#!/usr/bin/python
# -*- coding: utf-8 -*-

import logging
import RPi.GPIO as GPIO
import os
import time
from simplemail import Email

GPIO.setwarnings(False)
GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
GPIO.setup(11, GPIO.OUT)
socket_right = 7
socket_left = 11
off = GPIO.LOW
on = GPIO.HIGH
online = 0
offline = 1
logging.basicConfig(filename='modem.log',  format='%(levelname)s %(asctime)s %(message)s', level=logging.INFO)#DEBUG#INFO

def SendMail(msg):
  mail = Email(
    smtp_server = 'smtp.gmail.com:465',
    smtp_user = '',
    smtp_password = '',
    use_ssl = True,
    from_address = '',
    to_address = '',
    subject = 'Modem TC7200',
    message = msg)
  mail.send()

def RestartSockets(left, right):
  logging.debug('RestartSockets wurde aufgerufen mit links = ' + str(left) + ' und rechts = '+ str(right))
  if left:
    GPIO.output(socket_left, off)
  if right:
    GPIO.output(socket_right, off)
  time.sleep(10)
  if left:
    GPIO.output(socket_left, on)
  if right:
    GPIO.output(socket_right, on)
  time.sleep(180)

def doPing(destination, ipx, lastStatus, msg):
  logging.debug('doPing wurde aufgerufen mit destination ' + destination + ' ipx '+ str(ipx) + ' lastStatus ' + str(lastStatus) + ' msg ' + str(msg))
  r2 = 0
  ping = "ping"
  if ipx == 6:
    ping+='6'
  ping+=" -q -c 1 " + destination
  logging.debug('gebautes ping kommando = ' + ping)
  response = os.system(ping + ' > /dev/null 2>&1')
  if response == online:
    if lastStatus == offline:
      logging.info(destination + ' wieder erreichbar.')
#      if not msg:
#        SendMail(msg)
    r1 = online
  else:
    if lastStatus == online:
      logging.info(destination + ' hat einmalig nicht geantwortet.')
    else:
      logging.info(destination + ' zweites mal nicht geantwortet, wird neugestartet.')
      r2 = time.strftime('%d.%m.%Y %H:%M') + ' ' + destination + ' hat zwei mal nicht geantwortet, modem wurde neugestartet'
    r1 = offline
  return {'status':r1, 'msg':r2 }

logging.info('Script check modem gestartet')
gateway = '192.168.0.1'
wan4 = 'unitymedia.de'
wan6 = ''
lanStat = online
wan4Stat = online
wan6Stat = online
tick = 0
tock = 60 #jede 5 minuten soll ein ping ins internet gehen
msg = 0   #wenn eine internetverbindung wieder besteht wird die nachricht per mail versendet
try:
  while 1:
    time.sleep(5)
    tick+=1
    result = doPing(gateway, 4, lanStat, msg)
    lanStat = result['status']
    msg = result['msg']
    if lanStat == offline and msg:
      RestartSockets(1 ,1)
      tick = 0
      continue
    if tick == tock:
      result = doPing(wan4, 4, wan4Stat, msg)
      wan4Stat = result['status']
      msg = result['msg']
      if wan4Stat == offline and msg:
        RestartSockets(1, 1)

      #result = doPing(wan6, 6, wan6Stat, msg)
      tick = 0
finally:
  GPIO.cleanup()
  logging.info('script abgestürzt??')