# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright 2012 OpenStack LLC.
# All Rights Reserved
#
#    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.

from nova import config
from nova import exception
from nova import flags
from nova.openstack.common import excutils
from nova.openstack.common import log as logging
from quantumclient import client
from quantumclient.v2_0 import client as clientv20

CONF = config.CONF
LOG = logging.getLogger(__name__)


def _get_auth_token():
    try:
        httpclient = client.HTTPClient(
            username=CONF.quantum_admin_username,
            tenant_name=CONF.quantum_admin_tenant_name,
            password=CONF.quantum_admin_password,
            auth_url=CONF.quantum_admin_auth_url,
            timeout=CONF.quantum_url_timeout,
            auth_strategy=CONF.quantum_auth_strategy)
        httpclient.authenticate()
    except Exception:
        with excutils.save_and_reraise_exception():
            LOG.exception(_("_get_auth_token() failed"))
    return httpclient.auth_token


def get_client(context):
    token = context.auth_token
    if not token and CONF.quantum_auth_strategy:
        token = _get_auth_token()
    params = {
        'endpoint_url': CONF.quantum_url,
        'timeout': CONF.quantum_url_timeout,
    }
    if token:
        params['token'] = token
    else:
        params['auth_strategy'] = None
    return clientv20.Client(**params)
