/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/CalibMuon/CSCCalibration/interface/CSCIndexerBase.h

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#ifndef CSCIndexerBase_H
#define CSCIndexerBase_H

#include <DataFormats/MuonDetId/interface/CSCDetId.h>
#include <vector>
#include <utility>  // for pair
#include <boost/tuple/tuple.hpp>

class CSCIndexerBase
{
public:

  typedef uint16_t IndexType;
  typedef uint32_t LongIndexType;
  typedef boost::tuple<CSCDetId,  // id
                       IndexType, // HV segment
                       IndexType  // chip
                      > GasGainIndexType;

  CSCIndexerBase();
  virtual ~CSCIndexerBase();

  virtual std::string name() const { return "CSCIndexerBase"; }

  IndexType maxChamberIndex() const          { return 540; }
  IndexType maxLayerIndex() const            { return 3240; }
  virtual LongIndexType maxStripChannelIndex() const = 0;
  virtual IndexType maxChipIndex() const = 0;
  virtual IndexType maxGasGainIndex() const = 0;




  IndexType ringsInStation( IndexType is ) const
  {
    const IndexType nrins[5] = {0, 3, 2, 2, 2}; // physical rings per station
    return nrins[is];
  }

  virtual IndexType onlineRingsInStation( IndexType is ) const = 0;

  IndexType offlineRingsInStation( IndexType is ) const
  {
    const IndexType nrings[5] = { 0, 4, 2, 2, 2 }; // offline rings per station
    return nrings[is];
  }

  IndexType chambersInRingOfStation(IndexType is, IndexType ir) const
  {
    const IndexType nCinR[16] = { 36,36,36,36,  18,36,0,0,  18,36,0,0,  18,36,0,0 }; // chambers in ring
    return nCinR[(is - 1)*4 + ir - 1];
  }

  virtual IndexType stripChannelsPerOfflineLayer( IndexType is, IndexType ir ) const = 0;

  virtual IndexType stripChannelsPerOnlineLayer( IndexType is, IndexType ir ) const = 0;

  virtual IndexType chipsPerOnlineLayer( IndexType is, IndexType ir ) const = 0;

  IndexType sectorsPerOnlineLayer( IndexType is, IndexType ir ) const
  {
    return chipsPerOnlineLayer(is, ir) * hvSegmentsPerLayer(is, ir);
  }





  IndexType startChamberIndexInEndcap(IndexType ie, IndexType is, IndexType ir) const
  {
    const IndexType nschin[32] =
      { 1,37,73,1,        109,127,0,0,  163,181,0,0,  217,469,0,0,
        235,271,307,235,  343,361,0,0,  397,415,0,0,  451,505,0,0 };
    return nschin[(ie - 1)*16 + (is - 1)*4 + ir - 1];
  }

  IndexType chamberIndex(IndexType ie, IndexType is, IndexType ir, IndexType ic) const
  {
    return startChamberIndexInEndcap(ie, is, ir) + ic - 1; // -1 so start index _is_ ic=1
  }

  IndexType chamberIndex( const CSCDetId& id ) const
  {
    return chamberIndex( id.endcap(), id.station(), id.ring(), id.chamber() );
  }




  IndexType layerIndex(IndexType ie, IndexType is, IndexType ir, IndexType ic, IndexType il) const
  {
    const IndexType layersInChamber = 6;
    return (chamberIndex(ie, is, ir, ic) - 1 ) * layersInChamber + il;
  }

  IndexType layerIndex(const CSCDetId& id) const
  {
    return layerIndex(id.endcap(), id.station(), id.ring(), id.chamber(), id.layer());
  }




  virtual IndexType stripChannelsPerLayer( IndexType is, IndexType ir ) const = 0;

  virtual LongIndexType stripChannelStart( IndexType ie, IndexType is, IndexType ir ) const = 0;

  LongIndexType stripChannelIndex( IndexType ie, IndexType is, IndexType ir, IndexType ic, IndexType il, IndexType istrip ) const
  {
    return stripChannelStart(ie, is, ir)
           + ( (ic - 1)*6 + il - 1 ) * stripChannelsPerLayer(is, ir)
           + (istrip - 1);
  }

  LongIndexType stripChannelIndex( const CSCDetId& id, IndexType istrip ) const
  {
    return stripChannelIndex(id.endcap(), id.station(), id.ring(), id.chamber(), id.layer(), istrip );
  }




  virtual IndexType chipsPerLayer( IndexType is, IndexType ir ) const = 0;

  virtual IndexType chipStart( IndexType ie, IndexType is, IndexType ir ) const = 0;

  IndexType chipIndex( IndexType ie, IndexType is, IndexType ir, IndexType ic, IndexType il, IndexType ichip ) const
  {
    return chipStart(ie, is, ir)
           + ( (ic - 1)*6 + il - 1 ) * chipsPerLayer(is, ir)
           + (ichip - 1);
  }

  IndexType chipIndex( const CSCDetId& id, IndexType ichip ) const
  {
    return chipIndex(id.endcap(), id.station(), id.ring(), id.chamber(), id.layer(), ichip );
  }

  IndexType chipIndex( IndexType istrip ) const
  {
    return (istrip - 1)/16 + 1;
  }




  IndexType hvSegmentsPerLayer( IndexType is, IndexType ir ) const
  {
    const IndexType nSinL[16] = { 1,3,3,1, 3,5,0,0, 3,5,0,0, 3,5,0,0 };
    return nSinL[(is - 1) * 4 + ir - 1];
  }

  IndexType hvSegmentIndex(IndexType is, IndexType ir, IndexType iwire ) const;

  IndexType sectorsPerLayer( IndexType is, IndexType ir ) const
  {
    return chipsPerLayer(is, ir) * hvSegmentsPerLayer(is, ir);
  }

  virtual IndexType sectorStart( IndexType ie, IndexType is, IndexType ir ) const = 0;

  IndexType gasGainIndex( IndexType ie, IndexType is, IndexType ir, IndexType ic, IndexType il,
                          IndexType ihvsegment, IndexType ichip ) const
  {
    return sectorStart(ie,is,ir)
           + ( (ic-1)*6 + il - 1 ) * sectorsPerLayer(is,ir)
           + (ihvsegment - 1) * chipsPerLayer(is,ir)
           + (ichip - 1);
  }

  IndexType gasGainIndex( const CSCDetId& id, IndexType istrip, IndexType iwire ) const
  {
    return gasGainIndex( id.endcap(), id.station(), id.ring(), id.chamber(), id.layer(),
                         hvSegmentIndex( id.station(), id.ring(), iwire ),
                         chipIndex(istrip) );
  }

  IndexType gasGainIndex( IndexType ihvsegment, IndexType ichip, const CSCDetId& id ) const
  {
    return gasGainIndex(id.endcap(), id.station(), id.ring(), id.chamber(), id.layer(), ihvsegment, ichip);
  }




  CSCDetId detIdFromChamberIndex( IndexType ici ) const;

  CSCDetId detIdFromLayerIndex( IndexType ili ) const;

  virtual std::pair<CSCDetId, IndexType> detIdFromStripChannelIndex( LongIndexType ichi ) const = 0;

  virtual std::pair<CSCDetId, IndexType> detIdFromChipIndex( IndexType ichi ) const = 0;

  virtual GasGainIndexType detIdFromGasGainIndex( IndexType igg ) const = 0;



  virtual int dbIndex(const CSCDetId & id, int & channel) const = 0;


  IndexType chamberLabelFromChamberIndex( IndexType ) const;

protected:

  CSCDetId detIdFromChamberLabel( IndexType ie, IndexType icl ) const;

  std::vector<IndexType> chamberLabel_;
};

#endif