#  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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# 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 *

name = 'Diffusion model'
userLevel = 0

signature=Signature(
  't2_diffusion', ReadDiskItem( 'T2 Diffusion MR',
                                'Aims readable volume formats' ),
  'dw_diffusion', ReadDiskItem( 'DW Diffusion MR',
                                'Aims readable volume formats' ),
  'mask', ReadDiskItem( 'Diffusion mask', 'Aims readable volume formats'  ),
  'model_type', Choice( "DTI", "QBall" ),
  'diffusion_model', WriteDiskItem( 'Diffusion Model', 'Bucket'),
)

def modelTypeChange(self, model_type):
  if self.model_type == "DTI":
    self._executionNode.DiffusionDTIModel.setSelected( True )
    self._executionNode.DiffusionQBallModel.setSelected( False )
  else:
    self._executionNode.DiffusionDTIModel.setSelected( True )
    self._executionNode.DiffusionQBallModel.setSelected( True )
  
def modelSelected(self, model):
  if model == self._executionNode.DiffusionDTIModel: # DTI process selection changed
    #the dti model is the output model if only dti process is selected
    #so when selecting dti process, links to diffusion_model parameter are added only if qball process is not selected
    if model._selected and not self._executionNode.DiffusionQBallModel._selected:
      self._executionNode.addLink('diffusion_model', 'DiffusionDTIModel.diffusion_model' )
      self._executionNode.addLink('DiffusionDTIModel.diffusion_model', 'diffusion_model' )
      self.diffusion_model=model.diffusion_model
      self.model_type="DTI"
  else: # QBall process selection changed
    if model._selected: # if qball process is selected, qball model is the output model
      self._executionNode.addLink('diffusion_model', 'DiffusionQBallModel.diffusion_model' )
      self._executionNode.addLink('DiffusionQBallModel.diffusion_model', 'diffusion_model' )
      self._executionNode.removeLink('diffusion_model', 'DiffusionDTIModel.diffusion_model' )
      self._executionNode.removeLink('DiffusionDTIModel.diffusion_model', 'diffusion_model' )
      self.diffusion_model=model.diffusion_model
      self.model_type="QBall"
    else:
      self._executionNode.removeLink('diffusion_model', 'DiffusionQBallModel.diffusion_model' )
      self._executionNode.removeLink('DiffusionQBallModel.diffusion_model', 'diffusion_model' )
      # when deselecting qball process, dti model becomes the output model if the dti process is selected
      if self._executionNode.DiffusionDTIModel._selected:
        self._executionNode.addLink('diffusion_model', 'DiffusionDTIModel.diffusion_model' )
        self._executionNode.addLink('DiffusionDTIModel.diffusion_model', 'diffusion_model' )
        self.diffusion_model=self._executionNode.DiffusionDTIModel.diffusion_model
        self.model_type="DTI"

def initialization( self ):
  self.setOptional( 'mask')
  
  # Create execution tree
  eNode = SerialExecutionNode( self.name, 
    parameterized=self )
    
  eNode.addChild( 'DiffusionDTIModel',
                   ProcessExecutionNode( 'DiffusionDTIModel', optional=True, selected=True ) )
  eNode.addChild( 'DiffusionQBallModel',
                   ProcessExecutionNode( 'DiffusionQBallModel', optional=True, selected=False ) )
  
  eNode.addLink(None, "model_type", self.modelTypeChange )
  
  # Link 'DTI' parameters
  eNode.addLink( 't2_diffusion', 'DiffusionDTIModel.t2_diffusion' )
  eNode.addLink( 'DiffusionDTIModel.t2_diffusion', 't2_diffusion' )
  eNode.addLink( 'dw_diffusion', 'DiffusionDTIModel.dw_diffusion' )
  eNode.addLink( 'DiffusionDTIModel.dw_diffusion', 'dw_diffusion' )
  eNode.addLink( 'mask', 'DiffusionDTIModel.mask' )
  eNode.addLink( 'DiffusionDTIModel.mask', 'mask' )
  # default model type is DTI so links are initialized with dti model
  eNode.addLink( 'diffusion_model', 'DiffusionDTIModel.diffusion_model' )
  eNode.addLink( 'DiffusionDTIModel.diffusion_model', 'diffusion_model' )
 
 
  # Link 'QBall' parameters
  eNode.addLink( 't2_diffusion', 'DiffusionQBallModel.t2_diffusion' )
  eNode.addLink( 'DiffusionQBallModel.t2_diffusion', 't2_diffusion' )
  eNode.addLink( 'dw_diffusion', 'DiffusionQBallModel.dw_diffusion' )
  eNode.addLink( 'DiffusionQBallModel.dw_diffusion', 'dw_diffusion' )
  eNode.addLink( 'mask', 'DiffusionQBallModel.mask' )
  eNode.addLink( 'DiffusionQBallModel.mask', 'mask' )
  #eNode.addLink( 'diffusion_model', 'DiffusionQBallModel.diffusion_model' )
  #eNode.addLink( 'DiffusionQBallModel.diffusion_model', 'diffusion_model' )
  
  eNode.DiffusionDTIModel._selectionChange.add( self.modelSelected )
  eNode.DiffusionQBallModel._selectionChange.add( self.modelSelected )
  
  self.setExecutionNode( eNode )