"""The weekly report's hour is kept in the zone of whoever saved it, and a
reader sees it on their own clock (#5378)."""
from datetime import datetime, timezone
from zoneinfo import ZoneInfo

from steward.core.reports import report_due, schedule_in

NY = ZoneInfo("America/New_York")
BERLIN = ZoneInfo("Europe/Berlin")


def test_sunday_eight_in_new_york_is_due_at_noon_utc_in_october():
    sunday_noon_utc = datetime(2026, 10, 11, 12, 30, tzinfo=timezone.utc)   # 08:30 EDT
    assert report_due(sunday_noon_utc, 6, 8, NY)
    assert not report_due(sunday_noon_utc, 6, 8, timezone.utc)
    assert not report_due(datetime(2026, 10, 11, 8, 30, tzinfo=timezone.utc), 6, 8, NY)


def test_a_reader_sees_the_saved_hour_on_their_own_clock():
    now = datetime(2026, 10, 8, 15, 0, tzinfo=timezone.utc)
    assert schedule_in(6, 8, NY, NY, now) == (6, 8)
    assert schedule_in(6, 8, NY, BERLIN, now) == (6, 14)
    assert schedule_in(6, 8, timezone.utc, NY, now) == (6, 4)      # an old UTC schedule, read in New York
    assert schedule_in(0, 1, timezone.utc, NY, now) == (6, 21)     # Monday 01:00 UTC is Sunday evening there


def test_what_a_reader_picks_and_saves_is_what_they_see_again():
    now = datetime(2026, 10, 8, 15, 0, tzinfo=timezone.utc)
    for day in range(7):
        for hour in (0, 8, 23):
            assert schedule_in(day, hour, BERLIN, BERLIN, now) == (day, hour)