from django.contrib.auth import get_user_model
from django.test import SimpleTestCase, TestCase
from django.urls import reverse
from taggit.models import Tag

from web.legacy_links import build_canonical_url, replace_legacy_links


class LegacyLinksTests(SimpleTestCase):
	def test_build_canonical_url_without_slug(self):
		self.assertEqual(build_canonical_url(123, ''), '/item/123-')

	def test_replace_legacy_links_rewrites_internal_urls(self):
		text = (
			'<a href="/news/1-latest-news/123-old-title.html">link</a>'
			'<a href="http://www.cadpoint.ru/component/content/article/456-some-article.html">x</a>'
			'<a href="https://example.com/news/1-latest-news/123-old-title.html">external</a>'
		)
		new_text, matches = replace_legacy_links(text, {123: 'new-title', 456: 'article-title'})

		self.assertIn('/item/123-new-title', new_text)
		self.assertIn('/item/456-article-title', new_text)
		self.assertIn('https://example.com/news/1-latest-news/123-old-title.html', new_text)
		self.assertEqual(len(matches), 2)

	def test_replace_legacy_links_does_not_touch_image_urls(self):
		text = (
			'<a href="/news/1-latest-news/123-old-title.html">link</a>'
			'<img src="/images/stories/news/photo123.jpg" alt="photo">'
		)
		new_text, matches = replace_legacy_links(text, {123: 'new-title'})

		self.assertIn('/item/123-new-title', new_text)
		self.assertIn('/images/stories/news/photo123.jpg', new_text)
		self.assertEqual(len(matches), 1)


class TagAutocompleteTests(TestCase):
	def setUp(self):
		user_model = get_user_model()
		self.user = user_model.objects.create_superuser(
			username='admin',
			email='admin@example.com',
			password='password',
		)
		Tag.objects.create(name='alpha')
		Tag.objects.create(name='beta')
		Tag.objects.create(name='gamma')
		self.client.force_login(self.user)

	def test_returns_tag_results_for_term(self):
		response = self.client.get(
			reverse('web_tag_autocomplete'),
			{'term': 'al'},
		)

		self.assertEqual(response.status_code, 200)
		payload = response.json()
		self.assertEqual(payload['pagination']['more'], False)
		self.assertEqual([item['text'] for item in payload['results']], ['alpha'])

	def test_returns_initial_tag_batch_without_term(self):
		response = self.client.get(reverse('web_tag_autocomplete'))

		self.assertEqual(response.status_code, 200)
		payload = response.json()
		self.assertEqual(len(payload['results']), 3)
		self.assertEqual(payload['pagination']['more'], False)

	def test_paginates_tag_results(self):
		Tag.objects.all().delete()
		for index in range(30):
			Tag.objects.create(name=f'tag-{index:02d}')

		response = self.client.get(reverse('web_tag_autocomplete'), {'page': 1})
		self.assertEqual(response.status_code, 200)
		payload = response.json()
		self.assertEqual(len(payload['results']), 25)
		self.assertEqual(payload['pagination']['more'], True)

		response = self.client.get(reverse('web_tag_autocomplete'), {'page': 2})
		self.assertEqual(response.status_code, 200)
		payload = response.json()
		self.assertEqual(len(payload['results']), 5)
		self.assertEqual(payload['pagination']['more'], False)