import os
import paho.mqtt.client as mqtt

import logging
logging.basicConfig(level=logging.DEBUG)

# If you want to use a specific client id, use
# mqttc = mqtt.Client("client-id")
# but note that the client id must be unique on the broker. Leaving the client
# id parameter empty will generate a random id for you.
mqttc = mqtt.Client()
lastmessage = ""

def onConnect(client, userdata, flags, rc):
  print("Connected with result code "+str(rc))
  mqttc.subscribe("/sensors/spaceschalter/status", 0)

def messageReceived(client, userdata, message):
  print("received topic" + str(message.topic) + "with payload:" + str(message.payload)) 
  global lastmessage
  if (str(message.payload) == lastmessage): 
    print("already got message " + lastmessage + ", skipping.") 
    return
  lastmessage = str(message.payload)
  print("sending Message via signal…")
  os.system("signal-cli --config /home/christoph/.local/share/signal-cli/ -u +491639709611 send -m \"Machbar: %s\" -g 4itR+98YIW1Xc4BJwKKoew==" % message.payload.decode("utf-8"))

mqttc.username_pw_set("christoph","dNppWZ2nukh+RQ")

mqttc.on_message = messageReceived
mqttc.on_connect = onConnect
mqttc.connect("ccc-p.org", 1883, 60)

mqttc.loop_forever()