#!/usr/bin/env python3
#
# Copyright (C) 2018 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 sys
import os
import time

from vyos.config import Config
from vyos.util import ConfigError

config_file = r'/etc/ssh/sshd_config'

def get_config():
    ssh = {}
    conf = Config()
    conf.set_level('service ssh')
    if not conf.exists(''):
        return ssh

    return ssh

def verify(ssh):
    return None

def generate(ssh):
    config_header = '### Autogenerated by vyos-config-ssh.py on {tm} ###\n'.format(tm=time.strftime("%a, %d %b %Y %H:%M:%S", time.localtime()))

    # write new configuration file
    f = open(config_file, 'w')
    f.write(config_header)
    f.write('\n')
    f.close()
    return None

def apply(ssh):
    if len(ssh) == 0:
        cmd = "sudo systemctl stop ssh"
    else:
        cmd = "sudo systemctl start ssh"

    os.system(cmd)
    return None

if __name__ == '__main__':
    try:
        c = get_config()
        verify(c)
        generate(c)
        apply(c)
    except ConfigError as e:
        print(e)
        sys.exit(1)