#ifndef _CALOR_ALG_HH_
#define _CALOR_ALG_HH_
/******************************************************************************
 * Calor Algorithm classes header file                                        *
 *                                                                            *
 * Author: Bob Wagner, Argonne CDF Group                                      *
 *         Phone 630-252-6321 (Argonne)  630-840-8436 (Fermilab)              *
 *                                                                            *
 * Description:  Algorithms for manipulation of objects provided by           *
 *               calorimetry                                                  *
 *                                                                            *
 * Revision History:                                                          *
 *    18-Jan-2001   Bob Wagner   Initial creation with TowerDataFromTowerKey  *
 *    23-Mar-2001   Bob Wagner   Add TowerKeyFromTrack and                    *
 *                               ExtrapolateToShowerMax                       *
 *    16-Oct-2004   Bob Wagner   Add ExtrapolateToPreShower                   *
 *                                                                            *
 *****************************************************************************/
//---------------
// C++ Headers --
//---------------
#include <functional>
#include <utility>

//-------------------------------
// Collaborating Class Headers --
//-------------------------------
#include "CalorGeometry/TowerKey.hh"
#include "CalorObjects/CalData.hh"
#include "CalorObjects/PhysicsTowerData.hh"

//----------------------------------
// Forward Declaration of Classes --
//----------------------------------
class TowerGeometry;
class CdfTrack;
class SimpleExtrapolatedTrack;

namespace calor_alg {
  class CalTowerFromTowerKey;
  class PhysicsTowerFromTowerKey;
  class TowerKeyFromTrack;
  class ExtrapolateToShowerMax;
  class ExtrapolateToPreShower;
}


//*****************************************************************************
// Class Declarations
//*****************************************************************************
/*=====================================*\
 * PhysicsTowerFromTowerKey algorithm  *
\*=====================================*/
class calor_alg::PhysicsTowerFromTowerKey {
public:
  PhysicsTowerFromTowerKey( void );
  PhysicsTowerFromTowerKey(const PhysicsTowerFromTowerKey& rhs);
  ~PhysicsTowerFromTowerKey() { }

  // Provides the PhysicsTower corresponding to the passed TowerKey.
  const PhysicsTower*   operator ()( const TowerKey& ) const;

private:
  PhysicsTowerData_ch  _towers;
};


/*=====================================*\
 * CalTowerFromTowerKey algorithm      *
\*=====================================*/
class calor_alg::CalTowerFromTowerKey {
public:
  CalTowerFromTowerKey( void );
  CalTowerFromTowerKey(const CalTowerFromTowerKey& rhs);
  ~CalTowerFromTowerKey() { }

  // Provides the CalTower corresponding to the passed TowerKey.
  const CalTower*   operator ()( const TowerKey& ) const;

private:
  CalData_ch    _towers;
};


/*=====================================*\
 * TowerKeyFromTrack algorithm         *
\*=====================================*/
class calor_alg::TowerKeyFromTrack : public std::unary_function<CdfTrack,TowerKey>
{

public:
  TowerKeyFromTrack( void );
  TowerKeyFromTrack(const TowerKeyFromTrack& rhs);
  ~TowerKeyFromTrack() { }

  // Provides the TowerKey of tower containing track extrapolated to shower max
  // If operator call with SimpleExtrapolatedTrack argument, argument is
  // updated with extrapolated track values at shower max of calorimeter hit
  TowerKey          operator()(const CdfTrack&) const;
  TowerKey          operator()(const CdfTrack*) const;
  static TowerKey   getTower(const CdfTrack&);
  static TowerKey   getTower(const CdfTrack*);
  static TowerKey   getTower(const CdfTrack&, SimpleExtrapolatedTrack&);
  static TowerKey   getTower(const CdfTrack*, SimpleExtrapolatedTrack&);

private:
  const TowerGeometry*             _towerGeometry;
};


/*=====================================*\
 * ExtrapolateToShowerMax algorithm    *
\*=====================================*/
class calor_alg::ExtrapolateToShowerMax :
  public std::binary_function<CdfTrack,SimpleExtrapolatedTrack,bool> {

public:
  ExtrapolateToShowerMax( void );
  ExtrapolateToShowerMax(const ExtrapolateToShowerMax& rhs);
  ~ExtrapolateToShowerMax() { }
  bool  operator()(const CdfTrack&, SimpleExtrapolatedTrack&) const;
  bool  operator()(const CdfTrack*, SimpleExtrapolatedTrack&) const;

  static bool
  extrapolate(const CdfTrack&, SimpleExtrapolatedTrack&);

  static bool
  extrapolate(const CdfTrack*, SimpleExtrapolatedTrack&);

private:
  const TowerGeometry*             _towerGeometry;
};



/*=====================================*\
 * ExtrapolateToPreShower algorithm    *
\*=====================================*/
class calor_alg::ExtrapolateToPreShower :
  public std::binary_function<CdfTrack,SimpleExtrapolatedTrack,bool> {

public:
  ExtrapolateToPreShower( void );
  ExtrapolateToPreShower(const ExtrapolateToPreShower& rhs);
  ~ExtrapolateToPreShower() { }
  bool  operator()(const CdfTrack&, SimpleExtrapolatedTrack&) const;
  bool  operator()(const CdfTrack*, SimpleExtrapolatedTrack&) const;

  static bool
  extrapolate(const CdfTrack&, SimpleExtrapolatedTrack&);

  static bool
  extrapolate(const CdfTrack*, SimpleExtrapolatedTrack&);

private:
  const TowerGeometry*             _towerGeometry;
};


/*===========================================================================*\
 * Inline functions                                                          *
\*===========================================================================*/
#include  "Calor/calor_alg.icc"

/******************************************************************************
 *     ALL DONE                                                               *
 *****************************************************************************/
#endif // _CALOR_ALG_HH_