service

#!/usr/bin/python
from hosted import CONFIG
from hosted import NODE

from calendar import timegm
from datetime import datetime
import pytz

import sys
import time


CONFIG.restart_on_update()


def log(msg):
    print >>sys.stderr, "[service]   %s" % msg


def __get_now_in_config_tz(now):
    now = now.replace(tzinfo=pytz.utc)
    return now.astimezone(pytz.timezone(CONFIG['timezone']))


def current_time():
    now = datetime.utcnow().replace(tzinfo=pytz.utc)
    timestamp = timegm(now.timetuple()) + now.microsecond / 1000000.
    return now, timestamp


def send_clock(now, ts):
    now = __get_now_in_config_tz(now)
    NODE.send('/clock/set:%f,%d,%d,%d' % (ts, now.hour,  now.minute, now.second))


def main():
    while 1:
        now, ts = current_time()
        if now.year < 2000:
            # Guard against NTP time not beeing synchronized yet.
            # On the pi the year will be 1970 in that case.
            log("too soon! ... waiting a little for NTP to sync the clock (current time: %s / %s)" % (now, ts))
            time.sleep(1)
            continue

        log("current time: %s / %s" % (now, ts))
        send_clock(now, ts)
        time.sleep(10)


if __name__ == "__main__":
    main()