/*
 * This file is part of the Owl Positioning System (OwlPS).
 * OwlPS is a project of the University of Franche-Comté
 * (Université de Franche-Comté), France.
 */


#ifndef _OWLPS_POSITIONING_REFERENCEPOINT_HH_
#define _OWLPS_POSITIONING_REFERENCEPOINT_HH_

class AccessPoint ;
class CalibrationRequest ;
class Request ;
class Measurement ;

#include "point3d.hh"

#include <vector>
#include <ostream>
#include <boost/tr1/unordered_map.hpp>

/// Represents a reference point in 3-D space
class ReferencePoint: public Point3D
{
protected:
  /// List of CalibrationRequest associated with the ReferencePoint
  /** Note that \em requests is a \em pointer list: only pointers
      are stored, not values. */
  std::vector<CalibrationRequest*> requests ;

  /** @name Read accessors */
  //@{
  std::tr1::unordered_map<std::string, Measurement>
  get_all_measurements(void) const ;
  /// Returns all the measurements sent by the given mobile
  std::tr1::unordered_map<std::string, Measurement>
  get_all_measurements(const std::string &mac_transmitter) const ;
  /// Returns the calibration requests sent by the given mobile
  const std::vector<CalibrationRequest*> get_requests(
    const std::string &mac_transmitter) const ;
  //@}

public:
  ReferencePoint(const float &_x = 0,
                 const float &_y = 0,
                 const float &_z = 0): Point3D(_x, _y, _z) {}

  ReferencePoint(const Point3D &p): Point3D(p) {}

  ReferencePoint(const ReferencePoint &source):
    Point3D(source), requests(source.requests) {}

  ~ReferencePoint(void) ;

  /** @name Read accessors */
  //@{
  const std::vector<CalibrationRequest*>& get_requests(void) const ;
  double average_measurements(const std::string &mac_transmitter) const ;
  //@}

  /** @name Write accessors */
  //@{
  /// Adds a Request to the \link #requests request list\endlink
  void add_request(const CalibrationRequest *r) ;
  /// Deletes all the requests contained in #requests
  void delete_requests(void) ;
  /// Deletes the requests that are not sent by an AP
  bool delete_generated_requests(void) ;
  //@}

  /** @name Operations */
  //@{
  /// Computes the distance between the ReferencePoint and a Request
  float ss_square_distance(const Request &source) const ;
  /// Computes the Friis index for the given AccessPoint
  float friis_index_for_ap(const std::string &ap_mac) const ;
  /// Computes the Friis indexes sum for the given AccessPoint
  float friis_indexes_for_ap(
    const AccessPoint &ap, const double &const_term,
    int &nb_indexes) const ;
  //@}

  /** @name Operators */
  //@{
  ReferencePoint& operator=(const ReferencePoint &source) ;
  bool operator==(const ReferencePoint &source) const ;
  bool operator!=(const ReferencePoint &source) const ;
  //@}

  /// Displays a ReferencePoint
  friend std::ostream &operator<<(std::ostream &os, const ReferencePoint &rp) ;

  /// Hashes a ReferencePoint
  friend std::size_t hash_value(const ReferencePoint &source) ;
} ;



/* *** Read accessors *** */


inline const
std::vector<CalibrationRequest*>& ReferencePoint::get_requests() const
{
  return requests ;
}



/* *** Write accessors *** */


/**
 * @param r A pointer to the CalibrationRequest to add. If it is
 * NULL, nothing will be done.
 * The memory pointed by this pointer must not be deallocated before
 * the ReferencePoint destruction (do \em not pass a pointer to a local
 * variable!).
 */
inline void ReferencePoint::add_request(const CalibrationRequest *r)
{
  if (r != NULL)
    requests.push_back(const_cast<CalibrationRequest*>(r)) ;
}



/* *** Operators *** */


inline bool ReferencePoint::operator!=(const ReferencePoint &source) const
{
  return !(*this == source) ;
}



struct reference_point_equal_to:
  public std::binary_function<ReferencePoint, ReferencePoint, bool>
{
  bool operator()(const ReferencePoint &source1,
                  const ReferencePoint &source2) const
  {
    return
      static_cast<Point3D>(source1) == static_cast<Point3D>(source2) ;
  }
} ;



#endif // _OWLPS_POSITIONING_REFERENCEPOINT_HH_