-- Taste profile (#796 phase 1). The daily build computes signed artist/tag
-- weights in Go (graded engagement + decay + like bonus) and atomic-replaces
-- them here. Read queries serve "top taste" lookups (used in phase 2).

-- name: ListPlayEngagementInputsForUser :many
-- One row per play in the decay-relevant window. completion is the play's
-- completion ratio (precomputed column when present, else duration_played /
-- track duration, clamped to [0,1]); age_days drives the time-decay. Genre
-- is split into tags in Go. Quarantined tracks are excluded.
SELECT
    t.id AS track_id,
    t.artist_id,
    t.genre,
    LEAST(GREATEST(
        COALESCE(pe.completion_ratio,
                 pe.duration_played_ms::float8 / NULLIF(t.duration_ms, 0),
                 0), 0), 1)::float8 AS completion,
    (EXTRACT(epoch FROM now() - pe.started_at) / 86400.0)::float8 AS age_days
FROM play_events pe
JOIN tracks t ON t.id = pe.track_id
WHERE pe.user_id = $1
  AND pe.started_at > now() - ($2::float8 * INTERVAL '1 day')
  AND NOT EXISTS (
      SELECT 1 FROM lidarr_quarantine q
      WHERE q.user_id = $1 AND q.track_id = t.id
  );

-- name: ListLikedTrackTasteInputsForUser :many
-- (track_id, artist_id, genre) for each track the user has explicitly
-- liked. Feeds the track-like bonus into the liked track's artist and
-- tags; track_id keys the enriched track_tags lookup (#1490).
SELECT t.id AS track_id, t.artist_id, t.genre
FROM general_likes gl
JOIN tracks t ON t.id = gl.track_id
WHERE gl.user_id = $1;

-- name: ListLikedArtistIDsForUser :many
-- Artists the user has explicitly liked; feeds the artist-like bonus.
SELECT artist_id FROM general_likes_artists WHERE user_id = $1;

-- name: DeleteTasteProfileArtistsForUser :exec
DELETE FROM taste_profile_artists WHERE user_id = $1;

-- name: InsertTasteProfileArtist :exec
INSERT INTO taste_profile_artists (user_id, artist_id, weight)
VALUES ($1, $2, $3);

-- name: DeleteTasteProfileTagsForUser :exec
DELETE FROM taste_profile_tags WHERE user_id = $1;

-- name: InsertTasteProfileTag :exec
INSERT INTO taste_profile_tags (user_id, tag, weight)
VALUES ($1, $2, $3);

-- name: ListTasteProfileArtistsForUser :many
-- Top-weighted taste artists (phase-2 consumption + tests).
SELECT artist_id, weight
FROM taste_profile_artists
WHERE user_id = $1
ORDER BY weight DESC
LIMIT $2;

-- name: ListTasteProfileTagsForUser :many
SELECT tag, weight
FROM taste_profile_tags
WHERE user_id = $1
ORDER BY weight DESC
LIMIT $2;
