# Copyright (c) 2013 Rackspace, Inc.
#
# 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 io

from requests_mock.contrib import fixture
import testtools

from barbicanclient import barbican as barb
from barbicanclient.barbican import Barbican
from barbicanclient import client
from barbicanclient import exceptions
from barbicanclient.tests import keystone_client_fixtures


class WhenTestingBarbicanCLI(testtools.TestCase):

    def setUp(self):
        super().setUp()
        self.endpoint = 'http://localhost:9311/'
        self.project_id = '1234567890abcdef1234567890abcdef'
        self.responses = self.useFixture(fixture.Fixture())
        self.responses.get(
            'http://localhost:9311/v1/',
            json={
                'version': {
                    'id': 'v1',
                    'status': 'CURRENT',
                    'min_version': '1.0',
                    'max_version': '1.1',
                    'links': [{
                        'rel': 'self',
                        'href': 'http://192.168.122.110/key-manager/v1/'
                    }, {
                        'rel': 'describedby',
                        'type': 'text/html',
                        'href': 'https://docs.openstack.org/'}]}})
        self.responses.get(
            'http://localhost:9311/',
            json={
                "versions": [{
                    "id": "v1",
                    "status": "CURRENT",
                    "min_version": "1.0",
                    "max_version": "1.1",
                    "links": [{
                        "rel": "self",
                        "href": "http://localhost:9311/v1/"
                    }, {
                        "rel": "describedby",
                        "type": "text/html",
                        "href": "https://docs.openstack.org/"}]}]})

        self.captured_stdout = io.StringIO()
        self.captured_stderr = io.StringIO()
        self.barbican = Barbican(
            stdout=self.captured_stdout,
            stderr=self.captured_stderr
        )
        self.parser = self.barbican.build_option_parser('desc', 'vers')

    def assert_client_raises(self, args, message):
        argv, remainder = self.parser.parse_known_args(args.split())
        e = self.assertRaises(
            Exception, self.barbican.create_client, argv
        )
        self.assertIn(message, str(e))

    def create_and_assert_client(self, args):
        argv, remainder = self.parser.parse_known_args(args.split())

        client = self.barbican.create_client(argv)
        self.assertIsNotNone(client)
        return client

    def test_should_show_usage_with_help_flag(self):
        self.assertRaises(SystemExit, self.barbican.run, ['-h'])
        self.assertIn('usage', self.captured_stdout.getvalue())

    def test_should_show_usage_with_no_args(self):
        exit_code = self.barbican.run([])
        self.assertEqual(1, exit_code)
        self.assertIn('usage', self.captured_stderr.getvalue())

    def test_should_error_if_noauth_and_authurl_both_specified(self):
        args = "--no-auth --os-auth-url http://localhost:5000/v3"
        message = (
            'ERROR: argument --os-auth-url/-A: not allowed with '
            'argument --no-auth/-N'
        )
        self.assert_client_raises(args, message)

    def _expect_error_with_invalid_noauth_args(self, args):
        expected_err_msg = (
            'ERROR: please specify --endpoint '
            'and --os-project-id (or --os-tenant-id)'
        )
        self.assert_client_raises(args, expected_err_msg)

    def test_should_error_if_noauth_and_missing_endpoint_tenantid_args(self):
        self._expect_error_with_invalid_noauth_args("--no-auth secret list")
        self._expect_error_with_invalid_noauth_args(
            "--no-auth --endpoint http://xyz secret list")
        self._expect_error_with_invalid_noauth_args(
            "--no-auth --os-tenant-id 123 secret list")
        self._expect_error_with_invalid_noauth_args(
            "--no-auth --os-project-id 123 secret list")

    def test_should_succeed_if_noauth_with_valid_args_specified(self):
        args = (
            '--no-auth --endpoint {0} --os-tenant-id {1}'
            'secret list'.format(self.endpoint, self.project_id)
        )
        list_secrets_url = '{0}/v1/secrets'.format(self.endpoint.rstrip('/'))
        self.responses.get(list_secrets_url, json={"secrets": [], "total": 0})
        client = self.create_and_assert_client(args)
        secret_list = client.secrets.list()
        self.assertTrue(self.responses._adapter.called)
        # there should be two requests
        # 1. requests sent by microversions check
        # 2. the request under test.
        self.assertEqual(2, self.responses._adapter.call_count)
        self.assertEqual([], secret_list)

    def test_should_error_if_required_keystone_auth_arguments_are_missing(
            self):
        expected_error_msg = (
            'ERROR: please specify the following --os-project-id or'
            ' (--os-project-name and --os-project-domain-name) or '
            ' (--os-project-name and --os-project-domain-id)'
        )
        self.assert_client_raises(
            '--os-auth-url http://localhost:35357/v2.0 secret list',
            expected_error_msg)
        self.assert_client_raises(
            '--os-auth-url http://localhost:35357/v2.0 --os-username barbican '
            '--os-password barbican secret list',
            expected_error_msg
        )

    def test_check_auth_arguments_v2(self):
        args = ("--os-username 'bob' --os-password 'jan' --os-auth-url 'boop'"
                " --os-tenant-id 123 --os-identity-api-version '2.0'")
        argv, remainder = self.parser.parse_known_args(args.split())
        api_version = argv.os_identity_api_version
        barbican = Barbican()
        response = barbican.check_auth_arguments(argv, api_version)
        self.assertTrue(response)

    def test_should_fail_check_auth_arguments_v2(self):
        args = ("--os-username bob --os-password jan --os-auth-url boop"
                " --os-identity-api-version 2.0")
        message = 'ERROR: please specify --os-tenant-id or --os-tenant-name'
        argv, remainder = self.parser.parse_known_args(args.split())
        api_version = argv.os_identity_api_version
        e = self.assertRaises(
            Exception,
            self.barbican.check_auth_arguments,
            argv,
            api_version,
            True
        )
        self.assertIn(message, str(e))

    def test_should_fail_create_client_with_no_auth_url(self):
        args = '--os-auth-token 1234567890 --os-tenant-id 123'
        message = 'ERROR: please specify --os-auth-url'
        argv, remainder = self.parser.parse_known_args(args.split())
        e = self.assertRaises(
            Exception, self.barbican.create_client, argv
        )
        self.assertIn(message, str(e))

    def test_should_fail_missing_credentials(self):
        message = 'ERROR: please specify authentication credentials'
        args = ''
        argv, remainder = self.parser.parse_known_args(args.split())
        e = self.assertRaises(
            Exception, self.barbican.create_client, argv
        )
        self.assertIn(message, str(e))

    def test_main(self):
        args = ''
        response = barb.main(args)
        self.assertEqual(1, response)

    def test_default_endpoint_filter_kwargs_set_correctly(self):
        auth_args = ('--no-auth --endpoint http://localhost:9311/ '
                     '--os-project-id project1')
        argv, remainder = self.parser.parse_known_args(auth_args.split())
        barbican_client = self.barbican.create_client(argv)
        httpclient = barbican_client.secrets._api

        self.assertEqual(client.DEFAULT_SERVICE_INTERFACE,
                         httpclient.interface)
        self.assertEqual(client.DEFAULT_SERVICE_TYPE, httpclient.service_type)
        self.assertEqual(client._DEFAULT_API_VERSION, httpclient.version)
        self.assertIsNone(httpclient.service_name)

    def test_endpoint_filter_kwargs_set_correctly(self):
        auth_args = ('--no-auth --endpoint http://localhost:9311/ '
                     '--os-project-id project1')
        endpoint_filter_args = ('--interface private '
                                '--service-type custom-type '
                                '--service-name Burrbican '
                                '--region-name RegionTwo '
                                '--barbican-api-version v1')
        args = auth_args + ' ' + endpoint_filter_args
        argv, remainder = self.parser.parse_known_args(args.split())
        barbican_client = self.barbican.create_client(argv)
        httpclient = barbican_client.secrets._api

        self.assertEqual('private', httpclient.interface)
        self.assertEqual('custom-type', httpclient.service_type)
        self.assertEqual('Burrbican', httpclient.service_name)
        self.assertEqual('RegionTwo', httpclient.region_name)
        self.assertEqual('v1', httpclient.version)

    def test_should_fail_if_provide_unsupported_api_version(self):
        auth_args = ('--no-auth --endpoint http://localhost:9311/ '
                     '--os-project-id project1')
        endpoint_filter_args = ('--interface private '
                                '--service-type custom-type '
                                '--service-name Burrbican '
                                '--region-name RegionTwo '
                                '--barbican-api-version v2')
        args = auth_args + ' ' + endpoint_filter_args
        argv, remainder = self.parser.parse_known_args(args.split())

        self.assertRaises(exceptions.UnsupportedVersion,
                          self.barbican.create_client,
                          argv)

    def test_should_prevent_mutual_exclusive_file_opt(self):
        args = (
            '--no-auth --endpoint {0} --os-tenant-id {1}'
            '--file foo --payload'
            'secret get'.format(self.endpoint, self.project_id)
        )
        list_secrets_url = '{0}/v1/secrets'.format(self.endpoint.rstrip('/'))
        self.responses.get(list_secrets_url, json={"secrets": [], "total": 0})
        client = self.create_and_assert_client(args)
        secret_list = client.secrets.list()
        self.assertTrue(self.responses._adapter.called)
        self.assertEqual(2, self.responses._adapter.call_count)
        self.assertEqual([], secret_list)

    def test_insecure_true_kwargs_set_correctly(self):
        auth_args = ('--no-auth --endpoint http://localhost:9311/ '
                     '--os-project-id project1')
        endpoint_filter_args = ('--interface public '
                                '--service-type custom-type '
                                '--service-name Burrbican '
                                '--region-name RegionTwo '
                                '--barbican-api-version v1')
        args = auth_args + ' ' + endpoint_filter_args
        argv, remainder = self.parser.parse_known_args(args.split())
        argv.insecure = True
        argv.os_identity_api_version = '2.0'
        argv.os_tenant_name = 'my_tenant_name'
        barbican_client = self.barbican.create_client(argv)
        httpclient = barbican_client.secrets._api
        self.assertFalse(httpclient.session.verify)


class TestBarbicanWithKeystonePasswordAuth(
        keystone_client_fixtures.KeystoneClientFixture):

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

        self.test_arguments = {
            '--os-username': 'some_user',
            '--os-password': 'some_pass',
        }


class TestBarbicanWithKeystoneTokenAuth(
        keystone_client_fixtures.KeystoneClientFixture):

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

        self.test_arguments = {
            '--os-auth-token': 'some_token',
            '--os-project-id': 'some_project_id',
        }