# Copyright 202-2024 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/>.

# combine both sip-server-address and sip-server-name nodes to common sip-server

from vyos.configtree import ConfigTree

base = ['service', 'dhcpv6-server', 'shared-network-name']

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

    # we need to run this for every configured network
    for network in config.list_nodes(base):
        for subnet in config.list_nodes(base + [network, 'subnet']):
            sip_server = []

            # Do we have 'sip-server-address' configured?
            if config.exists(base + [network, 'subnet', subnet, 'sip-server-address']):
                sip_server += config.return_values(base + [network, 'subnet', subnet, 'sip-server-address'])
                config.delete(base + [network, 'subnet', subnet, 'sip-server-address'])

            # Do we have 'sip-server-name' configured?
            if config.exists(base + [network, 'subnet', subnet, 'sip-server-name']):
                sip_server += config.return_values(base + [network, 'subnet', subnet, 'sip-server-name'])
                config.delete(base + [network, 'subnet', subnet, 'sip-server-name'])

            # Write new CLI value for sip-server
            for server in sip_server:
                config.set(base + [network, 'subnet', subnet, 'sip-server'], value=server, replace=False)