/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/RecoParticleFlow/PFClusterProducer/interface/PFClusterAlgo.h

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#ifndef RecoParticleFlow_PFClusterProducer_PFClusterAlgo_h
#define RecoParticleFlow_PFClusterProducer_PFClusterAlgo_h

#include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHit.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFwd.h"
#include "DataFormats/ParticleFlowReco/interface/PFLayer.h"
#include "DataFormats/Common/interface/OrphanHandle.h"

#include <string>
#include <vector>
#include <map>
#include <set>

#include <memory>

class TFile;
class TH2F;


class PFClusterAlgo {

 public:

  PFClusterAlgo();

  virtual ~PFClusterAlgo() {;}

  // void init(const std::map<unsigned, reco::PFRecHit* >& rechits );

  void enableDebugging(bool debug) { debug_ = debug;}
 

  typedef edm::Handle< reco::PFRecHitCollection > PFRecHitHandle;
  
  void doClustering( const reco::PFRecHitCollection& rechits );
  void doClustering( const reco::PFRecHitCollection& rechits, const std::vector<bool> & mask );

  void doClustering( const PFRecHitHandle& rechitsHandle );
  void doClustering( const PFRecHitHandle& rechitsHandle, const std::vector<bool> & mask );
  
  
  void setThreshBarrel(double thresh) {threshBarrel_ = thresh;}
  void setThreshPtBarrel(double thresh) {threshPtBarrel_ = thresh;}

  void setThreshSeedBarrel(double thresh) {threshSeedBarrel_ = thresh;}
  void setThreshPtSeedBarrel(double thresh) {threshPtSeedBarrel_ = thresh;}

  void setThreshCleanBarrel(double thresh) {threshCleanBarrel_ = thresh;}
  void setS4S1CleanBarrel(const std::vector<double>& coeffs) {minS4S1Barrel_ = coeffs;}

  void setThreshDoubleSpikeBarrel( double thresh ) { threshDoubleSpikeBarrel_ = thresh;}
  void setS6S2DoubleSpikeBarrel( double cut ) { minS6S2DoubleSpikeBarrel_ = cut;}

  void setThreshEndcap(double thresh) {threshEndcap_ = thresh;}
  void setThreshPtEndcap(double thresh) {threshPtEndcap_ = thresh;}

  void setThreshSeedEndcap(double thresh) {threshSeedEndcap_ = thresh;}
  void setThreshPtSeedEndcap(double thresh) {threshPtSeedEndcap_ = thresh;}

  void setThreshCleanEndcap(double thresh) {threshCleanEndcap_ = thresh;}
  void setS4S1CleanEndcap(const std::vector<double>& coeffs) {minS4S1Endcap_ = coeffs;}

  void setThreshDoubleSpikeEndcap( double thresh ) { threshDoubleSpikeEndcap_ = thresh;}
  void setS6S2DoubleSpikeEndcap( double cut ) { minS6S2DoubleSpikeEndcap_ = cut;}

  void setHistos(TFile* file, TH2F* hB, TH2F* hE) {file_=file; hBNeighbour = hB; hENeighbour = hE;}

  void setNNeighbours(int n) { nNeighbours_ = n;}

  void setPosCalcP1( double p1 ) { posCalcP1_ = p1; }

  void setPosCalcNCrystal(int n) { posCalcNCrystal_ = n;}

  void setShowerSigma( double sigma ) { showerSigma_ = sigma;}

  void setUseCornerCells( bool usecornercells ) { useCornerCells_ = usecornercells;}
  
  void setCleanRBXandHPDs( bool cleanRBXandHPDs) { cleanRBXandHPDs_ = cleanRBXandHPDs; }

 
  double threshBarrel() const {return threshBarrel_;}

  double threshSeedBarrel() const  {return threshSeedBarrel_;}


  double threshEndcap() const {return threshEndcap_;}

  double threshSeedEndcap() const {return threshSeedEndcap_;}


  int nNeighbours() const { return nNeighbours_;}

  double posCalcP1() const { return posCalcP1_; }

  int posCalcNCrystal() const {return  posCalcNCrystal_;}

  double showerSigma() const { return showerSigma_ ;}

  void write();



  const reco::PFRecHit& rechit(unsigned i,
                               const reco::PFRecHitCollection& rechits );

  bool masked(unsigned rhi) const;

  enum Color { 
    NONE=0,
    SEED, 
    SPECIAL 
  };

  unsigned color(unsigned rhi) const;

  bool isSeed(unsigned rhi) const;

  std::auto_ptr< std::vector< reco::PFCluster > >& clusters()  
    {return pfClusters_;}

  std::auto_ptr< std::vector< reco::PFRecHit > >& rechitsCleaned()  
    {return pfRecHitsCleaned_;}


  enum Parameter { THRESH, 
                   SEED_THRESH,
                   PT_THRESH,
                   SEED_PT_THRESH,
                   CLEAN_THRESH,
                   CLEAN_S4S1,
                   DOUBLESPIKE_THRESH,
                   DOUBLESPIKE_S6S2
  };
  

    double parameter( Parameter paramtype, PFLayer::Layer layer, unsigned iCoeff = 0, int iring0=0) const; 

  
  enum SeedState {
    UNKNOWN=-1,
    NO=0,
    YES=1,
    CLEAN=2
  };


  friend std::ostream& operator<<(std::ostream& out,const PFClusterAlgo& algo);

  typedef std::map<unsigned, unsigned >::const_iterator IDH;
  typedef std::multimap<double, unsigned >::iterator EH;
 

 private:
  void doClusteringWorker( const reco::PFRecHitCollection& rechits );

  void cleanRBXAndHPD( const reco::PFRecHitCollection& rechits );

  void findSeeds( const reco::PFRecHitCollection& rechits );

  void buildTopoClusters( const reco::PFRecHitCollection& rechits ); 

  void buildTopoCluster( std::vector< unsigned >& cluster, unsigned rhi, 
                         const reco::PFRecHitCollection& rechits ); 
  
  void buildPFClusters( const std::vector< unsigned >& cluster, 
                        const reco::PFRecHitCollection& rechits ); 

  void calculateClusterPosition( reco::PFCluster& cluster, 
                                 reco::PFCluster& clusterwodepthcor,
                                 bool depcor = true,
                                 int posCalcNCrystal=0);
  
  reco::PFRecHitRef  createRecHitRef( const reco::PFRecHitCollection& rechits, 
                                      unsigned rhi );

  void paint( unsigned rhi, unsigned color=1 );

  std::pair<double,double> dCrack(double phi, double eta);
  

  PFRecHitHandle           rechitsHandle_;   

  std::set<unsigned>       idUsedRecHits_;

  std::multimap<double, unsigned, std::greater<double> >  eRecHits_;

  std::vector< bool >      mask_;

  std::vector< unsigned >  color_;

  std::vector< SeedState > seedStates_;

  std::vector< bool >      usedInTopo_;

  std::vector< unsigned >  seeds_; 

  std::vector< std::vector< unsigned > > topoClusters_;

  // std::vector< reco::PFCluster >  allClusters_;

  std::auto_ptr< std::vector<reco::PFCluster> > pfClusters_;
  
  std::auto_ptr< std::vector<reco::PFRecHit> > pfRecHitsCleaned_;
  
  double threshBarrel_;
  double threshPtBarrel_;

  double threshSeedBarrel_;
  double threshPtSeedBarrel_;

  double threshEndcap_;
  double threshPtEndcap_;

  double threshSeedEndcap_;
  double threshPtSeedEndcap_;

  double threshCleanBarrel_;
  std::vector<double> minS4S1Barrel_;

  double threshDoubleSpikeBarrel_;
  double minS6S2DoubleSpikeBarrel_;

  double threshCleanEndcap_;
  std::vector<double> minS4S1Endcap_;

  double threshDoubleSpikeEndcap_;
  double minS6S2DoubleSpikeEndcap_;

  int    nNeighbours_;

  int    posCalcNCrystal_;

  double posCalcP1_;

  double showerSigma_;

  bool useCornerCells_;

  bool cleanRBXandHPDs_;

  bool   debug_;


  static  unsigned  prodNum_;

  // Histograms
  TH2F* hBNeighbour;
  TH2F* hENeighbour;
  TFile*     file_; 

};

#endif