# -*- encoding: utf-8 -*-
##############################################################################
#
#    Account partner required module for OpenERP
#    Copyright (C) 2014 Acsone (http://acsone.eu).
#    @author Stéphane Bidoul <stephane.bidoul@acsone.eu>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

from openerp.osv import orm, fields
from openerp.tools.translate import _


class account_account_type(orm.Model):
    _inherit = "account.account.type"

    _columns = {
        'partner_policy': fields.selection([
            ('optional', 'Optional'),
            ('always', 'Always'),
            ('never', 'Never')
            ], 'Policy for partner field',
            help="Set the policy for the partner field : if you select "
                 "'Optional', the accountant is free to put a partner "
                 "on an account move line with this type of account ; "
                 "if you select 'Always', the accountant will get an error "
                 "message if there is no partner ; if you select 'Never', "
                 "the accountant will get an error message if a partner "
                 "is present."),
    }

    _defaults = {
        'partner_policy': 'optional',
    }


class account_move_line(orm.Model):
    _inherit = "account.move.line"

    def check_partner_required(self, cr, uid, ids, vals, context=None):
        if 'account_id' in vals or 'partner_id' in vals or \
                'debit' in vals or 'credit' in vals:
            if isinstance(ids, (int, long)):
                ids = [ids]
            for move_line in self.browse(cr, uid, ids, context):
                if move_line.debit == 0 and move_line.credit == 0:
                    continue
                policy = move_line.account_id.user_type.partner_policy
                if policy == 'always' and not move_line.partner_id:
                    raise orm.except_orm(_('Error :'),
                                         _("Partner policy is set to 'Always' "
                                           "with account %s '%s' but the "
                                           "partner is missing in the account "
                                           "move line with label '%s'." %
                                           (move_line.account_id.code,
                                            move_line.account_id.name,
                                            move_line.name)))
                elif policy == 'never' and move_line.partner_id:
                    raise orm.except_orm(_('Error :'),
                                         _("Partner policy is set to 'Never' "
                                           "with account %s '%s' but the "
                                           "account move line with label '%s' "
                                           "has a partner '%s'." %
                                           (move_line.account_id.code,
                                            move_line.account_id.name,
                                            move_line.name,
                                            move_line.partner_id.name)))

    def create(self, cr, uid, vals, context=None, check=True):
        line_id = super(account_move_line, self).create(cr, uid, vals,
                                                        context=context,
                                                        check=check)
        self.check_partner_required(cr, uid, line_id, vals, context=context)
        return line_id

    def write(self, cr, uid, ids, vals, context=None, check=True,
              update_check=True):
        res = super(account_move_line, self).write(cr, uid, ids, vals,
                                                   context=context,
                                                   check=check,
                                                   update_check=update_check)
        self.check_partner_required(cr, uid, ids, vals, context=context)
        return res