/** CbmLitTrackFinderNNScalarElectron.h
 * @author Andrey Lebedev <andrey.lebedev@gsi.de>
 * @since 2009
 * @version 1.0
 **
 ** Scalar version of the nearest neighbor tracking adopted for
 ** the 'electron' setup of the CBM experiment.
 ** As input to tracking arrays with track seeds
 ** and hits from the detector are used. The track is prolongated
 ** from station to station and the nearest hit is attached to track.
 ** Threading Building Blocks library is used for multithreading.
 **/

#ifndef LITTRACKFINDERNNSCALARELECTRON_H_
#define LITTRACKFINDERNNSCALARELECTRON_H_

//#include "LitHit.h"
//#include "LitTrack.h"
#include "LitDetectorGeometryElectron.h"
#include "LitHitDataElectron.h"
#include "../LitTrackFinderNNBase.h"
#include "../LitTrackFinder.h"
#include "LitTrackFinderNNBaseElectron.h"

//#include "CbmLitPtrTypes.h"

//class CbmLitField;

namespace lit {
namespace parallel {

class LitTrackFinderNNScalarElectron : public LitTrackFinderNNBaseElectronScal,
   public LitTrackFinderNNBase,
   public LitTrackFinder
{
public:
   /* Constructor */
   LitTrackFinderNNScalarElectron();

   /* Destructor */
   virtual ~LitTrackFinderNNScalarElectron();

   /* Inherited from LitTrackFinder */
   virtual void DoFind(
      LitScalPixelHit* hits[],
      unsigned int nofHits,
      LitScalTrack* trackSeeds[],
      unsigned int nofTrackSeeds,
      LitScalTrack* tracks[],
      unsigned int& nofTracks);

   void SetDetectorLayout(
      LitDetectorLayoutElectronScal& layout) {
      fLayout = layout;
      fHitData.SetDetectorLayout(layout);
   }

public:
   void FollowTracks();

   void PropagateToFirstStation(
      LitScalTrack* track);

   void FollowTrack(
      LitScalTrack* track);

   bool ProcessStationGroup(
      LitScalTrack* track,
      int stationGroup);

   bool ProcessStation(
      LitScalTrack* track,
      int stationGroup,
      int station);

   bool AddNearestHit(
      LitScalTrack* track,
      const std::pair<unsigned int, unsigned int>& hits,
      LitTrackParamScal* par,
      int stationGroup,
      int station);

//private:
// TrackExtrapolatorPtr fExtrapolator;
// TrackPropagatorPtr fPropagator;
// TrackUpdatePtr fFilter;
// CbmLitField* fField;
};

} // namespace parallel
} // namespace lit
#endif /* LITTRACKFINDERNNSCALARELECTRON_H_ */