import pytest

from app.names import clean_name, next_free_name, split_name


@pytest.mark.parametrize(
    "raw, expected",
    [
        ("2026-10-01 21-33-07.mkv", "2026-10-01-21-33-07.mkv"),
        ("my  clip\tfinal.mp4", "my-clip-final.mp4"),
        ("  padded.mp4  ", "padded.mp4"),
        ("C:\\Users\\alice\\Videos\\a b.mp4", "a-b.mp4"),
        ("dir/sub/x y.png", "x-y.png"),
        ("çılgın an #1.mp4", "çılgın-an-#1.mp4"),
        ("", "upload"),
        ("   ", "upload"),
    ],
)
def test_clean_name(raw, expected):
    assert clean_name(raw) == expected


def test_split_name():
    assert split_name("clip.mp4") == ("clip", ".mp4")
    assert split_name("a.b.mkv") == ("a.b", ".mkv")


def test_split_name_edge_cases():
    assert split_name("README") == ("README", "")
    assert split_name(".mp4") == (".mp4", "")


def test_next_free_name_free():
    assert next_free_name("clip", ".mp4", lambda n: False) == "clip.mp4"


def test_next_free_name_suffixes():
    taken = {"clip.mp4", "clip-2.mp4"}
    assert next_free_name("clip", ".mp4", taken.__contains__) == "clip-3.mp4"


def test_next_free_name_no_extension():
    assert next_free_name("README", "", {"README"}.__contains__) == "README-2"


def test_next_free_name_gives_up():
    with pytest.raises(RuntimeError):
        next_free_name("x", ".mp4", lambda n: True, limit=5)