# Copyright (c) 2013  Red Hat, 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 os

import fixtures
import testtools

_USE_AUTHENTICATION = os.environ.get('ZAQARCLIENT_AUTH_FUNCTIONAL', False)
_RUN_FUNCTIONAL = os.environ.get('ZAQARCLIENT_TEST_FUNCTIONAL',
                                 _USE_AUTHENTICATION)


class TestBase(testtools.TestCase):

    transport_cls = None
    is_functional = False

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

        self.conf = {
            'auth_opts': {
                'options': {
                    'os_project_id': 'my-project'
                }
            }
        }
        self.useFixture(fixtures.FakeLogger('zaqar'))

        # NOTE(kgriffs): Don't monkey-patch stdout since it breaks
        # debugging with pdb.
        stderr = self.useFixture(fixtures.StringStream('stderr')).stream
        self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))

        if not _RUN_FUNCTIONAL and self.is_functional:
            self.skipTest('Functional tests disabled')
        elif self.is_functional and _USE_AUTHENTICATION:
            self._setup_auth_params()

    def _setup_auth_params(self):
        # NOTE(flaper87): Hard-code the backend for now since it's the
        # only one we support
        self.conf['auth_opts']['backend'] = 'keystone'
        if 'OS_TOKEN' in os.environ and 'OS_AUTH_URL' in os.environ:
            options = {'os_token': os.environ['OS_TOKEN'],
                       'os_auth_url': os.environ['OS_AUTH_URL']}
        else:
            project_id = os.environ.get('OS_PROJECT_ID',
                                        os.environ.get('OS_TENANT_ID', ''))
            project_name = os.environ.get('OS_PROJECT_NAME',
                                          os.environ.get('OS_TENANT_NAME', ''))

            options = {'os_username': os.environ['OS_USERNAME'],
                       'os_password': os.environ['OS_PASSWORD'],
                       'os_project_id': project_id,
                       'os_project_name': project_name,
                       'os_auth_url': os.environ['OS_AUTH_URL'],
                       'insecure': ''}

        self.conf['auth_opts'].setdefault('options', {}).update(options)

    def config(self, group=None, **kw):
        """Override some configuration values.

        The keyword arguments are the names of configuration options to
        override and their values.

        If a group argument is supplied, the overrides are applied to
        the specified configuration option group.
        """
        parent = (group and self.conf.setdefault(group, {})
                  or self.conf)
        parent.update(kw)