# Copyright 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/>.

# Changed value of dead-peer-detection.action from hold to trap
# Changed value of close-action from hold to trap and from restart to start

from vyos.configtree import ConfigTree

base = ['vpn', 'ipsec', 'ike-group']

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

    for ike_group in config.list_nodes(base):
        base_dpd_action = base + [ike_group, 'dead-peer-detection', 'action']
        base_close_action = base + [ike_group, 'close-action']
        if config.exists(base_dpd_action) and config.return_value(base_dpd_action) == 'hold':
            config.set(base_dpd_action, 'trap', replace=True)
        if config.exists(base_close_action):
            if config.return_value(base_close_action) == 'hold':
                config.set(base_close_action, 'trap', replace=True)
            if config.return_value(base_close_action) == 'restart':
                config.set(base_close_action, 'start', replace=True)