#!/usr/bin/env python
#
# 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.

"""
This Launchpad tool is used to reset <release>-backport-potential tags once
backports are merged.
"""

import argparse

from launchpadlib.launchpad import Launchpad


RELEASES = ('liberty', 'mitaka')


def _parse_args():
    parser = argparse.ArgumentParser(
        description='Reset -backport-potential tags for closed bugs.')
    parser.add_argument(
        'projects', metavar='N', type=str, nargs='+',
        help='Launchpad project names')
    return parser.parse_args()


def _cleanup_project(lp, project):
    print('Processing project %s...' % project)
    for release in RELEASES:
        in_tag = 'in-stable-%s' % release
        potential_tag = '%s-backport-potential' % release

        for task in lp.projects[project].searchTasks(tags=[potential_tag]):
            bug = task.bug
            tags = bug.tags

            if in_tag in tags:
                print("Removing %s tag for %s" % (potential_tag, bug))
                tags.remove(potential_tag)
                bug.tags = tags
                bug.lp_save()


def main():
    args = _parse_args()

    lp = Launchpad.login_with('openstack-releasing', 'production')

    for project in args.projects:
        _cleanup_project(lp, project)


if __name__ == '__main__':
    main()