# Copyright 2018-2024 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.
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# along with this library.  If not, see <http://www.gnu.org/licenses/>.

# Unclutter PPTP VPN configuiration - move radius-server top level tag
# nodes to a regular node which now also configures the radius source address
# used when querying a radius server

from vyos.configtree import ConfigTree

cfg_base = ['vpn', 'pptp', 'remote-access', 'authentication']

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

    # Migrate "vpn pptp authentication radius-source-address" to new
    # "vpn pptp authentication radius source-address"
    if config.exists(cfg_base + ['radius-source-address']):
        address = config.return_value(cfg_base + ['radius-source-address'])
        # delete old configuration node
        config.delete(cfg_base + ['radius-source-address'])
        # write new configuration node
        config.set(cfg_base + ['radius', 'source-address'], value=address)

    # Migrate "vpn pptp authentication radius-server" tag node to new
    # "vpn pptp authentication radius server" tag node
    for server in config.list_nodes(cfg_base + ['radius-server']):
        base_server = cfg_base + ['radius-server', server]
        key = config.return_value(base_server + ['key'])

        # delete old configuration node
        config.delete(base_server)
        # write new configuration node
        config.set(cfg_base + ['radius', 'server', server, 'key'], value=key)

        # format as tag node
        config.set_tag(cfg_base + ['radius', 'server'])

    # delete top level tag node
    if config.exists(cfg_base + ['radius-server']):
        config.delete(cfg_base + ['radius-server'])