if( measurements[i].recHit()->isValid()  ) {
      createSeed(m1, measurements[i]);
    }
  }
  
  
  
  
  
  
}



void InOutConversionSeedFinder::createSeed(const TrajectoryMeasurement & m1,  const TrajectoryMeasurement & m2) const {
  
 //std::cout << "InOutConversionSeedFinder::createSeed " << "\n";

  if (  m1.predictedState().isValid() ) {  
  GlobalTrajectoryParameters newgtp(  m1.recHit()->globalPosition(), track2InitialMomentum_, track2Charge_, &(*theMF_) );
  CurvilinearTrajectoryError errors = m1.predictedState().curvilinearError();
  FreeTrajectoryState fts(newgtp, errors);

  TrajectoryStateOnSurface state1 = thePropagatorAlongMomentum_->propagate(fts,  m1.recHit()->det()->surface());
  
  /*
   //std::cout << "hit surface " <<  m1.recHit()->det()->surface().position() << "\n";
   //std::cout << "prop to " << typeid( m1.recHit()->det()->surface() ).name() <<"\n";
   //std::cout << "prop to first hit " << state1 << "\n"; 
   //std::cout << "update to " <<  m1.recHit()->globalPosition() << "\n";
  */
  
  
  
  
  if ( state1.isValid() ) {
    
    TrajectoryStateOnSurface updatedState1 = theUpdator_.update(state1,  *m1.recHit() );
    
    if ( updatedState1.isValid() ) {
      
      TrajectoryStateOnSurface state2 = thePropagatorAlongMomentum_->propagate(*updatedState1.freeTrajectoryState(),  m2.recHit()->det()->surface());
      
      if ( state2.isValid() ) {
        
        TrajectoryStateOnSurface updatedState2 = theUpdator_.update(state2, *m2.recHit() );
        TrajectoryMeasurement meas1(state1, updatedState1,  m1.recHit()  , m1.estimate(), m1.layer());
        TrajectoryMeasurement meas2(state2, updatedState2,  m2.recHit()  , m2.estimate(), m2.layer());
        
        edm::OwnVector<TrackingRecHit> myHits;
        myHits.push_back(meas1.recHit()->hit()->clone());
        myHits.push_back(meas2.recHit()->hit()->clone());
        
        //std::cout << "InOutConversionSeedFinder::createSeed new seed " << "\n";
        if ( nSeedsPerInputTrack_ >= maxNumberOfInOutSeedsPerInputTrack_ ) return;
        

        
        PTrajectoryStateOnDet const & ptsod= trajectoryStateTransform::persistentState(state2, meas2.recHit()->hit()->geographicalId().rawId()  );
        //std::cout << "  InOutConversionSeedFinder::createSeed New seed parameters " << state2 << "\n";
       
        
       
        theSeeds_.push_back(TrajectorySeed( ptsod, myHits, alongMomentum ));
        nSeedsPerInputTrack_++;
       
        //std::cout << "InOutConversionSeedFinder::createSeed New seed hit 1 R " << m1.recHit()->globalPosition().perp() << "\n";
        //std::cout << "InOutConversionSeedFinder::createSeed New seed hit 2 R " << m2.recHit()->globalPosition().perp() << "\n";       
        
      }
    }
  }
  }

  
}