from typing import Optional

from domain.abri.phone_selection import (
    PhoneEntry,
    SelectedPhoneNumbers,
    select_phone_numbers,
)


def _mobile(number: str, priority: Optional[str] = None) -> PhoneEntry:
    return PhoneEntry(kind="mobile", number=number, priority=priority)


def _telephone(number: str, priority: Optional[str] = None) -> PhoneEntry:
    return PhoneEntry(kind="telephone", number=number, priority=priority)


def test_no_entries_selects_nothing() -> None:
    assert select_phone_numbers([]) == SelectedPhoneNumbers(
        mobile=None, telephone=None, secondary=None
    )


def test_lowest_numeric_priority_wins_within_a_kind() -> None:
    # Arrange
    entries = [
        _mobile("07700900020", priority="20"),
        _mobile("07700900005", priority="5"),
        _mobile("07700900010", priority="10"),
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected.mobile == "07700900005"


def test_entries_without_a_usable_priority_sort_last() -> None:
    # Arrange
    entries = [
        _mobile("07700900001"),  # missing priority
        _mobile("07700900002", priority="abc"),  # non-numeric priority
        _mobile("07700900003", priority="99"),
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected.mobile == "07700900003"


def test_priority_ties_break_by_document_order() -> None:
    # Arrange
    entries = [
        _telephone("01632960001", priority="7"),
        _telephone("01632960002", priority="7"),
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected.telephone == "01632960001"


def test_blank_numbers_are_ignored_even_at_best_priority() -> None:
    # Arrange
    entries = [
        _mobile("   ", priority="1"),
        _mobile("07700900002", priority="2"),
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected == SelectedPhoneNumbers(
        mobile="07700900002", telephone=None, secondary=None
    )


def test_secondary_is_the_best_of_the_pooled_leftovers_of_both_kinds() -> None:
    # Arrange
    entries = [
        _mobile("07700900005", priority="5"),  # best mobile
        _mobile("07700900020", priority="20"),  # leftover
        _telephone("01632960003", priority="3"),  # best landline
        _telephone("01632960007", priority="7"),  # best leftover: wins secondary
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected == SelectedPhoneNumbers(
        mobile="07700900005", telephone="01632960003", secondary="01632960007"
    )


def test_no_secondary_when_the_best_picks_use_every_number() -> None:
    # Arrange
    entries = [
        _mobile("07700900005", priority="5"),
        _telephone("01632960003", priority="3"),
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected.secondary is None


def test_a_single_kind_still_yields_a_secondary_from_its_own_leftovers() -> None:
    # Arrange
    entries = [
        _telephone("01632960001", priority="1"),
        _telephone("01632960002", priority="2"),
    ]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected == SelectedPhoneNumbers(
        mobile=None, telephone="01632960001", secondary="01632960002"
    )


def test_selected_numbers_are_stripped_of_surrounding_whitespace() -> None:
    # Arrange
    entries = [_mobile(" 07700900123 ", priority="1")]

    # Act
    selected = select_phone_numbers(entries)

    # Assert
    assert selected.mobile == "07700900123"