# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import copy
import uuid

from keystoneclient import access
from keystoneclient.auth.identity import v3
from keystoneclient import fixture
from keystoneclient import session
from keystoneclient.tests.unit import utils


class TesterFederationPlugin(v3.FederatedBaseAuth):

    def get_unscoped_auth_ref(self, sess, **kwargs):
        # This would go and talk to an idp or something
        resp = sess.post(self.federated_token_url, authenticated=False)
        return access.AccessInfo.factory(resp=resp, body=resp.json())


class V3FederatedPlugin(utils.TestCase):

    AUTH_URL = 'http://keystone/v3'

    def setUp(self):
        super(V3FederatedPlugin, self).setUp()

        self.deprecations.expect_deprecations()

        self.unscoped_token = fixture.V3Token()
        self.unscoped_token_id = uuid.uuid4().hex
        self.scoped_token = copy.deepcopy(self.unscoped_token)
        self.scoped_token.set_project_scope()
        self.scoped_token.methods.append('token')
        self.scoped_token_id = uuid.uuid4().hex

        s = self.scoped_token.add_service('compute', name='nova')
        s.add_standard_endpoints(public='http://nova/public',
                                 admin='http://nova/admin',
                                 internal='http://nova/internal')

        self.idp = uuid.uuid4().hex
        self.protocol = uuid.uuid4().hex

        self.token_url = ('%s/OS-FEDERATION/identity_providers/%s/protocols/%s'
                          '/auth' % (self.AUTH_URL, self.idp, self.protocol))

        headers = {'X-Subject-Token': self.unscoped_token_id}
        self.unscoped_mock = self.requests_mock.post(self.token_url,
                                                     json=self.unscoped_token,
                                                     headers=headers)

        headers = {'X-Subject-Token': self.scoped_token_id}
        auth_url = self.AUTH_URL + '/auth/tokens'
        self.scoped_mock = self.requests_mock.post(auth_url,
                                                   json=self.scoped_token,
                                                   headers=headers)

    def get_plugin(self, **kwargs):
        kwargs.setdefault('auth_url', self.AUTH_URL)
        kwargs.setdefault('protocol', self.protocol)
        kwargs.setdefault('identity_provider', self.idp)
        return TesterFederationPlugin(**kwargs)

    def test_federated_url(self):
        plugin = self.get_plugin()
        self.assertEqual(self.token_url, plugin.federated_token_url)

    def test_unscoped_behaviour(self):
        sess = session.Session(auth=self.get_plugin())
        self.assertEqual(self.unscoped_token_id, sess.get_token())

        self.assertTrue(self.unscoped_mock.called)
        self.assertFalse(self.scoped_mock.called)

    def test_scoped_behaviour(self):
        auth = self.get_plugin(project_id=self.scoped_token.project_id)
        sess = session.Session(auth=auth)
        self.assertEqual(self.scoped_token_id, sess.get_token())

        self.assertTrue(self.unscoped_mock.called)
        self.assertTrue(self.scoped_mock.called)

    def test_options(self):
        opts = [o.name for o in v3.FederatedBaseAuth.get_options()]

        self.assertIn('protocol', opts)
        self.assertIn('identity-provider', opts)
