#!/usr/bin/env python

# SPDX-License-Identifier: GPL-2.0-or-later

#

# Copyright (C) 2019 Red Hat, Inc.

#

import sys

import gi

gi.require_version("NM", "1.0")

from gi.repository import GLib, NM

def find_connections(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:

            yield c

        if arg_type in [None, "uuid"] and c.get_uuid() == arg_id:

            yield c

def find_connection_first(nm_client, arg_type, arg_id):

    for f in find_connections(nm_client, arg_type, arg_id):

        return f

def con_to_str(con):

    s_con = con.get_setting_connection()

    return '"%s" (%s)' % (s_con.get_id(), s_con.get_uuid())

def usage():

    arg0 = sys.argv[0]

    arg0_spaced = " " * len(arg0)

    print("Usage: %s [ --clone ( [id] <id> | [uuid] <uuid> ) ] \\" % (arg0))

    print("       %s [ --to-disk | --in-memory ] \\" % (arg0_spaced))

    print("       %s [ --block-autoconnect ] \\" % (arg0_spaced))

    print("       %s [ --id <new-id> ] \\" % (arg0_spaced))

    print("       %s [ --uuid <new-uuid> ] \\" % (arg0_spaced))

    return 1

def die(msg, print_usage=False):

    print(msg)

    if print_usage:

        usage()

    sys.exit(1)

def main():

    main_loop = GLib.MainLoop()

    nm_client = NM.Client.new(None)

    arg_mode = None

    arg_block_autoconnect = NM.SettingsAddConnection2Flags.NONE

    arg_id = None

    arg_uuid = None

    cons = []

    argv = list(sys.argv[1:])

    while argv:

        if argv[0] == "--clone":

            match_type = None

            if len(argv) < 2:

                die("missing argument for --clone option")

            if argv[0] in ["id", "uuid"]:

                match_type = argv[0]

                if len(argv) < 3:

                    die('missing argument for "--clone %s" option' % (match_type))

                argv = argv[1:]

            if cons:

                die("cannot specify --clone argument more than once")

            cons.extend(find_connections(nm_client, match_type, argv[1]))

            if len(cons) == 0:

                die(

                    'could not find connection for "--clone %s%s"'

                    % ((match_type or ""), argv[1])

                )

            if len(cons) != 1:

                die(

                    'could not find unique connection for "--clone %s%s"'

                    % ((match_type or ""), argv[1])

                )

            argv = argv[2:]

            continue

        if argv[0] in ["--block-autoconnect"]:

            arg_block_autoconnect = NM.SettingsAddConnection2Flags.BLOCK_AUTOCONNECT

            argv = argv[1:]

            continue

        if argv[0] in ["--to-disk", "--in-memory"]:

            if argv[0] == "--to-disk":

                v = NM.SettingsAddConnection2Flags.TO_DISK

            elif argv[0] == "--in-memory":

                v = NM.SettingsAddConnection2Flags.IN_MEMORY

            else:

                assert False

            if arg_mode is not None:

                die('duplicate storage modes ("%s")' % (argv[0]))

            arg_mode = v

            argv = argv[1:]

            continue

        if argv[0] in ["--id"]:

            if len(argv) < 2:

                die("missing argument for --id option")

            arg_id = argv[1]

            argv = argv[2:]

            continue

        if argv[0] in ["--uuid"]:

            if len(argv) < 2:

                die("missing argument for --uuid option")

            arg_uuid = argv[1]

            argv = argv[2:]

            continue

        die('unknown argument "%s"' % (argv[0]))

    if len(cons) != 1:

        die("missing --clone argument", True)

    con = cons[0]

    con2 = NM.SimpleConnection.new_clone(con)

    s_con = con2.get_setting_connection()

    if arg_id:

        s_con.set_property(NM.SETTING_CONNECTION_ID, arg_id)

    s_con.set_property(NM.SETTING_CONNECTION_UUID, arg_uuid or NM.utils_uuid_generate())

    result = {}

    def _add_connection2_cb(cl, async_result, user_data):

        try:

            c, r = nm_client.add_connection2_finish(async_result)

        except Exception as e:

            result["error"] = e

        else:

            result["result"] = r

            result["connection"] = c

        main_loop.quit()

    nm_client.add_connection2(

        con2.to_dbus(NM.ConnectionSerializationFlags.ALL),

        (arg_mode if arg_mode is not None else NM.SettingsAddConnection2Flags.TO_DISK)

        | arg_block_autoconnect,

        None,

        False,

        None,

        _add_connection2_cb,

        None,

    )

    main_loop.run()

    if "error" in result:

        die(

            "update connection %s failed [%s]: %s"

            % (con_to_str(con2), " ".join(sys.argv), result["error"])

        )

    print(

        "update connection %s succeeded [%s]: %s, %s"

        % (

            con_to_str(con2),

            " ".join(sys.argv),

            result["connection"].get_path(),

            result["result"],

        )

    )

if __name__ == "__main__":

    main()