#!/usr/bin/env python3

# Convert "service pppoe-server interface ethX"
# to:
# "service pppoe-server interface ethX {}"

import sys

from vyos.configtree import ConfigTree

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

file_name = sys.argv[1]

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

ctree = ConfigTree(config_file)
cbase = ['service', 'pppoe-server','interface']

if not ctree.exists(cbase):
  sys.exit(0)
else:
  nics = ctree.return_values(cbase)
  # convert leafNode to a tagNode
  ctree.set(cbase)
  ctree.set_tag(cbase)
  for nic in nics:
    ctree.set(cbase + [nic])

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