import datetime
import signal
import sys
from os import getenv
from telegram.ext import Updater, CommandHandler, Job
from telegram import Update
from sheets_client import authenticate_and_fetch_sheets_data

chats_mem_cache = set()


def _signal_handler(sig, frame):
    print("You pressed Ctrl+C!")
    updater = frame.f_locals["updater"]
    for chat_id in chats_mem_cache:
        updater.bot.send_message(chat_id=chat_id, text="HommaBot-palvelin sammutettu!")

    updater.stop()
    sys.exit(0)


def _callback_alarm(context):
    rows = authenticate_and_fetch_sheets_data()
    message = "\n".join(map(str, rows))
    context.bot.send_message(chat_id=context.job.context, text=message)


def _callback_timer(update: Update, context):
    update.message.reply_text(
        "HommaBot startattu. Uusia hommapäivityksiä viikon välein."
    )
    chats_mem_cache.add(update.message.chat_id)
    context.job_queue.run_repeating(
        _callback_alarm,
        datetime.timedelta(seconds=10),
        context=update.message.chat_id,
    )


def _stop_timer(update: Update, context):
    update.message.reply_text("HommaBot pysäytetty!")
    chats_mem_cache.remove(update.message.chat_id)
    context.job_queue.stop()


def run_telegram():
    updater = Updater(getenv("TELEGRAM_TOKEN"))
    updater.dispatcher.add_handler(
        CommandHandler("start", _callback_timer, pass_job_queue=True)
    )
    updater.dispatcher.add_handler(
        CommandHandler("stop", _stop_timer, pass_job_queue=True)
    )

    updater.start_polling()

    signal.signal(signal.SIGINT, _signal_handler)
    # while true:
    #     time.sleep(1)
    signal.pause()