# Copyright 2022-2024 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/>.

# re-organize route-map as-path

from vyos.configtree import ConfigTree

base = ['policy', 'route-map']

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

    for route_map in config.list_nodes(base):
        # Bail out Early
        if not config.exists(base + [route_map, 'rule']):
            continue

        for rule in config.list_nodes(base + [route_map, 'rule']):
            rule_base = base + [route_map, 'rule', rule]
            if config.exists(rule_base + ['set', 'as-path-exclude']):
                tmp = config.return_value(rule_base + ['set', 'as-path-exclude'])
                config.delete(rule_base + ['set', 'as-path-exclude'])
                config.set(rule_base + ['set', 'as-path', 'exclude'], value=tmp)

            if config.exists(rule_base + ['set', 'as-path-prepend']):
                tmp = config.return_value(rule_base + ['set', 'as-path-prepend'])
                config.delete(rule_base + ['set', 'as-path-prepend'])
                config.set(rule_base + ['set', 'as-path', 'prepend'], value=tmp)