# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from odoo import models, fields, api
from odoo.exceptions import ValidationError
from odoo.tools.translate import _


class HrEmployee(models.Model):
    _inherit = "hr.employee"

    insz_or_bis_number = fields.Char("INSZ or BIS number", groups="hr.group_hr_manager")
    clocked_session_ids = fields.Many2many(
        "pos.session",
        "employees_session_clocking_info",
        string="Users Clocked In",
        help="This is a technical field used for tracking the status of the session for each employees.",
    )

    @api.constrains("insz_or_bis_number")
    def _check_insz_or_bis_number(self):
        for emp in self:
            insz_number = emp.insz_or_bis_number
            if insz_number and not self.is_valid_insz_or_bis_number(insz_number):
                raise ValidationError(_("The INSZ or BIS number is not valid."))

    def is_valid_insz_or_bis_number(self, number):
        if not number:
            return False
        if len(number) != 11 or not number.isdigit():
            return False

        partial_number = number[:-2]
        if self.birthday.year >= 2000:
            partial_number = '2' + partial_number
        modulo = int(partial_number) % 97

        return modulo == 97 - int(number[-2:])