# 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.
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# T6953: merge node and frr exporter under prometheus section

from vyos.configtree import ConfigTree

old_base = ['service', 'monitoring']
new_base = ['service', 'monitoring', 'prometheus']

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

    if config.exists(old_base + ['node-exporter']):
        if config.exists(old_base + ['node-exporter', 'listen-address']):
          tmp = config.return_value(old_base + ['node-exporter', 'listen-address'])
          config.set(new_base + ['node-exporter', 'listen-address'], value=tmp)
        if config.exists(old_base + ['node-exporter', 'port']):
          tmp = config.return_value(old_base + ['node-exporter', 'port'])
          config.set(new_base + ['node-exporter', 'port'], value=tmp)
        if config.exists(old_base + ['node-exporter', 'vrf']):
          tmp = config.return_value(old_base + ['node-exporter', 'vrf'])
          config.set(new_base + ['node-exporter', 'vrf'], value=tmp)
        config.delete(old_base + ['node-exporter'])

    if config.exists(old_base + ['frr-exporter']):
        if config.exists(old_base + ['frr-exporter', 'listen-address']):
          tmp = config.return_value(old_base + ['frr-exporter', 'listen-address'])
          config.set(new_base + ['frr-exporter', 'listen-address'], value=tmp)
        if config.exists(old_base + ['frr-exporter', 'port']):
          tmp = config.return_value(old_base + ['frr-exporter', 'port'])
          config.set(new_base + ['frr-exporter', 'port'], value=tmp)
        if config.exists(old_base + ['frr-exporter', 'vrf']):
          tmp = config.return_value(old_base + ['frr-exporter', 'vrf'])
          config.set(new_base + ['frr-exporter', 'vrf'], value=tmp)
        config.delete(old_base + ['frr-exporter'])