from datetime import timedelta

from django.contrib.auth import get_user_model
from django.core import mail
from django.test import TestCase
from django.test.utils import override_settings
from django.urls import reverse
from django.utils import timezone

from bookings.models import Reservation, ReservationToken
from checkins.models import CheckIn
from shows.models import Performance, Show, Venue


@override_settings(
    EMAIL_BACKEND="django.core.mail.backends.locmem.EmailBackend",
    SITE_BASE_URL="https://tickets.azionelab.example",
)
class ReservationAdminTests(TestCase):
    def setUp(self):
        user_model = get_user_model()
        self.admin_user = user_model.objects.create_superuser(
            username="admin-bookings",
            email="admin@example.com",
            password="password123",
        )
        self.client.force_login(self.admin_user)
        self.show = Show.objects.create(
            title="Open Stage",
            slug="open-stage-admin",
            is_published=True,
        )
        self.venue = Venue.objects.create(
            name="AzioneLab Theatre",
            slug="azionelab-theatre-admin",
            address="Via Example 1",
            city="Rome",
        )
        self.performance = Performance.objects.create(
            show=self.show,
            venue=self.venue,
            starts_at=timezone.now() + timedelta(days=7),
            room_capacity=20,
        )

    def test_reservation_add_page_accepts_preselected_performance(self):
        response = self.client.get(
            reverse("admin:bookings_reservation_add"),
            {"performance": self.performance.id},
        )

        self.assertEqual(response.status_code, 200)
        self.assertContains(response, "Create manual reservation")
        self.assertContains(response, "The reservation stays pending")

    def test_admin_can_create_manual_reservation_with_standard_email_flow(self):
        with self.captureOnCommitCallbacks(execute=True):
            response = self.client.post(
                reverse("admin:bookings_reservation_add"),
                {
                    "performance": self.performance.id,
                    "name": "Maria Rossi",
                    "email": "maria@example.com",
                    "phone": "+390600000000",
                    "party_size": 2,
                    "notes": "Entered by staff at the venue desk.",
                    "_save": "Save",
                },
            )

        reservation = Reservation.objects.get()
        self.assertEqual(response.status_code, 302)
        self.assertEqual(reservation.performance, self.performance)
        self.assertEqual(reservation.status, Reservation.Status.PENDING)
        self.assertEqual(reservation.party_size, 2)
        self.assertTrue(
            ReservationToken.objects.filter(
                reservation=reservation,
                purpose=ReservationToken.Purpose.CONFIRMATION,
            ).exists()
        )
        self.assertEqual(len(mail.outbox), 1)
        self.assertIn(
            "https://tickets.azionelab.example/api/reservations/confirm/?token=",
            mail.outbox[0].body,
        )

    def test_token_hash_is_hidden_in_token_admin_views(self):
        reservation = Reservation.objects.create(
            performance=self.performance,
            name="Maria Rossi",
            email="maria@example.com",
            party_size=2,
        )
        token, _ = ReservationToken.create_token(
            reservation=reservation,
            purpose=ReservationToken.Purpose.CONFIRMATION,
            expires_at=timezone.now() + timedelta(hours=2),
        )

        changelist_response = self.client.get(reverse("admin:bookings_reservationtoken_changelist"))
        change_response = self.client.get(
            reverse("admin:bookings_reservationtoken_change", args=[token.id]),
        )

        self.assertEqual(changelist_response.status_code, 200)
        self.assertEqual(change_response.status_code, 200)
        self.assertNotContains(changelist_response, token.token_hash)
        self.assertNotContains(change_response, token.token_hash)
        self.assertContains(change_response, token.get_purpose_display())
        self.assertContains(change_response, "Expires at")
        self.assertContains(change_response, "Used at")

    def test_admin_can_confirm_pending_reservation_manually_and_get_qr_access(self):
        reservation = Reservation.objects.create(
            performance=self.performance,
            name="Maria Rossi",
            email="maria@example.com",
            party_size=2,
        )
        confirmation_token, _ = ReservationToken.create_token(
            reservation=reservation,
            purpose=ReservationToken.Purpose.CONFIRMATION,
            expires_at=timezone.now() + timedelta(hours=2),
        )

        response = self.client.post(
            reverse("admin:bookings_reservation_manual_confirm", args=[reservation.id]),
        )

        reservation.refresh_from_db()
        confirmation_token.refresh_from_db()
        self.assertEqual(response.status_code, 200)
        self.assertEqual(reservation.status, Reservation.Status.CONFIRMED)
        self.assertIsNotNone(confirmation_token.used_at)
        self.assertContains(response, "Reservation confirmed manually")
        self.assertContains(response, "/api/check-ins/preview/?token=")
        self.assertTrue(
            ReservationToken.objects.filter(
                reservation=reservation,
                purpose=ReservationToken.Purpose.CHECK_IN,
            ).exists()
        )

    def test_admin_can_mark_confirmed_reservation_as_checked_in(self):
        reservation = Reservation.objects.create(
            performance=self.performance,
            name="Checked Guest",
            email="checked@example.com",
            party_size=1,
            status=Reservation.Status.CONFIRMED,
            confirmed_at=timezone.now(),
        )

        response = self.client.post(
            reverse("admin:bookings_reservation_manual_check_in", args=[reservation.id]),
        )

        self.assertEqual(response.status_code, 302)
        check_in = CheckIn.objects.get(reservation=reservation)
        self.assertEqual(check_in.checked_in_by, self.admin_user)
        self.assertEqual(check_in.source, CheckIn.Source.MANUAL)