#
# Copyright (c) 2022 Pim van Pelt
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#     http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import logging

def get_lcps(yaml, interfaces=True, loopbacks=True, bridgedomains=True):
    """ Returns a list of LCPs configured in the system. Optionally (de)select the different
    types of LCP. Return an empty list if there are none of the given type(s). """

    ret = []
    if interfaces and 'interfaces' in yaml:
        for ifname, iface in yaml['interfaces'].items():
            if 'lcp' in iface:
                ret.append(iface['lcp'])
            if 'sub-interfaces' in iface:
                for subid, sub_iface in iface['sub-interfaces'].items():
                    if 'lcp' in sub_iface:
                        ret.append(sub_iface['lcp'])

    if loopbacks and 'loopbacks' in yaml:
        for ifname, iface in yaml['loopbacks'].items():
            if 'lcp' in iface:
                ret.append(iface['lcp'])
    if bridgedomains and 'bridgedomains' in yaml:
        for ifname, iface in yaml['bridgedomains'].items():
            if 'lcp' in iface:
                ret.append(iface['lcp'])

    return ret

def is_unique(yaml, lcpname):
    """ Returns True if there is at most one occurence of the LCP name in the entire config."""

    lcps = get_lcps(yaml)
    return lcps.count(lcpname) < 2