# Copyright (C) 2024-2025 VyOS maintainers and contributors
#
# 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
#   set firewall zone <zone> interface RED
#   set firewall zone <zone> interface eth0
# To
#   set firewall zone <zone> member vrf RED
#   set firewall zone <zone> member interface eth0

from vyos.configtree import ConfigTree

base = ['firewall', 'zone']

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

    for zone in config.list_nodes(base):
        zone_iface_base = base + [zone, 'interface']
        zone_member_base = base + [zone, 'member']
        if config.exists(zone_iface_base):
            for iface in config.return_values(zone_iface_base):
                if config.exists(['vrf', 'name', iface]):
                    config.set(zone_member_base + ['vrf'], value=iface, replace=False)
                else:
                    config.set(zone_member_base + ['interface'], value=iface, replace=False)
            config.delete(zone_iface_base)