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# 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/>.

# Change from 'ccp' to 'disable-ccp' in ppp-option section
# Migration ipv6 options

from vyos.configtree import ConfigTree

base = ['service', 'pppoe-server']

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

    #CCP migration
    if config.exists(base + ['ppp-options', 'ccp']):
        config.delete(base + ['ppp-options', 'ccp'])
    else:
        config.set(base + ['ppp-options', 'disable-ccp'])

    #IPV6 options migrations
    if config.exists(base + ['ppp-options','ipv6-peer-intf-id']):
        intf_peer_id = config.return_value(base + ['ppp-options','ipv6-peer-intf-id'])
        if intf_peer_id == 'ipv4':
            intf_peer_id = 'ipv4-addr'
        config.set(base + ['ppp-options','ipv6-peer-interface-id'], value=intf_peer_id, replace=True)
        config.delete(base + ['ppp-options','ipv6-peer-intf-id'])

    if config.exists(base + ['ppp-options','ipv6-intf-id']):
        intf_id = config.return_value(base + ['ppp-options','ipv6-intf-id'])
        config.set(base + ['ppp-options','ipv6-interface-id'], value=intf_id, replace=True)
        config.delete(base + ['ppp-options','ipv6-intf-id'])

    if config.exists(base + ['ppp-options','ipv6-accept-peer-intf-id']):
        config.set(base + ['ppp-options','ipv6-accept-peer-interface-id'])
        config.delete(base + ['ppp-options','ipv6-accept-peer-intf-id'])