from odoo.http import request
from odoo.addons.website_sale.controllers.main import PaymentPortal


class PaymentPortalOnsite(PaymentPortal):

    def _validate_transaction_for_order(self, transaction, sale_order_id):
        """
        Throws a ValidationError if the user tries to pay for a ticket which isn't available
        """
        super()._validate_transaction_for_order(transaction, sale_order_id)
        sale_order = request.env['sale.order'].browse(sale_order_id).exists()
        count_per_ticket = request.env['event.registration'].sudo()._read_group(
            [('sale_order_id', 'in', sale_order.ids), ('state', '!=', 'cancel'), ('event_ticket_id', '!=', False)],
            ['event_ticket_id'], ['__count']
        )
        for ticket, count in count_per_ticket:
            ticket._check_seats_availability(minimal_availability=count)