import time
import logging
import sys
import paho.mqtt.client as mqtt
from pyfirmata import Arduino, INPUT

PULLUP = 0x0b

MIN_REPEAT_SEC = .5

logging.basicConfig(level=logging.INFO)
log = logging.getLogger()

dev, = sys.argv[1:]

client = mqtt.Client()
client.will_set('doorbell/online', '0', qos=0, retain=False)
client.connect('bang')

log.info(f'connecting to {dev}')
# note that I set StandardFirmata to double baud rate
board = Arduino(dev, baudrate=115200)
log.info('done')

pin = board.get_pin('d:2:i')
pin.mode = PULLUP  # config msg to send to firmata
pin._mode = INPUT  # fake value so pyfirmata still reads this pin

log.info('running mqtt client')
client.loop_start()
log.info('done')

client.publish('doorbell/online', '1')

last_value = None
last_edge = 0


def on_press(t):
    global last_edge
    if t > last_edge + MIN_REPEAT_SEC:
        log.info(f'press {t=}')
        client.publish('doorbell/button', 'press')
        log.info('published')
    last_edge = t


try:
    while True:
        now = time.time()
        board.iterate()
        value = pin.read()
        if value == 0 and last_value == 1:
            on_press(now)
        last_value = value
        client.loop()
except Exception:
    client.publish('doorbell/online', '0')
    client.disconnect()
    raise