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

#
# set and show user-data for a connection:
#
# - Show all user data for all connections:
#   $ ./examples/python/gi/setting-user-data.py
# - Filter to show only connections with matching id or uuid
#   $ ./examples/python/gi/setting-user-data.py id my-connection
#   $ ./examples/python/gi/setting-user-data.py uuid 123e4567-e89b-12d3-a456-426655440000
# - id and uuid can be repeated to select multiple connections
#   $ ./examples/python/gi/setting-user-data.py id my-connection1 id my-other-connection
#
# - Specify the user-data keys you want to see
#   $ ./examples/python/gi/setting-user-data.py id my-connection my.user.field.1
#   $ ./examples/python/gi/setting-user-data.py id my-connection my.user.field.1 my.other.userfield
# - Prefix the field name with ~ to use a regex
#   $ ./examples/python/gi/setting-user-data.py '~^my\.user\.'
#
# - set the fields, you need to select exactly one connection
#   $ ./examples/python/gi/setting-user-data.py set id "$NAME" my.field.1 my-value1
# - delete a user-setting
#   $ ./examples/python/gi/setting-user-data.py set id "$NAME" -d my.field.1
# - set/delete multiple user data values at once
#   $ ./examples/python/gi/setting-user-data.py set id "$NAME" my.field.1 my-value1 -d my.other.field
#
# - libnm already client side rejects invalid values, like
#   $ ./examples/python/gi/setting-user-data.py set id "$NAME" invalid_name 'has-no-dot'
# - to allow client side to specify invalid values and send them to the
#   server, pass --set-gobject
#   $ ./examples/python/gi/setting-user-data.py set id "$NAME" invalid_name 'has-no-dot' --set-gobject
#

import sys
import re

import gi

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


def pr(v):
    import pprint

    pprint.pprint(v, indent=4, depth=5, width=60)


def parse_args():
    args = {"set": False, "set-gobject": False, "filter": [], "data": []}
    i = 1
    while i < len(sys.argv):
        a = sys.argv[i]
        if i == 1:
            if a in ["s", "set"]:
                args["set"] = True
                i += 1
                continue
            elif a in ["g", "get"]:
                args["set"] = False
                i += 1
                continue
        if a in ["id", "uuid"]:
            args["filter"].append((a, sys.argv[i + 1]))
            i += 2
            continue

        if a in ["--set-gobject"]:
            args["set-gobject"] = True
            i += 1
            continue

        if a == "data":
            i += 1
            a = sys.argv[i]
        if args["set"]:
            if a == "-d":
                args["data"].append((sys.argv[i + 1], None))
            else:
                args["data"].append((a, sys.argv[i + 1]))
            i += 2
        else:
            args["data"].append(a)
            i += 1

    return args


def connection_to_str(connection):
    return "%s (%s)" % (connection.get_id(), connection.get_uuid())


def connections_filter(connections, filter_data):
    connections = list(sorted(connections, key=connection_to_str))
    if not filter_data:
        return connections
    # we preserve the order of the selected connections. And
    # if connections are selected multiple times, we return
    # them multiple times.
    l = []
    for f in filter_data:
        if f[0] == "id":
            for c in connections:
                if f[1] == c.get_id():
                    l.append(c)
        else:
            assert f[0] == "uuid"
            for c in connections:
                if f[1] == c.get_uuid():
                    l.append(c)
    return l


def print_user_data(connection, data_allow_regex, data, prefix=""):
    s_u = connection.get_setting(NM.SettingUser)
    n = "none"
    keys_len = 0
    keys = []
    if s_u is not None:
        all_keys = s_u.get_keys()
        keys_len = len(all_keys)
        if data:
            for d in data:
                if data_allow_regex and len(d) > 0 and d[0] == "~":
                    r = re.compile(d[1:])
                    keys.extend([k for k in all_keys if r.match(k)])
                else:
                    keys.append(d)
        else:
            keys.extend(all_keys)
        n = "%s" % (keys_len)

    print("%s%s [%s]" % (prefix, connection_to_str(connection), n))
    dd = {}
    if s_u is not None:
        dd = s_u.get_property(NM.SETTING_USER_DATA)
    for k in keys:
        if s_u is not None:
            v = s_u.get_data(k)
            if v is None:
                if k in dd:
                    print('%s   INVALID:   "%s" = "%s"' % (prefix, k, dd[k]))
                else:
                    print('%s   MISSING:   "%s"' % (prefix, k))
            else:
                assert v == dd.get(k, None)
                print('%s   SET:       "%s" = "%s"' % (prefix, k, v))
        else:
            print('%s   MISSING:  "%s"' % (prefix, k))


def do_get(connections, data):
    first_line = True
    connections = list(connections)
    if not connections:
        print("no matching connections (use id|uuid argument)")
        sys.exit(1)
    for c in connections:
        if first_line:
            first_line = False
        else:
            print("")
        print_user_data(c, True, data)


def do_set(connection, data, set_gobject):
    print_user_data(connection, False, [d[0] for d in data], prefix="BEFORE: ")
    print("")
    s_u = connection.get_setting(NM.SettingUser)
    if s_u is None:
        connection.add_setting(NM.SettingUser())
        s_u = connection.get_setting(NM.SettingUser)
    for d in data:
        key = d[0]
        val = d[1]
        if val is None:
            print(' DEL: "%s"' % (key))
        else:
            print(' SET: "%s" = "%s"' % (key, val))
        if set_gobject:
            d = s_u.get_property(NM.SETTING_USER_DATA)
            if val is None:
                d.pop(key, None)
            else:
                d[key] = val
            s_u.set_property(NM.SETTING_USER_DATA, d)
        else:
            try:
                s_u.set_data(key, val)
            except Exception as e:
                if val is None:
                    print('error deleting key "%s": %s' % (key, e))
                else:
                    print('error setting key "%s" = "%s": %s' % (key, val, e))
                sys.exit(1)

    try:
        connection.commit_changes(True, None)
    except Exception as e:
        print("failure to commit connection: %s" % (e))
        sys.exit(1)

    print("")
    print_user_data(connection, False, [d[0] for d in data], prefix="AFTER:  ")


###############################################################################

if __name__ == "__main__":
    args = parse_args()
    nm_client = NM.Client.new(None)

    connections = connections_filter(nm_client.get_connections(), args["filter"])

    if args["set"]:
        if not args["data"]:
            print("Requires one or more arguments to set or delete")
            sys.exit(1)
        if len(connections) != 1:
            print(
                "To set the user-data of a connection, exactly one connection must be selected via id|uuid. Instead, %s connection matched ([%s])"
                % (
                    len(connections),
                    ", ".join([connection_to_str(c) for c in connections]),
                )
            )
            sys.exit(1)
        do_set(connections[0], args["data"], args["set-gobject"])
    else:
        do_get(connections, args["data"])