#!/usr/bin/env python3

# converts 'set system syslog host <address>:<port>'
# to 'set system syslog host <address> port <port>'

import sys
import re

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()

config = ConfigTree(config_file)
cbase = ['system', 'syslog', 'host']

if not config.exists(cbase):
    sys.exit(0)
else:
    config.set(cbase)
    config.set_tag(cbase)
    for host in config.list_nodes(cbase):
        h = None
        pt = None
        if re.search('^[a-zA-Z\-0-9\.]+', host):
            h = re.search('^[a-zA-Z\-0-9\.]+', host).group(0)
        if re.search(':[0-9]+$', host):
            pt = re.sub(':', '', re.search(':[0-9]+$', host).group(0))

        config.set(cbase + [h])
        for fac in config.list_nodes(cbase + [host, 'facility']): 
            config.set(cbase + [h, 'facility', fac])
            config.set_tag(cbase + [h, 'facility'])
            lvl = config.return_value(cbase + [host, 'facility', fac, 'level'])
            prot = config.return_value(cbase + [host, 'facility', fac, 'protocol'])
            config.set(cbase + [h, 'facility', fac, 'level'], value=lvl)
            # port can be be in each tag node and different, 
            # that's something we can't fix here
            if prot:
                config.set(cbase + [h, 'protocol'], value=prot)
        config.set(cbase + [h, 'port'], value=pt)
        config.delete(cbase + [host])

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