#  This software and supporting documentation are distributed by
#      Institut Federatif de Recherche 49
#      CEA/NeuroSpin, Batiment 145,
#      91191 Gif-sur-Yvette cedex
#      France
#
# This software is governed by the CeCILL license version 2 under
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# 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". 
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from brainvisa.processes import *
import os, re
import sys

try:
  from soma import aims
except:
  pass

def validation():
  try:
    from soma import aims
  except:
    raise ValisationError( 'no soma.aims module' )


name = 'Global graph property'
userLevel = 2

signature = Signature(
    'graph', ReadDiskItem( 'Graph', 'Graph',
                          requiredAttributes = { 'graph_version' : '3.1' } ),
    'property', String(),
    'output_prefix', String()
)


def execution( self, context ):

    subject = self.graph.get('subject')
    side = self.graph.get('side')

    self.output=  self.output_prefix + self.property + '_' + subject + '_' + side + '.dat'
    context.write('Output file :' , self.output)

    reader = aims.Reader()
    ingraph = reader.read( self.graph.fullPath() )
    val = ingraph[self.property]

    if self.output is not None :
        f = open( self.output, 'w' )
        f.write( 'subject\tside' +'\t' + self.property + '\n' )
        f.write( subject + '\t' + side + '\t' + str(val) + '\n' )
        f.close()