# -*- encoding: utf-8 -*-
###############################################################################
#
#    Odoo, Open Source Management Solution
#    This module copyright (C) 2010 - 2014 Savoir-faire Linux
#    (<http://www.savoirfairelinux.com>).
#    Copyright (C) 2015 Akretion (http://www.akretion.com)
#    @author Alexis de Lattre <alexis.delattre@akretion.com>
#
#    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 import models, fields, api, _
from openerp.exceptions import ValidationError


class AccountInvoice(models.Model):
    _inherit = "account.invoice"

    supplier_invoice_number = fields.Char(copy=False)

    @api.one
    @api.constrains('supplier_invoice_number')
    def _check_unique_supplier_invoice_number_insensitive(self):
        if (
                self.supplier_invoice_number and
                self.type in ('in_invoice', 'in_refund')):
            same_supplier_inv_num = self.search([
                ('commercial_partner_id', '=', self.commercial_partner_id.id),
                ('type', 'in', ('in_invoice', 'in_refund')),
                ('supplier_invoice_number',
                 '=ilike',
                 self.supplier_invoice_number),
                ('id', '!=', self.id),
                ])
            if same_supplier_inv_num:
                raise ValidationError(
                    _("The invoice/refund with supplier invoice number '%s' "
                      "already exists in Odoo under the number '%s' "
                      "for supplier '%s'.") % (
                        same_supplier_inv_num[0].supplier_invoice_number,
                        same_supplier_inv_num[0].number or '-',
                        same_supplier_inv_num[0].partner_id.display_name))