/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/EventFilter/SiPixelRawToDigi/interface/PixelUnpackingRegions.h

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#ifndef PixelUnpackingRegions_H
#define PixelUnpackingRegions_H

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESWatcher.h"
#include "DataFormats/Math/interface/Point3D.h"
#include "DataFormats/Math/interface/Vector3D.h"

#include "CondFormats/DataRecord/interface/SiPixelFedCablingMapRcd.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCablingMap.h"

#include <cmath>
#include <vector>
#include <set>
#include <boost/scoped_ptr.hpp>


class PixelUnpackingRegions
{
public:

  struct Region
  {
    Region(const math::XYZVector &dir, float dphi = 0.5f, float maxz = 24.f):
      v(dir), dPhi(dphi), maxZ(maxz)
    {
      cosphi = v.x()/v.rho();
      sinphi = v.y()/v.rho();
      atantheta = v.z()/v.rho();
    }
    math::XYZVector v;
    float dPhi, maxZ;
    float cosphi, sinphi, atantheta;
  };


  PixelUnpackingRegions(const edm::ParameterSet&);

  ~PixelUnpackingRegions() {}

  void run(const edm::Event& e, const edm::EventSetup& es);

  bool mayUnpackFED(unsigned int fed_n) const;

  bool mayUnpackModule(unsigned int id) const;
  
  const std::set<unsigned int> * modulesToUnpack() const {return &modules_;}

  unsigned int nFEDs() const { return feds_.size(); }
  unsigned int nBarrelFEDs() const;
  unsigned int nForwardFEDs() const;
  unsigned int nModules() const { return modules_.size(); }
  unsigned int nBarrelModules() const;
  unsigned int nForwardModules() const;
  unsigned int nRegions() const { return nreg_; }

  struct Module
  {
    float phi;
    float x, y, z;
    unsigned int id;
    unsigned int fed;

    Module() {}
    Module(float ph) : phi(ph), x(0.f), y(0.f), z(0.f), id(0), fed(0) {}

    bool operator < (const Module& m) const
    {
      if(phi < m.phi) return true;
      if(phi == m.phi && id < m.id) return true;
      return false;
    }
  };

private:

  // input parameters
  std::vector<edm::InputTag> inputs_;
  std::vector<double> dPhi_;
  std::vector<double> maxZ_;
  edm::InputTag beamSpotTag_;

  std::set<unsigned int> feds_;
  std::set<unsigned int> modules_;
  unsigned int nreg_;

  void initialize(const edm::EventSetup& es);

  // add a new direction of a region of interest
  void addRegion(Region &r);

  // gather info into feds_ and modules_ from a range of a Module vector
  void gatherFromRange(Region &r, std::vector<Module>::const_iterator, std::vector<Module>::const_iterator);

  // addRegion for a local (BPIX or +-FPIX) container
  void addRegionLocal(Region &r, std::vector<Module> &container, Module lo, Module hi);

  // local containers of barrel and endcaps Modules sorted by phi
  std::vector<Module> phiBPIX_;
  std::vector<Module> phiFPIXp_;
  std::vector<Module> phiFPIXm_;

  boost::scoped_ptr<SiPixelFedCabling> cabling_;
  math::XYZPoint beamSpot_;

  edm::ESWatcher<SiPixelFedCablingMapRcd> watcherSiPixelFedCablingMap_;
};

#endif