#!/usr/bin/python
import sys
import time
import traceback
from datetime import datetime, timedelta

import pytz
from requests import get

from hosted import config, node

config.restart_on_update()


def log(msg):
    sys.stderr.write("[pretalx] {}\n".format(msg))


def idle(seconds, event_start, event_tz):
    end = time.time() + seconds
    log("sleeping for {} seconds".format(seconds))
    while time.time() < end:
        send_data = {
            'day': '??',
            'time': time.time()
        }
        if event_start is not None:
            event_now = datetime.now(event_tz)
            utc_now = datetime.now(pytz.utc)

            utc_offset = (event_now - utc_now).total_seconds()

            day_zero = event_start.replace(
                hour=0,
                minute=0,
                second=0,
                tzinfo=timezone
            ) - timedelta(days=1)

            day_info = event_now - day_zero

            log("Day0: {}".format(day_zero.isoformat()))
            log("NOW:  {}".format(event_now.isoformat()))

            send_data['day'] = day_info.days

        for k,v in send_data.items():
            node.send_raw('root/plugin/pretalx/{}:{}'.format(k, v))
            node.send_raw('root/plugin/pretalx-broadcast-tools/{}:{}'.format(k, v))
        time.sleep(1)


def main():
    event_info = None
    event_start = None
    schedule = None
    event_tz = pytz.utc

    while True:
        event_url = config["event_url"]
        if not event_url.endswith("/"):
            event_url = event_url + "/"
        if "example.com" in event_url:
            log("default event url, waiting for config update")
            # sleep forever, service will get restarted if the config
            # changes.
            time.sleep(99999999)

        log("event url: {}".format(event_url))

        try:
            r = get(
                event_url + "p/broadcast-tools/event.json",
            )
            r.raise_for_status()
        except Exception as e:
            log("updating event info failed: {}".format(repr(e)))
            # Only print the error message. If we have fetched the event
            # info json blob atleast once, we have all the information
            # we need.
        else:
            event_info = r.json()
            node.write_json("event.json", event_info)
            log("updated event info json")

        if event_info is not None:
            event_start = datetime.strptime(event_info["start"], "%Y-%m-%d")
            event_tz = pytz.timezone(event_info['timezone'])

        try:
            r = get(
                event_url + "p/broadcast-tools/schedule.json",
            )
            r.raise_for_status()
        except Exception as e:
            log("updating schedule failed: {}".format(repr(e)))
            # Only print the error message. If we have fetched the schedule
            # info json blob atleast once, we have all the information
            # we need.
        else:
            schedule = r.json()
            for talk in schedule['talks']:
                talk['start_str'] = datetime.fromtimestamp(talk['start_ts']).astimezone(event_tz).strftime('%H:%M')
            node.write_json("schedule.json", schedule)
            log("updated schedule json")

        idle(30, event_start, event_tz)


if __name__ == "__main__":
    try:
        main()
    except:
        traceback.print_exc()
        time.sleep(30)