# Copyright 202-2024 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 server block directives under 'virtual-host' tag node, instead of
#   relying on 'listen-address' tag node

from vyos.configtree import ConfigTree

old_base = ['service', 'https', 'listen-address']

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

    new_base = ['service', 'https', 'virtual-host']
    config.set(new_base)
    config.set_tag(new_base)

    index = 0
    for addr in config.list_nodes(old_base):
        tag_name = f'vhost{index}'
        config.set(new_base + [tag_name])
        config.set(new_base + [tag_name, 'listen-address'], value=addr)

        if config.exists(old_base + [addr, 'listen-port']):
            port = config.return_value(old_base + [addr, 'listen-port'])
            config.set(new_base + [tag_name, 'listen-port'], value=port)

        if config.exists(old_base + [addr, 'server-name']):
            names = config.return_values(old_base + [addr, 'server-name'])
            for name in names:
                config.set(new_base + [tag_name, 'server-name'], value=name,
                           replace=False)

        index += 1

    config.delete(old_base)