#!/usr/bin/python
#Bosch Home Automation <> MQTT Gateway

import requests, json, time
import paho.mqtt.client as mqtt

class Mqtt2ThingBoard:
    
    #Mosquitto Settings
    client_name = "Mqtt2ThingBoardGateWay"
    host_name = "192.168.178.36"
    host_port = 1884

    mqtt_client = mqtt.Client(client_name)

    tb_gateway_user = "K9iW4T5E7tVeP4ZyapxB"
    tb_port = 1883
    tb_client = mqtt.Client(tb_gateway_user)
    tb_client.username_pw_set(tb_gateway_user,None)

    #Sent MQTT Debugging Message
    def publishDebugMsg(self,msg):
        self.mqtt_client.publish("Mqtt2ThingBoardGateWay/debug",msg,0,True)
        print(msg)

    #Sent message to MQTT telemetry
    def publishTelemetryMsg(self,msg):
        print(msg)
        self.tb_client.publish("v1/gateway/telemetry",msg,0,True)


    #react to MQTT scenario requests:
    def onMqttMessage(self, client, userdata, message):
            #currently only react on trigger="ON"
            if (str(message.payload.decode("utf-8")) == "ON"):
                self.mqtt_client.publish(message.topic,"OFF", 0,True)
                for s in self.Scenarios:
                    topic = "bsh/scenarios/"+s["name"].replace(" ","_")+"/trigger"
                    if (topic == message.topic):                    
                        self.publishDebugMsg("   Scenario triggered: "+s["name"])
                        url = self.baseurl + "/smarthome/scenarios/"+s["id"]+"/triggers"
                        postRequest = requests.post(url, data="", headers = self.getURLHeaders(),
                        verify = False, cert = self.getCertificate())
                        data =  json.loads(postRequest.text)[0]['result']
                        if "errorCode" in data:
                            self.publishDebugMsg("Error occured during Scenario Call:")
                            self.publishDebugMsg(data["errorCode"])

    #subscribe to message to trigger scenarios                
    def subscribeToMqttInputs(self):
        pass
        #TODO    
            
    #set up the system: login to MQTT + get all needed data from the BSH
    def __init__(self):                
        self.publishDebugMsg("Connecting to MQTT Server")
        ret1 = self.mqtt_client.connect(self.host_name,self.host_port)

        self.publishDebugMsg("Connecting to ThingsBoard Mqtt Gateway")
        ret2 = self.tb_client.connect(self.host_name,self.tb_port)

        self.publishDebugMsg("Setting up the Environment...")        
        
        self.publishDebugMsg("Subscribe to MQTT Messages")
        self.subscribeToMqttInputs()

        msg = {
             'TempSensorBuero': [
                  {
                       'temperature': 33.8
                  }
             ]
        }
        self.publishTelemetryMsg(json.dumps(msg))
        

    def loop(self):
            #Restart Long Polling every second
            while True:
                self.mqtt_client.loop_start()                                
                time.sleep(1)
                self.mqtt_client.loop_stop()
        


Mqtt2ThingBoardGateWay = Mqtt2ThingBoard()