from __future__ import annotations

from datetime import date

from teamlandkarte_mcp.utils.dates import availability_overlaps


def test_availability_overlaps_open_ended_capacity_end() -> None:
    cap_begin = date(2025, 1, 1)
    cap_end = None

    assert availability_overlaps(
        cap_begin, cap_end, date(2025, 2, 1), date(2025, 2, 28)
    )
    assert availability_overlaps(cap_begin, cap_end, None, date(2025, 2, 28))
    assert availability_overlaps(cap_begin, cap_end, date(2024, 12, 1), None)


def test_availability_overlaps_non_overlapping() -> None:
    assert not availability_overlaps(
        date(2025, 1, 1),
        date(2025, 1, 31),
        date(2025, 2, 1),
        date(2025, 2, 28),
    )


def test_availability_overlaps_inclusive_edges() -> None:
    assert availability_overlaps(
        date(2025, 1, 1),
        date(2025, 1, 31),
        date(2025, 1, 31),
        date(2025, 2, 1),
    )