#!/usr/bin/env python3
#
# Copyright (C) 2021-2023 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/>.
#
# Deletes Wireguard peers if they have the same public key as the router has.

import json
from sys import argv
from sys import exit
from vyos.configtree import ConfigTree
from vyos.ifconfig import EthernetIf
from vyos.ifconfig import BondIf
from vyos.utils.dict import dict_to_paths_values

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

file_name = argv[1]
with open(file_name, 'r') as f:
    config_file = f.read()
    base = ['interfaces', 'bonding']

config = ConfigTree(config_file)
if not config.exists(base):
    # Nothing to do
    exit(0)
for bond in config.list_nodes(base):
    member_base = base + [bond, 'member', 'interface']
    if config.exists(member_base):
        for interface in config.return_values(member_base):
            if_base = ['interfaces', 'ethernet', interface]
            if config.exists(if_base):
                config_ethernet = json.loads(config.get_subtree(if_base).to_json())
                eth_dict_paths = dict_to_paths_values(config_ethernet)
                for option_path, option_value in eth_dict_paths.items():
                    # If option is allowed for changing then continue
                    converted_path = option_path.replace('-','_')
                    if converted_path in EthernetIf.get_bond_member_allowed_options():
                        continue
                    # if option is inherited from bond then continue
                    if converted_path in BondIf.get_inherit_bond_options():
                        continue
                    option_path_list = option_path.split('.')
                    config.delete(if_base + option_path_list)
                    del option_path_list[-1]
                    # delete empty node from config
                    while len(option_path_list) > 0:
                        if config.list_nodes(if_base + option_path_list):
                            break
                        config.delete(if_base + option_path_list)
                        del option_path_list[-1]

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