import subprocess
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "tools"))

import check_fat32  # noqa: E402


def problems(name):
    return check_fat32.problems_with(Path(name))


def test_a_reserved_character_is_a_problem():
    assert any("reserved" in p for p in problems("Album/Motherf**ker.mp3"))


def test_a_trailing_dot_or_space_is_a_problem():
    """FAT eats them silently, so the name round-trips as a different name."""
    assert any("trailing" in p for p in problems("Trailing Dot./x.mp3"))
    assert any("trailing" in p for p in problems("Space /x.mp3"))


def test_an_ordinary_name_is_fine():
    assert problems("Artist/Album/01 Fine Track.mp3") == []


def test_accents_are_fine():
    assert problems("Mötley Crüe/Album/Track.mp3") == []


def test_an_over_long_path_is_a_problem():
    deep = "/".join("d" * 40 for _ in range(10)) + "/track.mp3"
    assert any("path of" in p for p in problems(deep))


def test_case_collisions_are_reported(tmp_path):
    album = tmp_path / "Album"
    album.mkdir()
    (album / "Song.mp3").write_bytes(b"x")
    (album / "SONG.mp3").write_bytes(b"x")

    completed = subprocess.run(
        [sys.executable, str(Path(check_fat32.__file__)), str(tmp_path)],
        capture_output=True,
        text=True,
    )

    assert completed.returncode == 1
    assert "collides case-insensitively" in completed.stdout


def test_a_clean_tree_exits_zero(tmp_path):
    (tmp_path / "Album").mkdir()
    (tmp_path / "Album" / "Fine.mp3").write_bytes(b"x")

    completed = subprocess.run(
        [sys.executable, str(Path(check_fat32.__file__)), str(tmp_path)],
        capture_output=True,
        text=True,
    )

    assert completed.returncode == 0
    assert "0 problems" in completed.stderr