  # -*- coding: utf-8 -*-
##############################################################################
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# Copyright (c) 2008 Nexedi SA and Contributors. All Rights Reserved.
#                           Łukasz Nowak <luke@nexedi.com>
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# WARNING: This program as such is intended to be used by professional
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from Products.ERP5.Document.CausalityMovementGroup import CausalityMovementGroup

class FirstCausalityMovementGroup(CausalityMovementGroup):
  """
  Returns first found causality, using delivery of parent movements
  Non modifiable version of DeliveryCausalityAssignmentMovementGroup
  """
  meta_type = 'ERP5 First Causality Movement Group'
  portal_type = 'First Causality Movement Group'

  def test(self, movement, property_dict, **kw):
    """Compare explanation to now if it is possible to update delivery"""
    explanation = property_dict.get('_explanation','')
    if movement.getRelativeUrl() == explanation:
      return True, {}
    else:
      return False, {}

  def _getExplanationRelativeUrl(self, movement):
    """ Get the order value for a movement """
    parent = movement.getParentValue().getParentValue()
    # Go upper into the simulation tree in order to find a delivery link
    while parent.getDeliveryValue() is None and not(parent.isRootAppliedRule()):
      parent = parent.getParentValue()
    delivery_movement = parent.getDeliveryValue()
    delivery_url = None
    if delivery_movement is not None:
      delivery = delivery_movement.getExplanationValue()
      if delivery is not None:
        delivery_url = delivery.getRelativeUrl()
    return delivery_url
