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# 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/>.

# - move all pool to named pools
#       'subnet' migrate to namedpool 'default-subnet-pool'
#       'default-subnet-pool' is the next pool for 'default-range-pool'

from vyos.configtree import ConfigTree

base = ['vpn', 'sstp']
pool_base = base + ['client-ip-pool']

def migrate(config: ConfigTree) -> None:
    if not config.exists(base):
        return

    if not config.exists(pool_base):
        return

    range_pool_name = 'default-range-pool'

    if config.exists(pool_base + ['subnet']):
        default_pool = range_pool_name
        for subnet in config.return_values(pool_base + ['subnet']):
            config.set(pool_base + [range_pool_name, 'range'], value=subnet, replace=False)
        config.delete(pool_base + ['subnet'])
        config.set(base + ['default-pool'], value=default_pool)
    # format as tag node
    config.set_tag(pool_base)