# -*- coding: utf-8 -*-
##############################################################################
#
# Copyright (c) 2010 Nexedi SARL and Contributors. All Rights Reserved.
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsibility of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# guarantees and support are strongly adviced to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
##############################################################################
"""
XXX This file is experimental for new simulation implementation, and
will replace PaymentRule.
"""

import zope.interface
from AccessControl import ClassSecurityInfo
from Products.ERP5Type import Permissions, PropertySheet, interfaces
from Products.ERP5.Document.Predicate import Predicate
from Products.ERP5.mixin.rule import RuleMixin, MovementGeneratorMixin
from Products.ERP5.mixin.movement_collection_updater import \
     MovementCollectionUpdaterMixin

class PaymentSimulationRule(RuleMixin, MovementCollectionUpdaterMixin, Predicate):
  """
  Payment Rule generates payment simulation movement from invoice
  transaction simulation movements.
  """
  # CMF Type Definition
  meta_type = 'ERP5 Payment Simulation Rule'
  portal_type = 'Payment Simulation Rule'

  # Declarative security
  security = ClassSecurityInfo()
  security.declareObjectProtected(Permissions.AccessContentsInformation)

  # Declarative interfaces
  zope.interface.implements(interfaces.IRule,
                            interfaces.IDivergenceController,
                            interfaces.IMovementCollectionUpdater,)

  # Default Properties
  property_sheets = (
    PropertySheet.Base,
    PropertySheet.XMLObject,
    PropertySheet.CategoryCore,
    PropertySheet.DublinCore,
    PropertySheet.Task,
    PropertySheet.Predicate,
    PropertySheet.Reference,
    PropertySheet.Version,
    PropertySheet.Rule
    )

  def _getMovementGenerator(self, context):
    """
    Return the movement generator to use in the expand process
    """
    return PaymentRuleMovementGenerator(applied_rule=context, rule=self)

  def _getMovementGeneratorContext(self, context):
    """
    Return the movement generator context to use for expand
    """
    return context

  def _getMovementGeneratorMovementList(self, context):
    """
    Return the movement lists to provide to the movement generator
    """
    return []

  def _isProfitAndLossMovement(self, movement):
    # For a kind of trade rule, a profit and loss movement lacks source
    # or destination.
    return (movement.getSource() is None or movement.getDestination() is None)

class PaymentRuleMovementGenerator(MovementGeneratorMixin):
  def getGeneratedMovementList(self, movement_list=None, rounding=False):
    """
    Input movement list comes from parent.

    XXX This implementation using Business Path, not Payment Condition.
    """
    ret = []
    rule = self._rule
    for input_movement, business_path in self \
            ._getInputMovementAndPathTupleList(movement_list=movement_list, rounding=rounding):
      # Payment Rule does not work with Business Path
      if business_path is None:
        continue
      # Since we need to consider business_path only for bank movement,
      # not for payable movement, we pass None as business_path here.
      kw = self._getPropertyAndCategoryList(input_movement, None, rule)
      kw.update({'order':None, 'delivery':None})
      quantity = kw.pop('quantity', 0)
      efficiency = business_path.getEfficiency()
      if efficiency:
        quantity *= efficiency
      start_date = business_path.getExpectedStartDate(input_movement)
      if start_date is not None:
        kw.update({'start_date':start_date})
      stop_date = business_path.getExpectedStopDate(input_movement)
      if stop_date is not None:
        kw.update({'stop_date':stop_date})
      # one for payable
      simulation_movement = self._applied_rule.newContent(
        portal_type=RuleMixin.movement_type,
        temp_object=True,
        quantity=-quantity,
        **kw)
      ret.append(simulation_movement)
      # one for bank
      kw.update({'source':business_path.getSource(),
                 'destination':business_path.getDestination(),})
      simulation_movement = self._applied_rule.newContent(
        portal_type=RuleMixin.movement_type,
        temp_object=True,
        quantity=quantity,
        **kw)
      ret.append(simulation_movement)
    return ret

  def _getInputMovementList(self, movement_list=None, rounding=None):
    return [self._applied_rule.getParentValue(),]
