from odoo import fields, http
from odoo.exceptions import AccessDenied
from odoo.http import request


def _require_registration_desk():
    if not request.env.user.has_group('event.group_event_registration_desk'):
        raise AccessDenied()


def _redirect_to_login_if_public(path):
    """Manual login-required redirect - see community_classifieds for why this
    is needed instead of auth='user' (a bug in this Odoo version's own
    SessionExpiredException -> login-redirect handling)."""
    if request.env.user._is_public():
        return request.redirect(f'/web/login?redirect={path}')
    return None


class EventCheckinController(http.Controller):

    @http.route(['/event/checkin', '/event/checkin/<int:event_id>'], type='http', auth='public', website=True)
    def checkin_page(self, event_id=None, **kwargs):
        redirect = _redirect_to_login_if_public('/event/checkin')
        if redirect:
            return redirect
        _require_registration_desk()
        events = request.env['event.event'].search([('date_end', '>=', fields.Datetime.now())])
        event = request.env['event.event'].browse(event_id) if event_id else events[:1]
        return request.render('event_qr_ticketing.checkin_page', {
            'events': events,
            'event': event,
        })

    @http.route(['/event/checkin/scan'], type='jsonrpc', auth='user', website=True)
    def checkin_scan(self, value=None, manual=False, **kwargs):
        _require_registration_desk()
        Registration = request.env['event.registration']

        if manual:
            status, registration = Registration._lookup_by_ticket_ref((value or '').strip())
        else:
            status, registration = Registration._verify_scanned_token(value)

        result = {'status': status}
        if registration:
            result.update(
                name=registration.name or registration.partner_id.name,
                event=registration.event_id.name,
                ticket_ref=registration.ticket_ref,
            )
            if status == 'ok':
                registration.action_check_in()

        return result

    @http.route(['/event/checkin/dashboard/<int:event_id>'], type='jsonrpc', auth='user', website=True)
    def checkin_dashboard(self, event_id, **kwargs):
        _require_registration_desk()
        event = request.env['event.event'].browse(event_id)
        registrations = event.registration_ids.filtered(lambda r: r.state in ('open', 'done'))
        return {
            'registered': len(registrations),
            'checked_in': len(registrations.filtered('checked_in')),
        }