"""Next publication date of the Economist."""

from datetime import date, time, timedelta

from dateutil.relativedelta import TH, relativedelta

from . import uk_time
from .event import Event


def publication_dates(start_date: date, end_date: date) -> list[Event]:
    """List of Economist publication dates."""
    # Define the list of weeks when The Economist is not published
    non_publication_weeks = [26, 52]
    double_issue = {
        25: "Summer",
        51: "Christmas",
    }

    t = time(19, 0)

    start_thursday = start_date + relativedelta(weekday=TH(+1))
    end_thursday = end_date + relativedelta(weekday=TH(+1))
    days = (end_thursday - start_thursday).days

    events: list[Event] = []
    for offset in range(0, days, 7):
        pub_date = start_thursday + timedelta(days=offset)
        week = pub_date.isocalendar().week
        if week in non_publication_weeks:
            continue
        e = Event(name="economist", date=uk_time(pub_date, t))
        if week in double_issue:
            e.title = double_issue[week] + " double issue"
        events.append(e)

    return events