#  This software and supporting documentation were developed by
#  NeuroSpin and IFR 49
#
# This software is governed by the CeCILL license version 2 under
# French law and abiding by the rules of distribution of free software.
# You can  use, modify and/or redistribute the software under the
# terms of the CeCILL license version 2 as circulated by CEA, CNRS
# and INRIA at the following URL "http://www.cecill.info".
#
# As a counterpart to the access to the source code and  rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty  and the software's author,  the holder of the
# economic rights,  and the successive licensors  have only  limited
# liability.
#
# In this respect, the user's attention is drawn to the risks associated
# with loading,  using,  modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean  that it is complicated to manipulate,  and  that  also
# therefore means  that it is reserved for developers  and  experienced
# professionals having in-depth computer knowledge. Users are therefore
# encouraged to load and test the software's suitability as regards their
# requirements in conditions enabling the security of their systems and/or
# data to be ensured and,  more generally, to use and operate it in the
# same conditions as regards security.
#
# The fact that you are presently reading this means that you have had
# knowledge of the CeCILL license version 2 and that you accept its terms.

'''
@author: Yann Cointepas
@organization: U{NeuroSpin<http://www.neurospin.org>} and U{IFR 49<http://www.ifr49.org>}
@license: U{CeCILL version 2<http://www.cecill.info/licences/Licence_CeCILL_V2-en.html>}
'''
__docformat__ = "epytext en"

import os
from connectomist.configuration import  shareDirectory
from soma.minf.api import readMinf

_availableOrientationsSets = None
_loadedOrientationsSets = {}

def availableOrientationSets():
  global _availableOrientationsSets
  if _availableOrientationsSets is None:
    _availableOrientationsSets = [ i[:-5] for i in \
      os.listdir( os.path.join( shareDirectory, 'orientation_sets' ) ) ]
    _availableOrientationsSets.sort()
  return _availableOrientationsSets
  
def getOrientationSet( name ):
  global _loadedOrientationsSets
  result = _loadedOrientationsSets.get( name )
  if result is None:
    minf = os.path.join( shareDirectory, 'orientation_sets', name + '.minf' )
    result =  readMinf( minf )
    _loadedOrientationsSets[ name ] = result
  return result