#!/usr/bin/env python
#
# Copyright 2016 the original author or authors.
#
# 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 lxml import etree
import structlog
from netconf.nc_rpc.rpc import Rpc
import netconf.nc_common.error as ncerror

log = structlog.get_logger()

class CloseSession(Rpc):

    def __init__(self, rpc_request, rpc_method, grpc_client, session):
        super(CloseSession, self).__init__(rpc_request, rpc_method,
                                           grpc_client, session)
        self._validate_parameters()

    def execute(self):
        log.info('close-session-request', session=self.session.session_id)
        if self.rpc_response.is_error:
            return self.rpc_response

        self.rpc_response.node = etree.Element("ok")
        return self.rpc_response


    def _validate_parameters(self):
        for child in self.rpc_method.getchildren():
            # There cannot be parameters to a close session request
            self.rpc_response.is_error = True
            self.rpc_response.node = ncerror.BadMsg(self.rpc_request)
            return