#!/usr/bin/env python

from __future__ import print_function

import argparse
import time

from unifi.controller import Controller

parser = argparse.ArgumentParser()
parser.add_argument('-c', '--controller', default='unifi', help='the controller address (default "unifi")')
parser.add_argument('-u', '--username', default='admin', help='the controller usernane (default "admin")')
parser.add_argument('-p', '--password', default='', help='the controller password')
parser.add_argument('-v', '--version', default='v2', help='the controller base version (default "v2")')
parser.add_argument('-s', '--siteid', default='default', help='the site ID, UniFi >=3.x only (default "default")')
args = parser.parse_args()

c = Controller(args.controller, args.username, args.password, args.version, args.siteid)

aps = c.get_aps()
ap_names = dict([(ap['mac'], ap['name']) for ap in aps])

client_aps = {}
while True:
    clients = c.get_clients()
    for client in clients:
        ap = ap_names[client['ap_mac']]
        mac = client['mac']
        name = client['hostname'] or client['ip'] or client['mac']
        channel = client['channel']
        rssi = client['rssi']
        key = '%s/%d' % (ap, channel)

        if mac in client_aps:
            if client_aps[mac] != key:
                print('%s roamed %s -> %s' % (name, client_aps[mac], key))
        client_aps[mac] = key
    time.sleep(10)