# Copyright 2019-2024 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/>.

# converts 'set system syslog host <address>:<port>'
# to 'set system syslog host <address> port <port>'

import re

from vyos.configtree import ConfigTree

cbase = ['system', 'syslog', 'host']

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

    for host in config.list_nodes(cbase):
        if re.search(':[0-9]{1,5}$',host):
            h = re.search('^[a-zA-Z\-0-9\.]+', host).group(0)
            p = re.sub(':', '', re.search(':[0-9]+$', host).group(0))
            config.set(cbase + [h])
            config.set(cbase + [h, 'port'], value=p)
            for fac in config.list_nodes(cbase + [host, 'facility']):
                config.set(cbase + [h, 'facility', fac])
                config.set_tag(cbase + [h, 'facility'])
                if config.exists(cbase + [host, 'facility', fac, 'protocol']):
                    proto = config.return_value(cbase + [host, 'facility', fac, 'protocol'])
                    config.set(cbase + [h, 'facility', fac, 'protocol'], value=proto)
                if config.exists(cbase + [host, 'facility', fac, 'level']):
                    lvl = config.return_value(cbase + [host, 'facility', fac, 'level'])
                    config.set(cbase + [h, 'facility', fac, 'level'], value=lvl)
            config.delete(cbase + [host])