import json

from django.contrib.auth.models import User
from django.test import TestCase

from .models import ApiToken
from books.models import EBook, EBookProgress, EBookHighlights


class ApiTokenAuthMiddlewareTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.token = ApiToken.objects.create(user=self.user)

    def test_valid_bearer_token_authenticates(self):
        resp = self.client.get('/books/', HTTP_AUTHORIZATION=f'Bearer {self.token.token}')
        self.assertEqual(resp.status_code, 200)

    def test_missing_token_is_unauthenticated(self):
        resp = self.client.get('/books/')
        self.assertEqual(resp.status_code, 401)

    def test_invalid_token_is_unauthenticated(self):
        resp = self.client.get('/books/', HTTP_AUTHORIZATION='Bearer not-a-real-token')
        self.assertEqual(resp.status_code, 401)

    def test_token_scoped_to_owning_user(self):
        other = User.objects.create_user(username='bob', password='pw12345678')
        EBook.objects.create(user=other, meta_ct='ct', meta_iv='iv', data_ct='ct', data_iv='iv')
        resp = self.client.get('/books/', HTTP_AUTHORIZATION=f'Bearer {self.token.token}')
        self.assertEqual(resp.json(), [])

    def test_regenerate_invalidates_old_token(self):
        old = self.token.token
        self.token.regenerate()
        resp = self.client.get('/books/', HTTP_AUTHORIZATION=f'Bearer {old}')
        self.assertEqual(resp.status_code, 401)
        resp = self.client.get('/books/', HTTP_AUTHORIZATION=f'Bearer {self.token.token}')
        self.assertEqual(resp.status_code, 200)

    def test_regenerate_view_requires_login_and_rotates_token(self):
        resp = self.client.post('/accounts/api-token/regenerate/')
        self.assertEqual(resp.status_code, 302)
        self.assertIn('/accounts/login/', resp.url)

        self.client.login(username='alice', password='pw12345678')
        old = self.token.token
        resp = self.client.post('/accounts/api-token/regenerate/')
        self.assertRedirects(resp, '/accounts/settings/')
        self.token.refresh_from_db()
        self.assertNotEqual(self.token.token, old)


class SyncSnapshotTests(TestCase):
    def setUp(self):
        self.user = User.objects.create_user(username='alice', password='pw12345678')
        self.token = ApiToken.objects.create(user=self.user)
        self.book = EBook.objects.create(
            user=self.user, meta_ct='meta-ct', meta_iv='meta-iv', data_ct='data-ct', data_iv='data-iv',
        )
        EBookProgress.objects.create(
            user=self.user, book=self.book, scroll_fraction=0.5, position_anchor='3:0.5',
        )
        EBookHighlights.objects.create(user=self.user, book=self.book, ct='hl-ct', iv='hl-iv')

    def test_requires_auth(self):
        resp = self.client.get('/api/sync/')
        self.assertEqual(resp.status_code, 401)

    def test_snapshot_shape_and_data(self):
        resp = self.client.get('/api/sync/', HTTP_AUTHORIZATION=f'Bearer {self.token.token}')
        self.assertEqual(resp.status_code, 200)
        data = resp.json()
        for key in (
            'server_time', 'books', 'book_progress', 'book_highlights', 'book_bookmarks',
            'podcast_feeds', 'episode_progress', 'podcast_queue', 'saved_stations',
        ):
            self.assertIn(key, data)

        self.assertEqual(len(data['books']), 1)
        self.assertEqual(data['books'][0]['meta_ct'], 'meta-ct')

        self.assertEqual(len(data['book_progress']), 1)
        self.assertEqual(data['book_progress'][0]['book_id'], self.book.id)
        self.assertEqual(data['book_progress'][0]['position_anchor'], '3:0.5')

        self.assertEqual(len(data['book_highlights']), 1)
        self.assertEqual(data['book_highlights'][0]['ct'], 'hl-ct')

        # No data_ct/data_iv leaked into the snapshot (book bytes stay lazy-fetched)
        self.assertNotIn('data_ct', data['books'][0])