import time
import board
import adafruit_dht
import psutil
import random

from paho.mqtt import client as mqtt_client

name = 'test'
broker = '192.168.0.196'
port = 1883
tempTopic = "home/office/climate/temp"
humidTopic = "home/office/climate/humid"
username = 'mqtt'
password = 'falrenforbreakfast'

client_id = f'python-mqtt-office-{random.randint(0, 1000)}'

#We first check if a libgpiod process is running. If yes, we kill it!
for proc in psutil.process_iter():
    if proc.name() == 'libgpiod_pulsein' or proc.name() == 'libgpiod_pulsei':
        proc.kill()

#D20 is the pin number, DHT11 is the sensor type
sensor = adafruit_dht.DHT11(board.D20)

def connect_mqtt():
    def on_connect(client, userdata, flags, rc):
        if rc == 0:
            print("Connected to MQTT Broker!")
        else:
            print("Failed to connect, return code %d\n", rc)

    client = mqtt_client.Client(client_id)
    client.username_pw_set(username, password)
    client.on_connect = on_connect
    client.connect(broker, port)
    return client


def getValues(sensor):
    try:
        temp = sensor.temperature
        humidity = sensor.humidity
        
        #convert to Farenheit
        temp = (temp * 1.8) + 32
        #Round the decimals
        temp = round(temp, 2)
        #print("Temperature: {}*F   Humidity: {}% ".format(temp, humidity))
    except RuntimeError as error:
        print(error.args[0])
        time.sleep(2.0)
    except Exception as error:
        sensor.exit()
        raise error
    return temp, humidity


def publish(client, temp, humidity):      
        #Publish Temp Results
        tempMsg = '{{ "temperature": "{}" }}'.format(temp)
        #tempMsg = temp
        result = client.publish(tempTopic, tempMsg)
        status = result[0]
        if status == 0:
            #print(f"Send `{tempMsg}` to topic `{tempTopic}`")
            pass
        else:
            print(f"Failed to send message to topic {tempTopic}")

        #Publish Humid Results
        humidMsg = '{{ "humidity": "{}" }}'.format(humidity)
        result = client.publish(humidTopic, humidMsg)
        status = result[0]
        if status == 0:
            #print(f"Send `{humidMsg}` to topic `{humidTopic}`")
            pass
        else:
            print(f"Failed to send message to topic {humidTopic}")
        
        
    

while True:
    client = connect_mqtt()
    client.loop_start()
    #temp, humidity = getValues(sensor)
    getValues(sensor)
    publish(client, temp, humidity)
    time.sleep (60.0)
    client.loop_stop()    #Stop loop 
    client.disconnect() # disconnect