# Copyright 2020-2024 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/>.

# - Rename SSTP ppp-settings node to ppp-options to make use of a common
#   Jinja Template to render Accel-PPP services

from vyos.configtree import ConfigTree

base_path = ['vpn', 'sstp']

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

    if config.exists(base_path + ['ppp-settings']):
        config.rename(base_path + ['ppp-settings'], 'ppp-options')

    config_ns = base_path + ['network-settings', 'name-server']
    if config.exists(config_ns):
        config.copy(config_ns, base_path + ['name-server'])
        config.delete(config_ns)

    config_mtu = base_path + ['network-settings', 'mtu']
    if config.exists(config_mtu):
        config.copy(config_mtu, base_path + ['mtu'])
        config.delete(config_mtu)

    config_gw = base_path + ['network-settings', 'client-ip-settings', 'gateway-address']
    if config.exists(config_gw):
        config.copy(config_gw, base_path + ['gateway-address'])
        config.delete(config_gw)

    config_client_ip = base_path + ['network-settings', 'client-ip-settings']
    if config.exists(config_client_ip):
        config.copy(config_client_ip, base_path + ['client-ip-pool'])
        config.delete(config_client_ip)

    config_client_ipv6 = base_path + ['network-settings', 'client-ipv6-pool']
    if config.exists(config_client_ipv6):
        config.copy(config_client_ipv6, base_path + ['client-ipv6-pool'])
        config.delete(config_client_ipv6)

    # all nodes now have been migrated out of network-settings - delete node
    config_nw_settings = base_path + ['network-settings']
    if config.exists(config_nw_settings):
        config.delete(config_nw_settings)