# Part of Odoo. See LICENSE file for full copyright and licensing details.

import pytz

from odoo import models, fields
from odoo.osv import expression
from odoo.http import request


class Website(models.Model):
    _inherit = 'website'

    tz = fields.Selection(
        selection='_tz_get',
        required=True,
        default=lambda self: self.env.user.tz or 'UTC',
        string="Timezone",
        help="Select your website timezone here."
    )

    def _tz_get(self):
        return [
            (tz, f'{tz} {self._get_utc_offset(tz)}')
            for tz in sorted(
                pytz.all_timezones, key=lambda tz: tz if not tz.startswith('Etc/') else '_'
            )
        ]

    def _product_domain(self):
        return expression.OR([[('rent_ok', '=', True)], super()._product_domain()])

    def _is_customer_in_the_same_timezone(self):
        """ Return whether the customer is on the same timezone as the website or not.

        Compare the timezone offset between the website and the customer's browser.

        :return: Whether the customer is on the same timezone as the website or not.
        :rtype: bool
        """
        now = fields.datetime.now()
        customer_tz = request.cookies.get('tz') if request else None
        return pytz.timezone(self.tz).utcoffset(now) != pytz.timezone(
            customer_tz or 'UTC'
        ).utcoffset(now)

    def _get_utc_offset(self, tz):
        """ Return the offset between UTC and the provided timezone
        :return: (UTC ±HH:MM)
        :rtype: string
        """
        # strftime('%z') return the UTC offset in this form: ±HHMM[SS[.ffffff]]
        utcoffset = pytz.timezone(tz).localize(fields.datetime.now()).strftime('%z')
        return f'(UTC {utcoffset[0]} {utcoffset[1:3]}:{utcoffset[3:5]})'