FastTSGFromPropagation.h

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#ifndef FastSimulation_Muons_FastTSGFromPropagation_H
#define FastSimulation_Muons_FastTSGFromPropagation_H

#include "RecoMuon/TrackerSeedGenerator/interface/TrackerSeedGenerator.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/EDGetToken.h"
#include "TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h"
#include "RecoMuon/TrackingTools/interface/MuonServiceProxy.h"
#include "TrackingTools/PatternTools/interface/TrajectoryMeasurement.h"
#include "TrackingTools/PatternTools/interface/TrajectoryStateUpdator.h"
#include "RecoMuon/TrackingTools/interface/MuonErrorMatrix.h"
#include "DataFormats/BeamSpot/interface/BeamSpot.h"
#include "TrackingTools/MeasurementDet/interface/LayerMeasurements.h"

#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
#include "MagneticField/Engine/interface/MagneticField.h"
#include "SimDataFormats/Track/interface/SimTrackContainer.h"

#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHitBuilder.h"
#include "RecoTracker/TransientTrackingRecHit/interface/TkTransientTrackingRecHitBuilder.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"

#include "DataFormats/TrackerRecHit2D/interface/FastTrackerRecHitCollection.h"
#include "DataFormats/TrackerRecHit2D/interface/FastTrackerRecHit.h"

#include <memory>


class LayerMeasurements;
class Chi2MeasurementEstimator;
class Propagator;
class MeasurementTracker;
class GeometricSearchTracker;
class DirectTrackerNavigation;
class TrajectoryStateTransform;
class SimTrack;
class TrackerGeometry;
class TrackerTopology;


class FastTSGFromPropagation : public TrackerSeedGenerator {
    public:
  FastTSGFromPropagation(const edm::ParameterSet &pset,edm::ConsumesCollector& iC);
  
  FastTSGFromPropagation(const edm::ParameterSet& par, const MuonServiceProxy*,edm::ConsumesCollector& iC);
    
  ~FastTSGFromPropagation() override;

  void  trackerSeeds(const TrackCand&, const TrackingRegion&, 
             const TrackerTopology *tTopo, std::vector<TrajectorySeed>&) override;
    
  void init(const MuonServiceProxy*) override;

  void setEvent(const edm::Event&) override;

private:
    void stateOnDet(const TrajectoryStateOnSurface& ts,
                      unsigned int detid,
              PTrajectoryStateOnDet& pts) const;

  TrajectoryStateOnSurface innerState(const TrackCand&) const;

  TrajectoryStateOnSurface outerTkState(const TrackCand&) const;

  const LayerMeasurements* tkLayerMeasurements() const { return &theTkLayerMeasurements; } 

  const TrajectoryStateUpdator* updator() const {return theUpdator.get();}

  const Chi2MeasurementEstimator* estimator() const { return theEstimator.get(); }

  edm::ESHandle<Propagator> propagator() const {return theService->propagator(thePropagatorName); }

  TrajectorySeed createSeed(const TrajectoryStateOnSurface&, const DetId&) const;

  TrajectorySeed createSeed(const TrajectoryStateOnSurface& tsos, const edm::OwnVector<TrackingRecHit>& container, const DetId& id) const;

  void validMeasurements(std::vector<TrajectoryMeasurement>&) const;

  std::vector<TrajectoryMeasurement> findMeasurements_new(const DetLayer*, const TrajectoryStateOnSurface&) const;

  std::vector<TrajectoryMeasurement> findMeasurements(const DetLayer*, const TrajectoryStateOnSurface&) const;

  bool passSelection(const TrajectoryStateOnSurface&) const;

  void getRescalingFactor(const TrackCand& staMuon);

  void adjust(FreeTrajectoryState &) const;

  void adjust(TrajectoryStateOnSurface &) const;

  double dxyDis(const TrajectoryStateOnSurface& tsos) const;

  double zDis(const TrajectoryStateOnSurface& tsos) const;

  struct increasingEstimate{
    bool operator()(const TrajectoryMeasurement& lhs,
                    const TrajectoryMeasurement& rhs) const{ 
      return lhs.estimate() < rhs.estimate();
    }
  };

  struct isInvalid {
    bool operator()(const TrajectoryMeasurement& measurement) {
      return ( ((measurement).recHit() == nullptr) || !((measurement).recHit()->isValid()) || !((measurement).updatedState().isValid()) ); 
    }
  };

  unsigned long long theCacheId_MT;
  unsigned long long theCacheId_TG;

  std::string theCategory;

  LayerMeasurements  theTkLayerMeasurements;

  edm::ESHandle<GeometricSearchTracker> theTracker;

  edm::ESHandle<MeasurementTracker> theMeasTracker;

  std::unique_ptr<const DirectTrackerNavigation> theNavigation;

  const TrackerGeometry*  theGeometry;

  const MuonServiceProxy* theService;

  std::unique_ptr<const TrajectoryStateUpdator> theUpdator;

  std::unique_ptr<const Chi2MeasurementEstimator> theEstimator;

  double theMaxChi2;

  double theFlexErrorRescaling;

  double theFixedErrorRescaling;

  bool theUseVertexStateFlag;

  bool theUpdateStateFlag;

  std::string theResetMethod; 

  bool theSelectStateFlag;

  std::string thePropagatorName;

  std::unique_ptr<MuonErrorMatrix> theErrorMatrixAdjuster;

  bool theAdjustAtIp;

  double theSigmaZ; 

  const edm::ParameterSet theConfig;
  edm::EDGetTokenT<edm::SimTrackContainer> theSimTrackCollectionToken_;
  edm::EDGetTokenT<FastTrackerRecHitCombinationCollection>  recHitCombinationsToken_;
  edm::EDGetTokenT<reco::BeamSpot> beamSpot_;
  edm::EDGetTokenT<MeasurementTrackerEvent> theMeasurementTrackerEventToken_;

  edm::Handle<reco::BeamSpot> theBeamSpot;
  edm::Handle<edm::SimTrackContainer> theSimTracks;
  edm::Handle<FastTrackerRecHitCombinationCollection> recHitCombinations;
  edm::Handle<MeasurementTrackerEvent> theMeasTrackerEvent;
  edm::ESHandle<TransientTrackingRecHitBuilder> theTTRHBuilder;

};

#endif