#!/usr/bin/python3

import RPi.GPIO as GPIO
import time
import requests

relay_pin = 11
#GPIO.setmode(GPIO.BCM) # GPIO umbers instead of board numbers.
GPIO.setmode(GPIO.BOARD)
GPIO.setup(relay_pin, GPIO.OUT)


def main():
    try:
        while True:
            # Make sure the U.R.L. is valid.
            r = requests.get('http://3.9.19.84/api/readings/latest/1')        
            # print(r.status_code) # For testing.
            data = r.json()
            # print(data) # For testing.
            the_reading = data.get("reading")
            # print(the_reading) # For testing.
            if the_reading > 30:
                print(f"[INFO] Light is on -- {the_reading}.")
                GPIO.output(relay_pin, GPIO.HIGH)
            else:
                print(f"[INFO] Light is off -- {the_reading}.")
                GPIO.output(relay_pin, GPIO.LOW)
    except KeyboardInterrupt:
        print("Keyboard Interrupt: quitting program.")
    except:
        print("Error updating light reading...")
    finally:
        print("Cleaning up GPIO before closing...")
        GPIO.cleanup()

if __name__ == "__main__" :
    main()