/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/TrackingTools/TrackFitters/interface/KFFittingSmoother.h

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#ifndef CD_KFFittingSmoother_H_
#define CD_KFFittingSmoother_H_

#include "TrackingTools/PatternTools/interface/TrajectorySmoother.h"
#include "TrackingTools/TrackFitters/interface/TrajectoryFitter.h"
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
#include "TrackingTools/TrackFitters/interface/TrajectoryStateWithArbitraryError.h"

class KFFittingSmoother : public TrajectoryFitter {

public:
  KFFittingSmoother(const TrajectoryFitter& aFitter,
                    const TrajectorySmoother& aSmoother,
                    double estimateCut = -1,
                    double logPixelProbabilityCut = -16.0, 
                    int minNumberOfHits = 5,
                    bool rejectTracks = false,
                    bool BreakTrajWith2ConsecutiveMissing = false,
                    bool NoInvalidHitsBeginEnd = false) :
    theFitter(aFitter.clone()),
    theSmoother(aSmoother.clone()),
    theEstimateCut(estimateCut),

    // ggiurgiu@fnal.gov
    theLogPixelProbabilityCut( logPixelProbabilityCut ),
    
    theMinNumberOfHits(minNumberOfHits),
    rejectTracksFlag(rejectTracks),
    breakTrajWith2ConsecutiveMissing(BreakTrajWith2ConsecutiveMissing),
    noInvalidHitsBeginEnd(NoInvalidHitsBeginEnd) {}
  
  virtual ~KFFittingSmoother();
  
  virtual std::vector<Trajectory> fit(const Trajectory& t) const;
  virtual std::vector<Trajectory> fit(const TrajectorySeed& aSeed,
                                 const RecHitContainer& hits, 
                                 const TrajectoryStateOnSurface& firstPredTsos) const;
  virtual std::vector<Trajectory> fit(const TrajectorySeed& aSeed,
                                 const RecHitContainer& hits) const;

  const TrajectoryFitter* fitter() const {return theFitter;}
  const TrajectorySmoother* smoother() const {return theSmoother;}

  KFFittingSmoother* clone() const {
    return new KFFittingSmoother(*theFitter,*theSmoother,
                                 theEstimateCut,theLogPixelProbabilityCut,
                                 theMinNumberOfHits,rejectTracksFlag,
                                 breakTrajWith2ConsecutiveMissing,noInvalidHitsBeginEnd);
  }
  
private:

  const TrajectoryFitter* theFitter;
  const TrajectorySmoother* theSmoother;
  double theEstimateCut;

  double theLogPixelProbabilityCut; // ggiurgiu@fnal.gov

  int theMinNumberOfHits;
  bool rejectTracksFlag;
  bool breakTrajWith2ConsecutiveMissing;
  bool noInvalidHitsBeginEnd;
  
  void smoothingStep(std::vector<Trajectory>& fitted, std::vector<Trajectory> & smoothed) const;
  TrajectoryStateWithArbitraryError   tsosWithError;

  bool checkForNans(const Trajectory &theTraj) const;
  
};

#endif //CD_KFFittingSmoother_H_