# Copyright (c) 2017 Fujitsu Limited.
# 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 neutron_lib.api.definitions import portbindings
from neutron_lib.callbacks import resources
from neutron_lib.services.logapi import constants as log_const
from oslo_log import log as logging
from oslo_utils import importutils

from neutron.services.logapi.common import sg_callback
from neutron.services.logapi.drivers import base
from neutron.services.logapi.drivers import manager
from neutron.services.logapi.rpc import server as server_rpc

LOG = logging.getLogger(__name__)

DRIVER = None

SUPPORTED_LOGGING_TYPES = ('security_group',)


class OVSDriver(base.DriverBase):

    @staticmethod
    def create():
        return OVSDriver(
            name='openvswitch',
            vif_types=[portbindings.VIF_TYPE_OVS,
                       portbindings.VIF_TYPE_VHOST_USER],
            vnic_types=[portbindings.VNIC_NORMAL],
            supported_logging_types=SUPPORTED_LOGGING_TYPES,
            requires_rpc=True)


def register():
    """Register the driver."""
    global DRIVER
    if not DRIVER:
        DRIVER = OVSDriver.create()

        # Register RPC methods
        if DRIVER.requires_rpc:
            rpc_methods = [
                {resources.PORT: server_rpc.get_sg_log_info_for_port},
                {log_const.LOG_RESOURCE:
                 server_rpc.get_sg_log_info_for_log_resources}
            ]
            DRIVER.register_rpc_methods(log_const.SECURITY_GROUP, rpc_methods)
    # Trigger decorator
    importutils.import_module(
        'neutron.services.logapi.common.sg_validate'
    )
    # Register resource callback handler
    manager.register(
        resources.SECURITY_GROUP_RULE, sg_callback.SecurityGroupRuleCallBack)

    LOG.debug('Open vSwitch logging driver registered')
