import re
import getpass
import sys
import telnetlib
import time, threading
from subprocess import check_output

def routerTelnet():
    print (time.ctime())

    speedText = check_output(['C:\Program Files\cFosSpeed\spd.exe', 'speed']).decode('utf-8')

    regex = re.compile(r'txspeed=(\d+|\d+\.\d+)[K|\s]\s+fixed=', re.MULTILINE)

    matches = [m.groups() for m in regex.finditer(speedText)]

    print (speedText)
    print (matches)

    upspeed = float(matches[0][0])

    if upspeed > 1024:
        upspeed /= 1024;

    print ("upload speed = ", upspeed)

    if  upspeed < 20.0 and upspeed > 4.0:
        print("speed dropped: ")

        HOST = "192.168.1.1"
        user = 'admin'
        password = '?password?'

        tn = telnetlib.Telnet()
        tn.open(HOST, 23)
        tn.read_until( 'Username: '.encode('ascii'))
        tn.write((user + "\r\n").encode('ascii'))

        tn.read_until( 'Password: '.encode('ascii'))
        tn.write((password + "\r\n").encode('ascii')  )

        print("restarting the router")

        tn.write( ('reboot' + '\r\n').encode('ascii'))

        print(tn.read_all())
    else:
        print("speed is normal")

    threading.Timer(1 * 60 * 15, routerTelnet).start()

routerTelnet()