/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/SUSYBSMAnalysis/HSCP/src/HSCParticleProducer.cc

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// -*- C++ -*-
//
// Package:    HSCParticleProducer
// Class:      HSCParticleProducer
// 
//
// Original Author:  Rizzi Andrea
// Reworked and Ported to CMSSW_3_0_0 by Christophe Delaere
//         Created:  Wed Oct 10 12:01:28 CEST 2007
// $Id: HSCParticleProducer.cc,v 1.19 2011/04/20 09:17:15 querten Exp $
//
//

// user include files
#include "SUSYBSMAnalysis/HSCP/interface/HSCParticleProducer.h"

using namespace susybsm;
using namespace reco;

HSCParticleProducer::HSCParticleProducer(const edm::ParameterSet& iConfig) {
  using namespace edm;
  using namespace std;

  // the Act as Event filter
   Filter_        = iConfig.getParameter<bool>          ("filter");

  // the input collections
  m_trackTag      = iConfig.getParameter<edm::InputTag>("tracks");
  m_muonsTag      = iConfig.getParameter<edm::InputTag>("muons");
  m_trackIsoTag   = iConfig.getParameter<edm::InputTag>("tracksIsolation");

  useBetaFromTk   = iConfig.getParameter<bool>    ("useBetaFromTk"  );
  useBetaFromMuon = iConfig.getParameter<bool>    ("useBetaFromMuon");
  useBetaFromRpc  = iConfig.getParameter<bool>    ("useBetaFromRpc" );
  useBetaFromEcal = iConfig.getParameter<bool>    ("useBetaFromEcal");

  // the parameters
  minTkP          = iConfig.getParameter<double>  ("minTkP");       // 30
  maxTkChi2       = iConfig.getParameter<double>  ("maxTkChi2");    // 5
  minTkHits       = iConfig.getParameter<uint32_t>("minTkHits");    // 9
  minMuP          = iConfig.getParameter<double>  ("minMuP");       // 30
  minDR           = iConfig.getParameter<double>  ("minDR");        // 0.1
  maxInvPtDiff    = iConfig.getParameter<double>  ("maxInvPtDiff"); // 0.005

  if(useBetaFromTk  )beta_calculator_TK   = new BetaCalculatorTK  (iConfig);
  if(useBetaFromMuon)beta_calculator_MUON = new BetaCalculatorMUON(iConfig);
  if(useBetaFromRpc )beta_calculator_RPC  = new BetaCalculatorRPC (iConfig);
  if(useBetaFromEcal)beta_calculator_ECAL = new BetaCalculatorECAL(iConfig);

  // Load all the selections
  std::vector<edm::ParameterSet> SelectionParameters = iConfig.getParameter<std::vector<edm::ParameterSet> >("SelectionParameters");
  for(unsigned int i=0;i<SelectionParameters.size();i++){
     Selectors.push_back(new CandidateSelector(SelectionParameters[i]) );
  }

  // what I produce
  produces<susybsm::HSCParticleCollection >();
  if(useBetaFromEcal)produces<susybsm::HSCPCaloInfoCollection >();

}

HSCParticleProducer::~HSCParticleProducer() {
   // do anything here that needs to be done at desctruction time
   // (e.g. close files, deallocate resources etc.)
}

//
// member functions
//

// ------------ method called to produce the data  ------------
bool
HSCParticleProducer::filter(edm::Event& iEvent, const edm::EventSetup& iSetup) {

  using namespace edm;
  using namespace reco;
  using namespace std;
  using namespace susybsm;

  // information from the muons
  edm::Handle<reco::MuonCollection> muonCollectionHandle;
  iEvent.getByLabel(m_muonsTag,muonCollectionHandle);

  // information from the tracks
  edm::Handle<reco::TrackCollection> trackCollectionHandle;
  iEvent.getByLabel(m_trackTag,trackCollectionHandle);

  // information from the tracks iso
  edm::Handle<reco::TrackCollection> trackIsoCollectionHandle;
  iEvent.getByLabel(m_trackIsoTag,trackIsoCollectionHandle);


  // creates the output collection
  susybsm::HSCParticleCollection* hscp = new susybsm::HSCParticleCollection; 
  std::auto_ptr<susybsm::HSCParticleCollection> result(hscp);

  susybsm::HSCPCaloInfoCollection* caloInfoColl = new susybsm::HSCPCaloInfoCollection;
  std::auto_ptr<susybsm::HSCPCaloInfoCollection> caloInfoCollaptr(caloInfoColl);


  // Fill the output collection with HSCP Candidate (the candiate only contains ref to muon AND/OR track object)
  *hscp = getHSCPSeedCollection(trackCollectionHandle, muonCollectionHandle);

  // find the track ref for isolation purposed (main track is supposed to be the Iso track after refitting)
  for(susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin(); hscpcandidate != hscp->end(); ++hscpcandidate) {
      // Matching is needed because input track collection and muon inner track may lightly differs due to track refit
      reco::TrackRef track  = hscpcandidate->trackRef();
      if(track.isNull())continue;
      float dRMin=1000; int found = -1;
      for(unsigned int t=0; t<trackIsoCollectionHandle->size();t++) {
         reco::TrackRef Isotrack  = reco::TrackRef( trackIsoCollectionHandle, t );
         if( fabs( (1.0/track->pt())-(1.0/Isotrack->pt())) > maxInvPtDiff) continue;
         float dR = deltaR(track->momentum(), Isotrack->momentum());
         if(dR <= minDR && dR < dRMin){ dRMin=dR; found = t;}
      }
      if(found>=0)hscpcandidate->setTrackIso(reco::TrackRef( trackIsoCollectionHandle, found ));  
  }

  // compute the TRACKER contribution
  if(useBetaFromTk){
  for(susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin(); hscpcandidate != hscp->end(); ++hscpcandidate) {
    beta_calculator_TK->addInfoToCandidate(*hscpcandidate,  iEvent,iSetup);
  }}

  // compute the MUON contribution
  if(useBetaFromMuon){
  for(susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin(); hscpcandidate != hscp->end(); ++hscpcandidate) {
    beta_calculator_MUON->addInfoToCandidate(*hscpcandidate,  iEvent,iSetup);
  }}

  // compute the RPC contribution
  if(useBetaFromRpc){
  for(susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin(); hscpcandidate != hscp->end(); ++hscpcandidate) {
      beta_calculator_RPC->addInfoToCandidate(*hscpcandidate, iEvent, iSetup);
  }}

  // compute the ECAL contribution
//  auto_ptr<ValueMap<HSCPCaloInfo> > CaloInfoMap(new ValueMap<HSCPCaloInfo> );
//  ValueMap<HSCPCaloInfo>::Filler    filler(*CaloInfoMap);
//  std::vector<HSCPCaloInfo> CaloInfoColl(hscp->size());
   if(useBetaFromEcal){
  int Index=0;
  caloInfoColl->resize(hscp->size());
  for(susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin(); hscpcandidate != hscp->end(); ++hscpcandidate, Index++) {
     beta_calculator_ECAL->addInfoToCandidate(*hscpcandidate,trackCollectionHandle,iEvent,iSetup, (*caloInfoColl)[Index]);
  }}

  // cleanup the collection based on the input selection
  for(int i=0;i<(int)hscp->size();i++) {
     susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin() + i;
     bool decision = false;
     for(unsigned int s=0;s<Selectors.size();s++){decision |= Selectors[s]->isSelected(*hscpcandidate);}
     if(!decision){
        hscp->erase(hscpcandidate);
        if(useBetaFromEcal)caloInfoColl->erase(caloInfoColl->begin() + i);
        i--;
     }
  }
  bool filterResult = !Filter_ || (Filter_ && hscp->size()>=1);




  // output result
  if(useBetaFromEcal){
    edm::OrphanHandle<susybsm::HSCPCaloInfoCollection> caloInfoHandle= iEvent.put(caloInfoCollaptr);
    // adding the reftoCaloInfoObject to the HSCP Object
    for(int i=0;i<(int)hscp->size();i++) {
       susybsm::HSCParticleCollection::iterator hscpcandidate = hscp->begin() + i;
       hscpcandidate->setCaloInfo(HSCPCaloInfoRef(caloInfoHandle,i));
    }
  }


  // output result
  

  edm::OrphanHandle<susybsm::HSCParticleCollection> putHandle = iEvent.put(result); 
//  if(useBetaFromEcal){
//      edm::RefProd<susybsm::HSCParticleCollection> hscpCollectionHandle = iEvent.getRefBeforePut<susybsm::HSCParticleCollection>();
//    filler.insert(putHandle, CaloInfoColl.begin(), CaloInfoColl.end());
//    filler.fill();
//    iEvent.put(CaloInfoMap);
//  }

  return filterResult;
}

// ------------ method called once each job just before starting event loop  ------------
void 
HSCParticleProducer::beginJob() {
}

// ------------ method called once each job just after ending the event loop  ------------
void 
HSCParticleProducer::endJob() {
}

std::vector<HSCParticle> HSCParticleProducer::getHSCPSeedCollection(edm::Handle<reco::TrackCollection>& trackCollectionHandle,  edm::Handle<reco::MuonCollection>& muonCollectionHandle)
{
   std::vector<HSCParticle> HSCPCollection;

   // Store a local vector of track ref (that can be modified if matching)
   std::vector<reco::TrackRef> tracks;
   for(unsigned int i=0; i<trackCollectionHandle->size(); i++){
      TrackRef track = reco::TrackRef( trackCollectionHandle, i );
      if(track->p()<minTkP || (track->chi2()/track->ndof())>maxTkChi2 || track->found()<minTkHits)continue;
      tracks.push_back( track );
   }

   // Loop on muons with inner track ref and create Muon HSCP Candidate
   for(unsigned int m=0; m<muonCollectionHandle->size(); m++){
      reco::MuonRef muon  = reco::MuonRef( muonCollectionHandle, m );
      if(muon->p()<minMuP )continue;
      TrackRef innertrack = muon->innerTrack();
      if(innertrack.isNull())continue;

      // Check if the inner track match any track in order to create a Muon+Track HSCP Candidate
      // Matching is needed because input track collection and muon inner track may lightly differs due to track refit
      float dRMin=1000; int found = -1;
      for(unsigned int t=0; t<tracks.size();t++) {
         reco::TrackRef track  = tracks[t];
         if( fabs( (1.0/innertrack->pt())-(1.0/track->pt())) > maxInvPtDiff) continue;
         float dR = deltaR(innertrack->momentum(), track->momentum());
         if(dR <= minDR && dR < dRMin){ dRMin=dR; found = t;}           
      }

      HSCParticle candidate;
      candidate.setMuon(muon);
      if(found>=0){
//        printf("MUON with Inner Track Matching --> DR = %6.2f (%6.2f %+6.2f %+6.2f):(%6.2f %+6.2f %+6.2f) vs (%6.2f %+6.2f %+6.2f)\n",dRMin,muon->pt(), muon->eta(), muon->phi(), innertrack->pt(), innertrack->eta(), innertrack->phi(), tracks[found]->pt(), tracks[found]->eta(), tracks[found]->phi() );
        candidate.setTrack(tracks[found]);
        tracks.erase(tracks.begin()+found);
      }
      HSCPCollection.push_back(candidate);
   }

   // Loop on muons without inner tracks and create Muon HSCP Candidate
   for(unsigned int m=0; m<muonCollectionHandle->size(); m++){
      reco::MuonRef muon  = reco::MuonRef( muonCollectionHandle, m );
      if(muon->p()<minMuP)continue;
      TrackRef innertrack = muon->innerTrack();
      if(innertrack.isNonnull())continue;

      // Check if the muon match any track in order to create a Muon+Track HSCP Candidate
      float dRMin=1000; int found = -1;
      for(unsigned int t=0; t<tracks.size();t++) {
         reco::TrackRef track  = tracks[t];
         if( fabs( (1.0/muon->pt())-(1.0/track->pt())) > maxInvPtDiff) continue;
         float dR = deltaR(muon->momentum(), track->momentum());
         if(dR <= minDR && dR < dRMin){ dRMin=dR; found = t;}
      }

      HSCParticle candidate;
      candidate.setMuon(muon);
      if(found>=0){
//        printf("MUON without Inner Track Matching --> DR = %6.2f (%6.2f %+6.2f %+6.2f) vs (%6.2f %+6.2f %+6.2f)\n",dRMin,muon->pt(), muon->eta(), muon->phi(), tracks[found]->pt(), tracks[found]->eta(), tracks[found]->phi() );
        candidate.setTrack(tracks[found]);
        tracks.erase(tracks.begin()+found);
      }
      HSCPCollection.push_back(candidate);
   }

   // Loop on tracks not matching muon and create Track HSCP Candidate
   for(unsigned int i=0; i<tracks.size(); i++){
      HSCParticle candidate;
      candidate.setTrack(tracks[i]);
      HSCPCollection.push_back(candidate);
   }

   return HSCPCollection;
}

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