# -*- coding: utf-8 -*-
################################################################################
#
#    Cybrosys Technologies Pvt. Ltd.
#
#    Copyright (C) 2023-TODAY Cybrosys Technologies(<https://www.cybrosys.com>).
#    Author: Sruthi Renjith (odoo@cybrosys.com)
#
#    You can modify it under the terms of the GNU AFFERO
#    GENERAL PUBLIC LICENSE (AGPL v3), Version 3.
#
#    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 (AGPL v3) for more details.
#
#    You should have received a copy of the GNU AFFERO GENERAL PUBLIC LICENSE
#    (AGPL v3) along with this program.
#    If not, see <http://www.gnu.org/licenses/>.
#
################################################################################
from odoo import fields, models


class ProductTemplate(models.Model):
    """ Class to inherit product.template to add costing method """
    _inherit = 'product.template'

    property_cost_method = fields.Selection([
        ('standard', 'Standard Price'),
        ('last', 'Last Purchase Price'),
        ('fifo', 'First In First Out (FIFO)'),
        ('average', 'Average Cost (AVCO)')], string='Costing Method',
        company_dependent=True, copy=True,
        help="""Standard Price: The products are valued at their standard cost defined on the product.
        Average Cost (AVCO): The products are valued at weighted average cost.
        First In First Out (FIFO): The products are valued supposing those that enter the company first will also leave it first.
        Last Purchase Price: The products are valued same as 'Standard Price' Method, But standard price defined on the product will be updated automatically with last purchase price.""")

    def _set_cost_method(self):
        """ When going from FIFO to AVCO or to standard, we update the standard
        price with the average value in stock """
        if (self.property_cost_method == 'fifo' and
                self.cost_method in ['average', 'standard', 'last']):
            # Cannot use the `stock_value` computed field as it's already
            # invalidated when entering this method.
            valuation = sum([variant._sum_remaining_values()[0] for variant in
                             self.product_variant_ids])
            qty_available = self.with_context(company_owned=True).qty_available
            if qty_available:
                self.standard_price = valuation / qty_available
        return self.write({'property_cost_method': self.cost_method})