#! /usr/bin/env python3

import sys
from m_lib.defenc import default_encoding

l = len(sys.argv)

if (l == 2) and (sys.argv[1] != '-r'):
    reverse = False
    address = sys.argv[1]
elif (l == 3) and (sys.argv[1] == '-r'):
    reverse = True
    address = sys.argv[2]
else:
    sys.exit('Usage: %s [-r] name.domain' % sys.argv[0])

if reverse:
    if not isinstance(address, bytes):
        address = address.encode('ascii')
    print(address.decode("idna"))
else:
    if isinstance(address, bytes):
        address = address.decode(default_encoding)
    print(address.encode("idna").decode('ascii'))