# Copyright 2024 Red Hat, Inc.
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#
#    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 oslo_log import log
from tempest import config
from tempest.lib import decorators

from whitebox_neutron_tempest_plugin.tests.scenario import base as wb_base

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


class OvnDbsMonitoringTest(wb_base.BaseTempestTestCaseOvn):
    credentials = ['primary', 'admin']

    def start_monitoring(self):
        self.monitoring_file = self.master_node_client.exec_command(
            'mktemp').rstrip()
        self.process = self.master_node_client.open_session()
        cmd = '{} OVN_Southbound Chassis external_ids > {}'.format(
            self.sbmonitorcmd, self.monitoring_file)
        LOG.debug('Executing command: %s', cmd)
        self.process.exec_command(cmd)
        self.addCleanup(self.stop_process)

    def stop_process(self):
        if self.process:
            self.process.close()
            self.process = None

    def check_monitoring(self):
        output = self.master_node_client.exec_command(
            'sudo cat ' + self.monitoring_file).splitlines()
        self.assertEqual(1, len(output))

    @decorators.idempotent_id('e0c93863-a4a7-4b16-8f45-793965658cbd')
    def test_create_server_ovn_dbs_monitoring(self):
        """Check no changes are performed on the external_ids value from the
        Chassis table on the OVN SBDB due to the creation of a network, a
        subnet and a VM instance
        This test covers the watchlist bug rhbz#1962178
        Scenario:
        1. The monitoring of the external_ids value from the SBDB Chassis table
           is activated
        2. A network, a subnet and a VM instance are created
        3. The moniroting initiated at 1 is stopped and the result is
           validated: no changes are expected, which means only one row has
           been printed during the test
        """
        self.start_monitoring()
        network = self.create_network()
        self.create_subnet(network=network)
        keypair = self.create_keypair()
        server_kwargs = {
            'flavor_ref': CONF.compute.flavor_ref,
            'image_ref': CONF.compute.image_ref,
            'key_name': keypair['name'],
            'networks': [{'uuid': network['id']}]
        }
        self.create_server(**server_kwargs)
        self.stop_process()
        self.check_monitoring()