/data/refman/pasoursint/CMSSW_5_2_7_hltpatch1/src/RecoParticleFlow/PFProducer/src/PFPhotonAlgo.cc

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//
// Original Authors: Fabian Stoeckli: fabian.stoeckli@cern.ch
//                   Nicholas Wardle: nckw@cern.ch
//                   Rishi Patel rpatel@cern.ch
//

#include "RecoParticleFlow/PFProducer/interface/PFPhotonAlgo.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFClusterFwd.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementSuperCluster.h"
#include "DataFormats/EgammaReco/interface/ElectronSeed.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHit.h"
#include "DataFormats/EcalDetId/interface/EBDetId.h"
#include "DataFormats/EcalDetId/interface/EEDetId.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFEnergyCalibration.h"
#include "RecoEcal/EgammaCoreTools/interface/Mustache.h"
#include "DataFormats/CaloRecHit/interface/CaloCluster.h"
#include "DataFormats/CaloRecHit/interface/CaloClusterFwd.h"
#include "DataFormats/Math/interface/deltaPhi.h"
#include "DataFormats/Math/interface/deltaR.h"
#include <TFile.h>
#include <iomanip>
#include <algorithm>
#include <TMath.h>
using namespace std;
using namespace reco;


PFPhotonAlgo::PFPhotonAlgo(std::string mvaweightfile,  
                           double mvaConvCut, 
                           bool useReg,
                           std::string X0_Map,
                           const reco::Vertex& primary,
                           const boost::shared_ptr<PFEnergyCalibration>& thePFEnergyCalibration,
                           double sumPtTrackIsoForPhoton,
                           double sumPtTrackIsoSlopeForPhoton
                           ) : 
  isvalid_(false), 
  verbosityLevel_(Silent), 
  MVACUT(mvaConvCut),
  useReg_(useReg),
  thePFEnergyCalibration_(thePFEnergyCalibration),
  sumPtTrackIsoForPhoton_(sumPtTrackIsoForPhoton),
  sumPtTrackIsoSlopeForPhoton_(sumPtTrackIsoSlopeForPhoton)
{  
    primaryVertex_=primary;  
    //Book MVA  
    tmvaReader_ = new TMVA::Reader("!Color:Silent");  
    tmvaReader_->AddVariable("del_phi",&del_phi);  
    tmvaReader_->AddVariable("nlayers", &nlayers);  
    tmvaReader_->AddVariable("chi2",&chi2);  
    tmvaReader_->AddVariable("EoverPt",&EoverPt);  
    tmvaReader_->AddVariable("HoverPt",&HoverPt);  
    tmvaReader_->AddVariable("track_pt", &track_pt);  
    tmvaReader_->AddVariable("STIP",&STIP);  
    tmvaReader_->AddVariable("nlost", &nlost);  
    tmvaReader_->BookMVA("BDT",mvaweightfile.c_str());  

    //Material Map
    TFile *XO_File = new TFile(X0_Map.c_str(),"READ");
    X0_sum=(TH2D*)XO_File->Get("TrackerSum");
    X0_inner = (TH2D*)XO_File->Get("Inner");
    X0_middle = (TH2D*)XO_File->Get("Middle");
    X0_outer = (TH2D*)XO_File->Get("Outer");
    
}

void PFPhotonAlgo::RunPFPhoton(const reco::PFBlockRef&  blockRef,
                               std::vector<bool>& active,
                               std::auto_ptr<PFCandidateCollection> &pfCandidates,
                               std::vector<reco::PFCandidatePhotonExtra>& pfPhotonExtraCandidates,
                               std::vector<reco::PFCandidate> 
                               &tempElectronCandidates
){
  
  //std::cout<<" calling RunPFPhoton "<<std::endl;
  
  /*      For now we construct the PhotonCandidate simply from 
          a) adding the CORRECTED energies of each participating ECAL cluster
          b) build the energy-weighted direction for the Photon
  */


  // define how much is printed out for debugging.
  // ... will be setable via CFG file parameter
  verbosityLevel_ = Chatty;          // Chatty mode.
  

  // loop over all elements in the Block
  const edm::OwnVector< reco::PFBlockElement >&          elements         = blockRef->elements();
  edm::OwnVector< reco::PFBlockElement >::const_iterator ele              = elements.begin();
  std::vector<bool>::const_iterator                      actIter          = active.begin();
  PFBlock::LinkData                                      linkData         = blockRef->linkData();
  bool                                                   isActive         = true;


  if(elements.size() != active.size()) {
    // throw excpetion...
    //std::cout<<" WARNING: Size of collection and active-vectro don't agree!"<<std::endl;
    return;
  }
  
  // local vecotr to keep track of the indices of the 'elements' for the Photon candidate
  // once we decide to keep the candidate, the 'active' entriesd for them must be set to false
  std::vector<unsigned int> elemsToLock;
  elemsToLock.resize(0);
  
  for( ; ele != elements.end(); ++ele, ++actIter ) {

    // if it's not a SuperCluster, go to the next element
    if( !( ele->type() == reco::PFBlockElement::SC ) ) continue;
    
    // Photon kienmatics, will be updated for each identified participating element
    float photonEnergy_        =   0.;
    float photonX_             =   0.;
    float photonY_             =   0.;
    float photonZ_             =   0.;
    float RawEcalEne           =   0.;

    // Total pre-shower energy
    float ps1TotEne      = 0.;
    float ps2TotEne      = 0.;
    
    bool hasConvTrack=false;  
    bool hasSingleleg=false;  
    std::vector<unsigned int> AddClusters(0);  
    std::vector<unsigned int> IsoTracks(0);  
    std::multimap<unsigned int, unsigned int>ClusterAddPS1;  
    std::multimap<unsigned int, unsigned int>ClusterAddPS2;
    std::vector<reco::TrackRef>singleLegRef;
    std::vector<float>MVA_values(0);
    std::vector<float>MVALCorr;
    std::vector<const CaloCluster*>PFClusters;
    reco::ConversionRefVector ConversionsRef_;
    isActive = *(actIter);
    //cout << " Found a SuperCluster.  Energy " ;
    const reco::PFBlockElementSuperCluster *sc = dynamic_cast<const reco::PFBlockElementSuperCluster*>(&(*ele));
    //std::cout << sc->superClusterRef()->energy () << " Track/Ecal/Hcal Iso " << sc->trackIso()<< " " << sc->ecalIso() ;
    //std::cout << " " << sc->hcalIso() <<std::endl;
    if (!(sc->fromPhoton()))continue;

    // check the status of the SC Element... 
    // ..... I understand it should *always* be active, since PFElectronAlgo does not touch this (yet?) RISHI: YES
    if( !isActive ) {
      //std::cout<<" SuperCluster is NOT active.... "<<std::endl;
      continue;
    }
    elemsToLock.push_back(ele-elements.begin()); //add SC to elements to lock
    // loop over its constituent ECAL cluster
    std::multimap<double, unsigned int> ecalAssoPFClusters;
    blockRef->associatedElements( ele-elements.begin(), 
                                  linkData,
                                  ecalAssoPFClusters,
                                  reco::PFBlockElement::ECAL,
                                  reco::PFBlock::LINKTEST_ALL );
    
    // loop over the ECAL clusters linked to the iEle 
    if( ! ecalAssoPFClusters.size() ) {
      // This SC element has NO ECAL elements asigned... *SHOULD NOT HAPPEN*
      //std::cout<<" Found SC element with no ECAL assigned "<<std::endl;
      continue;
    }
    
    // This is basically CASE 2
    // .... we loop over all ECAL cluster linked to each other by this SC
    for(std::multimap<double, unsigned int>::iterator itecal = ecalAssoPFClusters.begin(); 
        itecal != ecalAssoPFClusters.end(); ++itecal) { 
      
      // to get the reference to the PF clusters, this is needed.
      reco::PFClusterRef clusterRef = elements[itecal->second].clusterRef();    
      
      // from the clusterRef get the energy, direction, etc
      //      float ClustRawEnergy = clusterRef->energy();
      //      float ClustEta = clusterRef->position().eta();
      //      float ClustPhi = clusterRef->position().phi();

      // initialize the vectors for the PS energies
      vector<double> ps1Ene(0);
      vector<double> ps2Ene(0);
      double ps1=0;  
      double ps2=0;  
      hasSingleleg=false;  
      hasConvTrack=false;

      /*
      cout << " My cluster index " << itecal->second 
           << " energy " <<  ClustRawEnergy
           << " eta " << ClustEta
           << " phi " << ClustPhi << endl;
      */
      // check if this ECAL element is still active (could have been eaten by PFElectronAlgo)
      // ......for now we give the PFElectron Algo *ALWAYS* Shot-Gun on the ECAL elements to the PFElectronAlgo
      
      if( !( active[itecal->second] ) ) {
        //std::cout<< "  .... this ECAL element is NOT active anymore. Is skipped. "<<std::endl;
        continue;
      }
      
      // ------------------------------------------------------------------------------------------
      // TODO: do some tests on the ECAL cluster itself, deciding to use it or not for the Photons
      // ..... ??? Do we need this?
      if ( false ) {
        // Check if there are a large number tracks that do not pass pre-ID around this ECAL cluster
        bool useIt = true;
        int mva_reject=0;  
        bool isClosest=false;  
        std::multimap<double, unsigned int> Trackscheck;  
        blockRef->associatedElements( itecal->second,  
                                      linkData,  
                                      Trackscheck,  
                                      reco::PFBlockElement::TRACK,  
                                      reco::PFBlock::LINKTEST_ALL);  
        for(std::multimap<double, unsigned int>::iterator track = Trackscheck.begin();  
            track != Trackscheck.end(); ++track) {  
           
          // first check if is it's still active  
          if( ! (active[track->second]) ) continue;  
          hasSingleleg=EvaluateSingleLegMVA(blockRef,  primaryVertex_, track->second);  
          //check if it is the closest linked track  
          std::multimap<double, unsigned int> closecheck;  
          blockRef->associatedElements(track->second,  
                                       linkData,  
                                       closecheck,  
                                       reco::PFBlockElement::ECAL,  
                                       reco::PFBlock::LINKTEST_ALL);  
          if(closecheck.begin()->second ==itecal->second)isClosest=true;  
          if(!hasSingleleg)mva_reject++;  
        }  
         
        if(mva_reject>0 &&  isClosest)useIt=false;  
        //if(mva_reject==1 && isClosest)useIt=false;
        if( !useIt ) continue;    // Go to next ECAL cluster within SC
      }
      // ------------------------------------------------------------------------------------------
      
      // We decided to keep the ECAL cluster for this Photon Candidate ...
      elemsToLock.push_back(itecal->second);
      
      // look for PS in this Block linked to this ECAL cluster      
      std::multimap<double, unsigned int> PS1Elems;
      std::multimap<double, unsigned int> PS2Elems;
      //PS Layer 1 linked to ECAL cluster
      blockRef->associatedElements( itecal->second,
                                    linkData,
                                    PS1Elems,
                                    reco::PFBlockElement::PS1,
                                    reco::PFBlock::LINKTEST_ALL );
      //PS Layer 2 linked to the ECAL cluster
      blockRef->associatedElements( itecal->second,
                                    linkData,
                                    PS2Elems,
                                    reco::PFBlockElement::PS2,
                                    reco::PFBlock::LINKTEST_ALL );
      
      // loop over all PS1 and compute energy
      for(std::multimap<double, unsigned int>::iterator iteps = PS1Elems.begin();
          iteps != PS1Elems.end(); ++iteps) {

        // first chekc if it's still active
        if( !(active[iteps->second]) ) continue;
        
        //Check if this PS1 is not closer to another ECAL cluster in this Block          
        std::multimap<double, unsigned int> ECALPS1check;  
        blockRef->associatedElements( iteps->second,  
                                      linkData,  
                                      ECALPS1check,  
                                      reco::PFBlockElement::ECAL,  
                                      reco::PFBlock::LINKTEST_ALL );  
        if(itecal->second==ECALPS1check.begin()->second)//then it is closest linked  
          {
            reco::PFClusterRef ps1ClusterRef = elements[iteps->second].clusterRef();
            ps1Ene.push_back( ps1ClusterRef->energy() );
            ps1=ps1+ps1ClusterRef->energy(); //add to total PS1
            // incativate this PS1 Element
            elemsToLock.push_back(iteps->second);
          }
      }
      for(std::multimap<double, unsigned int>::iterator iteps = PS2Elems.begin();
          iteps != PS2Elems.end(); ++iteps) {

        // first chekc if it's still active
        if( !(active[iteps->second]) ) continue;
        
        // Check if this PS2 is not closer to another ECAL cluster in this Block:
        std::multimap<double, unsigned int> ECALPS2check;  
        blockRef->associatedElements( iteps->second,  
                                      linkData,  
                                      ECALPS2check,  
                                      reco::PFBlockElement::ECAL,  
                                      reco::PFBlock::LINKTEST_ALL );  
        if(itecal->second==ECALPS2check.begin()->second)//is closest linked  
          {
            reco::PFClusterRef ps2ClusterRef = elements[iteps->second].clusterRef();
            ps2Ene.push_back( ps2ClusterRef->energy() );
            ps2=ps2ClusterRef->energy()+ps2; //add to total PS2
            // incativate this PS2 Element
            elemsToLock.push_back(iteps->second);
          }
      }
            
      // loop over the HCAL Clusters linked to the ECAL cluster (CASE 6)
      std::multimap<double, unsigned int> hcalElems;
      blockRef->associatedElements( itecal->second,linkData,
                                    hcalElems,
                                    reco::PFBlockElement::HCAL,
                                    reco::PFBlock::LINKTEST_ALL );

      for(std::multimap<double, unsigned int>::iterator ithcal = hcalElems.begin();
          ithcal != hcalElems.end(); ++ithcal) {

        if ( ! (active[ithcal->second] ) ) continue; // HCAL Cluster already used....
        
        // TODO: Decide if this HCAL cluster is to be used
        // .... based on some Physics
        // .... To we need to check if it's closer to any other ECAL/TRACK?

        bool useHcal = false;
        if ( !useHcal ) continue;
        //not locked
        //elemsToLock.push_back(ithcal->second);
      }

      // This is entry point for CASE 3.
      // .... we loop over all Tracks linked to this ECAL and check if it's labeled as conversion
      // This is the part for looping over all 'Conversion' Tracks
      std::multimap<double, unsigned int> convTracks;
      blockRef->associatedElements( itecal->second,
                                    linkData,
                                    convTracks,
                                    reco::PFBlockElement::TRACK,
                                    reco::PFBlock::LINKTEST_ALL);
      for(std::multimap<double, unsigned int>::iterator track = convTracks.begin();
          track != convTracks.end(); ++track) {

        // first check if is it's still active
        if( ! (active[track->second]) ) continue;
        
        // check if it's a CONV track
        const reco::PFBlockElementTrack * trackRef = dynamic_cast<const reco::PFBlockElementTrack*>((&elements[track->second]));        
        
        //Check if track is a Single leg from a Conversion  
        mvaValue=-999;  
        hasSingleleg=EvaluateSingleLegMVA(blockRef,  primaryVertex_, track->second);  

        // Daniele; example for mvaValues, do the same for single leg trackRef and convRef
        //          
        //      if(hasSingleleg)
        //        mvaValues.push_back(mvaValue);

        //If it is not then it will be used to check Track Isolation at the end  
        if(!hasSingleleg)  
          {  
            bool included=false;  
            //check if this track is already included in the vector so it is linked to an ECAL cluster that is already examined  
            for(unsigned int i=0; i<IsoTracks.size(); i++)  
              {if(IsoTracks[i]==track->second)included=true;}  
            if(!included)IsoTracks.push_back(track->second);  
          }  
        //For now only Pre-ID tracks that are not already identified as Conversions  
        if(hasSingleleg &&!(trackRef->trackType(reco::PFBlockElement::T_FROM_GAMMACONV)))  
          {  
            elemsToLock.push_back(track->second);
            
            reco::TrackRef t_ref=elements[track->second].trackRef();
            bool matched=false;
            for(unsigned int ic=0; ic<singleLegRef.size(); ic++)
              if(singleLegRef[ic]==t_ref)matched=true;
            
            if(!matched){
              singleLegRef.push_back(t_ref);
              MVA_values.push_back(mvaValue);
            }
            //find all the clusters linked to this track  
            std::multimap<double, unsigned int> moreClusters;  
            blockRef->associatedElements( track->second,  
                                          linkData,  
                                          moreClusters,  
                                          reco::PFBlockElement::ECAL,  
                                          reco::PFBlock::LINKTEST_ALL);  
             
            float p_in=sqrt(elements[track->second].trackRef()->innerMomentum().x() * elements[track->second].trackRef()->innerMomentum().x() +  
                            elements[track->second].trackRef()->innerMomentum().y()*elements[track->second].trackRef()->innerMomentum().y()+  
                            elements[track->second].trackRef()->innerMomentum().z()*elements[track->second].trackRef()->innerMomentum().z());  
            float linked_E=0;  
            for(std::multimap<double, unsigned int>::iterator clust = moreClusters.begin();  
                clust != moreClusters.end(); ++clust)  
              {  
                if(!active[clust->second])continue;  
                //running sum of linked energy  
                linked_E=linked_E+elements[clust->second].clusterRef()->energy();  
                //prevent too much energy from being added  
                if(linked_E/p_in>1.5)break;  
                bool included=false;  
                //check if these ecal clusters are already included with the supercluster  
                for(std::multimap<double, unsigned int>::iterator cluscheck = ecalAssoPFClusters.begin();  
                    cluscheck != ecalAssoPFClusters.end(); ++cluscheck)  
                  {  
                    if(cluscheck->second==clust->second)included=true;  
                  }  
                if(!included)AddClusters.push_back(clust->second);//Add to a container of clusters to be Added to the Photon candidate  
              }  
          }

        // Possibly need to be more smart about them (CASE 5)
        // .... for now we simply skip non id'ed tracks
        if( ! (trackRef->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) ) ) continue;  
        hasConvTrack=true;  
        elemsToLock.push_back(track->second);
        //again look at the clusters linked to this track  
        //if(elements[track->second].convRef().isNonnull())
        //{         
        //  ConversionsRef_.push_back(elements[track->second].convRef());
        //}
        std::multimap<double, unsigned int> moreClusters;  
        blockRef->associatedElements( track->second,  
                                      linkData,  
                                      moreClusters,  
                                      reco::PFBlockElement::ECAL,  
                                      reco::PFBlock::LINKTEST_ALL);
        
        float p_in=sqrt(elements[track->second].trackRef()->innerMomentum().x() * elements[track->second].trackRef()->innerMomentum().x() +  
                        elements[track->second].trackRef()->innerMomentum().y()*elements[track->second].trackRef()->innerMomentum().y()+  
                        elements[track->second].trackRef()->innerMomentum().z()*elements[track->second].trackRef()->innerMomentum().z());  
        float linked_E=0;  
        for(std::multimap<double, unsigned int>::iterator clust = moreClusters.begin();  
            clust != moreClusters.end(); ++clust)  
          {  
            if(!active[clust->second])continue;  
            linked_E=linked_E+elements[clust->second].clusterRef()->energy();  
            if(linked_E/p_in>1.5)break;  
            bool included=false;  
            for(std::multimap<double, unsigned int>::iterator cluscheck = ecalAssoPFClusters.begin();  
                cluscheck != ecalAssoPFClusters.end(); ++cluscheck)  
              {  
                if(cluscheck->second==clust->second)included=true;  
              }  
            if(!included)AddClusters.push_back(clust->second);//again only add if it is not already included with the supercluster  
          }
        
        // we need to check for other TRACKS linked to this conversion track, that point possibly no an ECAL cluster not included in the SC
        // .... This is basically CASE 4.
        
        std::multimap<double, unsigned int> moreTracks;
        blockRef->associatedElements( track->second,
                                      linkData,
                                      moreTracks,
                                      reco::PFBlockElement::TRACK,
                                      reco::PFBlock::LINKTEST_ALL);
        
        for(std::multimap<double, unsigned int>::iterator track2 = moreTracks.begin();
            track2 != moreTracks.end(); ++track2) {
          
          // first check if is it's still active
          if( ! (active[track2->second]) ) continue;
          //skip over the 1st leg already found above  
          if(track->second==track2->second)continue;      
          // check if it's a CONV track
          const reco::PFBlockElementTrack * track2Ref = dynamic_cast<const reco::PFBlockElementTrack*>((&elements[track2->second]));    
          if( ! (track2Ref->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) ) ) continue;  // Possibly need to be more smart about them (CASE 5)
          elemsToLock.push_back(track2->second);
          // so it's another active conversion track, that is in the Block and linked to the conversion track we already found
          // find the ECAL cluster linked to it...
          std::multimap<double, unsigned int> convEcal;
          blockRef->associatedElements( track2->second,
                                        linkData,
                                        convEcal,
                                        reco::PFBlockElement::ECAL,
                                        reco::PFBlock::LINKTEST_ALL);
          float p_in=sqrt(elements[track->second].trackRef()->innerMomentum().x()*elements[track->second].trackRef()->innerMomentum().x()+
                          elements[track->second].trackRef()->innerMomentum().y()*elements[track->second].trackRef()->innerMomentum().y()+  
                          elements[track->second].trackRef()->innerMomentum().z()*elements[track->second].trackRef()->innerMomentum().z());  
          
          
          float linked_E=0;
          for(std::multimap<double, unsigned int>::iterator itConvEcal = convEcal.begin();
              itConvEcal != convEcal.end(); ++itConvEcal) {
            
            if( ! (active[itConvEcal->second]) ) continue;
            bool included=false;  
            for(std::multimap<double, unsigned int>::iterator cluscheck = ecalAssoPFClusters.begin();  
                cluscheck != ecalAssoPFClusters.end(); ++cluscheck)  
              {  
                if(cluscheck->second==itConvEcal->second)included=true;  
              }
            linked_E=linked_E+elements[itConvEcal->second].clusterRef()->energy();
            if(linked_E/p_in>1.5)break;
            if(!included){AddClusters.push_back(itConvEcal->second);
            }
            
            // it's still active, so we have to add it.
            // CAUTION: we don't care here if it's part of the SC or not, we include it anyways
            
            // loop over the HCAL Clusters linked to the ECAL cluster (CASE 6)
            std::multimap<double, unsigned int> hcalElems_conv;
            blockRef->associatedElements( itecal->second,linkData,
                                          hcalElems_conv,
                                          reco::PFBlockElement::HCAL,
                                          reco::PFBlock::LINKTEST_ALL );
            
            for(std::multimap<double, unsigned int>::iterator ithcal2 = hcalElems_conv.begin();
                ithcal2 != hcalElems_conv.end(); ++ithcal2) {
              
              if ( ! (active[ithcal2->second] ) ) continue; // HCAL Cluster already used....
              
              // TODO: Decide if this HCAL cluster is to be used
              // .... based on some Physics
              // .... To we need to check if it's closer to any other ECAL/TRACK?
              
              bool useHcal = true;
              if ( !useHcal ) continue;
              
              //elemsToLock.push_back(ithcal2->second);

            } // end of loop over HCAL clusters linked to the ECAL cluster from second CONVERSION leg
            
          } // end of loop over ECALs linked to second T_FROM_GAMMACONV
          
        } // end of loop over SECOND conversion leg

        // TODO: Do we need to check separatly if there are HCAL cluster linked to the track?
        
      } // end of loop over tracks
      
            
      // Calibrate the Added ECAL energy
      float addedCalibEne=0;
      float addedRawEne=0;
      std::vector<double>AddedPS1(0);
      std::vector<double>AddedPS2(0);  
      double addedps1=0;  
      double addedps2=0;  
      for(unsigned int i=0; i<AddClusters.size(); i++)  
        {  
          std::multimap<double, unsigned int> PS1Elems_conv;  
          std::multimap<double, unsigned int> PS2Elems_conv;  
          blockRef->associatedElements(AddClusters[i],  
                                       linkData,  
                                       PS1Elems_conv,  
                                       reco::PFBlockElement::PS1,  
                                       reco::PFBlock::LINKTEST_ALL );  
          blockRef->associatedElements( AddClusters[i],  
                                        linkData,  
                                        PS2Elems_conv,  
                                        reco::PFBlockElement::PS2,  
                                        reco::PFBlock::LINKTEST_ALL );  
           
          for(std::multimap<double, unsigned int>::iterator iteps = PS1Elems_conv.begin();  
              iteps != PS1Elems_conv.end(); ++iteps)  
            {  
              if(!active[iteps->second])continue;  
              std::multimap<double, unsigned int> PS1Elems_check;  
              blockRef->associatedElements(iteps->second,  
                                           linkData,  
                                           PS1Elems_check,  
                                           reco::PFBlockElement::ECAL,  
                                           reco::PFBlock::LINKTEST_ALL );  
              if(PS1Elems_check.begin()->second==AddClusters[i])  
                {  
                   
                  reco::PFClusterRef ps1ClusterRef = elements[iteps->second].clusterRef();  
                  AddedPS1.push_back(ps1ClusterRef->energy());  
                  addedps1=addedps1+ps1ClusterRef->energy();  
                  elemsToLock.push_back(iteps->second);  
                }  
            }  
           
          for(std::multimap<double, unsigned int>::iterator iteps = PS2Elems_conv.begin();  
              iteps != PS2Elems_conv.end(); ++iteps) {  
            if(!active[iteps->second])continue;  
            std::multimap<double, unsigned int> PS2Elems_check;  
            blockRef->associatedElements(iteps->second,  
                                         linkData,  
                                         PS2Elems_check,  
                                         reco::PFBlockElement::ECAL,  
                                         reco::PFBlock::LINKTEST_ALL );  
             
            if(PS2Elems_check.begin()->second==AddClusters[i])  
              {  
                reco::PFClusterRef ps2ClusterRef = elements[iteps->second].clusterRef();  
                AddedPS2.push_back(ps2ClusterRef->energy());  
                addedps2=addedps2+ps2ClusterRef->energy();  
                elemsToLock.push_back(iteps->second);  
              }  
          }  
          reco::PFClusterRef AddclusterRef = elements[AddClusters[i]].clusterRef();  
          addedRawEne = AddclusterRef->energy()+addedRawEne;  
          addedCalibEne = thePFEnergyCalibration_->energyEm(*AddclusterRef,AddedPS1,AddedPS2,false)+addedCalibEne;  
          AddedPS2.clear(); 
          AddedPS1.clear();  
          elemsToLock.push_back(AddClusters[i]);  
        }  
      AddClusters.clear();
      float EE=thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,false)+addedCalibEne;
      PFClusters.push_back(&*clusterRef);
      if(useReg_){
        if(clusterRef->layer()==PFLayer::ECAL_BARREL){
          float LocCorr=EvaluateLCorrMVA(clusterRef);
          EE=LocCorr*clusterRef->energy()+addedCalibEne;
        }
        else{
          EE = thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,false)+addedCalibEne; 
          MVALCorr.push_back(thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,false));
        }       
      }
      else{
        if(clusterRef->layer()==PFLayer::ECAL_BARREL){
          float LocCorr=EvaluateLCorrMVA(clusterRef);
          MVALCorr.push_back(LocCorr*clusterRef->energy());
            }
        else{
          
          MVALCorr.push_back(thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,false));         
        }
      }
      
      //cout<<"Original Energy "<<EE<<"Added Energy "<<addedCalibEne<<endl;
      
      photonEnergy_ +=  EE;
      RawEcalEne    +=  clusterRef->energy()+addedRawEne;
      photonX_      +=  EE * clusterRef->position().X();
      photonY_      +=  EE * clusterRef->position().Y();
      photonZ_      +=  EE * clusterRef->position().Z();                
      ps1TotEne     +=  ps1+addedps1;
      ps2TotEne     +=  ps2+addedps2;
    } // end of loop over all ECAL cluster within this SC
    AddFromElectron_.clear();
    float Elec_energy=0;
    float Elec_rawEcal=0;
    float Elec_totPs1=0;
    float Elec_totPs2=0;
    float ElectronX=0;
    float ElectronY=0;
    float ElectronZ=0;  
    std::vector<double>AddedPS1(0);
    std::vector<double>AddedPS2(0);
    
    EarlyConversion(    
            tempElectronCandidates,
            sc
            );   
    
    if(AddFromElectron_.size()>0)
      { 
        //collect elements from early Conversions that are reconstructed as Electrons
        
        for(std::vector<unsigned int>::const_iterator it = 
              AddFromElectron_.begin();
            it != AddFromElectron_.end(); ++it)
          {
            
            if(elements[*it].type()== reco::PFBlockElement::ECAL)
              {
                //cout<<"Cluster ind "<<*it<<endl;
                AddedPS1.clear();
                AddedPS2.clear();
                unsigned int index=*it;
                reco::PFClusterRef clusterRef = 
                elements[index].clusterRef();
                //match to PS1 and PS2 to this cluster for calibration
                Elec_rawEcal=Elec_rawEcal+
                  elements[index].clusterRef()->energy();
                std::multimap<double, unsigned int> PS1Elems;  
                std::multimap<double, unsigned int> PS2Elems;  
                
                blockRef->associatedElements(index,  
                                             linkData,  
                                             PS1Elems,                                               reco::PFBlockElement::PS1,  
                                             reco::PFBlock::LINKTEST_ALL );  
                blockRef->associatedElements( index,  
                                              linkData,  
                                              PS2Elems,  
                                              reco::PFBlockElement::PS2,  
                                              reco::PFBlock::LINKTEST_ALL );
                
                
                for(std::multimap<double, unsigned int>::iterator iteps = 
                      PS1Elems.begin();  
                    iteps != PS1Elems.end(); ++iteps) 
                  {  
                    std::multimap<double, unsigned int> Clustcheck;                         blockRef->associatedElements( iteps->second,                                                                   linkData,  
                                                                                                                          Clustcheck,  
                                                                                                                          reco::PFBlockElement::ECAL,  
                                                                                                                          reco::PFBlock::LINKTEST_ALL );
                    if(Clustcheck.begin()->second==index)
                      {
                        AddedPS1.push_back(elements[iteps->second].clusterRef()->energy());
                        Elec_totPs1=Elec_totPs1+elements[iteps->second].clusterRef()->energy();
                      }
                  }
                
                for(std::multimap<double, unsigned int>::iterator iteps = 
                      PS2Elems.begin();  
                    iteps != PS2Elems.end(); ++iteps) 
                  {  
                    std::multimap<double, unsigned int> Clustcheck;                         blockRef->associatedElements( iteps->second,                                                                   linkData,  
                                                                                                                          Clustcheck,  
                                                                                                                          reco::PFBlockElement::ECAL,  
                                                                                                                          reco::PFBlock::LINKTEST_ALL );
                    if(Clustcheck.begin()->second==index)
                      {
                        AddedPS2.push_back(elements[iteps->second].clusterRef()->energy());
                        Elec_totPs2=Elec_totPs2+elements[iteps->second].clusterRef()->energy();
                      }
                  }
                
              //energy calibration 
                float EE=thePFEnergyCalibration_->
                  energyEm(*clusterRef,AddedPS1,AddedPS2,false);
                PFClusters.push_back(&*clusterRef);
                if(useReg_){
                  if(clusterRef->layer()==PFLayer::ECAL_BARREL){
                    float LocCorr=EvaluateLCorrMVA(clusterRef);
                    EE=LocCorr*clusterRef->energy();      
                    MVALCorr.push_back(LocCorr*clusterRef->energy());
                  }
                  else {
                    EE=thePFEnergyCalibration_->energyEm(*clusterRef,AddedPS1,AddedPS2,false);
                    MVALCorr.push_back(EE);
                  }
                }
                else{
                  if(clusterRef->layer()==PFLayer::ECAL_BARREL){
                    float LocCorr=EvaluateLCorrMVA(clusterRef);
                    MVALCorr.push_back(LocCorr*clusterRef->energy());
                  }
                  else{
                    
                    MVALCorr.push_back(thePFEnergyCalibration_->energyEm(*clusterRef, AddedPS1,AddedPS2,false));          
                  }
                }
                
                Elec_energy    += EE;
                ElectronX      +=  EE * clusterRef->position().X();
                ElectronY      +=  EE * clusterRef->position().Y();
                ElectronZ      +=  EE * clusterRef->position().Z();
                
              }
          }
        
      }
    
    //std::cout<<"Added Energy to Photon "<<Elec_energy<<" to "<<photonEnergy_<<std::endl;   
    photonEnergy_ +=  Elec_energy;
    RawEcalEne    +=  Elec_rawEcal;
    photonX_      +=  ElectronX;
    photonY_      +=  ElectronY;
    photonZ_      +=  ElectronZ;                
    ps1TotEne     +=  Elec_totPs1;
    ps2TotEne     +=  Elec_totPs2;
    
    // we've looped over all ECAL clusters, ready to generate PhotonCandidate
    if( ! (photonEnergy_ > 0.) ) continue;    // This SC is not a Photon Candidate
    float sum_track_pt=0;
    //Now check if there are tracks failing isolation outside of the Jurassic isolation region  
    for(unsigned int i=0; i<IsoTracks.size(); i++)sum_track_pt=sum_track_pt+elements[IsoTracks[i]].trackRef()->pt();  
    


    math::XYZVector photonPosition(photonX_,
                                   photonY_,
                                   photonZ_);

    math::XYZVector photonDirection=photonPosition.Unit();
    
    math::XYZTLorentzVector photonMomentum(photonEnergy_* photonDirection.X(),
                                           photonEnergy_* photonDirection.Y(),
                                           photonEnergy_* photonDirection.Z(),
                                           photonEnergy_           );

    if(sum_track_pt>(sumPtTrackIsoForPhoton_ + sumPtTrackIsoSlopeForPhoton_ * photonMomentum.pt()))
      {
        //cout<<"Hit Continue "<<endl;
        match_ind.clear(); //release the matched Electron candidates
        continue;
      }

        //THIS SC is not a Photon it fails track Isolation
    //if(sum_track_pt>(2+ 0.001* photonMomentum.pt()))
    //continue;//THIS SC is not a Photon it fails track Isolation

    /*
    std::cout<<" Created Photon with energy = "<<photonEnergy_<<std::endl;
    std::cout<<"                         pT = "<<photonMomentum.pt()<<std::endl;
    std::cout<<"                     RawEne = "<<RawEcalEne<<std::endl;
    std::cout<<"                          E = "<<photonMomentum.e()<<std::endl;
    std::cout<<"                        eta = "<<photonMomentum.eta()<<std::endl;
    std::cout<<"             TrackIsolation = "<< sum_track_pt <<std::endl;
    */

    reco::PFCandidate photonCand(0,photonMomentum, reco::PFCandidate::gamma);
    
    photonCand.setPs1Energy(ps1TotEne);
    photonCand.setPs2Energy(ps2TotEne);
    photonCand.setEcalEnergy(RawEcalEne,photonEnergy_);
    photonCand.setHcalEnergy(0.,0.);
    photonCand.set_mva_nothing_gamma(1.);  
    photonCand.setSuperClusterRef(sc->superClusterRef());
    math::XYZPoint v(primaryVertex_.x(), primaryVertex_.y(), primaryVertex_.z());
    photonCand.setVertex( v  );
    if(hasConvTrack || hasSingleleg)photonCand.setFlag( reco::PFCandidate::GAMMA_TO_GAMMACONV, true);
    int matches=match_ind.size();
    int count=0;
    for ( std::vector<reco::PFCandidate>::const_iterator ec=tempElectronCandidates.begin();   ec != tempElectronCandidates.end(); ++ec ){
      for(int i=0; i<matches; i++)
        {
          if(count==match_ind[i])photonCand.addDaughter(*ec);
          count++;
        }
    }
    //photonCand.setPositionAtECALEntrance(math::XYZPointF(photonMom_.position()));
    // set isvalid_ to TRUE since we've found at least one photon candidate
    isvalid_ = true;
    // push back the candidate into the collection ...
    //Add Elements from Electron
        for(std::vector<unsigned int>::const_iterator it = 
              AddFromElectron_.begin();
            it != AddFromElectron_.end(); ++it)photonCand.addElementInBlock(blockRef,*it);


    // ... and lock all elemts used
    for(std::vector<unsigned int>::const_iterator it = elemsToLock.begin();
        it != elemsToLock.end(); ++it)
      {
        if(active[*it])
          {
            photonCand.addElementInBlock(blockRef,*it);
            if( elements[*it].type() == reco::PFBlockElement::TRACK  )
              {
                if(elements[*it].convRef().isNonnull())
                  {
                    //make sure it is not stored already as the partner track
                    bool matched=false;
                    for(unsigned int ic = 0; ic < ConversionsRef_.size(); ic++)
                      {
                        if(ConversionsRef_[ic]==elements[*it].convRef())matched=true;
                      }
                    if(!matched)ConversionsRef_.push_back(elements[*it].convRef());
                  }
              }
          }
        active[*it] = false;    
      }
    //Do Global Corrections here:
   float GCorr=EvaluateGCorrMVA(photonCand);
    if(useReg_){
    math::XYZTLorentzVector photonCorrMomentum(GCorr*photonEnergy_* photonDirection.X(),
                                               GCorr*photonEnergy_* photonDirection.Y(),
                                               GCorr*photonEnergy_* photonDirection.Z(),
                                               GCorr * photonEnergy_           );
    photonCand.setP4(photonCorrMomentum);
    }
    // here add the extra information
    PFCandidatePhotonExtra myExtra(sc->superClusterRef());
    //Mustache ID variables
    int excl=0;
    float Mustache_et_out=0; 
    Mustache Must;
    Must.MustacheID(PFClusters, excl, Mustache_et_out);
    myExtra.setMustache_Et(Mustache_et_out);
    myExtra.setExcludedClust(excl);
    //Store regressed energy
    myExtra.setMVAGlobalCorrE(GCorr * photonEnergy_);
    float Res=EvaluateResMVA(photonCand);
    myExtra.SetPFPhotonRes(Res*1.253);
    for(unsigned int l=0; l<MVALCorr.size(); ++l)
      {
        myExtra.addLCorrClusEnergy(MVALCorr[l]);
      }

    //    Daniele example for mvaValues
    //    do the same for single leg trackRef and convRef
    for(unsigned int ic = 0; ic < MVA_values.size(); ic++)
      {
        myExtra.addSingleLegConvMva(MVA_values[ic]);
        myExtra.addSingleLegConvTrackRef(singleLegRef[ic]);
        //cout<<"Single Leg Tracks "<<singleLegRef[ic]->pt()<<" MVA "<<MVA_values[ic]<<endl;
      }
    for(unsigned int ic = 0; ic < ConversionsRef_.size(); ic++)
      {
        myExtra.addConversionRef(ConversionsRef_[ic]);
        //cout<<"Conversion Pairs "<<ConversionsRef_[ic]->pairMomentum()<<endl;
      }
    pfPhotonExtraCandidates.push_back(myExtra);
    pfCandidates->push_back(photonCand);
    // ... and reset the vector
    elemsToLock.resize(0);
    hasConvTrack=false;
    hasSingleleg=false;
  } // end of loops over all elements in block
  
  return;
}

float PFPhotonAlgo::EvaluateResMVA(reco::PFCandidate photon){
  float BDTG=1;
  PFPhoEta_=photon.eta();
  PFPhoPhi_=photon.phi();
  PFPhoEt_=photon.pt();
  //recalculate R9 from sum PFClusterEnergy and E3x3 from Highest PFCluster Energy
  SCPhiWidth_=photon.superClusterRef()->phiWidth();
  SCEtaWidth_=photon.superClusterRef()->etaWidth();  
  //get from track with min R;
  RConv_=130;
  float ClustSumEt=0;
  std::vector<float>Clust_E(0);
  std::vector<float>Clust_Et(0);
  std::vector<float>Clust_Eta(0);
  std::vector<float>Clust_Phi(0);
  std::vector<reco::PFClusterRef> PFClusRef(0);
  std::vector<const CaloCluster*> PFclusters;
  //Multimap to sort clusters by energy
  std::multimap<float, int>Clust;
  PFCandidate::ElementsInBlocks eleInBlocks = photon.elementsInBlocks();
  for(unsigned i=0; i<eleInBlocks.size(); i++)
    {
      PFBlockRef blockRef = eleInBlocks[i].first;
      unsigned indexInBlock = eleInBlocks[i].second;
      const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
      const reco::PFBlockElement& element = elements[indexInBlock];
      if(element.type()==reco::PFBlockElement::TRACK){
        float R=sqrt(element.trackRef()->innerPosition().X()*element.trackRef()->innerPosition().X()+element.trackRef()->innerPosition().Y()*element.trackRef()->innerPosition().Y());
        if(RConv_>R)RConv_=R;
      }
      
      if(element.type()==reco::PFBlockElement::ECAL){
        reco::PFClusterRef ClusterRef = element.clusterRef();
        //PFClusRef.push_back(ClusterRef);
        //clusters.push_back(ClusterRef);
        Clust_E.push_back(ClusterRef->energy());
        Clust_Et.push_back(ClusterRef->pt());   
        ClustSumEt=ClustSumEt+ClusterRef->pt();
        Clust_Eta.push_back(ClusterRef->eta());
        Clust_Phi.push_back(ClusterRef->phi());
        PFclusters.push_back(&*ClusterRef);
      }
      
      if(element.type()==reco::PFBlockElement::GSF)
        {
          //elements[indexInBlock].GsftrackRef();
          //  RConv_=sqrt(element.trackRef()->innerPosition().X()*element.trackRef()->innerPosition().X() + element.trackRef()->innerPosition().Y()*element.trackRef()->innerPosition().Y());
        }
      
    }
  
  nPFClus_=Clust_Et.size();
  
  //std::vector<int>included(0);
  //included=getPFMustacheClus(nPFClus_, Clust_Et, Clust_Eta, Clust_Phi);
  //if(included.size()>0)excluded_=nPFClus_-included.size();
  //else excluded_=0;
  //cout<<"initial excluded "<<excluded_<<endl;
  float Mustache_Et_out=0;
  int PFClus=0;
  Mustache Must;
  Must.MustacheID(PFclusters, PFClus, Mustache_Et_out);
  excluded_=PFClus;
  //order the clusters by energy
  //  float Mustache_Et=0;
  float ClusSum=0;
  for(unsigned int i=0; i<Clust_E.size(); ++i)
    {
      
      Clust.insert(make_pair(Clust_E[i], i));
      //Mustache_Et=Mustache_Et+Clust_Et[i];
      ClusSum=ClusSum+Clust_E[i];
    }
  Mustache_EtRatio_=(Mustache_Et_out)/ClustSumEt;
  std::multimap<float, int>::reverse_iterator it;
  it=Clust.rbegin();
  int max_c=(*it).second;
  it=Clust.rend();
  int min_c=(*it).second;
  if(nPFClus_>1)LowClusE_=Clust_E[min_c];
  else LowClusE_=0;
  if(nPFClus_>1){
    dEta_=fabs(Clust_Eta[max_c]-Clust_Eta[min_c]);
    dPhi_=acos(cos(Clust_Phi[max_c]-Clust_Phi[min_c]));
  }
  else{
    dEta_=0;
    dPhi_=0;
  }
  
  float dRmin=999;
  float SCphi=photon.superClusterRef()->position().phi();
  float SCeta=photon.superClusterRef()->position().eta();
  for(unsigned i=0; i<eleInBlocks.size(); i++)
    {
      PFBlockRef blockRef = eleInBlocks[i].first;
      unsigned indexInBlock = eleInBlocks[i].second;
      const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
      const reco::PFBlockElement& element = elements[indexInBlock];
      if(element.type()==reco::PFBlockElement::ECAL){
        reco::PFClusterRef ClusterRef = element.clusterRef();
        float eta=ClusterRef->position().eta();
        float phi=ClusterRef->position().phi();
        float dR=deltaR(SCeta, SCphi, eta, phi);
        if(dR<dRmin){
          dRmin=dR;
          fill5x5Map(ClusterRef);
          PFPhoR9_=e3x3_/ClusSum;
        }
      }
    } 
  //fill Material Map:
  int ix = X0_sum->GetXaxis()->FindBin(PFPhoEta_);
  int iy = X0_sum->GetYaxis()->FindBin(PFPhoPhi_);
  x0inner_= X0_inner->GetBinContent(ix,iy);
  x0middle_=X0_middle->GetBinContent(ix,iy);
  x0outer_=X0_outer->GetBinContent(ix,iy);
  
  float GC_Var[16];
  GC_Var[0]=PFPhoEta_;
  GC_Var[1]=PFPhoEt_;
  GC_Var[2]=PFPhoR9_;
  GC_Var[3]=PFPhoPhi_;
  GC_Var[4]=SCEtaWidth_;
  GC_Var[5]=SCPhiWidth_;
  GC_Var[6]=x0inner_;  
  GC_Var[7]=x0middle_;
  GC_Var[8]=x0outer_;
  GC_Var[9]=nPFClus_;
  GC_Var[10]=RConv_;
  GC_Var[11]=LowClusE_;
  GC_Var[12]=dEta_;
  GC_Var[13]=dPhi_;
  GC_Var[14]=excluded_;
  GC_Var[15]= Mustache_EtRatio_;
  
  BDTG=ReaderRes_->GetResponse(GC_Var);
  //  cout<<"Res "<<BDTG<<endl;
  
  //  cout<<"BDTG Parameters X0"<<x0inner_<<", "<<x0middle_<<", "<<x0outer_<<endl;
  // cout<<"Et, Eta, Phi "<<PFPhoEt_<<", "<<PFPhoEta_<<", "<<PFPhoPhi_<<endl;
  // cout<<"PFPhoR9 "<<PFPhoR9_<<endl;
  // cout<<"R "<<RConv_<<endl;
  
  return BDTG;

}

float PFPhotonAlgo::EvaluateGCorrMVA(reco::PFCandidate photon){
  float BDTG=1;
  PFPhoEta_=photon.eta();
  PFPhoPhi_=photon.phi();
  PFPhoEt_=photon.pt();
  //recalculate R9 from sum PFClusterEnergy and E3x3 from Highest PFCluster Energy
  SCPhiWidth_=photon.superClusterRef()->phiWidth();
  SCEtaWidth_=photon.superClusterRef()->etaWidth();  
  //get from track with min R;
  RConv_=130;
  float ClustSumEt=0;
  std::vector<float>Clust_E(0);
  std::vector<float>Clust_Et(0);
  std::vector<float>Clust_Eta(0);
  std::vector<float>Clust_Phi(0);
  std::vector<reco::PFClusterRef> PFClusRef(0);
  std::vector<const CaloCluster*> PFclusters;
  //Multimap to sort clusters by energy
  std::multimap<float, int>Clust;
  PFCandidate::ElementsInBlocks eleInBlocks = photon.elementsInBlocks();
  for(unsigned i=0; i<eleInBlocks.size(); i++)
    {
      PFBlockRef blockRef = eleInBlocks[i].first;
      unsigned indexInBlock = eleInBlocks[i].second;
      const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
      const reco::PFBlockElement& element = elements[indexInBlock];
      if(element.type()==reco::PFBlockElement::TRACK){
        float R=sqrt(element.trackRef()->innerPosition().X()*element.trackRef()->innerPosition().X()+element.trackRef()->innerPosition().Y()*element.trackRef()->innerPosition().Y());
        if(RConv_>R)RConv_=R;
      }
      
      if(element.type()==reco::PFBlockElement::ECAL){
        reco::PFClusterRef ClusterRef = element.clusterRef();
        //PFClusRef.push_back(ClusterRef);
        //clusters.push_back(ClusterRef);
        Clust_E.push_back(ClusterRef->energy());
        Clust_Et.push_back(ClusterRef->pt());   
        ClustSumEt=ClustSumEt+ClusterRef->pt();
        Clust_Eta.push_back(ClusterRef->eta());
        Clust_Phi.push_back(ClusterRef->phi());
        PFclusters.push_back(&*ClusterRef);
      }
      
      if(element.type()==reco::PFBlockElement::GSF)
        {
          //elements[indexInBlock].GsftrackRef();
          //  RConv_=sqrt(element.trackRef()->innerPosition().X()*element.trackRef()->innerPosition().X() + element.trackRef()->innerPosition().Y()*element.trackRef()->innerPosition().Y());
        }
      
    }
  
  nPFClus_=Clust_Et.size();
  
  //std::vector<int>included(0);
  //included=getPFMustacheClus(nPFClus_, Clust_Et, Clust_Eta, Clust_Phi);
  //if(included.size()>0)excluded_=nPFClus_-included.size();
  //else excluded_=0;
  //cout<<"initial excluded "<<excluded_<<endl;
  float Mustache_Et_out=0;
  int PFClus=0;
  Mustache Must;
  Must.MustacheID(PFclusters, PFClus, Mustache_Et_out);
  excluded_=PFClus;
  //order the clusters by energy
  //  float Mustache_Et=0;
  float ClusSum=0;
  for(unsigned int i=0; i<Clust_E.size(); ++i)
    {
      
      Clust.insert(make_pair(Clust_E[i], i));
      //Mustache_Et=Mustache_Et+Clust_Et[i];
      ClusSum=ClusSum+Clust_E[i];
    }
  Mustache_EtRatio_=(Mustache_Et_out)/ClustSumEt;
  std::multimap<float, int>::reverse_iterator it;
  it=Clust.rbegin();
  int max_c=(*it).second;
  it=Clust.rend();
  int min_c=(*it).second;
  if(nPFClus_>1)LowClusE_=Clust_E[min_c];
  else LowClusE_=0;
  if(nPFClus_>1){
    dEta_=fabs(Clust_Eta[max_c]-Clust_Eta[min_c]);
    dPhi_=acos(cos(Clust_Phi[max_c]-Clust_Phi[min_c]));
  }
  else{
    dEta_=0;
    dPhi_=0;
  }
  float dRmin=999;
  float SCphi=photon.superClusterRef()->position().phi();
  float SCeta=photon.superClusterRef()->position().eta();
  for(unsigned i=0; i<eleInBlocks.size(); i++)
    {
      PFBlockRef blockRef = eleInBlocks[i].first;
      unsigned indexInBlock = eleInBlocks[i].second;
      const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
      const reco::PFBlockElement& element = elements[indexInBlock];
      if(element.type()==reco::PFBlockElement::ECAL){
        reco::PFClusterRef ClusterRef = element.clusterRef();
        float eta=ClusterRef->position().eta();
        float phi=ClusterRef->position().phi();
        float dR=deltaR(SCeta, SCphi, eta, phi);
        if(dR<dRmin){
          dRmin=dR;
          fill5x5Map(ClusterRef);
          PFPhoR9_=e3x3_/ClusSum;
        }
      }
    } 

  //fill Material Map:
  int ix = X0_sum->GetXaxis()->FindBin(PFPhoEta_);
  int iy = X0_sum->GetYaxis()->FindBin(PFPhoPhi_);
  x0inner_= X0_inner->GetBinContent(ix,iy);
  x0middle_=X0_middle->GetBinContent(ix,iy);
  x0outer_=X0_outer->GetBinContent(ix,iy);

  float GC_Var[16];
  GC_Var[0]=PFPhoEta_;
  GC_Var[1]=PFPhoEt_;
  GC_Var[2]=PFPhoR9_;
  GC_Var[3]=PFPhoPhi_;
  GC_Var[4]=SCEtaWidth_;
  GC_Var[5]=SCPhiWidth_;
  GC_Var[6]=x0inner_;  
  GC_Var[7]=x0middle_;
  GC_Var[8]=x0outer_;
  GC_Var[9]=nPFClus_;
  GC_Var[10]=RConv_;
  GC_Var[11]=LowClusE_/photon.energy();
  GC_Var[12]=dEta_;
  GC_Var[13]=dPhi_;
  GC_Var[14]=excluded_;
  GC_Var[15]= Mustache_EtRatio_;
  

  BDTG=ReaderGC_->GetResponse(GC_Var);
  //  cout<<"GC "<<BDTG<<endl;  
  
  //  cout<<"BDTG Parameters X0"<<x0inner_<<", "<<x0middle_<<", "<<x0outer_<<endl;
  // cout<<"Et, Eta, Phi "<<PFPhoEt_<<", "<<PFPhoEta_<<", "<<PFPhoPhi_<<endl;
  // cout<<"PFPhoR9 "<<PFPhoR9_<<endl;
  // cout<<"R "<<RConv_<<endl;
  
  return BDTG;

}

float PFPhotonAlgo::EvaluateLCorrMVA(reco::PFClusterRef clusterRef ){
  float BDTG=1;
  
  GetCrysCoordinates(clusterRef);
  fill5x5Map(clusterRef);
  VtxZ_=primaryVertex_.z();
  ClusPhi_=clusterRef->position().phi(); 
  ClusEta_=fabs(clusterRef->position().eta());
  EB=fabs(clusterRef->position().eta())/clusterRef->position().eta();
  logPFClusE_=log(clusterRef->energy());
   float LC_Var[20];
   LC_Var[0]=VtxZ_;
   LC_Var[1]=EB;
   LC_Var[2]=ClusEta_;
   LC_Var[3]=ClusPhi_;
   LC_Var[4]=logPFClusE_;
   LC_Var[5]=eSeed_;
   LC_Var[6]=ClusR9_;
   LC_Var[7]=e1x3_;
   LC_Var[8]=e3x1_;
   LC_Var[9]=Clus5x5ratio_;
   LC_Var[10]=e1x5_;
   LC_Var[11]=e2x5Max_;
   LC_Var[12]=e2x5Top_;
   LC_Var[13]=e2x5Bottom_;
   LC_Var[14]=e2x5Left_;
   LC_Var[15]=e2x5Right_;
   LC_Var[16]=CrysEta_;
   LC_Var[17]=CrysPhi_;
   LC_Var[18]=PFCrysPhiCrack_;
   LC_Var[19]=PFCrysEtaCrack_;
   BDTG=ReaderLC_->GetResponse(LC_Var);   
   //   cout<<"LC "<<BDTG<<endl;  
   return BDTG;
  
}


void PFPhotonAlgo::GetCrysCoordinates(reco::PFClusterRef clusterRef){
  // Commented by Florian. Source of warnings as not used 
  //  float PFSeedEta=99;
  float PFSeedPhi=99;
  float PFSeedTheta=99;
  double PFSeedE=0;
  //  unsigned int SeedDetId=-1;
  // float seedPhi=0;
  //  float seedEta=0;
  DetId idseed;
  const std::vector< reco::PFRecHitFraction >& PFRecHits=
    clusterRef->recHitFractions();
  for ( std::vector< reco::PFRecHitFraction >::const_iterator it = PFRecHits.begin();
        it != PFRecHits.end(); ++it){
    const PFRecHitRef& RefPFRecHit = it->recHitRef();
    unsigned index=it-PFRecHits.begin();
    float frac=clusterRef->hitsAndFractions()[index].second;
    float E= RefPFRecHit->energy()* frac;
    if(E>PFSeedE){
      //      SeedDetId=RefPFRecHit.index();
      PFSeedE=E;  
      //      PFSeedEta=RefPFRecHit->positionREP().eta(); 
      PFSeedPhi=RefPFRecHit->positionREP().phi();
      PFSeedTheta=RefPFRecHit->positionREP().theta();
      RefPFRecHit->positionREP().theta();
      idseed = RefPFRecHit->detId();
    }
  }
  EBDetId EBidSeed=EBDetId(idseed.rawId());
  CrysIEta_=EBidSeed.ieta();
  CrysIPhi_=EBidSeed.iphi();
  
  //Crystal Coordinates:
  double Pi=TMath::Pi();
  float Phi=clusterRef->position().phi(); 
  //  float Eta=clusterRef->position().eta();
  double Theta = -(clusterRef->position().theta())+0.5* Pi;
  double PhiCentr = TVector2::Phi_mpi_pi(PFSeedPhi);
  double PhiWidth = (Pi/180.);
  double PhiCry = (TVector2::Phi_mpi_pi(Phi-PhiCentr))/PhiWidth;
  double ThetaCentr = -PFSeedTheta+0.5*Pi;
  double ThetaWidth = (Pi/180.)*cos(ThetaCentr);
  
  //cout<<"Clust Theta "<<Theta<<" Crys Theta "<<ThetaCentr<<endl;
  //cout<<" Width "<< ThetaWidth<<endl;
  double EtaCry = (Theta-ThetaCentr)/ThetaWidth; 
  CrysEta_=EtaCry;
  CrysPhi_=PhiCry;
 
  //check Module and crack:
  int iphi=CrysIPhi_;
  int phimod=iphi%20;
  if(phimod>1)PFCrysPhiCrack_=2;
  else PFCrysPhiCrack_=phimod; //should be 0, 1
  
  if(abs(CrysIEta_)==1 || abs(CrysIEta_)==2 )
    PFCrysEtaCrack_=abs(CrysIEta_);
  if(abs(CrysIEta_)>2 && abs(CrysIEta_)<24)
    PFCrysEtaCrack_=3;
  if(abs(CrysIEta_)==24)
    PFCrysEtaCrack_=4;
  if(abs(CrysIEta_)==25)
        PFCrysEtaCrack_=5;
      if(abs(CrysIEta_)==26)
        PFCrysEtaCrack_=6;
      if(abs(CrysIEta_)==27)
                PFCrysEtaCrack_=7;
      if(abs(CrysIEta_)>27 &&  abs(CrysIEta_)<44)
        PFCrysEtaCrack_=8;
      if(abs(CrysIEta_)==44)
                PFCrysEtaCrack_=9;
      if(abs(CrysIEta_)==45)
        PFCrysEtaCrack_=10;
      if(abs(CrysIEta_)==46)
                PFCrysEtaCrack_=11;
      if(abs(CrysIEta_)==47)
        PFCrysEtaCrack_=12;
      if(abs(CrysIEta_)>47 &&  abs(CrysIEta_)<64)
        PFCrysEtaCrack_=13;
      if(abs(CrysIEta_)==64)
        PFCrysEtaCrack_=14;
      if(abs(CrysIEta_)==65)
        PFCrysEtaCrack_=15;
      if(abs(CrysIEta_)==66)
        PFCrysEtaCrack_=16;
      if(abs(CrysIEta_)==67)
        PFCrysEtaCrack_=17;
      if(abs(CrysIEta_)>67 &&  abs(CrysIEta_)<84)
        PFCrysEtaCrack_=18;
      if(abs(CrysIEta_)==84)
        PFCrysEtaCrack_=19;
      if(abs(CrysIEta_)==85)
        PFCrysEtaCrack_=20;
      
}

void PFPhotonAlgo::fill5x5Map(reco::PFClusterRef clusterRef){

  // commented out by Florian. Not used in the code
  //  float PFSeedEta=99;
  //  float PFSeedPhi=99;
  double PFSeedE=0;
  //  unsigned int SeedDetId=-1;
  //  float seedPhi=0;
  //float seedEta=0;
  DetId idseed;
  const std::vector< reco::PFRecHitFraction >& PFRecHits=
    clusterRef->recHitFractions();
  for ( std::vector< reco::PFRecHitFraction >::const_iterator it = PFRecHits.begin();
        it != PFRecHits.end(); ++it){
    const PFRecHitRef& RefPFRecHit = it->recHitRef();
    unsigned index=it-PFRecHits.begin();
    //DetId id=eclusterRef->hitsAndFractions()[index].first;
    float frac=clusterRef->hitsAndFractions()[index].second;
    float E= RefPFRecHit->energy()* frac;
    if(E>PFSeedE){
      //      SeedDetId=RefPFRecHit.index();
      PFSeedE=E;  
      //      PFSeedEta=RefPFRecHit->positionREP().eta(); 
      //      PFSeedPhi=RefPFRecHit->positionREP().phi(); 
      idseed = RefPFRecHit->detId();
    }
  }
  
  
  //initialize 5x5 map
  for(int i=0; i<5; ++i)
    for(int j=0; j<5; ++j)e5x5Map[i][j]=0;
  float E3x3=0;
  float E5x5=0;
  //  int count=0;
  for ( std::vector< reco::PFRecHitFraction >::const_iterator it = PFRecHits.begin();
        it != PFRecHits.end(); ++it){
    unsigned index=it-PFRecHits.begin();
    const PFRecHitRef& RefPFRecHit = it->recHitRef();
    float frac=clusterRef->hitsAndFractions()[index].second;
    DetId id = RefPFRecHit->detId();
    if(idseed.subdetId()==EcalBarrel){
      int deta=EBDetId::distanceEta(id,idseed);
      int dphi=EBDetId::distancePhi(id,idseed); 
      EBDetId EBidSeed=EBDetId(idseed.rawId());
      if(abs(dphi)<=1 && abs(deta)<=1)
        {
          E3x3=E3x3+(RefPFRecHit->energy()*frac);
        }
      if(abs(dphi)<=2 && abs(deta)<=2)
        {
          //center the array on [2][2] to be the Seed
          //deta and deta are unsigned so you want to recompute 
          //to get top bottom left right 
          EBDetId EBid=EBDetId(id.rawId());
          //note this is actually opposite to make it consistent to the lazy tools left right which inverts them
          int i=EBidSeed.ieta()-EBid.ieta();
          
          int j=EBid.iphi()-EBidSeed.iphi();
          int iEta=i+2;
          int iPhi=j+2;
          
          e5x5Map[iEta][iPhi]=RefPFRecHit->energy()*frac;
          E5x5=E5x5+(RefPFRecHit->energy()*frac);
        }
    }
    if(idseed.subdetId()==EcalEndcap){
      //dx and dy are unsigned so you want to recompute 
      //to get top bottom left right 
      int dx=EEDetId::distanceX(id,idseed);
      int dy=EEDetId::distanceY(id,idseed);
      EEDetId EEidSeed=EEDetId(idseed.rawId());
      //dx and dy are unsigned so you want to recompute 
      //to get top bottom left right 
      if(abs(dx)<=1 && abs(dy)<=1)
        {
          E3x3=E3x3+(RefPFRecHit->energy()*frac);
        }
      if(abs(dx)<=2 && abs(dy)<=2)
        {
          EEDetId EEid=EEDetId(id.rawId());
          int i=EEid.ix()-EEidSeed.ix();
          int j=EEid.iy()-EEidSeed.iy();
          //center the array on [2][2] to be the Seed
          int ix=i+2;
          int iy=j+2;
          e5x5Map[ix][iy]=RefPFRecHit->energy()*frac;
          E5x5=E5x5+(RefPFRecHit->energy()*frac);
        }
    }
    
  }
  e3x3_=E3x3;
  ClusR9_=E3x3/clusterRef->energy();
  Clus5x5ratio_=E5x5/clusterRef->energy();
  eSeed_= e5x5Map[2][2]/clusterRef->energy();
  e1x3_=(e5x5Map[2][2]+e5x5Map[1][2]+e5x5Map[3][2])/clusterRef->energy();
  e3x1_=(e5x5Map[2][2]+e5x5Map[2][1]+e5x5Map[2][3])/clusterRef->energy();
  e1x5_=e5x5Map[2][2]+e5x5Map[2][0]+e5x5Map[2][1]+e5x5Map[2][3]+e5x5Map[2][4];
  e2x5Top_=(e5x5Map[0][4]+e5x5Map[1][4]+e5x5Map[2][4]
            +e5x5Map[3][4]+e5x5Map[4][4]
    +e5x5Map[0][3]+e5x5Map[1][3]+e5x5Map[2][3]
            +e5x5Map[3][3]+e5x5Map[4][3])/clusterRef->energy();
  
  e2x5Bottom_=(e5x5Map[0][0]+e5x5Map[1][0]+e5x5Map[2][0]
               +e5x5Map[3][0]+e5x5Map[4][0]
               +e5x5Map[0][1]+e5x5Map[1][1]
               +e5x5Map[2][1]+e5x5Map[3][1]+e5x5Map[4][1])/clusterRef->energy();
  e2x5Left_= ( e5x5Map[0][1]+e5x5Map[0][1]
               +e5x5Map[0][2]+e5x5Map[0][3]+e5x5Map[0][4]
               +e5x5Map[1][0]+e5x5Map[1][1]+e5x5Map[1][2]
               +e5x5Map[1][3]+e5x5Map[1][4])/clusterRef->energy();
  
  e2x5Right_ =(e5x5Map[4][0]+e5x5Map[4][1]
               +e5x5Map[4][2]+e5x5Map[4][3]+e5x5Map[4][4]
               +e5x5Map[3][0]+e5x5Map[3][1]+e5x5Map[3][2]
               +e5x5Map[3][3]+e5x5Map[3][4])/clusterRef->energy(); 
  float centerstrip=e5x5Map[2][2]+e5x5Map[2][0]
    +e5x5Map[2][1]+e5x5Map[2][3]+e5x5Map[2][4];
  float rightstrip=e5x5Map[3][2]+e5x5Map[3][0]
    +e5x5Map[3][1]+e5x5Map[3][3]+e5x5Map[3][4];
  float leftstrip=e5x5Map[1][2]+e5x5Map[1][0]+e5x5Map[1][1]
    +e5x5Map[1][3]+e5x5Map[1][4];
  if(rightstrip>leftstrip)e2x5Max_=rightstrip+centerstrip;
  else e2x5Max_=leftstrip+centerstrip;
  e2x5Max_=e2x5Max_/clusterRef->energy();
}




bool PFPhotonAlgo::EvaluateSingleLegMVA(const reco::PFBlockRef& blockref, const reco::Vertex& primaryvtx, unsigned int track_index)  
{  
  bool convtkfound=false;  
  const reco::PFBlock& block = *blockref;  
  const edm::OwnVector< reco::PFBlockElement >& elements = block.elements();  
  //use this to store linkdata in the associatedElements function below  
  PFBlock::LinkData linkData =  block.linkData();  
  //calculate MVA Variables  
  chi2=elements[track_index].trackRef()->chi2()/elements[track_index].trackRef()->ndof();  
  nlost=elements[track_index].trackRef()->trackerExpectedHitsInner().numberOfLostHits();  
  nlayers=elements[track_index].trackRef()->hitPattern().trackerLayersWithMeasurement();  
  track_pt=elements[track_index].trackRef()->pt();  
  STIP=elements[track_index].trackRefPF()->STIP();  
   
  float linked_e=0;  
  float linked_h=0;  
  std::multimap<double, unsigned int> ecalAssoTrack;  
  block.associatedElements( track_index,linkData,  
                            ecalAssoTrack,  
                            reco::PFBlockElement::ECAL,  
                            reco::PFBlock::LINKTEST_ALL );  
  std::multimap<double, unsigned int> hcalAssoTrack;  
  block.associatedElements( track_index,linkData,  
                            hcalAssoTrack,  
                            reco::PFBlockElement::HCAL,  
                            reco::PFBlock::LINKTEST_ALL );  
  if(ecalAssoTrack.size() > 0) {  
    for(std::multimap<double, unsigned int>::iterator itecal = ecalAssoTrack.begin();  
        itecal != ecalAssoTrack.end(); ++itecal) {  
      linked_e=linked_e+elements[itecal->second].clusterRef()->energy();  
    }  
  }  
  if(hcalAssoTrack.size() > 0) {  
    for(std::multimap<double, unsigned int>::iterator ithcal = hcalAssoTrack.begin();  
        ithcal != hcalAssoTrack.end(); ++ithcal) {  
      linked_h=linked_h+elements[ithcal->second].clusterRef()->energy();  
    }  
  }  
  EoverPt=linked_e/elements[track_index].trackRef()->pt();  
  HoverPt=linked_h/elements[track_index].trackRef()->pt();  
  GlobalVector rvtx(elements[track_index].trackRef()->innerPosition().X()-primaryvtx.x(),  
                    elements[track_index].trackRef()->innerPosition().Y()-primaryvtx.y(),  
                    elements[track_index].trackRef()->innerPosition().Z()-primaryvtx.z());  
  double vtx_phi=rvtx.phi();  
  //delta Phi between conversion vertex and track  
  del_phi=fabs(deltaPhi(vtx_phi, elements[track_index].trackRef()->innerMomentum().Phi()));  
  mvaValue = tmvaReader_->EvaluateMVA("BDT");  
  if(mvaValue > MVACUT)convtkfound=true;  
  return convtkfound;  
}

//Recover Early Conversions reconstructed as PFelectrons
void PFPhotonAlgo::EarlyConversion(    
                                   //std::auto_ptr< reco::PFCandidateCollection > 
                                   //&pfElectronCandidates_,
                                   std::vector<reco::PFCandidate>& 
                                   tempElectronCandidates,
                                   const reco::PFBlockElementSuperCluster* sc
                                   ){
  //step 1 check temp electrons for clusters that match Photon Supercluster:
  // permElectronCandidates->clear();
  int count=0;
  for ( std::vector<reco::PFCandidate>::const_iterator ec=tempElectronCandidates.begin();   ec != tempElectronCandidates.end(); ++ec ) 
    {
      //      bool matched=false;
      int mh=ec->gsfTrackRef()->trackerExpectedHitsInner().numberOfLostHits();
      if(mh==0)continue;//Case where missing hits greater than zero
      
      reco::GsfTrackRef gsf=ec->gsfTrackRef();
      //some hoopla to get Electron SC ref
      
      if(gsf->extra().isAvailable() && gsf->extra()->seedRef().isAvailable()) 
        {
          reco::ElectronSeedRef seedRef=  gsf->extra()->seedRef().castTo<reco::ElectronSeedRef>();
          if(seedRef.isAvailable() && seedRef->isEcalDriven()) 
            {
              reco::SuperClusterRef ElecscRef = seedRef->caloCluster().castTo<reco::SuperClusterRef>();
              
              if(ElecscRef.isNonnull()){
                //finally see if it matches:
                reco::SuperClusterRef PhotscRef=sc->superClusterRef();
                
                if(PhotscRef==ElecscRef)
                  {
                    match_ind.push_back(count);
                    //  matched=true; 
                    //cout<<"Matched Electron with Index "<<count<<" This is the electron "<<*ec<<endl;
                    //find that they have the same SC footprint start to collect Clusters and tracks and these will be passed to PFPhoton
                    reco::PFCandidate::ElementsInBlocks eleInBlocks = ec->elementsInBlocks();
                    for(unsigned i=0; i<eleInBlocks.size(); i++) 
                      {
                        reco::PFBlockRef blockRef = eleInBlocks[i].first;
                        unsigned indexInBlock = eleInBlocks[i].second;   
                        //const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
                        //const reco::PFBlockElement& element = elements[indexInBlock];                 
                        
                        AddFromElectron_.push_back(indexInBlock);               
                      }             
                  }             
              }
            }     
        }           
      count++;
    }
}