from datetime import timedelta
from tempfile import TemporaryDirectory

from django.core.files.uploadedfile import SimpleUploadedFile
from django.test import override_settings
from django.urls import reverse
from django.utils import timezone
from rest_framework import status
from rest_framework.test import APITestCase

from shows.models import Performance, Show, Venue


SMALL_GIF = (
    b"GIF89a\x01\x00\x01\x00\x80\x00\x00"
    b"\x00\x00\x00\xff\xff\xff!\xf9\x04\x01"
    b"\x00\x00\x00\x00,\x00\x00\x00\x00\x01"
    b"\x00\x01\x00\x00\x02\x02D\x01\x00;"
)


class ShowApiTests(APITestCase):
    def setUp(self):
        self.temp_media = TemporaryDirectory()
        self.addCleanup(self.temp_media.cleanup)
        self.settings_override = override_settings(MEDIA_ROOT=self.temp_media.name)
        self.settings_override.enable()
        self.addCleanup(self.settings_override.disable)

        self.show = Show.objects.create(
            title="Open Stage",
            slug="open-stage-media",
            summary="A contemporary theatre performance.",
            description="Full public show description.",
            poster_image="https://cdn.example.com/open-stage-poster.jpg",
            is_published=True,
        )
        self.external_only_show = Show.objects.create(
            title="External Poster Stage",
            slug="external-poster-stage",
            summary="External image only.",
            description="External image only.",
            poster_image="https://cdn.example.com/external-only.jpg",
            is_published=True,
        )
        self.venue = Venue.objects.create(
            name="AzioneLab Theatre",
            slug="azionelab-theatre-show-api",
            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_show_list_prefers_uploaded_image_url_when_present(self):
        self.show.uploaded_image.save(
            "open-stage.gif",
            SimpleUploadedFile("open-stage.gif", SMALL_GIF, content_type="image/gif"),
            save=True,
        )

        response = self.client.get(reverse("api-show-list"))

        self.assertEqual(response.status_code, status.HTTP_200_OK)
        list_item = next(item for item in response.data["results"] if item["slug"] == self.show.slug)
        self.assertTrue(list_item["image_url"].endswith("/media/shows/open-stage.gif"))
        self.assertEqual(list_item["poster_image"], "https://cdn.example.com/open-stage-poster.jpg")

    def test_show_detail_falls_back_to_existing_external_image_url(self):
        response = self.client.get(reverse("api-show-detail", kwargs={"slug": self.external_only_show.slug}))

        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response.data["image_url"], "https://cdn.example.com/external-only.jpg")