# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
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# 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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# T5165: Migrate policy local-route rule <tag> destination|source

from vyos.configtree import ConfigTree

base4 = ['policy', 'local-route']
base6 = ['policy', 'local-route6']

def migrate(config: ConfigTree) -> None:
    if not config.exists(base4) and not config.exists(base6):
        # Nothing to do
        return

    # replace 'policy local-route{v6} rule <tag> destination|source <x.x.x.x>'
    #      => 'policy local-route{v6} rule <tag> destination|source address <x.x.x.x>'
    for base in [base4, base6]:
        if config.exists(base + ['rule']):
            for rule in config.list_nodes(base + ['rule']):
                dst_path = base + ['rule', rule, 'destination']
                src_path = base + ['rule', rule, 'source']
                # Destination
                if config.exists(dst_path):
                    for dst_addr in config.return_values(dst_path):
                        config.set(dst_path + ['address'], value=dst_addr, replace=False)
                # Source
                if config.exists(src_path):
                    for src_addr in config.return_values(src_path):
                        config.set(src_path + ['address'], value=src_addr, replace=False)