import vobject
from datetime import date, datetime
from pathlib import Path

from .types import Event

def create_event(name: str, base_id: str, eventDate: Event) -> tuple[str, str]:

    year = eventDate.year or datetime.now().year
    dt = date(year, eventDate.month, eventDate.day)

    id = base_id

    cal = vobject.iCalendar()
    event = cal.add('vevent')
    event.add('uid').value = id
    event.add('summary').value = f"{name}, {eventDate.name}"
    event.add('description').value = (f"{eventDate.year}-" if eventDate.year is not None else "") + f"{eventDate.month:02}-{eventDate.day:02}"
    event.add('dtstart').value = dt
    event.add('rrule').value = 'FREQ=YEARLY'

    return id, cal.serialize()

def write_calendar_event(prefix: str, event: Event, dir: Path):
    evtid, ics = create_event(prefix, f"{id}-{event.id}", event)
    with open(dir / f"{evtid}.ics", 'w') as f:
        f.write(ics)