#!/usr/bin/env python
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright (C) 2017 Red Hat, Inc.
#

#
# This example updates a connection's stable-id by appending -#number.

import sys
import re

import gi

gi.require_version("NM", "1.0")
from gi.repository import GLib, NM


def usage():
    print("Usage: %s [[id] <id>]" % (sys.argv[0]))
    print("       %s [[uuid] <uuid>]" % (sys.argv[0]))
    return 1


def find_connection(nm_client, arg_type, arg_id):
    for c in nm_client.get_connections():
        if arg_type in [None, "id"] and c.get_id() == arg_id:
            return c
        if arg_type in [None, "uuid"] and c.get_uuid() == arg_id:
            return c


def main():
    if len(sys.argv) < 2 or len(sys.argv) > 3:
        return usage()
    if len(sys.argv) == 3:
        arg_type = sys.argv[1]
        arg_id = sys.argv[2]
        if arg_type not in ["id", "uuid"]:
            return usage()
    else:
        arg_type = None
        arg_id = sys.argv[1]
    arg_log = '%s"%s"' % ((" with %s " % (arg_type)) if arg_type else "", arg_id)

    main_loop = GLib.MainLoop()

    nm_client = NM.Client.new(None)

    con = find_connection(nm_client, arg_type, arg_id)
    if con is None:
        print("could not find a connection %s" % (arg_log))
        return 1

    s_con = con.get_setting_connection()
    if s_con is None:
        print("connection %s has no [connection] setting" % (arg_log))
        return 1

    arg_log = '"%s" (%s)' % (s_con.get_id(), s_con.get_uuid())

    stable_id = s_con.get_stable_id()
    if not stable_id:
        print("connection %s has no stable-id set" % (arg_log))
        return 1

    re_match = re.search("\A(.*)-([0-9]+)\Z", stable_id)
    if not re_match:
        stable_id = stable_id + "-1"
    else:
        stable_id = re_match.group(1) + "-" + str(int(re_match.group(2)) + 1)

    con2 = NM.SimpleConnection.new_clone(con)
    s_con = con2.get_setting_connection()
    s_con.set_property(NM.SETTING_CONNECTION_STABLE_ID, stable_id)

    result = {}

    def _update2_cb(con, async_result, user_data):
        try:
            r = con.update2_finish(async_result)
        except Exception as e:
            result["error"] = e
        else:
            result["result"] = r
        main_loop.quit()

    con.update2(
        con2.to_dbus(NM.ConnectionSerializationFlags.ALL),
        NM.SettingsUpdate2Flags.BLOCK_AUTOCONNECT,
        None,
        None,
        _update2_cb,
        None,
    )

    main_loop.run()

    if "error" in result:
        print("update connection %s failed: %s" % (arg_log, result["error"]))
        return 1

    print("update connection %s succeeded: %s" % (arg_log, result["result"]))
    print('set stable-id to "%s"' % (stable_id))
    return 0


if __name__ == "__main__":
    sys.exit(main())