# coding: utf-8

import re
import os
from netaddr import *


class Detect(object):
    def __init__(self):
        self.iplist = list()

    def list_bridges(self):
        return os.popen('ifconfig').read()

    def detect(self, ip_for_vm):
        ip4vm = IPAddress(ip_for_vm)
        c = list()
        for paragraph in self.list_bridges().split('\n\n'):

            # ma = re.compile("(br\d+).*HWaddr ([^ ]+).*addr:([^ ]+).*Mask:([^ ]+)", re.MULTILINE | re.DOTALL)
            ma = re.compile("(virbr\d+|br\d+|br\d:\d+) .*HWaddr ([^ ]+).*addr:([^ ]+).*Mask:([^ ]+)", re.MULTILINE | re.DOTALL)

            result = ma.match(paragraph)

            if result:
                vlan = result.group(1).rstrip()
                mac = result.group(2).rstrip()
                ip = result.group(3).rstrip()
                mask = result.group(4).rstrip()

                # inrange
                ip.split('.')

                m = mac.split(':')
                mac = m[0] + m[1] + "." + m[2] + m[3] + "." + m[4] + m[5]

                # print "vlan:", vlan
                # print "ip:",ip
                # print "mac:", mac
                ipn = IPNetwork(ip, mask)

                c.append(dict(interface=vlan, ip=ip, mask=mask, mac=mac, valid=True if ip4vm in ipn else False))
        return c

    def get_suitable_interface(self, ip):
        for interface in self.detect(ip):
            if interface['valid']:
                return interface['interface']