#!/usr/bin/env python3

# Change syntax of bridge interface
# - move interface based bridge-group to actual bridge (de-nest)
# - make stp and igmp-snooping nodes valueless
# https://phabricator.vyos.net/T1556

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()

config = ConfigTree(config_file)
base = ['interfaces', 'bridge']

#
# make stp and igmp-snooping nodes valueless
#
for br in config.list_nodes(base):
    # STP: check if enabled
    stp_val = config.return_value(base + [br, 'stp'])
    # STP: delete node with old syntax
    config.delete(base + [br, 'stp'])
    # STP: set new node - if enabled
    if stp_val == "true":
        config.set(base + [br, 'stp'], value=None)

    # igmp-snooping: check if enabled
    igmp_val = config.return_value(base + [br, 'igmp-snooping', 'querier'])
    # igmp-snooping: delete node with old syntax
    config.delete(base + [br, 'igmp-snooping', 'querier'])
    # igmp-snooping: set new node - if enabled
    if igmp_val == "enable":
        config.set(base + [br, 'igmp', 'querier'], value=None)

#
# move interface based bridge-group to actual bridge (de-nest)
#
bridge_types = ['bonding', 'ethernet', 'l2tpv3', 'openvpn', 'vxlan', 'wireless']
for type in bridge_types:
    if not config.exists(['interfaces', type]):
        continue

    for intf in config.list_nodes(['interfaces', type]):
        # check if bridge-group exists
        if config.exists(['interfaces', type, intf, 'bridge-group']):
            bridge = config.return_value(['interfaces', type, intf, 'bridge-group', 'bridge'])

            # create new bridge member interface
            config.set(base + [bridge, 'member', 'interface', intf])
            # format as tag node to avoid loading problems
            config.set_tag(base + [bridge, 'member', 'interface'])

            # cost: migrate if configured
            if config.exists(['interfaces', type, intf, 'bridge-group', 'cost']):
                cost = config.return_value(['interfaces', type, intf, 'bridge-group', 'cost'])
                # set new node 
                config.set(base + [bridge, 'member', 'interface', intf, 'cost'], value=cost)

            if config.exists(['interfaces', type, intf, 'bridge-group', 'priority']):
                priority = config.return_value(['interfaces', type, intf, 'bridge-group', 'priority'])
                # set new node
                config.set(base + [bridge, 'member', 'interface', intf, 'priority'], value=priority)

            # Delete the old bridge-group assigned to an interface
            config.delete(['interfaces', type, intf, 'bridge-group'])

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