# 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/>.

# T5154: allow only one ip address per family for parameter 'listen-address'
# Allow only one interface for parameter 'interface'
# If more than one are specified, remove such entries

from vyos.configtree import ConfigTree
from vyos.template import is_ipv4
from vyos.template import is_ipv6

base_path = ['service', 'ntp']

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

    if config.exists(base_path + ['listen-address']) and (len([addr for addr in config.return_values(base_path + ['listen-address']) if is_ipv4(addr)]) > 1):
        for addr in config.return_values(base_path + ['listen-address']):
            if is_ipv4(addr):
                config.delete_value(base_path + ['listen-address'], addr)

    if config.exists(base_path + ['listen-address']) and (len([addr for addr in config.return_values(base_path + ['listen-address']) if is_ipv6(addr)]) > 1):
        for addr in config.return_values(base_path + ['listen-address']):
            if is_ipv6(addr):
                config.delete_value(base_path + ['listen-address'], addr)

    if config.exists(base_path + ['interface']):
        if len(config.return_values(base_path + ['interface'])) > 1:
            config.delete(base_path + ['interface'])