from django.contrib.auth.models import User
from django.core.cache import cache
from rest_framework.test import APITestCase
from rest_framework.authtoken.models import Token
from django.core.exceptions import SuspiciousOperation

from api.models import App, Certificate
from api.tests import TEST_ROOT


class CertificateTest(APITestCase):

    """Tests creation of domain SSL certificates"""

    fixtures = ['tests.json']

    def setUp(self):
        self.user = User.objects.get(username='autotest')
        self.token = Token.objects.get(user=self.user).key
        self.client.credentials(HTTP_AUTHORIZATION='Token ' + self.token)

        self.url = '/v2/certs'
        self.app = App.objects.create(owner=self.user, id='test-app')
        self.domain = 'autotest.example.com'

        with open('{}/certs/{}.key'.format(TEST_ROOT, self.domain)) as f:
            self.key = f.read()

        with open('{}/certs/{}.cert'.format(TEST_ROOT, self.domain)) as f:
            self.cert = f.read()

    def tearDown(self):
        # make sure every test has a clean slate for k8s mocking
        cache.clear()

    def test_create_certificate_with_domain(self):
        """Tests creating a certificate."""
        response = self.client.post(
            self.url,
            {
                'name': 'random-test-cert',
                'certificate': self.cert,
                'key': self.key
            }
        )
        self.assertEqual(response.status_code, 201, response.data)

    def test_update_certificate(self):
        """Tests update of a certificate."""
        response = self.client.post(
            self.url,
            {
                'name': 'random-test-cert',
                'certificate': self.cert,
                'key': self.key
            }
        )
        self.assertEqual(response.status_code, 201, response.data)

    def test_create_certificate_with_different_common_name(self):
        """
        Make sure common_name is read-only
        """
        response = self.client.post(
            self.url,
            {
                'name': 'random-test-cert',
                'certificate': self.cert,
                'key': self.key,
                'common_name': 'foo.example.com'
            }
        )
        self.assertEqual(response.status_code, 201, response.data)
        self.assertEqual(response.data['common_name'], 'autotest.example.com')

    def test_get_certificate_screens_data(self):
        """
        When a user retrieves a certificate, only the common name and expiry date should be
        displayed.
        """
        response = self.client.post(
            self.url,
            {
                'name': 'random-test-cert',
                'certificate': self.cert,
                'key': self.key
            }
        )
        self.assertEqual(response.status_code, 201, response.data)

        response = self.client.get('{}/{}'.format(self.url, 'random-test-cert'))
        self.assertEqual(response.status_code, 200, response.data)

        expected = {
            'common_name': 'autotest.example.com',
            'expires': '2016-03-05T17:14:27Z',
            'fingerprint': '37:24:D8:EB:DC:A4:2C:DA:88:55:C5:19:71:D3:9B:43:BA:AC:3A:CE:33:8E:07:52:1C:51:01:A0:97:43:C9:4D',  # noqa
            'san': [],
            'domains': [],
        }
        for key, value in list(expected.items()):
            self.assertEqual(response.data[key], value, key)

    def test_certficate_denied_requests(self):
        """Disallow put/patch requests"""
        response = self.client.put(self.url)
        self.assertEqual(response.status_code, 405, response.content)
        response = self.client.patch(self.url)
        self.assertEqual(response.status_code, 405, response.content)

    def test_delete_certificate(self):
        """Destroying a certificate should generate a 204 response"""
        Certificate.objects.create(
            name='random-test-cert',
            owner=self.user,
            common_name='autotest.example.com',
            certificate=self.cert
        )
        url = '/v2/certs/random-test-cert'
        response = self.client.delete(url)
        self.assertEqual(response.status_code, 204, response.data)

    def test_create_invalid_cert(self):
        """Upload a cert that can't be loaded by pyopenssl"""
        response = self.client.post(
            self.url,
            {
                'name': 'random-test-cert',
                'certificate': 'i am bad data',
                'key': 'i am bad data as well'
            }
        )
        self.assertEqual(response.status_code, 400, response.data)
        # match partial since right now the rest is pyopenssl errors
        self.assertIn('Could not load certificate', response.data['certificate'][0])

    def test_load_invalid_cert(self):
        """Inject a cert that can't be loaded by pyopenssl"""

        with self.assertRaises(SuspiciousOperation):
            Certificate.objects.create(
                owner=self.user,
                name='random-test-cert',
                certificate='i am bad data',
                key='i am bad data as well'
            )