musicfetch/tests/test_repair.py

import server.mf  # noqa: F401 — loads musicfetch, registers musicfetch_core
import musicfetch_core as mf

YT_ID = "dQw4w9WgXcQ"  # valid 11-char YouTube id


# ---- _is_source_dir ----
def test_is_source_dir():
    assert mf._is_source_dir("youtube") is True
    assert mf._is_source_dir("soundcloud") is True
    assert mf._is_source_dir("downloads") is True
    assert mf._is_source_dir("Discovery") is False            # Lidarr album folder
    assert mf._is_source_dir("Random Access Memories") is False
    assert mf._is_source_dir("") is False


# ---- _parse_track_file ----
def test_parse_track_file():
    assert mf._parse_track_file("Under My Skin [nGSNF2l44Zc].opus") == ("Under My Skin", "nGSNF2l44Zc")
    assert mf._parse_track_file("Ignomon [2202690443].m4a") == ("Ignomon", "2202690443")
    # greedy title: real id is the LAST bracket
    assert mf._parse_track_file("WHO GON' SLIDE [Official Music Video] [AxjP9s6J3uY].opus") \
        == ("WHO GON' SLIDE [Official Music Video]", "AxjP9s6J3uY")
    assert mf._parse_track_file("no-id-here.opus") is None
    assert mf._parse_track_file("cover.jpg") is None


# ---- _repair_id_ok ----
def test_repair_id_ok():
    assert mf._repair_id_ok("youtube", YT_ID) is True
    assert mf._repair_id_ok("youtube", "Official Video") is False   # space, wrong length
    assert mf._repair_id_ok("youtube", "Cover") is False
    assert mf._repair_id_ok("soundcloud", "2202690443") is True
    assert mf._repair_id_ok("soundcloud", "abc") is False
    assert mf._repair_id_ok("bandcamp", "x") is False


# ---- _valid_year ----
def test_valid_year():
    assert mf._valid_year({"release_year": 2001}) == "2001"
    assert mf._valid_year({"release_date": "1976-09-10"}) == "1976"
    assert mf._valid_year({"upload_date": "20110101"}) == ""    # upload date ignored
    assert mf._valid_year({"release_year": 6577}) == ""         # out of range
    assert mf._valid_year({}) == ""


# ---- _repair_probe_url ----
def test_repair_probe_url():
    assert mf._repair_probe_url("youtube", YT_ID) == f"https://music.youtube.com/watch?v={YT_ID}"
    assert mf._repair_probe_url("soundcloud", "123") == "https://api.soundcloud.com/tracks/123"
    assert mf._repair_probe_url("bandcamp", "x") is None


# ---- repair_file (fake audio + mocked metadata) ----
class _FakeAudio(dict):
    def __init__(self, initial):
        super().__init__(initial)
        self.saved = False

    def save(self):
        self.saved = True


def test_repair_file_fixes_album_and_year(monkeypatch):
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: {"artist": "Daft Punk", "title": "Aerodynamic",
                                     "album": "Discovery", "release_year": 2001})
    audio = _FakeAudio({"artist": ["Daft Punk"], "title": ["Aerodynamic"]})  # album/date missing
    monkeypatch.setattr(mf, "_open_audio", lambda path: (audio, None))
    changed = mf.repair_file(f"X/youtube/Aerodynamic [{YT_ID}].opus", "youtube", dry_run=False)
    assert set(changed) == {"album=Discovery", "date=2001"}
    assert audio["album"] == ["Discovery"]
    assert audio["date"] == ["2001"]
    assert audio.saved is True


def test_repair_file_dry_run_writes_nothing(monkeypatch):
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: {"artist": "A", "title": "T", "album": "Alb", "release_year": 2020})
    audio = _FakeAudio({})
    monkeypatch.setattr(mf, "_open_audio", lambda path: (audio, None))
    changed = mf.repair_file(f"X/youtube/T [{YT_ID}].opus", "youtube", dry_run=True)
    assert changed
    assert audio == {}
    assert audio.saved is False


def test_repair_file_skips_music_video(monkeypatch):
    # No album AND no valid release year -> treat as a video, leave tags alone.
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: {"title": "Artist - Song (Official Music Video)",
                                     "uploader": "SomeVEVO", "upload_date": "20110101"})
    audio = _FakeAudio({"artist": ["Real Artist"], "title": ["Song"]})
    monkeypatch.setattr(mf, "_open_audio", lambda path: (audio, None))
    changed = mf.repair_file(f"X/youtube/Song [{YT_ID}].opus", "youtube", dry_run=False)
    assert changed == []
    assert audio == {"artist": ["Real Artist"], "title": ["Song"]}  # untouched


def test_repair_file_fills_missing_but_never_clobbers(monkeypatch):
    # Source artist is a channel name; existing artist must be kept.
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: {"artist": "SomeChannelVEVO", "title": "Channel Decorated Title",
                                     "album": "Real Album", "release_year": 2019})
    audio = _FakeAudio({"artist": ["Correct Artist"], "title": ["Clean Title"]})
    monkeypatch.setattr(mf, "_open_audio", lambda path: (audio, None))
    changed = mf.repair_file(f"X/youtube/x [{YT_ID}].opus", "youtube", dry_run=False)
    assert set(changed) == {"album=Real Album", "date=2019"}
    assert audio["artist"] == ["Correct Artist"]   # NOT overwritten with channel
    assert audio["title"] == ["Clean Title"]        # NOT overwritten with decorated title


def test_repair_file_fills_missing_artist_when_absent(monkeypatch):
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: {"artist": "Real Artist", "title": "T",
                                     "album": "Alb", "release_year": 2020})
    audio = _FakeAudio({})  # nothing present -> fill artist + title too
    monkeypatch.setattr(mf, "_open_audio", lambda path: (audio, None))
    changed = mf.repair_file(f"X/youtube/T [{YT_ID}].opus", "youtube", dry_run=False)
    assert set(changed) == {"album=Alb", "date=2020", "artist=Real Artist", "title=T"}


def test_repair_file_skips_bad_id(monkeypatch):
    called = {"meta": False}
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: called.update(meta=True) or {})
    # last bracket is a descriptor, not a real id
    assert mf.repair_file("X/youtube/Song [Official Video].opus", "youtube", dry_run=False) == []
    assert called["meta"] is False  # never hit the network


def test_repair_file_skips_unparseable(monkeypatch):
    called = {"meta": False}
    monkeypatch.setattr(mf, "run_yt_dlp_get_metadata",
                        lambda url: called.update(meta=True) or {})
    assert mf.repair_file("X/youtube/no-id.opus", "youtube", dry_run=False) == []
    assert called["meta"] is False


# ---- repair_library (real temp tree, repair_file mocked) ----
def test_repair_library_scans_only_source_dirs(tmp_path, monkeypatch):
    root = tmp_path
    (root / "Daft Punk" / "youtube").mkdir(parents=True)
    (root / "Daft Punk" / "youtube" / f"Aerodynamic [{YT_ID}].opus").write_text("x")
    (root / "Daft Punk" / "Discovery").mkdir(parents=True)            # Lidarr album -> skip
    (root / "Daft Punk" / "Discovery" / "Aerodynamic.flac").write_text("x")
    (root / "Ephixa" / "soundcloud").mkdir(parents=True)
    (root / "Ephixa" / "soundcloud" / "Ignomon [123].m4a").write_text("x")

    visited = []
    monkeypatch.setattr(mf, "repair_file",
                        lambda path, source, dry_run: visited.append((source, path)) or ["album=X"])
    scanned, changed = mf.repair_library(str(root), dry_run=False)
    assert scanned == 2 and changed == 2
    assert sorted(s for s, _ in visited) == ["soundcloud", "youtube"]   # album folder skipped


def test_repair_library_missing_root():
    assert mf.repair_library("/no/such/dir", dry_run=False) == (0, 0)