import functools
import requests_cache
from ical.calendar_stream import IcsCalendarStream
import datetime
import logging

logger = logging.getLogger(__name__)

SESSION = requests_cache.CachedSession('calendar')

@functools.cache
def get_events_for_month(ical_link: str, today: datetime.date):
    logger.warning('Downloading ical from Google')
    response = SESSION.get(ical_link)
    assert response.status_code == 200

    logger.warning('Loading ical')
    calendar = IcsCalendarStream.calendar_from_ics(response.text)

    today = datetime.date.today()

    logger.warning('Iterating ical')
    date = today.replace(day = 1)
    stuff = []
    while date.month == today.month:
        for e in calendar.timeline.on_date(date):
            stuff.append((date, e))

        date += datetime.timedelta(days = 1)
    return stuff