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// Package:          CalibTracker/SiStripHitEfficiency
// Class:            HitEff
// Original Author:  Keith Ulmer--University of Colorado
//                   keith.ulmer@colorado.edu
//

// system include files
#include <memory>
#include <string>
#include <iostream>

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDAnalyzer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "CalibTracker/SiStripHitEfficiency/interface/HitEff.h"
#include "DataFormats/SiStripDetId/interface/StripSubdetector.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryVector/interface/GlobalVector.h"
#include "DataFormats/GeometryVector/interface/LocalVector.h"
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "Geometry/CommonDetUnit/interface/GeomDetType.h"
#include "Geometry/CommonDetUnit/interface/GeomDetUnit.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/TrackReco/interface/TrackExtra.h"
#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
#include "TrackingTools/Records/interface/TransientRecHitRecord.h" 
#include "DataFormats/TrackingRecHit/interface/TrackingRecHit.h"
#include "CalibTracker/SiStripHitEfficiency/interface/TrajectoryAtInvalidHit.h"
#include "DataFormats/SiStripDetId/interface/TIBDetId.h"
#include "DataFormats/SiStripDetId/interface/TIDDetId.h"
#include "DataFormats/SiStripDetId/interface/TOBDetId.h"
#include "DataFormats/SiStripDetId/interface/TECDetId.h"
#include "RecoLocalTracker/ClusterParameterEstimator/interface/StripClusterParameterEstimator.h"
#include "TrackingTools/GeomPropagators/interface/AnalyticalPropagator.h"
#include "DataFormats/TrackReco/interface/DeDxData.h"
#include "DataFormats/DetId/interface/DetIdCollection.h"
#include "TrackingTools/DetLayers/interface/DetLayer.h"
#include "RecoTracker/MeasurementDet/interface/MeasurementTracker.h"

#include "RecoTracker/Record/interface/CkfComponentsRecord.h"
#include "AnalysisDataFormats/SiStripClusterInfo/interface/SiStripClusterInfo.h"
#include "CalibTracker/Records/interface/SiStripDetCablingRcd.h"
#include "CalibFormats/SiStripObjects/interface/SiStripDetCabling.h"
#include "CalibTracker/Records/interface/SiStripQualityRcd.h"
#include "CalibFormats/SiStripObjects/interface/SiStripQuality.h"
#include "DataFormats/SiStripDetId/interface/SiStripSubStructure.h"
#include "Geometry/TrackerGeometryBuilder/interface/GluedGeomDet.h"
#include "DataFormats/Common/interface/DetSetVector.h"
#include "DataFormats/Common/interface/DetSetVectorNew.h"
#include "DataFormats/SiStripCluster/interface/SiStripCluster.h" 

#include "DataFormats/MuonReco/interface/Muon.h"
#include "DataFormats/MuonReco/interface/MuonFwd.h"


#include "TMath.h"
#include "TH1F.h"

//
// constructors and destructor
//

using namespace std;
HitEff::HitEff(const edm::ParameterSet& conf) : 
  conf_(conf)
{
  layers =conf_.getParameter<int>("Layer");
  DEBUG = conf_.getParameter<bool>("Debug");
}

// Virtual destructor needed.
HitEff::~HitEff() { }

void HitEff::beginJob(){

  edm::Service<TFileService> fs;

  traj = fs->make<TTree>("traj","tree of trajectory positions");
  traj->Branch("TrajGlbX",&TrajGlbX,"TrajGlbX/F");
  traj->Branch("TrajGlbY",&TrajGlbY,"TrajGlbY/F");
  traj->Branch("TrajGlbZ",&TrajGlbZ,"TrajGlbZ/F");
  traj->Branch("TrajLocX",&TrajLocX,"TrajLocX/F");
  traj->Branch("TrajLocY",&TrajLocY,"TrajLocY/F");
  traj->Branch("TrajLocErrX",&TrajLocErrX,"TrajLocErrX/F");
  traj->Branch("TrajLocErrY",&TrajLocErrY,"TrajLocErrY/F");
  traj->Branch("TrajLocAngleX",&TrajLocAngleX,"TrajLocAngleX/F");
  traj->Branch("TrajLocAngleY",&TrajLocAngleY,"TrajLocAngleY/F");
  traj->Branch("ClusterLocX",&ClusterLocX,"ClusterLocX/F");
  traj->Branch("ClusterLocY",&ClusterLocY,"ClusterLocY/F");
  traj->Branch("ClusterLocErrX",&ClusterLocErrX,"ClusterLocErrX/F");
  traj->Branch("ClusterLocErrY",&ClusterLocErrY,"ClusterLocErrY/F");
  traj->Branch("ClusterStoN",&ClusterStoN,"ClusterStoN/F");
  traj->Branch("ResX",&ResX,"ResX/F");
  traj->Branch("ResXSig",&ResXSig,"ResXSig/F");
  traj->Branch("ModIsBad",&ModIsBad,"ModIsBad/i");
  traj->Branch("SiStripQualBad",&SiStripQualBad,"SiStripQualBad/i");
  traj->Branch("withinAcceptance",&withinAcceptance,"withinAcceptance/O");
  traj->Branch("nHits",&nHits,"nHits/I");
  traj->Branch("nLostHits",&nLostHits,"nLostHits/I");
  traj->Branch("chi2",&chi2,"chi2/F");
  traj->Branch("p",&p,"p/F");
  traj->Branch("pT",&pT,"pT/F");
  traj->Branch("trajHitValid", &trajHitValid, "trajHitValid/i");
  traj->Branch("Id",&Id,"Id/i");
  traj->Branch("run",&run,"run/i");
  traj->Branch("event",&event,"event/i");
  traj->Branch("layer",&whatlayer,"layer/i");
  traj->Branch("timeDT",&timeDT,"timeDT/F");
  traj->Branch("timeDTErr",&timeDTErr,"timeDTErr/F");
  traj->Branch("timeDTDOF",&timeDTDOF,"timeDTDOF/I");
  traj->Branch("timeECAL",&timeECAL,"timeECAL/F");
  traj->Branch("dedx",&dedx,"dedx/F");
  traj->Branch("dedxNOM",&dedxNOM,"dedxNOM/I"); 
  traj->Branch("tquality",&tquality,"tquality/I");
  traj->Branch("istep",&istep,"istep/I");
  traj->Branch("bunchx",&bunchx,"bunchx/I");

  events = 0;
  EventTrackCKF = 0;
  
}


void HitEff::analyze(const edm::Event& e, const edm::EventSetup& es){

  //  bool DEBUG = false;

  if (DEBUG)  cout << "beginning analyze from HitEff" << endl;

  using namespace edm;
  using namespace reco;
  // Step A: Get Inputs 

  int run_nr = e.id().run();
  int ev_nr = e.id().event();
  int bunch_nr = e.bunchCrossing();

  //CombinatoriaTrack
  edm::Handle<reco::TrackCollection> trackCollectionCKF;
  edm::InputTag TkTagCKF = conf_.getParameter<edm::InputTag>("combinatorialTracks");
  e.getByLabel(TkTagCKF,trackCollectionCKF);
  
  edm::Handle<std::vector<Trajectory> > TrajectoryCollectionCKF;
  edm::InputTag TkTrajCKF = conf_.getParameter<edm::InputTag>("trajectories");
  e.getByLabel(TkTrajCKF,TrajectoryCollectionCKF);
  
  // Clusters
  // get the SiStripClusters from the event
  edm::Handle< edmNew::DetSetVector<SiStripCluster> > theClusters;
  e.getByLabel("siStripClusters", theClusters);

  //get tracker geometry
  edm::ESHandle<TrackerGeometry> tracker;
  es.get<TrackerDigiGeometryRecord>().get(tracker);
  const TrackerGeometry * tkgeom=&(* tracker);

  //get Cluster Parameter Estimator
  //std::string cpe = conf_.getParameter<std::string>("StripCPE");
  edm::ESHandle<StripClusterParameterEstimator> parameterestimator;
  es.get<TkStripCPERecord>().get("StripCPEfromTrackAngle", parameterestimator); 
  const StripClusterParameterEstimator &stripcpe(*parameterestimator);

  // get the SiStripQuality records
  edm::ESHandle<SiStripQuality> SiStripQuality_;
  try {
    es.get<SiStripQualityRcd>().get("forCluster",SiStripQuality_);
  }
  catch (...) {
    es.get<SiStripQualityRcd>().get(SiStripQuality_);
  }
  
  edm::ESHandle<MagneticField> magFieldHandle;
  es.get<IdealMagneticFieldRecord>().get(magFieldHandle);
  const MagneticField* magField_ = magFieldHandle.product();

  // get the list of module IDs with FED-detected errors
  edm::Handle< DetIdCollection > fedErrorIds;
  e.getByLabel("siStripDigis", fedErrorIds );

  ESHandle<MeasurementTracker> measurementTrackerHandle;
  es.get<CkfComponentsRecord>().get(measurementTrackerHandle);

  edm::ESHandle<Chi2MeasurementEstimatorBase> est;
  es.get<TrackingComponentsRecord>().get("Chi2",est);

  edm::ESHandle<Propagator> prop;
  es.get<TrackingComponentsRecord>().get("PropagatorWithMaterial",prop);
  const Propagator* thePropagator = prop.product();

  events++;
  
  // *************** SiStripCluster Collection
  const edmNew::DetSetVector<SiStripCluster>& input = *theClusters;

  //go through clusters to write out global position of good clusters for the layer understudy for comparison
  // Loop through clusters just to print out locations

  for (edmNew::DetSetVector<SiStripCluster>::const_iterator DSViter = input.begin(); DSViter != input.end(); DSViter++) {
    // DSViter is a vector of SiStripClusters located on a single module
    unsigned int ClusterId = DSViter->id();
    DetId ClusterDetId(ClusterId);
    const StripGeomDetUnit * stripdet=(const StripGeomDetUnit*)tkgeom->idToDetUnit(ClusterDetId);
    
    edmNew::DetSet<SiStripCluster>::const_iterator begin=DSViter->begin();
    edmNew::DetSet<SiStripCluster>::const_iterator end  =DSViter->end();
    for(edmNew::DetSet<SiStripCluster>::const_iterator iter=begin;iter!=end;++iter) {
      //iter is a single SiStripCluster
      StripClusterParameterEstimator::LocalValues parameters=stripcpe.localParameters(*iter,*stripdet);
      
      const Surface* surface;
      surface = &(tracker->idToDet(ClusterDetId)->surface());
      LocalPoint lp = parameters.first;
      GlobalPoint gp = surface->toGlobal(lp);
      //unsigned int layer = checkLayer(ClusterId);
      //      if(DEBUG) cout << "Found hit in cluster collection layer = " << layer << " with id = " << ClusterId << "   local X position = " << lp.x() << " +- " << sqrt(parameters.second.xx()) << "   matched/stereo/rphi = " << ((ClusterId & 0x3)==0) << "/" << ((ClusterId & 0x3)==1) << "/" << ((ClusterId & 0x3)==2) << endl;
    }
  }
  
  // Tracking 
  const   reco::TrackCollection *tracksCKF=trackCollectionCKF.product();
  if (DEBUG)  cout << "number ckf tracks found = " << tracksCKF->size() << endl;
  //if (tracksCKF->size() == 1 ){
  if (tracksCKF->size() > 0 && tracksCKF->size()<100) {
    if (DEBUG)    cout << "starting checking good event with < 100 tracks" << endl;

    EventTrackCKF++;  

    /*

    //get dEdx info if available
    Handle<ValueMap<DeDxData> >          dEdxUncalibHandle;
    if (e.getByLabel("dedxMedianCTF", dEdxUncalibHandle)) {
      const ValueMap<DeDxData> dEdxTrackUncalib = *dEdxUncalibHandle.product();
      
      reco::TrackRef itTrack  = reco::TrackRef( trackCollectionCKF, 0 );
      dedx = dEdxTrackUncalib[itTrack].dEdx();
      dedxNOM  = dEdxTrackUncalib[itTrack].numberOfMeasurements();
    } else {
      dedx = -999.0; dedxNOM = -999;
    }

    */

    //get muon and ecal timing info if available
    Handle<MuonCollection> muH;
    if(e.getByLabel("muonsWitht0Correction",muH)){
      const MuonCollection & muonsT0  =  *muH.product();
      if(muonsT0.size()!=0) {
        MuonTime mt0 = muonsT0[0].time();
        timeDT = mt0.timeAtIpInOut; 
        timeDTErr = mt0.timeAtIpInOutErr;
        timeDTDOF = mt0.nDof;
        
        bool hasCaloEnergyInfo = muonsT0[0].isEnergyValid();
        if (hasCaloEnergyInfo) timeECAL = muonsT0[0].calEnergy().ecal_time;
      }
    } else {
      timeDT = -999.0; timeDTErr = -999.0; timeDTDOF = -999; timeECAL = -999.0;
    }

    // actually should do a loop over all the tracks in the event here

    for (vector<Trajectory>::const_iterator itraj = TrajectoryCollectionCKF.product()->begin();
         itraj != TrajectoryCollectionCKF.product()->end();
         itraj++) {

      // for each track, fill some variables such as number of hits and momentum
      nHits = itraj->foundHits();
      nLostHits = itraj->lostHits();
      chi2 = (itraj->chiSquared()/itraj->ndof());
      pT = sqrt( ( itraj->lastMeasurement().updatedState().globalMomentum().x() *
                   itraj->lastMeasurement().updatedState().globalMomentum().x()) +
                 ( itraj->lastMeasurement().updatedState().globalMomentum().y() *
                   itraj->lastMeasurement().updatedState().globalMomentum().y()) );
      p = itraj->lastMeasurement().updatedState().globalMomentum().mag();
      
      //Put in code to check track quality
      
      
      std::vector<TrajectoryMeasurement> TMeas=itraj->measurements();
      vector<TrajectoryMeasurement>::iterator itm;
      double xloc = 0.;
      double yloc = 0.;
      double xErr = 0.;
      double yErr = 0.;
      double angleX = -999.;
      double angleY = -999.;
      double xglob,yglob,zglob;
      
      for (itm=TMeas.begin();itm!=TMeas.end();itm++){
        ConstReferenceCountingPointer<TransientTrackingRecHit> theInHit;
        theInHit = (*itm).recHit();
        
        if(DEBUG) cout << "theInHit is valid = " << theInHit->isValid() << endl;
        
        unsigned int iidd = theInHit->geographicalId().rawId();
        
        StripSubdetector strip=StripSubdetector(iidd);
        unsigned int TKlayers = checkLayer(iidd);
        if (DEBUG)      cout << "TKlayer from trajectory: " << TKlayers << "  from module = " << iidd <<  "   matched/stereo/rphi = " << ((iidd & 0x3)==0) << "/" << ((iidd & 0x3)==1) << "/" << ((iidd & 0x3)==2) << endl;

        // If Trajectory measurement from TOB 6 or TEC 9, skip it because it's always valid they are filled later
        if ( TKlayers == 10 || TKlayers == 22 ) {
          if (DEBUG) cout << "skipping original TM for TOB 6 or TEC 9" << endl;
          continue;
        }

        // Make vector of TrajectoryAtInvalidHits to hold the trajectories
        std::vector<TrajectoryAtInvalidHit> TMs;
        
        // Make AnalyticalPropagator to use in TAVH constructor
        AnalyticalPropagator propagator(magField_,anyDirection); 
        
        // for double sided layers check both sensors--if no hit was found on either sensor surface,
        // the trajectory measurements only have one invalid hit entry on the matched surface
        // so get the TrajectoryAtInvalidHit for both surfaces and include them in the study
        if (isDoubleSided(iidd) &&  ((iidd & 0x3)==0) ) {
          // do hit eff check twice--once for each sensor
          //add a TM for each surface
          TMs.push_back(TrajectoryAtInvalidHit(*itm,tkgeom, propagator, 1));
          TMs.push_back(TrajectoryAtInvalidHit(*itm,tkgeom, propagator, 2));
        } else if ( isDoubleSided(iidd) && (!check2DPartner(iidd, TMeas)) ) {
          // if only one hit was found the trajectory measurement is on that sensor surface, and the other surface from
          // the matched layer should be added to the study as well
          TMs.push_back(TrajectoryAtInvalidHit(*itm,tkgeom, propagator, 1));
          TMs.push_back(TrajectoryAtInvalidHit(*itm,tkgeom, propagator, 2));
          if (DEBUG) cout << " found a hit with a missing partner" << endl;
        } else {
          //only add one TM for the single surface and the other will be added in the next iteration
          TMs.push_back(TrajectoryAtInvalidHit(*itm,tkgeom, propagator));
        }

        //Now check for tracks at TOB6 and TEC9

        // to make sure we only propagate on the last TOB5 hit check the next entry isn't also in TOB5
        // to avoid bias, make sure the TOB5 hit is valid (an invalid hit on TOB5 could only exist with a valid hit on TOB6)

        bool isValid = theInHit->isValid();
        bool isLast = (itm==(TMeas.end()-1));
        bool isLastTOB5 = true;
        if (!isLast) {
          if ( checkLayer((++itm)->recHit()->geographicalId().rawId()) == 9 ) isLastTOB5 = false;
          else isLastTOB5 = true;
          --itm;
        }
        
        if ( TKlayers==9 && isValid && isLastTOB5 ) {
          //      if ( TKlayers==9 && itm==TMeas.rbegin()) {
        //        if ( TKlayers==9 && (itm==TMeas.back()) ) {     // to check for only the last entry in the trajectory for propagation
          std::vector< BarrelDetLayer*> barrelTOBLayers = measurementTrackerHandle->geometricSearchTracker()->tobLayers() ;
          const DetLayer* tob6 = barrelTOBLayers[barrelTOBLayers.size()-1];
          const MeasurementEstimator* estimator = est.product();
          const LayerMeasurements* theLayerMeasurements = new LayerMeasurements(&*measurementTrackerHandle);
          const TrajectoryStateOnSurface tsosTOB5 = itm->updatedState();
          vector<TrajectoryMeasurement> tmp = theLayerMeasurements->measurements(*tob6, tsosTOB5, *thePropagator, *estimator);
          
          if ( !tmp.empty()) {
            if (DEBUG) cout << "size of TM from propagation = " << tmp.size() << endl;

            // take the last of the TMs, which is always an invalid hit
            // if no detId is available, ie detId==0, then no compatible layer was crossed
            // otherwise, use that TM for the efficiency measurement
            TrajectoryMeasurement tob6TM(tmp.back());
            ConstReferenceCountingPointer<TransientTrackingRecHit> tob6Hit;
            tob6Hit = tob6TM.recHit();
            
            if (tob6Hit->geographicalId().rawId()!=0) {
              if (DEBUG) cout << "tob6 hit actually being added to TM vector" << endl;
              TMs.push_back(TrajectoryAtInvalidHit(tob6TM,tkgeom, propagator));
            }
          }
        }

        bool isLastTEC8 = true;
        if (!isLast) {
          if ( checkLayer((++itm)->recHit()->geographicalId().rawId()) == 21 ) isLastTEC8 = false;
          else isLastTEC8 = true;
          --itm;
        }
        
        if ( TKlayers==21 && isValid && isLastTEC8 ) {
          
          std::vector< ForwardDetLayer*> posTecLayers = measurementTrackerHandle->geometricSearchTracker()->posTecLayers() ;
          const DetLayer* tec9pos = posTecLayers[posTecLayers.size()-1];
          std::vector< ForwardDetLayer*> negTecLayers = measurementTrackerHandle->geometricSearchTracker()->negTecLayers() ;
          const DetLayer* tec9neg = negTecLayers[negTecLayers.size()-1];
          
          const MeasurementEstimator* estimator = est.product();
          const LayerMeasurements* theLayerMeasurements = new LayerMeasurements(&*measurementTrackerHandle);
          const TrajectoryStateOnSurface tsosTEC9 = itm->updatedState();
          
          // check if track on positive or negative z
          if (!iidd ==  StripSubdetector::TEC) cout << "there is a problem with TEC 9 extrapolation" << endl;
          TECDetId tecdetid(iidd);
          //cout << " tec9 id = " << iidd << " and side = " << tecdetid.side() << endl;
          vector<TrajectoryMeasurement> tmp;
          if ( tecdetid.side() == 1 ) {
            tmp = theLayerMeasurements->measurements(*tec9neg, tsosTEC9, *thePropagator, *estimator);
            //cout << "on negative side" << endl;
          }
          if ( tecdetid.side() == 2 ) {
            tmp = theLayerMeasurements->measurements(*tec9pos, tsosTEC9, *thePropagator, *estimator);
            //cout << "on positive side" << endl;
          }

          if ( !tmp.empty()) {
            // take the last of the TMs, which is always an invalid hit
            // if no detId is available, ie detId==0, then no compatible layer was crossed
            // otherwise, use that TM for the efficiency measurement
            TrajectoryMeasurement tec9TM(tmp.back());
            ConstReferenceCountingPointer<TransientTrackingRecHit> tec9Hit;
            tec9Hit = tec9TM.recHit();
            
            unsigned int tec9id = tec9Hit->geographicalId().rawId();
            if (DEBUG) cout << "tec9id = " << tec9id << " is Double sided = " <<  isDoubleSided(tec9id) << "  and 0x3 = " << (tec9id & 0x3) << endl;
            
            if (tec9Hit->geographicalId().rawId()!=0) {
              if (DEBUG) cout << "tec9 hit actually being added to TM vector" << endl;
              // in tec the hit can be single or doubled sided. whenever the invalid hit at the end of vector of TMs is
              // double sided it is always on the matched surface, so we need to split it into the true sensor surfaces
              if (isDoubleSided(tec9id)) {
                TMs.push_back(TrajectoryAtInvalidHit(tec9TM,tkgeom, propagator, 1));
                TMs.push_back(TrajectoryAtInvalidHit(tec9TM,tkgeom, propagator, 2));
              } else 
                TMs.push_back(TrajectoryAtInvalidHit(tec9TM,tkgeom, propagator));
            }
          } //else cout << "tec9 tmp empty" << endl;
        }
        
        
        // Modules Constraints

        for(std::vector<TrajectoryAtInvalidHit>::const_iterator TM=TMs.begin();TM!=TMs.end();++TM) {
          
          // --> Get trajectory from combinatedState 
          iidd = TM->monodet_id();
          if (DEBUG) cout << "setting iidd = " << iidd << " before checking efficiency and ";
          
          xloc = TM->localX();
          yloc = TM->localY();
          
          xErr =  TM->localErrorX();
          yErr =  TM->localErrorY();
          
          angleX = atan( TM->localDxDz() );
          angleY = atan( TM->localDyDz() );
          
          xglob = TM->globalX();
          yglob = TM->globalY();
          zglob = TM->globalZ();
          withinAcceptance = TM->withinAcceptance();
          
          trajHitValid = TM->validHit();

          // reget layer from iidd here, to account for TOB 6 and TEC 9 TKlayers being off
          TKlayers = checkLayer(iidd);

          if ( (layers == TKlayers) || (layers == 0) ) {   // Look at the layer not used to reconstruct the track
            whatlayer = TKlayers;
            if (DEBUG)    cout << "Looking at layer under study" << endl;
            TrajGlbX = 0.0; TrajGlbY = 0.0; TrajGlbZ = 0.0; ModIsBad = 2; Id = 0; SiStripQualBad = 0; 
            run = 0; event = 0; TrajLocX = 0.0; TrajLocY = 0.0; TrajLocErrX = 0.0; TrajLocErrY = 0.0; 
            TrajLocAngleX = -999.0; TrajLocAngleY = -999.0;     ResX = 0.0; ResXSig = 0.0;
            ClusterLocX = 0.0; ClusterLocY = 0.0; ClusterLocErrX = 0.0; ClusterLocErrY = 0.0; ClusterStoN = 0.0;
            bunchx = 0;
            
            // RPhi RecHit Efficiency 
            
            if (input.size() > 0 ) {  
              if (DEBUG) cout << "Checking clusters with size = " << input.size() << endl;
              int nClusters = 0;
              std::vector< std::vector<float> > VCluster_info; //fill with X residual, X residual pull, local X, sig(X), local Y, sig(Y), StoN
              for (edmNew::DetSetVector<SiStripCluster>::const_iterator DSViter = input.begin(); DSViter != input.end(); DSViter++) {
                // DSViter is a vector of SiStripClusters located on a single module
                //if (DEBUG)      cout << "the ID from the DSViter = " << DSViter->id() << endl; 
                unsigned int ClusterId = DSViter->id();
                if (ClusterId == iidd) {
                  if (DEBUG) cout << "found  (ClusterId == iidd) with ClusterId = " << ClusterId << " and iidd = " << iidd << endl;
                  DetId ClusterDetId(ClusterId);
                  const StripGeomDetUnit * stripdet=(const StripGeomDetUnit*)tkgeom->idToDetUnit(ClusterDetId);
                  
                  for(edmNew::DetSet<SiStripCluster>::const_iterator iter=DSViter->begin();iter!=DSViter->end();++iter) {
                    //iter is a single SiStripCluster
                    StripClusterParameterEstimator::LocalValues parameters=stripcpe.localParameters(*iter,*stripdet);
                    float res = (parameters.first.x() - xloc);
                    float sigma = checkConsistency(parameters , xloc, xErr);
                    // The consistency is probably more accurately measured with the Chi2MeasurementEstimator. To use it
                    // you need a TransientTrackingRecHit instead of the cluster
                    //theEstimator=       new Chi2MeasurementEstimator(30);
                    //const Chi2MeasurementEstimator *theEstimator(100);
                    //theEstimator->estimate(TM->tsos(), TransientTrackingRecHit);
                    
                    //SiStripClusterInfo clusterInfo = SiStripClusterInfo(*iter, es);  
                    // signal to noise from SiStripClusterInfo not working in 225. I'll fix this after the interface
                    // redesign in 300 -ku
                    //float cluster_info[7] = {res, sigma, parameters.first.x(), sqrt(parameters.second.xx()), parameters.first.y(), sqrt(parameters.second.yy()), signal_to_noise};
                    std::vector< float > cluster_info;
                    cluster_info.push_back(res); 
                    cluster_info.push_back(sigma);
                    cluster_info.push_back(parameters.first.x()); 
                    cluster_info.push_back(sqrt(parameters.second.xx()));
                    cluster_info.push_back(parameters.first.y());
                    cluster_info.push_back(sqrt(parameters.second.yy()));
                    //cout << "before getting signal over noise" << endl;
                    //cluster_info.push_back( clusterInfo.signalOverNoise() );
                    //cluster_info.push_back( clusterInfo.getSignalOverNoise() );
                    //cout << "after getting signal over noise" << endl;
                    VCluster_info.push_back(cluster_info);
                    nClusters++;
                    if (DEBUG) cout << "Have ID match. residual = " << VCluster_info.back()[0] << "  res sigma = " << VCluster_info.back()[1] << endl;
                    if (DEBUG) cout << "trajectory measurement compatability estimate = " << (*itm).estimate() << endl;
                    if (DEBUG) cout << "hit position = " << parameters.first.x() << "  hit error = " << sqrt(parameters.second.xx()) << "  trajectory position = " << xloc << "  traj error = " << xErr << endl;
                  }
                }
              }
              float FinalResSig = 1000.0;
              float FinalCluster[7]= {1000.0, 1000.0, 0.0, 0.0, 0.0, 0.0, 0.0};
              if (nClusters > 0) {
                if (DEBUG) cout << "found clusters > 0" << endl;
                if (nClusters > 1) {
                  //get the smallest one
                  vector< vector<float> >::iterator ires;
                  for (ires=VCluster_info.begin(); ires!=VCluster_info.end(); ires++){
                    if ( abs((*ires)[1]) < abs(FinalResSig)) {
                      FinalResSig = (*ires)[1];
                      for (unsigned int i = 0; i<ires->size(); i++) {
                        if (DEBUG) cout << "filling final cluster. i = " << i << " before fill FinalCluster[i]=" << FinalCluster[i] << " and (*ires)[i] =" << (*ires)[i] << endl;
                        FinalCluster[i] = (*ires)[i];
                        if (DEBUG) cout << "filling final cluster. i = " << i << " after fill FinalCluster[i]=" << FinalCluster[i] << " and (*ires)[i] =" << (*ires)[i] << endl;
                      }
                    }
                    if (DEBUG) cout << "iresidual = " << (*ires)[0] << "  isigma = " << (*ires)[1] << "  and FinalRes = " << FinalCluster[0] << endl;
                  }
                }
                else {
                  FinalResSig = VCluster_info.at(0)[1];
                  for (unsigned int i = 0; i<VCluster_info.at(0).size(); i++) {
                    FinalCluster[i] = VCluster_info.at(0)[i];
                  }
                }
                nClusters=0;
                VCluster_info.clear();
              }
              
              if (DEBUG) cout << "Final residual in X = " << FinalCluster[0] << "+-" << (FinalCluster[0]/FinalResSig) << endl;
              if (DEBUG) cout << "Checking location of trajectory: abs(yloc) = " << abs(yloc) << "  abs(xloc) = " << abs(xloc) << endl;
              if (DEBUG) cout << "Checking location of cluster hit: yloc = " << FinalCluster[4] << "+-" << FinalCluster[5] << "  xloc = " << FinalCluster[2] << "+-" << FinalCluster[3] << endl;
              if (DEBUG) cout << "Final cluster signal to noise = " << FinalCluster[6] << endl;
              
              float exclusionWidth = 0.4;
              float TOBexclusion = 0.0;
              float TECexRing5 = -0.89;
              float TECexRing6 = -0.56;
              float TECexRing7 = 0.60;
              //Added by Chris Edelmaier to do TEC bonding exclusion
              int subdetector = ((iidd>>25) & 0x7);            
              int ringnumber = ((iidd>>5) & 0x7);
              
              //New TOB and TEC bonding region exclusion zone
              if((TKlayers >= 5 && TKlayers < 11)||((subdetector == 6)&&( (ringnumber >= 5)&&(ringnumber <=7) ))) {
                //There are only 2 cases that we need to exclude for
                float highzone = 0.0;
                float lowzone = 0.0;
                float higherr = yloc + 5.0*yErr;
                float lowerr = yloc - 5.0*yErr;
                if(TKlayers >= 5 && TKlayers < 11) {
                  //TOB zone
                  highzone = TOBexclusion + exclusionWidth;
                  lowzone = TOBexclusion - exclusionWidth;
                } else if (ringnumber == 5) {
                  //TEC ring 5
                  highzone = TECexRing5 + exclusionWidth;
                  lowzone = TECexRing5 - exclusionWidth;
                } else if (ringnumber == 6) {
                  //TEC ring 6
                  highzone = TECexRing6 + exclusionWidth;
                  lowzone = TECexRing6 - exclusionWidth;
                } else if (ringnumber == 7) {
                  //TEC ring 7
                  highzone = TECexRing7 + exclusionWidth;
                  lowzone = TECexRing7 - exclusionWidth;
                }
                //Now that we have our exclusion region, we just have to properly identify it
                if((highzone <= higherr)&&(highzone >= lowerr)) withinAcceptance = false;
                if((lowzone >= lowerr)&&(lowzone <= higherr)) withinAcceptance = false;
                if((higherr <= highzone)&&(higherr >= lowzone)) withinAcceptance = false;
                if((lowerr >= lowzone)&&(lowerr <= highzone)) withinAcceptance = false;
              }
              
              // fill ntuple varibles
              //get global position from module id number iidd
              TrajGlbX = xglob;
              TrajGlbY = yglob;
              TrajGlbZ = zglob;   
              Id = iidd;
              run = run_nr;
              event = ev_nr;
              bunchx = bunch_nr;
              //if ( SiStripQuality_->IsModuleBad(iidd) ) {
              if ( SiStripQuality_->getBadApvs(iidd)!=0 ) {
                SiStripQualBad = 1; 
                if(DEBUG) cout << "strip is bad from SiStripQuality" << endl;
              } else {
                SiStripQualBad = 0; 
                if(DEBUG) cout << "strip is good from SiStripQuality" << endl;
              }

              //check for FED-detected errors and include those in SiStripQualBad
              for (unsigned int ii=0;ii< fedErrorIds->size();ii++) {
                if (iidd == (*fedErrorIds)[ii].rawId() )
                  SiStripQualBad = 1;
              }
              
              TrajLocX = xloc;
              TrajLocY = yloc;
              TrajLocErrX = xErr;
              TrajLocErrY = yErr;
              TrajLocAngleX = angleX;
              TrajLocAngleY = angleY;
              ResX = FinalCluster[0];
              ResXSig = FinalResSig;
              if (FinalResSig != FinalCluster[1]) if (DEBUG) cout << "Problem with best cluster selection because FinalResSig = " << FinalResSig << " and FinalCluster[1] = " << FinalCluster[1] << endl;
              ClusterLocX = FinalCluster[2];
              ClusterLocY = FinalCluster[4];
              ClusterLocErrX = FinalCluster[3];
              ClusterLocErrY = FinalCluster[5];
              ClusterStoN = FinalCluster[6];
              
              if (DEBUG)              cout << "before check good" << endl;
              
              if ( FinalResSig < 999.0) {  //could make requirement on track/hit consistency, but for
                //now take anything with a hit on the module
                if (DEBUG) cout << "hit being counted as good " << FinalCluster[0] << " FinalRecHit " << 
                  iidd << "   TKlayers  "  <<  TKlayers  << " xloc " <<  xloc << " yloc  " << yloc << " module " << iidd << 
                  "   matched/stereo/rphi = " << ((iidd & 0x3)==0) << "/" << ((iidd & 0x3)==1) << "/" << ((iidd & 0x3)==2) << endl;
                ModIsBad = 0;
                traj->Fill();
              }
              else {
                if (DEBUG)  cout << "hit being counted as bad   ######### Invalid RPhi FinalResX " << FinalCluster[0] << " FinalRecHit " << 
                  iidd << "   TKlayers  "  <<  TKlayers  << " xloc " <<  xloc << " yloc  " << yloc << " module " << iidd << 
                  "   matched/stereo/rphi = " << ((iidd & 0x3)==0) << "/" << ((iidd & 0x3)==1) << "/" << ((iidd & 0x3)==2) << endl;
                ModIsBad = 1;
                traj->Fill();
                
                if (DEBUG) cout << " RPhi Error " << sqrt(xErr*xErr + yErr*yErr) << " ErrorX " << xErr << " yErr " <<  yErr <<  endl;
              } if (DEBUG) cout << "after good location check" << endl;
            } if (DEBUG) cout << "after list of clusters" << endl;
          } if (DEBUG) cout << "After layers=TKLayers if" << endl;
        } if (DEBUG) cout << "After looping over TrajAtValidHit list" << endl;
      } if (DEBUG) cout << "end TMeasurement loop" << endl;
    } if (DEBUG) cout << "end of trajectories loop" << endl;
  }
}

void HitEff::endJob(){
  traj->GetDirectory()->cd();
  traj->Write();  
  
  cout << " Events Analysed             " <<  events          << endl;
  cout << " Number Of Tracked events    " <<  EventTrackCKF   << endl;
}

double HitEff::checkConsistency(StripClusterParameterEstimator::LocalValues parameters, double xx, double xerr) {
  double error = sqrt(parameters.second.xx() + xerr*xerr);
  double separation = abs(parameters.first.x() - xx);
  double consistency = separation/error;
  return consistency;
}

bool HitEff::isDoubleSided(unsigned int iidd) const {
  StripSubdetector strip=StripSubdetector(iidd);
  unsigned int subid=strip.subdetId();
  unsigned int layer = 0;
  if (subid ==  StripSubdetector::TIB) { 
    TIBDetId tibid(iidd);
    layer = tibid.layer();
    if (layer == 1 || layer == 2) return true;
    else return false;
  }
  else if (subid ==  StripSubdetector::TOB) { 
    TOBDetId tobid(iidd);
    layer = tobid.layer() + 4 ; 
    if (layer == 5 || layer == 6) return true;
    else return false;
  }
  else if (subid ==  StripSubdetector::TID) { 
    TIDDetId tidid(iidd);
    layer = tidid.ring() + 10;
    if (layer == 11 || layer == 12) return true;
    else return false;
  }
  else if (subid ==  StripSubdetector::TEC) { 
    TECDetId tecid(iidd);
    layer = tecid.ring() + 13 ; 
    if (layer == 14 || layer == 15 || layer == 18) return true;
    else return false;
  }
  else
    return false;
}

bool HitEff::check2DPartner(unsigned int iidd, std::vector<TrajectoryMeasurement> traj) {
  unsigned int partner_iidd = 0;
  bool found2DPartner = false;
  // first get the id of the other detector
  if ((iidd & 0x3)==1) partner_iidd = iidd+1;
  if ((iidd & 0x3)==2) partner_iidd = iidd-1;
  // next look in the trajectory measurements for a measurement from that detector
  // loop through trajectory measurements to find the partner_iidd
  for (std::vector<TrajectoryMeasurement>::const_iterator iTM=traj.begin(); iTM!=traj.end(); ++iTM) {
    if (iTM->recHit()->geographicalId().rawId()==partner_iidd) {
      found2DPartner = true;
    }
  }
  return found2DPartner;
}

unsigned int HitEff::checkLayer( unsigned int iidd) {
  StripSubdetector strip=StripSubdetector(iidd);
  unsigned int subid=strip.subdetId();
  if (subid ==  StripSubdetector::TIB) { 
    TIBDetId tibid(iidd);
    return tibid.layer();
  }
  if (subid ==  StripSubdetector::TOB) { 
    TOBDetId tobid(iidd);
    return tobid.layer() + 4 ; 
  }
  if (subid ==  StripSubdetector::TID) { 
    TIDDetId tidid(iidd);
    return tidid.wheel() + 10;
  }
  if (subid ==  StripSubdetector::TEC) { 
    TECDetId tecid(iidd);
    return tecid.wheel() + 13 ; 
  }
  return 0;
}

//define this as a plug-in
DEFINE_FWK_MODULE(HitEff);