#!/usr/bin/python3
# -*- mode: python -*-
#
# This file is part of Plinth.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
"""
Configuration helper for Syncthing.
"""

import argparse
import subprocess

from plinth import action_utils


def parse_arguments():
    """Return parsed command line arguments as dictionary."""
    parser = argparse.ArgumentParser()
    subparsers = parser.add_subparsers(dest='subcommand', help='Sub command')

    subparsers.add_parser('pre-setup', help='Perform pre-setup operations')
    subparsers.add_parser('setup', help='Setup Syncthing configuration')
    subparsers.add_parser('enable', help='Enable Syncthing site')
    subparsers.add_parser('disable', help='Disable Syncthing site')

    return parser.parse_args()


def subcommand_setup(_):
    """Setup Syncthing configuration."""
    subprocess.check_call(
        ['cp', '/lib/systemd/system/syncthing@.service', '/etc/systemd'])
    service_enable()
    action_utils.webserver_enable('syncthing-plinth')


def service_enable():
    """Start the Syncthing service as plinth user"""
    subprocess.check_call(['systemctl', 'start', 'syncthing@plinth.service'])


def service_disable():
    """Stop the Syncthing service as plinth user"""
    subprocess.check_call(['systemctl', 'stop', 'syncthing@plinth.service'])


def subcommand_enable(_):
    """Enable web configuration and reload."""
    service_enable()
    action_utils.webserver_enable('syncthing-plinth')


def subcommand_disable(_):
    """Disable web configuration and reload."""
    action_utils.webserver_disable('syncthing-plinth')
    service_disable()


def main():
    """Parse arguments and perform all duties."""
    arguments = parse_arguments()

    subcommand = arguments.subcommand.replace('-', '_')
    subcommand_method = globals()['subcommand_' + subcommand]
    subcommand_method(arguments)


if __name__ == '__main__':
    main()