#!/usr/bin/env python3
#
# Copyright (C) 2023 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library.  If not, see <http://www.gnu.org/licenses/>.

# T5681: Firewall re-writing. Simplify cli when mathcing interface
# From
#   'set nat66 [source|destination] rule X [inbound-interface|outbound interface] <iface>'
# to
#   'set nat66 [source|destination] rule X [inbound-interface|outbound interface] name <iface>'

from vyos.configtree import ConfigTree

def migrate(config: ConfigTree) -> None:
    if not config.exists(['nat66']):
        # Nothing to do
        return

    for direction in ['source', 'destination']:
        # If a node doesn't exist, we obviously have nothing to do.
        if not config.exists(['nat66', direction]):
            continue

        # However, we also need to handle the case when a 'source' or 'destination' sub-node does exist,
        # but there are no rules under it.
        if not config.list_nodes(['nat66', direction]):
            continue

        for rule in config.list_nodes(['nat66', direction, 'rule']):
            base = ['nat66', direction, 'rule', rule]
            for iface in ['inbound-interface','outbound-interface']:
                if config.exists(base + [iface]):
                    tmp = config.return_value(base + [iface])
                    config.delete(base + [iface])
                    config.set(base + [iface, 'name'], value=tmp)