# 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/>.

from vyos.configtree import ConfigTree

base = ['high-availability', 'virtual-server']

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

    if config.exists(base):
        for vs in config.list_nodes(base):
            vs_base = base + [vs]

            # If the fwmark is used, the address is not required
            if not config.exists(vs_base + ['fwmark']):
                # add option: 'virtual-server <tag> address x.x.x.x'
                config.set(vs_base + ['address'], value=vs)