# Copyright 2023-2024 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.
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# Lesser General Public License for more details.
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# T5681: Firewall re-writing. Simplify cli when mathcing interface
# From
    # set firewall ... rule <rule> [inbound-interface | outboubd-interface] interface-name <iface>
    # set firewall ... rule <rule> [inbound-interface | outboubd-interface] interface-group <iface_group>
# To
    # set firewall ... rule <rule> [inbound-interface | outboubd-interface] name <iface>
    # set firewall ... rule <rule> [inbound-interface | outboubd-interface] group <iface_group>

from vyos.configtree import ConfigTree

base = ['firewall']

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

    ## Migration from base chains
    #if config.exists(base + ['interface', iface, direction]):
    for family in ['ipv4', 'ipv6']:
        if config.exists(base + [family]):
            for hook in ['forward', 'input', 'output', 'name']:
                if config.exists(base + [family, hook]):
                    for priority in config.list_nodes(base + [family, hook]):
                        if config.exists(base + [family, hook, priority, 'rule']):
                            for rule in config.list_nodes(base + [family, hook, priority, 'rule']):
                                for direction in ['inbound-interface', 'outbound-interface']:
                                    if config.exists(base + [family, hook, priority, 'rule', rule, direction]):
                                        if config.exists(base + [family, hook, priority, 'rule', rule, direction, 'interface-name']):
                                            iface = config.return_value(base + [family, hook, priority, 'rule', rule, direction, 'interface-name'])
                                            config.set(base + [family, hook, priority, 'rule', rule, direction, 'name'], value=iface)
                                            config.delete(base + [family, hook, priority, 'rule', rule, direction, 'interface-name'])
                                        elif config.exists(base + [family, hook, priority, 'rule', rule, direction, 'interface-group']):
                                            group = config.return_value(base + [family, hook, priority, 'rule', rule, direction, 'interface-group'])
                                            config.set(base + [family, hook, priority, 'rule', rule, direction, 'group'], value=group)
                                            config.delete(base + [family, hook, priority, 'rule', rule, direction, 'interface-group'])