from typing import Optional

import pytest

from domain.abri.slots import slot_for_confirmed_time


@pytest.mark.parametrize("confirmed_time", [None, "", "   "])
def test_a_booking_with_no_confirmed_time_is_an_all_day_appointment(
    confirmed_time: Optional[str],
) -> None:
    # Act
    slot = slot_for_confirmed_time(confirmed_time)

    # Assert
    assert slot == "AD"


@pytest.mark.parametrize("confirmed_time", ["08:00", "09:30", "11:59"])
def test_a_confirmed_time_before_midday_books_the_morning_slot(
    confirmed_time: str,
) -> None:
    # Act
    slot = slot_for_confirmed_time(confirmed_time)

    # Assert
    assert slot == "AM"


@pytest.mark.parametrize("confirmed_time", ["12:00", "13:15", "16:59"])
def test_a_confirmed_time_at_or_after_midday_books_the_afternoon_slot(
    confirmed_time: str,
) -> None:
    # Act
    slot = slot_for_confirmed_time(confirmed_time)

    # Assert
    assert slot == "PM"


@pytest.mark.parametrize("confirmed_time", ["half nine", "25:00", "9.30am"])
def test_an_unparseable_confirmed_time_fails_loudly_rather_than_booking_all_day(
    confirmed_time: str,
) -> None:
    # Act / Assert
    with pytest.raises(ValueError):
        slot_for_confirmed_time(confirmed_time)