"""
MicroPython IoT Weather Station Example for Wokwi.com

To view the data:

1. Go to http://www.hivemq.com/demos/websocket-client/
2. Click "Connect"
3. Under Subscriptions, click "Add New Topic Subscription"
4. In the Topic field, type "wokwi-weather" then click "Subscribe"

Now click on the DHT22 sensor in the simulation,
change the temperature/humidity, and you should see
the message appear on the MQTT Broker, in the "Messages" pane.

Copyright (C) 2022, Uri Shaked

https://wokwi.com/arduino/projects/322577683855704658
"""

import network
import time
import utime
from machine import Pin
import dht
import ujson
from umqtt.simple import MQTTClient

last_interrupt_time = 0

#function definitions
def togleLights(pin):
    global last_interrupt_time
    if time.time() > last_interrupt_time + 0.2:
        print("lights")
        message = ujson.dumps({
                "type": "device",
                "device": "lamp"
            })
        client.publish(MQTT_TOPIC, message)
        last_interrupt_time = time.time()

def togleFan(pin):
    global last_interrupt_time
    global fan
    if time.time() > last_interrupt_time + 0.2:
        print("fan")
        fan = not(fan)
        relayPin.value(fan)
        last_interrupt_time = time.time()

# MQTT Server Parameters
MQTT_CLIENT_ID = "micropython-weather-dom1"
MQTT_BROKER    = "broker.mqttdashboard.com"
MQTT_USER      = ""
MQTT_PASSWORD  = ""
MQTT_TOPIC     = "dom1"

# HW setup
lightButtonPin = Pin(34, Pin.IN)
fanButtonPin = Pin(35, Pin.IN)
relayPin = Pin(2, Pin.OUT)
lightButtonPin.irq(trigger=Pin.IRQ_FALLING, handler=togleLights)
fanButtonPin.irq(trigger=Pin.IRQ_FALLING, handler=togleFan)
sensor = dht.DHT22(Pin(15))

#internals
nextWeatherCheck = 0
weatherCheckDelay = 1 #in seconds

fan = False
light = False

#setup
print("Connecting to WiFi", end="")
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected():
  print(".", end="")
  time.sleep(0.1)
print(" Connected!")

print("Connecting to MQTT server... ", end="")
client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER, user=MQTT_USER, password=MQTT_PASSWORD)
client.connect()

print("Connected!")

#main
prev_weather = ""
nextWeatherCheck = time.time()
nextButtonCheck = time.time()
while True:
    #MQTT
    if(time.time() >= nextWeatherCheck):
        nextWeatherCheck+=weatherCheckDelay
        print("Measuring weather conditions... ", end="")
        sensor.measure() 
        message = ujson.dumps({
            "type": "weather",
            "temp": sensor.temperature(),
            "humidity": sensor.humidity(),
        })
        if message != prev_weather:
            print("Updated!")
            print("Reporting to MQTT topic {}: {}".format(MQTT_TOPIC, message))
            client.publish(MQTT_TOPIC, message)
            prev_weather = message
        else:
            print("No change")