# -*- encoding: utf-8 -*-
#
# Copyright © 2012 New Dream Network, LLC (DreamHost)
#
# Author: Julien Danjou <julien@danjou.info>
#
# 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.
"""Converters for producing volume counter messages from cinder notification
events.
"""

from ceilometer import counter
from ceilometer import plugin


class _Base(plugin.NotificationBase):
    """Convert compute.instance.* notifications into Counters
    """

    metadata_keys = [
        "status",
        "display_name",
        "volume_type",
        "size",
    ]

    @staticmethod
    def get_event_types():
        return ['volume.exists',
                'volume.create.end',
                'volume.delete.end',
        ]


class Volume(_Base):

    def process_notification(self, message):
        return [
            counter.Counter(source='?',
                            name='volume',
                            type='absolute',
                            volume=1,
                            user_id=message['payload']['user_id'],
                            project_id=message['payload']['tenant_id'],
                            resource_id=message['payload']['volume_id'],
                            timestamp=message['timestamp'],
                            duration=None,
                            resource_metadata=self.notification_to_metadata(
                                message),
                            ),
        ]


class VolumeSize(_Base):

    def process_notification(self, message):
        return [
            counter.Counter(source='?',
                            name='volume_size',
                            type='absolute',
                            volume=message['payload']['size'],
                            user_id=message['payload']['user_id'],
                            project_id=message['payload']['tenant_id'],
                            resource_id=message['payload']['volume_id'],
                            timestamp=message['timestamp'],
                            duration=None,
                            resource_metadata=self.notification_to_metadata(
                                message),
                            ),
        ]