# Copyright 2011, 2013 Michael Telahun Makonnen <mmakonnen@gmail.com>
# Copyright 2016 OpenSynergy Indonesia
# Copyright 2018 Brainbean Apps (https://brainbeanapps.com)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

import logging
import random
import string

from odoo import _, api, fields, models
from odoo.exceptions import UserError

_logger = logging.getLogger(__name__)


class HrEmployee(models.Model):
    """Implement company wide unique identification number."""

    _inherit = "hr.employee"

    identification_id = fields.Char(string="Identification No", copy=False)

    _sql_constraints = [
        (
            "identification_id_uniq",
            "unique(identification_id)",
            "The Employee Number must be unique across the company(s).",
        ),
    ]

    @api.model
    def _generate_identification_id(self):
        """Generate a random employee identification number"""
        company = self.env.user.company_id

        steps = 0
        for _retry in range(50):
            employee_id = False
            if company.employee_id_gen_method == "sequence":
                if not company.employee_id_sequence:
                    _logger.warning("No sequence configured for employee ID generation")
                    return employee_id
                employee_id = company.employee_id_sequence.next_by_id()
            elif company.employee_id_gen_method == "random":
                employee_id_random_digits = company.employee_id_random_digits
                rnd = random.SystemRandom()
                employee_id = "".join(
                    rnd.choice(string.digits) for x in range(employee_id_random_digits)
                )

            if self.search_count([("identification_id", "=", employee_id)]):
                steps += 1
                continue

            return employee_id

        raise UserError(
            _("Unable to generate unique Employee ID in %d steps.") % (steps,)
        )

    @api.model_create_multi
    def create(self, vals_list):
        records = super().create(vals_list)

        for record in records:
            if not record.identification_id:
                record.identification_id = record._generate_identification_id()

        return records