from django.test import RequestFactory, SimpleTestCase
from django.urls import resolve, reverse
from unittest.mock import patch

from .. import views


class PublishRouteTests(SimpleTestCase):
    def setUp(self):
        self.factory = RequestFactory()

    def test_publish_url_resolves_to_publish_view(self):
        match = resolve("/task/publish_42/")
        self.assertEqual(match.func, views.publish)
        self.assertEqual(match.kwargs, {"id": 42})

    def test_publish_url_reverse(self):
        url = reverse("publish", args=[7])
        self.assertEqual(url, "/task/publish_7/")

    @patch("fetcher.views.Publisher")
    def test_publish_invokes_publisher(self, mock_publisher_cls):
        mock_instance = mock_publisher_cls.return_value
        mock_instance.publish.return_value = None

        request = self.factory.get("/task/publish_9/")
        response = views.publish(request, 9)

        self.assertEqual(response.status_code, 200)
        mock_publisher_cls.assert_called_once_with()
        mock_instance.publish.assert_called_once_with(9)
        self.assertIn(b"9", response.content)

    @patch("fetcher.views.Publisher")
    def test_publish_reports_error_gracefully(self, mock_publisher_cls):
        mock_instance = mock_publisher_cls.return_value
        mock_instance.publish.side_effect = RuntimeError("boom")

        request = self.factory.get("/task/publish_3/")
        response = views.publish(request, 3)

        self.assertEqual(response.status_code, 200)
        self.assertIn(b"Error publishing", response.content)
        mock_instance.publish.assert_called_once_with(3)