# Copyright 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/>.

# T6981:
# - remove "service dns dynamic name <service> protocol googledomains"
# - remove "service dns dynamic name <service> protocol woima"
# - remove "service dns dynamic name <service> address web url ..."
#     when url is https://domains.google.com/*

import re
from vyos.base import Warning
from vyos.configtree import ConfigTree

base_path = ['service', 'dns', 'dynamic', 'name']

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

    for service in config.list_nodes(base_path):

        service_path = base_path + [service]

        # Remove configurations using protocol 'googledomains' and 'woima'
        if config.exists(service_path + ['protocol']):
            protocol = config.return_value(service_path + ['protocol'])
            if protocol in ['googledomains', 'woima']:
                Warning(f'Removing {service} using protocol "{protocol}" because the service has been shutdown')
                config.delete(service_path)

        # Look for 'address web' with 'url' set to 'googledomains' or 'https://domains.google.com'
        # and remove them so that ddclient defaults apply for 'address web'
        if config.exists(service_path + ['address', 'web']):
            web_addr_path = service_path + ['address', 'web']
            if config.exists(web_addr_path + ['url']):
                url = config.return_value(web_addr_path + ['url'])
                if url == 'googledomains' or re.search(r'^(https?://)?domains\.google\.com', url):
                    config.delete(web_addr_path + ['url'])
                    if config.exists(web_addr_path + ['skip']):
                        config.delete(web_addr_path + ['skip'])