/*
 * 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.
 */


#include "building.hh"
#include "area.hh"
#include "waypoint.hh"
#include "stock.hh"


using namespace std ;
using std::tr1::unordered_set ;
using std::tr1::unordered_map ;



/* *** Constructors *** */


/**
 * Note: deletes (unallocates) all elements in #areas; deletes elements
 * in #waypoints that belong only to this Building (waypoints that link
 * several buildings are preserved).
 */
Building::~Building()
{
  // Empty Area list
  for (unordered_map<string, Area*>::const_iterator i = areas.begin() ;
       i != areas.end() ; ++i)
    delete i->second ;
  areas.clear() ;

  // Empty Waypoint list
  for (unordered_set<Waypoint*>::const_iterator i = waypoints.begin() ;
       i != waypoints.end() ; ++i)
    Stock::waypoint_remove_building(**i, this) ;
  waypoints.clear() ;
}



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


/**
 * @param area A pointer to the Area to add. If it is NULL, nothing
 * will be added. If the Area it points to already exist in #areas, it is
 * deleted and nullified, unless it is the same pointer (see the code to
 * understand!); hmm, maybe we should handle that with exceptions…
 */
void Building::add_area(Area *&area)
{
  if (area == NULL)
    return ;

  string area_name = area->get_name() ;

  // Check if the area already exist in areas
  unordered_map<string, Area*>::const_iterator i =
    areas.find(area_name) ;
  if (i != areas.end())
    {
      // Do not delete if area points to the already stored Area
      if (i->second != area)
        {
          delete area ;
          area = NULL ;
        }
      return ;
    }

  areas[area_name] = const_cast<Area*>(area) ;
}



/* *** Operators *** */


Building& Building::operator=(const Building &source)
{
  if (this == &source)
    return *this ;

  name = source.name ;
  areas = source.areas ;
  waypoints = source.waypoints ;

  return *this;
}


bool Building::operator==(const Building &source) const
{
  if (this == &source)
    return true ;

  return
    name == source.name &&
    areas == source.areas &&
    waypoints == source.waypoints ;
}



ostream& operator<<(ostream &os, const Building &b)
{
  os
      << b.name << " ("
      << b.areas.size() << " areas, "
      << b.waypoints.size() << " waypoints)" ;

  return os ;
}