#!/usr/bin/env python3
#
# Copyright (C) 2019-2021 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/>.

import os
import sys
import argparse

from vyos.config import Config
from vyos.util import dict_search

def get_user_from_interface(interface):
    config = Config()
    base = ['interfaces', 'openvpn', interface]
    openvpn = config.get_config_dict(base, effective=True, key_mangling=('-', '_'))
    users = []

    try:
        for user in (dict_search('server.client', openvpn[interface]) or []):
            users.append(user.split(',')[0])
    except:
        pass

    return users

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("-i", "--interface", type=str, help="List users per interface")
    args = parser.parse_args()

    users = []

    users = get_user_from_interface(args.interface)

    print(" ".join(users))