from pathlib import Path

from serato_doctor.matching import MatchingEngine, score_candidate
from serato_doctor.models.reference import TrackReference
from serato_doctor.models.track import DiskTrack


def reference(filename, folder="House"):
    return TrackReference(
        Path("Test.crate"), Path("/old") / folder / filename, filename
    )


def track(filename, folder="House"):
    path = Path("/new") / folder / filename
    return DiskTrack(path, filename, 100, path.suffix.lower())


def test_exact_candidate_has_full_evidence_score():
    match = score_candidate(reference("Track.mp3"), track("Track.mp3"))

    assert match.score == 90
    assert match.max_score == 90
    assert match.score_percent == 100.0
    assert all(item.matched for item in match.evidence)


def test_cloud_conflict_suffix_is_explained():
    match = score_candidate(reference("Track.mp3"), track("Track 2.mp3"))

    assert match.score == 80
    assert match.score_percent == 88.9
    assert match.evidence[0].explanation == (
        "Filename matches after removing a numeric conflict suffix"
    )


def test_case_normalized_match_scores_below_exact():
    match = score_candidate(reference("TRACK.MP3"), track("track.mp3"))

    assert match.score == 85
    assert match.evidence[0].points == 55


def test_engine_omits_unrelated_filenames():
    engine = MatchingEngine([track("Different.mp3")])

    assert engine.candidates_for(reference("Missing.mp3")) == ()


def test_ambiguous_candidates_are_ranked_deterministically():
    engine = MatchingEngine(
        [track("Track 2.mp3", "Other"), track("Track 3.mp3", "House")]
    )

    matches = engine.candidates_for(reference("Track.mp3"))

    assert [match.track.filename for match in matches] == [
        "Track 3.mp3",
        "Track 2.mp3",
    ]
    assert [match.score for match in matches] == [80, 60]