import os, logging
DEBUG = os.environ.get('DEBUG')
logging.basicConfig(
        format='[%(asctime)s] %(levelname)s %(module)s/%(funcName)s - %(message)s',
        level=logging.DEBUG if DEBUG else logging.INFO)
logging.getLogger('aiohttp').setLevel(logging.DEBUG if DEBUG else logging.WARNING)

import os
import sys
import asyncio
import aiohttp
import RPi.GPIO as GPIO
import time
from signal import *
from aiohttp import ClientSession, CookieJar

import settings

from pyunifiprotect.unifi_protect_server import UpvServer

RELAY_ON = False
RELAY_OFF = True

allow_watchdog = False

def set_relay(pin, state):
    GPIO.output(pin, state)
    logging.info('Set relay on pin %s to %s', pin, 'ON' if state == RELAY_ON else 'OFF')

def pulse_relay(pin):
    set_relay(pin, RELAY_ON)
    time.sleep(0.5)
    set_relay(pin, RELAY_OFF)

def ring_bell(mac):
    global allow_watchdog
    if not allow_watchdog and not DEBUG:
        logging.info('Enabling watchdog...')
        allow_watchdog = True

    try:
        doorbell = settings.DOORBELLS[mac]
        pulse_relay(doorbell['gpio'])
    except KeyError:
        logging.error('Doorbell %s not found!', mac)

def subscriber(updated):
    logging.debug('Subscription: updated=%s', updated)

    for _, data in updated.items():
        if data['event_type'] == 'ring' and data['event_ring_on']:
            logging.info('%s: %s is ringing!', data['mac'], data['name'])
            ring_bell(data['mac'])

def feed_watchdog():
    with open('/dev/watchdog', 'w') as wdt:
        wdt.write('1')

async def ws_listener():
    session = ClientSession(cookie_jar=CookieJar(unsafe=True))

    unifiprotect = UpvServer(
        session,
        settings.UFP_ADDRESS,
        settings.UFP_PORT,
        settings.UFP_USERNAME,
        settings.UFP_PASSWORD,
    )

    await unifiprotect.check_unifi_os()
    await unifiprotect.update()

    unsub = unifiprotect.subscribe_websocket(subscriber)

    while True:
        if allow_watchdog and not DEBUG:
            feed_watchdog()
        await asyncio.sleep(1)

    await session.close()
    unsub()

def disable_relays_on_exit(*args):
    logging.info('Exiting, disabling relays...')
    for _, doorbell in settings.DOORBELLS.items():
        set_relay(doorbell['gpio'], RELAY_OFF)
    logging.info('Goodbye.')
    os._exit(0)

def init():
    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)

    for _, doorbell in settings.DOORBELLS.items():
        GPIO.setup(doorbell['gpio'], GPIO.OUT)
        pulse_relay(doorbell['gpio'])
        time.sleep(1)
    logging.info('GPIO initialized')

    for sig in (SIGABRT, SIGILL, SIGINT, SIGSEGV, SIGTERM):
        signal(sig, disable_relays_on_exit)
    logging.info('Signals initialized')

if __name__ == '__main__':
    logging.info('')
    logging.info('======================================')
    logging.info('Boot up...')
    init()

    loop = asyncio.get_event_loop()
    loop.run_until_complete(ws_listener())
    loop.close()