# 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/>.

# T2898: add ndp-proxy service

from vyos.configtree import ConfigTree

base = ['nat66', 'source']
new_base = ['service', 'ndp-proxy', 'interface']

def migrate(config: ConfigTree) -> None:
    if not config.exists(base):
        # Nothing to do
        return

    for rule in config.list_nodes(base + ['rule']):
        base_rule = base + ['rule', rule]

        interface = None
        if config.exists(base_rule + ['outbound-interface', 'name']):
            interface = config.return_value(base_rule + ['outbound-interface', 'name'])
        else:
            continue

        prefix_base = base_rule + ['source', 'prefix']
        if config.exists(prefix_base):
            prefix = config.return_value(prefix_base)
            config.set(new_base + [interface, 'prefix', prefix, 'mode'], value='static')
            config.set_tag(new_base)
            config.set_tag(new_base + [interface, 'prefix'])

            if config.exists(base_rule + ['disable']):
                config.set(new_base + [interface, 'prefix', prefix, 'disable'])