# -*- coding: utf-8 -*-
# This software and supporting documentation are distributed by
#     bioPICSEL
#     CEA/DSV/I²BM/MIRCen/LMN, Batiment 61,
#     18, route du Panorama
#     92265 Fontenay-aux-Roses
#     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.

# Ligne obligatoire
from brainvisa.processes import *
import os, math, copy, os.path

# Pour les formats de fichier Aims
import shfjGlobals

# Import brainrat libraries
import brainrat.uicheck as uicheck

name = 'AxialSliceReplacement'
userLevel = 0

signature = Signature(
    'Input_3dImage',  ReadDiskItem( '3D Volume', 'Biology 3D volume formats' ),
    'Replaced_Slice_Number', Integer(),
    'Duplication_Strategy',  Choice(  'Before', 'After' ),
    'Output_3dImage', WriteDiskItem( '3D Volume', 'Biology 3D volume formats' ),
  )

def initialization( self ):

  # Sets optional parameters
  self.setOptional('Output_3dImage')

def execution( self, context ):
  try :
    # Get input file infos
    aimsFileInfo = shfjGlobals.aimsVolumeAttributes( self.Input_3dImage )
    dimension = aimsFileInfo[ 'volume_dimension' ]
    outputImage = self.Output_3dImage
    
    # Check parameters
    if not uicheck.objectattr( context, self, 'Replaced_Slice_Number', [ 0, dimension[ 2 ] ], [ operator.ge, operator.lt ] ) :
      return

    if self.Duplication_Strategy == 'Before' and self.Replaced_Slice_Number == 0:
      context.error( htmlEscape( _t_( 'Impossible to replace the first slice [ \'Replaced_Slice_Number\' = %(slicenumber)s ] with the one before.' )
                                      % { 'slicenumber' : self.Replaced_Slice_Number } ) )
      return

    if self.Duplication_Strategy == 'After' and self.Replaced_Slice_Number == dimension[2] - 1 :
      context.error( htmlEscape( _t_( 'Impossible to replace the last slice [ \'Replaced_Slice_Number\' = %(slicenumber)s ] with the one after.' )
                                      % { 'slicenumber' : self.Replaced_Slice_Number } ) )
      return

    if outputImage is None :
      if context.ask( _t_( uicheck.messages[ 'overwritemessage' ]  ) %
                          { 'inputfield' : 'Input_3dImage',
                            'outputfield' : 'Output_3dImage',
                            'file' : self.Input_3dImage }, 'OK', 'Cancel' ) == 0 :
        outputImage = self.Input_3dImage
      else :
        return

    # Start replacement
    part1 = context.temporary('GIS image')
    part2 = context.temporary('GIS image')
    section = context.temporary('GIS image')

    replacementmessage = 'Replacing slice %(slice)s with a copy of slice %(replacementslice)s'
     
    # Extract blocks    
    if self.Duplication_Strategy == 'Before':
       context.write( _t_( replacementmessage ) %
                            { 'slice' : self.Replaced_Slice_Number,
                              'replacementslice' : self.Replaced_Slice_Number - 1 }, ' ...' )
       context.system( 'AimsSubVolume',
                       '-i', self.Input_3dImage,
                       '-z', self.Replaced_Slice_Number - 1,
                       '-Z', self.Replaced_Slice_Number - 1,
                       '-o', section.fullPath() )
    elif self.Duplication_Strategy == 'After':
       context.write( _t_( replacementmessage ) %
                            { 'slice' : self.Replaced_Slice_Number,
                              'replacementslice' : self.Replaced_Slice_Number + 1 }, ' ...' )
       context.system( 'AimsSubVolume',
                       '-i', self.Input_3dImage,
                       '-z', self.Replaced_Slice_Number + 1,
                       '-Z', self.Replaced_Slice_Number + 1,
                       '-o', section.fullPath() )        
        
    if self.Replaced_Slice_Number != 0:
        context.system('AimsSubVolume',
                       '-i', self.Input_3dImage,
                       '-Z', self.Replaced_Slice_Number - 1,
                       '-o', part1.fullPath() )
 
        if self.Replaced_Slice_Number != dimension[2] - 1:
            context.system('AimsSubVolume',
                           '-i', self.Input_3dImage,
                           '-z', self.Replaced_Slice_Number + 1,
                           '-o', part2.fullPath() )

            context.system( 'AimsZCat',
                            '-i', part1.fullPath(),
                            '-i', section.fullPath(),
                            '-i', part2.fullPath(),
                            '-o', outputImage )
        else:
            context.system( 'AimsZCat',
                            '-i', part1.fullPath(),
                            '-i', section.fullPath(),
                            '-o', outputImage )
    else:
        if self.Replaced_Slice_Number != dimension[2] - 1:
            context.system('AimsSubVolume',
                           '-i', self.Input_3dImage,
                           '-z', self.Replaced_Slice_Number + 1,
                           '-o', part2.fullPath() )

            context.system( 'AimsZCat',
                            '-i', section.fullPath(),
                            '-i', part2.fullPath(),
                            '-o', outputImage )            

  except Exception, error :
    context.error( _t_( uicheck.messages[ 'processingerrormessage' ] ) )