/*
 This file is property of and copyright by the ALICE HLT Project        *
 ALICE Experiment at CERN, All rights reserved.                         *
 See cxx source for full Copyright notice                               *
*/
#ifndef ALIHLTTPCCANEIGHBOURSFINDER_H
#define ALIHLTTPCCANEIGHBOURSFINDER_H

#include "AliHLTTPCCATracker.h"

#ifdef USE_TBB
namespace tbb
{
  template<typename T> class blocked_range;
} // namespace tbb
#endif //USE_TBB


/**
 * @class AliHLTTPCCANeighboursFinder
 */
class AliHLTTPCCATracker::NeighboursFinder
{
 public:
  class ExecuteOnRow;
  NeighboursFinder( int iIter, nested_my<AliHLTTPCCARowHit>& rows_ArBB, const dense<f32>& rowsX ) :  fRows_ArBB(rows_ArBB), fRowsX(rowsX), fIter(iIter)  {}
  void execute();
  
#ifdef USE_TBB
  void operator()( const tbb::blocked_range<int> &r ) const;
#endif //USE_TBB
  
 private:
    // for use ArBB
  nested_my<AliHLTTPCCARowHit>& fRows_ArBB;
  const dense<f32>& fRowsX;
  struct FindNeighboursOnRowParam { // param to use in FindNeighboursOnRow_ArBB
    f32 neighbourAreaSizeTgY;
    f32 neighbourAreaSizeTgZ;
    f32 neighbourChiCut;
  };

  static void FindNeighboursOnRow_ArBB( nested_my<AliHLTTPCCARowHit>& rows, const dense<f32>& rowsX, const u8 rowIndex, const FindNeighboursOnRowParam& param );
    // end for use ArBB

  void executeOnRow( TRowI_ArBB rowIndex );

  // AliHLTTPCCATracker *fTracker;
  // SliceData &fData;
  int fIter; // current iteration of finding
};


#endif