#!/usr/bin/env python3
#
# Copyright (C) 2023 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# T5736: igmp: migrate "protocols igmp" to "protocols pim"

import sys
from vyos.configtree import ConfigTree

if len(sys.argv) < 2:
    print("Must specify file name!")
    sys.exit(1)

file_name = sys.argv[1]

with open(file_name, 'r') as f:
    config_file = f.read()

config = ConfigTree(config_file)

base = ['protocols', 'igmp']
pim_base = ['protocols', 'pim']
if not config.exists(base):
    # Nothing to do
    sys.exit(0)

for interface in config.list_nodes(base + ['interface']):
    base_igmp_iface = base + ['interface', interface]
    pim_base_iface = pim_base + ['interface', interface]

    # Create IGMP note under PIM interface
    if not config.exists(pim_base_iface + ['igmp']):
        config.set(pim_base_iface + ['igmp'])

    if config.exists(base_igmp_iface + ['join']):
        config.copy(base_igmp_iface + ['join'], pim_base_iface + ['igmp', 'join'])
        config.set_tag(pim_base_iface + ['igmp', 'join'])

        new_join_base = pim_base_iface + ['igmp', 'join']
        for address in config.list_nodes(new_join_base):
            if config.exists(new_join_base + [address, 'source']):
                config.rename(new_join_base + [address, 'source'], 'source-address')

    if config.exists(base_igmp_iface + ['query-interval']):
        config.copy(base_igmp_iface + ['query-interval'], pim_base_iface + ['igmp', 'query-interval'])

    if config.exists(base_igmp_iface + ['query-max-response-time']):
        config.copy(base_igmp_iface + ['query-max-response-time'], pim_base_iface + ['igmp', 'query-max-response-time'])

    if config.exists(base_igmp_iface + ['version']):
        config.copy(base_igmp_iface + ['version'], pim_base_iface + ['igmp', 'version'])

config.delete(base)

try:
    with open(file_name, 'w') as f:
        f.write(config.to_string())
except OSError as e:
    print("Failed to save the modified config: {}".format(e))
    sys.exit(1)