from pathlib import Path

from serato_doctor.scanner import scan_audio, scan_filesystem


def test_scan_audio_finds_supported_files(tmp_path):
    music = tmp_path / "music"
    nested = music / "House"
    nested.mkdir(parents=True)
    (nested / "First.MP3").write_bytes(b"synthetic audio")
    (nested / "Second.flac").write_bytes(b"fixture")
    (nested / "notes.txt").write_text("not audio", encoding="utf-8")

    tracks = scan_audio(music)

    assert {track.filename for track in tracks} == {"First.MP3", "Second.flac"}
    first = next(track for track in tracks if track.filename == "First.MP3")
    assert first.suffix == ".mp3"
    assert first.size == len(b"synthetic audio")


def test_scan_filesystem_reports_broken_symlink(tmp_path):
    music = tmp_path / "music"
    music.mkdir()
    link = music / "Missing.mp3"
    link.symlink_to("not-there.mp3")

    result = scan_filesystem(music)

    assert result.tracks == ()
    assert len(result.broken_symlinks) == 1
    assert result.broken_symlinks[0].path == link
    assert result.broken_symlinks[0].target == Path("not-there.mp3")


def test_valid_audio_symlink_is_scanned_normally(tmp_path):
    music = tmp_path / "music"
    music.mkdir()
    target = music / "Target.mp3"
    target.write_bytes(b"synthetic audio")
    link = music / "Linked.mp3"
    link.symlink_to(target)

    result = scan_filesystem(music)

    assert {track.filename for track in result.tracks} == {
        "Linked.mp3",
        "Target.mp3",
    }
    assert result.broken_symlinks == ()