# Copyright 2011 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.

'''messaging based notification driver, with message envelopes'''

from oslo.config import cfg

from heat.openstack.common import context as req_context
from heat.openstack.common.gettextutils import _
from heat.openstack.common import log as logging
from heat.openstack.common import rpc

LOG = logging.getLogger(__name__)

notification_topic_opt = cfg.ListOpt(
    'topics', default=['notifications', ],
    help='AMQP topic(s) used for openstack notifications')

opt_group = cfg.OptGroup(name='rpc_notifier2',
                         title='Options for rpc_notifier2')

CONF = cfg.CONF
CONF.register_group(opt_group)
CONF.register_opt(notification_topic_opt, opt_group)


def notify(context, message):
    """Sends a notification via RPC"""
    if not context:
        context = req_context.get_admin_context()
    priority = message.get('priority',
                           CONF.default_notification_level)
    priority = priority.lower()
    for topic in CONF.rpc_notifier2.topics:
        topic = '%s.%s' % (topic, priority)
        try:
            rpc.notify(context, topic, message, envelope=True)
        except Exception:
            LOG.exception(_("Could not send notification to %(topic)s. "
                            "Payload=%(message)s"), locals())
