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)}'

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

#MQTT Connection
# def on_connect(client, rc):
#     if rc == 0:
#         print("Connected to MQTT Broker!")
#     else:
#         print("Failed to connect, return code %d\n", rc)
#     #MQTT Connect
#     client = mqtt_client.Client(client_id)
#     client.username_pw_set(username, password)
#     client.on_connect = on_connect
#     client.connect(broker, port)
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():
    try:
        temp = sensor.temperature
        humidity = sensor.humidity
        
        #convert to Farenheit
        temp = (temp * 1.8) + 32
        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)
        result = client.publish(tempTopic, tempMsg)
        # result: [0, 1]
        status = result[0]
        if status == 0:
            print(f"Send `{tempMsg}` to topic `{tempTopic}`")
        else:
            print(f"Failed to send message to topic {tempTopic}")

        #Publish Humid Results
        humidMsg = '{{ "humidity": {} }}'.format(humidity)
        result = client.publish(humidTopic, humidMsg)
        # result: [0, 1]
        status = result[0]
        if status == 0:
            print(f"Send `{humidMsg}` to topic `{humidTopic}`")
        else:
            print(f"Failed to send message to topic {humidTopic}")
        
        time.sleep(5.0)
    

def run():
    # 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()
    client = connect_mqtt()
    client.loop_start()
    while True:
        temp = getValues()
        humidity = getValues()
        publish(client, temp, humidity)

if __name__ == '__main__':
    run()