# -*- coding: utf-8 -*-
#  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
# 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: Dominique Geffroy
@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>}
'''
from PyQt4.QtGui import QWidget, QHBoxLayout, QPushButton
from PyQt4.QtCore import SIGNAL, QSize
from brainvisa.data.qtgui.neuroDataGUI import DataEditor
from brainvisa.data.qtgui.readdiskitemGUI import DiskItemEditor
from brainvisa.configuration import neuroConfig

import threading
import subprocess
import sys

#----------------------------------------------------------------------------
class LabelSelectionEditor( QWidget, DataEditor ):
    def __init__( self, parameter, parent, name ):
        DataEditor.__init__( self )
        QWidget.__init__( self, parent )
        self.setObjectName(name)
        layout=QHBoxLayout()
        self.setLayout(layout)
        layout.setMargin(0)
        layout.setSpacing(4)
        self.value = parameter
        self._disk = DiskItemEditor( self.value.fileDI, self, 'diskitem', 1 )
        layout.addWidget(self._disk)
        self._edit = QPushButton( '...', self )
        self._edit.setObjectName('edit')
        layout.addWidget(self._edit)
        self.connect( self._edit, SIGNAL( 'clicked()' ), self.run )
        self._labelsel = 0
        self.connect( self._disk, SIGNAL( 'newValidValue' ),
                      self.diskItemChanged )

    def setValue( self, value, default=0 ):
        if value is not None:
            self.value = value

    def getValue( self ):
        return self.value

    def run( self ):
        if self._labelsel == 0:
            self._labelsel = 1
            model = self.value.value.get( 'model' )
            nom = self.value.value.get( 'nomenclature' )
            fsel = self.value.file
            psel = self.value.value.get( 'selection' )
            cmd = [ 'AimsLabelSelector' ]
            if model:
                cmd += [ '-m', model ]
            if nom:
                cmd += [ '-n', nom ]
            if psel:
                cmd += [ '-p', '-' ]
            elif fsel:
                cmd += [ '-p', fsel.fullPath() ]
            sys.stdout.flush()
            if neuroConfig.platform == 'windows':
                pipe = subprocess.Popen( cmd, stdin=subprocess.PIPE,
                    stdout=subprocess.PIPE )
            else:
                pipe = subprocess.Popen( cmd, stdin=subprocess.PIPE,
                    stdout=subprocess.PIPE, close_fds=True )
            self._stdout, self._stdin = pipe.stdout, pipe.stdin
            if( psel ):
                # print 'writing selection:', psel
                self._stdin.write( psel )
                self._stdin.flush()
            self._thread = threading.Thread( target = self.read )
            self._thread.start()
 
    def read( self ):
        val = self._stdout.read()
        sys.stdout.flush()
        del self._stdout
        del self._stdin
        if val:
            self.value.value[ 'selection' ] = val
            self.newValue()
        self._labelsel = 0
        del self._thread

    def newValue( self ):
        self.emit( SIGNAL('newValidValue'), unicode(self.objectName()), self.value )
        #self.emit( PYSIGNAL('noDefault'), ( self.name(),) )

    def diskItemChanged( self, name, val):
        print 'Selector: file changed:', val
        self.value.file = val
        if val is None:
            print 'temp'
        else:
            file = val.fullPath()
            print file
            if self.value.value.get( 'selection' ):
                del self.value.value[ 'selection' ]