#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import json
import os
import subprocess
import sys

iface_type = os.environ.get('BLOCK_INSTANCE', 'ethernet')
label = ''
color_up = '#B8A391'
color_down = '#676767'


def _get_first_ifname(ifaces, iface_type=iface_type):

    iface_up = None
    iface_first = None

    for iface in ifaces:
        if iface_type == 'ethernet' and \
                iface['ifname'].startswith('e'):
            iface_first = iface if not iface_first else None
            iface_up = iface if iface['operstate'] == 'UP' else None

        elif iface_type == 'wireless' and \
                iface['ifname'].startswith('wl'):
            iface_first = iface if not iface_first else None
            iface_up = iface if iface['operstate'] == 'UP' else None

    if iface_up:
        return iface_up
    else:
        return iface_first


if __name__ == "__main__":
    output = subprocess.check_output(
        "ip -br -j addr show",
        shell=True
    )
    json_str = output.decode('utf8')
    ifaces = json.loads(json_str)

    first = _get_first_ifname(ifaces, iface_type)

    if first:
        try:
            print('{} {}'.format(label, first['addr_info'][0]['local']))
            print(label)
            print(color_up)
        except Exception:
            print('{} ip'.format(label))
            print(label)
            print(color_down)