#!/usr/bin/env python3
#
# Copyright (C) 2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# * remove "system login user <user> group" node, Why should be add a user to a
#   3rd party group when the system is fully managed by CLI?
# * remove "system login user <user> level" node
#   This is the only privilege level left and also the default, what is the
#   sense in keeping this orphaned node?

import os
import sys

from vyos.configtree import ConfigTree

if len(sys.argv) < 2:
    print("Must specify file name!")
    sys.exit(1)

file_name = sys.argv[1]

with open(file_name, 'r') as f:
    config_file = f.read()

config = ConfigTree(config_file)
base = ['system', 'login', 'user']
if not config.exists(base):
    # Nothing to do
    sys.exit(0)
else:
    for user in config.list_nodes(base):
        if config.exists(base + [user, 'group']):
            config.delete(base + [user, 'group'])

        if config.exists(base + [user, 'level']):
            config.delete(base + [user, 'level'])

    try:
        with open(file_name, 'w') as f:
            f.write(config.to_string())
    except OSError as e:
        print("Failed to save the modified config: {}".format(e))
        sys.exit(1)