#!/usr/bin/env python3

import sys
import argparse
import json

parser = argparse.ArgumentParser(description='Parse output from ifstatus and exatract addresses and prefixes')
parser.add_argument('-t', '--tag', help='Prepend interface name to result')
# The "interface" here is the Luci term, i.e. "lan", "wan" etc
# parser.add_argument('interface', nargs='?')

args = parser.parse_args()

try:
    ifstatus_dict = json.load(sys.stdin)
except json.JSONDecodeError as exc:
    print(exc.msg, " at line/column ", lineno, "/", colno) 
    exit(1)

for key in ['ipv4-address', 'ipv6-address', 'ipv6-prefix',
            'ipv6-prefix-assignment']:
    if key in ifstatus_dict:
        ip_dict = ifstatus_dict[key]
#       print(key, ': ', ip_dict)
        if key == 'ipv4-address' or key == 'ipv6-address':
            for item in ip_dict:
#               print(item)
                print(args.tag if args.tag else '', item['address'])
        elif key == 'ipv6-prefix' or key == 'ipv6-prefix-assignment':
            for item in ip_dict:
#               print(item)
                print(args.tag if args.tag else '', item['address'] + '/' + str(item['mask']))
                if 'local-address' in item:
                    print(args.tag if args.tag else '', item['local-address']['address'])