/*
 * This file is part of the Owl Positioning System (OwlPS) project.
 * It is subject to the copyright notice and license terms in the
 * COPYRIGHT.t2t file found in the top-level directory of this
 * distribution and at
 *   https://code.lm7.fr/mcy/owlps/src/master/COPYRIGHT.t2t
 * No part of the OwlPS Project, including this file, may be copied,
 * modified, propagated, or distributed except according to the terms
 * contained in the COPYRIGHT.t2t file; the COPYRIGHT.t2t file must be
 * distributed along with this file, either separately or by replacing
 * this notice by the COPYRIGHT.t2t file's contents.
 */


#include "direction.hh"
#include "posexcept.hh"



/* *** Constructors *** */


Direction::Direction(const uint_fast8_t source):
  direction(source)
{
  assert_valid() ;
}



/* *** Operations *** */


inline void Direction::assert_valid() const
{
  if (! (is_valid() || direction == 0))
    throw bad_direction(direction) ;
}


inline bool Direction::is_valid() const
{
  return direction > 0 && direction <= 4 ;
}



/* *** Operators *** */


Direction& Direction::operator=(const Direction &source)
{
  direction = source.direction ;
  return *this ;
}


Direction& Direction::operator=(const uint_fast8_t source)
{
  direction = source ;
  assert_valid() ;
  return *this ;
}


Direction::operator bool() const
{
  return is_valid() ;
}


Direction::operator std::string() const
{
  switch (direction)
    {
    case north:
      return "north" ;
    case east:
      return "east" ;
    case south:
      return "south" ;
    case west:
      return "west" ;
    }
  return "Bad direction!" ;
}