feat(lidarr): exact MBID album lookup via MusicBrainz resolution

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

musicfetch

@@ -200,38 +200,70 @@ def _split_query(query: str) -> tuple[str, Optional[str]]:
 
 
 def lidarr_search(query: str, limit: int) -> list[Hit]:
-    """Universal search via /api/v1/search; fall back to album+artist lookup."""
+    """Return Lidarr hits, best match first. Resolves 'Artist - Track' to an
+    album's MusicBrainz release-group MBID, then does an exact Lidarr lookup
+    (term=mbid:<id>) — no fuzzy ranking. Falls back so it never raises and
+    returns [] only on total failure / missing key."""
     if not API_KEY:
         err("LIDARR_API_KEY not set — skipping Lidarr search.")
         return []
+
+    artist, right = _split_query(query)
+
+    if right:
+        mb = musicbrainz_best_album(artist, right)
+        if mb and mb["rg_mbid"]:
+            hits = _lidarr_album_candidates(f"mbid:{mb['rg_mbid']}")
+            for h in hits:
+                if not h.year and mb["year"]:
+                    h.year = mb["year"]
+            if hits:
+                return hits[:limit]
+        # MusicBrainz miss / no exact album → plain lookup (album-first: a dash
+        # query named an album/track).
+        return _fallback_lookup(query, limit, artist_first=False)
+
+    # Bare term is most often an artist.
+    return _fallback_lookup(query, limit, artist_first=True)
+
+
+def _lidarr_album_candidates(term: str) -> list[Hit]:
+    try:
+        return [_album_to_hit(a) for a in lidarr_get("/api/v1/album/lookup", params={"term": term})]
+    except RequestException as e:
+        dbg(f"album/lookup failed: {e}")
+        return []
+
+
+def _lidarr_artist_candidates(term: str) -> list[Hit]:
+    try:
+        return [_artist_to_hit(a) for a in lidarr_get("/api/v1/artist/lookup", params={"term": term})]
+    except RequestException as e:
+        dbg(f"artist/lookup failed: {e}")
+        return []
+
+
+def _fallback_lookup(query: str, limit: int, artist_first: bool) -> list[Hit]:
+    """Plain album + artist lookups (no scoring); /search as last resort."""
+    albums = _lidarr_album_candidates(query)
+    artists = _lidarr_artist_candidates(query)
+    hits = (artists + albums) if artist_first else (albums + artists)
+    if hits:
+        return hits[:limit]
+    return _universal_search(query, limit)
+
+
+def _universal_search(query: str, limit: int) -> list[Hit]:
+    """Last resort: Lidarr's fuzzy /search (unranked)."""
     hits: list[Hit] = []
     try:
-        results = lidarr_get("/api/v1/search", params={"term": query})
-        for item in results:
-            # /search returns objects with 'foreignId' and either 'album' or 'artist'.
+        for item in lidarr_get("/api/v1/search", params={"term": query}):
             if item.get("album"):
                 hits.append(_album_to_hit(item["album"]))
             elif item.get("artist"):
                 hits.append(_artist_to_hit(item["artist"]))
-        if hits:
-            return hits[:limit]
-        dbg("/api/v1/search returned nothing useful; trying lookup endpoints.")
-    except Timeout:
-        err("Lidarr universal search timed out.")
     except RequestException as e:
-        dbg(f"/api/v1/search unavailable ({e}); falling back to lookup endpoints.")
-
-    # Fallback: album lookup then artist lookup.
-    try:
-        for album in lidarr_get("/api/v1/album/lookup", params={"term": query}):
-            hits.append(_album_to_hit(album))
-    except RequestException as e:
-        dbg(f"album/lookup failed: {e}")
-    try:
-        for artist in lidarr_get("/api/v1/artist/lookup", params={"term": query}):
-            hits.append(_artist_to_hit(artist))
-    except RequestException as e:
-        dbg(f"artist/lookup failed: {e}")
+        dbg(f"/api/v1/search failed: {e}")
     return hits[:limit]
 
 

tests/test_lidarr_search.py

@@ -0,0 +1,83 @@
+import server.mf  # noqa: F401
+import musicfetch_core as mf
+
+DISCOVERY_MBID = "48117b90-a16e-34ca-a514-19c702df1158"
+
+DISCOVERY_ALBUM = {"title": "Discovery", "artist": {"artistName": "Daft Punk"},
+                   "releaseDate": "2001-01-01", "foreignAlbumId": DISCOVERY_MBID}
+
+
+def test_artist_track_uses_mbid_exact_lookup(monkeypatch):
+    monkeypatch.setattr(mf, "API_KEY", "testkey")
+    monkeypatch.setattr(mf, "musicbrainz_best_album",
+                        lambda artist, track: {"album_title": "Discovery", "artist": "Daft Punk",
+                                               "year": "2001", "rg_mbid": DISCOVERY_MBID})
+    seen = {}
+
+    def fake_get(path, params=None, timeout=15):
+        seen["term"] = (params or {}).get("term")
+        if path == "/api/v1/album/lookup" and seen["term"] == f"mbid:{DISCOVERY_MBID}":
+            return [DISCOVERY_ALBUM]
+        return []
+    monkeypatch.setattr(mf, "lidarr_get", fake_get)
+
+    hits = mf.lidarr_search("Daft Punk - Harder Better Faster Stronger", 10)
+    assert seen["term"] == f"mbid:{DISCOVERY_MBID}"
+    assert hits[0].album == "Discovery"
+    assert hits[0].artist == "Daft Punk"
+    assert hits[0].payload["album"]["foreignAlbumId"] == DISCOVERY_MBID
+
+
+def test_year_enriched_from_musicbrainz(monkeypatch):
+    monkeypatch.setattr(mf, "API_KEY", "testkey")
+    monkeypatch.setattr(mf, "musicbrainz_best_album",
+                        lambda artist, track: {"album_title": "Discovery", "artist": "Daft Punk",
+                                               "year": "2001", "rg_mbid": DISCOVERY_MBID})
+    no_year = [{"title": "Discovery", "artist": {"artistName": "Daft Punk"},
+                "releaseDate": "", "foreignAlbumId": DISCOVERY_MBID}]
+    monkeypatch.setattr(mf, "lidarr_get",
+                        lambda path, params=None, timeout=15: no_year if path == "/api/v1/album/lookup" else [])
+    hits = mf.lidarr_search("Daft Punk - Discovery", 10)
+    assert hits[0].year == "2001"
+
+
+def test_no_api_key_returns_empty(monkeypatch):
+    monkeypatch.setattr(mf, "API_KEY", "")
+    assert mf.lidarr_search("Daft Punk - Discovery", 10) == []
+
+
+def test_mb_miss_falls_back_to_lookup(monkeypatch):
+    monkeypatch.setattr(mf, "API_KEY", "testkey")
+    monkeypatch.setattr(mf, "musicbrainz_best_album", lambda artist, track: None)
+    monkeypatch.setattr(mf, "lidarr_get",
+                        lambda path, params=None, timeout=15: [DISCOVERY_ALBUM] if path == "/api/v1/album/lookup" else [])
+    hits = mf.lidarr_search("Daft Punk - Discovery", 10)
+    assert hits[0].album == "Discovery"
+
+
+def test_single_term_is_artist_first(monkeypatch):
+    monkeypatch.setattr(mf, "API_KEY", "testkey")
+
+    def fake_get(path, params=None, timeout=15):
+        if path == "/api/v1/artist/lookup":
+            return [{"artistName": "Daft Punk"}]
+        if path == "/api/v1/album/lookup":
+            return [DISCOVERY_ALBUM]
+        return []
+    monkeypatch.setattr(mf, "lidarr_get", fake_get)
+    hits = mf.lidarr_search("Daft Punk", 10)
+    assert hits[0].kind == "artist"
+    assert hits[0].artist == "Daft Punk"
+
+
+def test_last_resort_universal_search(monkeypatch):
+    monkeypatch.setattr(mf, "API_KEY", "testkey")
+    monkeypatch.setattr(mf, "musicbrainz_best_album", lambda artist, track: None)
+
+    def fake_get(path, params=None, timeout=15):
+        if path == "/api/v1/search":
+            return [{"album": DISCOVERY_ALBUM}]
+        return []
+    monkeypatch.setattr(mf, "lidarr_get", fake_get)
+    hits = mf.lidarr_search("Daft Punk - Discovery", 10)
+    assert hits and hits[0].album == "Discovery"