#!/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 [ [id] <id> | [uuid] <uuid> ] \\" % (arg0))
    print(
        "       %s [ --to-disk | --in-memory | --in-memory-detached | --in-memory-only ] \\"
        % (arg0_spaced)
    )
    print("       %s [ --block-autoconnect ] \\" % (arg0_spaced))
    print("       %s [ --volatile ] \\" % (arg0_spaced))
    print("       %s [ --no-reapply ] \\" % (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.SettingsUpdate2Flags.NONE
    arg_volatile = NM.SettingsUpdate2Flags.NONE
    arg_no_reapply = NM.SettingsUpdate2Flags.NONE

    cons = []

    argv = list(sys.argv[1:])
    while argv:
        if argv[0] in ["id", "uuid"]:
            if cons:
                die("cannot specify multiple connections")
            if len(argv) < 2:
                die('missing argument for "%s" specifier' % (argv[0]))
            cons.extend(find_connections(nm_client, argv[0], argv[1]))
            if len(cons) == 0:
                die('could not find connection for "%s %s"' % (argv[0], argv[1]))
            if len(cons) != 1:
                die('could not find unique connection for "%s %s"' % (argv[0], argv[1]))
            argv = argv[2:]
            continue
        if argv[0] in ["--block-autoconnect"]:
            arg_block_autoconnect = NM.SettingsUpdate2Flags.BLOCK_AUTOCONNECT
            argv = argv[1:]
            continue
        if argv[0] in ["--volatile"]:
            arg_volatile = NM.SettingsUpdate2Flags.VOLATILE
            argv = argv[1:]
            continue
        if argv[0] in ["--no-reapply"]:
            arg_no_reapply = NM.SettingsUpdate2Flags.NO_REAPPLY
            argv = argv[1:]
            continue
        if argv[0] in [
            "--to-disk",
            "--in-memory",
            "--in-memory-detached",
            "--in-memory-only",
        ]:
            if argv[0] == "--to-disk":
                v = NM.SettingsUpdate2Flags.TO_DISK
            elif argv[0] == "--in-memory":
                v = NM.SettingsUpdate2Flags.IN_MEMORY
            elif argv[0] == "--in-memory-detached":
                v = NM.SettingsUpdate2Flags.IN_MEMORY_DETACHED
            elif argv[0] == "--in-memory-only":
                v = NM.SettingsUpdate2Flags.IN_MEMORY_ONLY
            elif argv[0] == "--keep":
                v = NM.SettingsUpdate2Flags.NONE
            else:
                assert False
            if arg_mode is not None:
                die('duplicate storage modes ("%s")' % (argv[0]))
            arg_mode = v
            argv = argv[1:]
            continue
        if cons:
            die('unknown argument "%s"' % (argv[0]))
        cons.extend(find_connections(nm_client, None, argv[0]))
        if len(cons) == 0:
            die('could not find connection for "%s"' % (argv[0]))
        if len(cons) != 1:
            die('could not find unique connection for "%s"' % (argv[0]))
        argv = argv[1:]
        continue

    if len(cons) != 1:
        die("missing connection argument", True)

    con = cons[0]

    con2 = NM.SimpleConnection.new_clone(con)

    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),
        (arg_mode if arg_mode is not None else NM.SettingsUpdate2Flags.NONE)
        | arg_block_autoconnect
        | arg_volatile
        | arg_no_reapply,
        None,
        None,
        _update2_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"
        % (con_to_str(con2), " ".join(sys.argv), result["result"])
    )


if __name__ == "__main__":
    main()