#!/usr/bin/python
#
# Copyright 2016 Canonical Ltd
#
# 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.

import sys

sys.path.append('hooks/')

from charmhelpers.contrib.openstack.utils import (
    do_action_openstack_upgrade,
)

from charmhelpers.core.hookenv import (
    relation_ids,
)

from nova_cc_utils import (
    do_openstack_upgrade,
)

from nova_cc_hooks import (
    config_changed,
    CONFIGS,
    neutron_api_relation_joined,
    db_joined,
)


def openstack_upgrade():
    """Upgrade packages to config-set Openstack version.

    If the charm was installed from source we cannot upgrade it.
    For backwards compatibility a config flag must be set for this
    code to run, otherwise a full service level upgrade will fire
    on config-changed."""

    if (do_action_openstack_upgrade('nova-common',
                                    do_openstack_upgrade,
                                    CONFIGS)):
        [neutron_api_relation_joined(rid=rid, remote_restart=True)
            for rid in relation_ids('neutron-api')]
        # NOTE(thedac): Force re-fire of shared-db joined hook
        # to ensure that nova_api database is setup if required.
        [db_joined(relation_id=r_id)
            for r_id in relation_ids('shared-db')]
        config_changed()

if __name__ == '__main__':
    openstack_upgrade()