// Code generated by sqlc. DO NOT EDIT.
// versions:
//   sqlc v1.31.1
// source: similarity.sql

package dbq

import (
	"context"

	"github.com/jackc/pgx/v5/pgtype"
)

const deleteSimilarRecordingsForSeed = `-- name: DeleteSimilarRecordingsForSeed :exec
DELETE FROM listenbrainz_similar_recordings WHERE seed_track_id = $1
`

// A fetch replaces the seed's cached answer whole.
func (q *Queries) DeleteSimilarRecordingsForSeed(ctx context.Context, seedTrackID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteSimilarRecordingsForSeed, seedTrackID)
	return err
}

const getArtistsByMBIDs = `-- name: GetArtistsByMBIDs :many
SELECT id, mbid FROM artists WHERE mbid = ANY($1::text[])
`

type GetArtistsByMBIDsRow struct {
	ID   pgtype.UUID
	Mbid *string
}

func (q *Queries) GetArtistsByMBIDs(ctx context.Context, dollar_1 []string) ([]GetArtistsByMBIDsRow, error) {
	rows, err := q.db.Query(ctx, getArtistsByMBIDs, dollar_1)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []GetArtistsByMBIDsRow
	for rows.Next() {
		var i GetArtistsByMBIDsRow
		if err := rows.Scan(&i.ID, &i.Mbid); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const insertSimilarRecordings = `-- name: InsertSimilarRecordings :exec
INSERT INTO listenbrainz_similar_recordings (seed_track_id, recording_mbid, score)
SELECT $1::uuid, r.mbid, max(r.score)
FROM (SELECT unnest($2::text[]) AS mbid,
             unnest($3::float8[]) AS score) r
WHERE r.mbid <> ''
GROUP BY r.mbid
`

type InsertSimilarRecordingsParams struct {
	SeedTrackID pgtype.UUID
	Mbids       []string
	Scores      []float64
}

// The seed's whole answer, in or out of the library. An MBID LB lists twice
// keeps its best score.
func (q *Queries) InsertSimilarRecordings(ctx context.Context, arg InsertSimilarRecordingsParams) error {
	_, err := q.db.Exec(ctx, insertSimilarRecordings, arg.SeedTrackID, arg.Mbids, arg.Scores)
	return err
}

const listPlayedArtistsNeedingSimilarity = `-- name: ListPlayedArtistsNeedingSimilarity :many
SELECT ar.id, ar.mbid
FROM artists ar
LEFT JOIN artist_similarity_fetches f ON f.artist_id = ar.id
WHERE ar.mbid IS NOT NULL
  AND EXISTS (
      SELECT 1 FROM tracks t
      JOIN play_events pe ON pe.track_id = t.id
      WHERE t.artist_id = ar.id
  )
  AND (f.artist_id IS NULL OR f.fetched_at < now() - interval '30 days')
ORDER BY f.fetched_at NULLS FIRST, ar.id
LIMIT $1
`

type ListPlayedArtistsNeedingSimilarityRow struct {
	ID   pgtype.UUID
	Mbid *string
}

// The artist queue, with the same shape and the same reason.
func (q *Queries) ListPlayedArtistsNeedingSimilarity(ctx context.Context, limit int32) ([]ListPlayedArtistsNeedingSimilarityRow, error) {
	rows, err := q.db.Query(ctx, listPlayedArtistsNeedingSimilarity, limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []ListPlayedArtistsNeedingSimilarityRow
	for rows.Next() {
		var i ListPlayedArtistsNeedingSimilarityRow
		if err := rows.Scan(&i.ID, &i.Mbid); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listPlayedTracksNeedingSimilarity = `-- name: ListPlayedTracksNeedingSimilarity :many
SELECT t.id, t.mbid
FROM tracks t
LEFT JOIN track_similarity_fetches f ON f.track_id = t.id
WHERE t.mbid IS NOT NULL
  AND t.missing_since IS NULL
  AND EXISTS (SELECT 1 FROM play_events pe WHERE pe.track_id = t.id)
  AND (f.track_id IS NULL OR f.fetched_at < now() - interval '30 days')
ORDER BY f.fetched_at NULLS FIRST, t.id
LIMIT $1
`

type ListPlayedTracksNeedingSimilarityRow struct {
	ID   pgtype.UUID
	Mbid *string
}

// The worker's track queue: played, present tracks with a recording MBID that
// ListenBrainz has never answered for, or not in 30 days. Never-fetched first,
// then the oldest answer. Freshness is read from track_similarity_fetches, not
// from the edges, so a seed whose answer matched nothing in the library still
// counts as fetched (#5296); reading the edges is what let 25 such seeds hold
// the head of the queue forever.
func (q *Queries) ListPlayedTracksNeedingSimilarity(ctx context.Context, limit int32) ([]ListPlayedTracksNeedingSimilarityRow, error) {
	rows, err := q.db.Query(ctx, listPlayedTracksNeedingSimilarity, limit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []ListPlayedTracksNeedingSimilarityRow
	for rows.Next() {
		var i ListPlayedTracksNeedingSimilarityRow
		if err := rows.Scan(&i.ID, &i.Mbid); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listSimilarArtistsForArtist = `-- name: ListSimilarArtistsForArtist :many
SELECT artists.id, artists.name, artists.sort_name, artists.mbid, artists.created_at, artists.updated_at, artists.artist_thumb_path, artists.artist_fanart_path, artists.artist_art_source, artists.artist_art_sources_version,
       cov.id AS cover_album_id,
       cnt.album_count::bigint AS album_count
FROM (
    SELECT artist_b_id, max(score) AS sim_score
    FROM artist_similarity
    WHERE artist_a_id = $1
    GROUP BY artist_b_id
) s
JOIN artists ON artists.id = s.artist_b_id
LEFT JOIN LATERAL (
    SELECT id FROM albums
    WHERE artist_id = artists.id AND cover_art_path IS NOT NULL
    ORDER BY created_at DESC LIMIT 1
) cov ON true
LEFT JOIN LATERAL (
    SELECT count(*) AS album_count
    FROM albums WHERE artist_id = artists.id
) cnt ON true
ORDER BY s.sim_score DESC, artists.sort_name
LIMIT $2
`

type ListSimilarArtistsForArtistParams struct {
	SeedArtistID pgtype.UUID
	ResultLimit  int32
}

type ListSimilarArtistsForArtistRow struct {
	Artist       Artist
	CoverAlbumID pgtype.UUID
	AlbumCount   int64
}

// In-library artists similar to a seed artist, ranked by best similarity
// score across sources (deduped per candidate). cover_album_id + album_count
// mirror ListArtistsAlphaWithCovers so the strip renders identical cards.
func (q *Queries) ListSimilarArtistsForArtist(ctx context.Context, arg ListSimilarArtistsForArtistParams) ([]ListSimilarArtistsForArtistRow, error) {
	rows, err := q.db.Query(ctx, listSimilarArtistsForArtist, arg.SeedArtistID, arg.ResultLimit)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []ListSimilarArtistsForArtistRow
	for rows.Next() {
		var i ListSimilarArtistsForArtistRow
		if err := rows.Scan(
			&i.Artist.ID,
			&i.Artist.Name,
			&i.Artist.SortName,
			&i.Artist.Mbid,
			&i.Artist.CreatedAt,
			&i.Artist.UpdatedAt,
			&i.Artist.ArtistThumbPath,
			&i.Artist.ArtistFanartPath,
			&i.Artist.ArtistArtSource,
			&i.Artist.ArtistArtSourcesVersion,
			&i.CoverAlbumID,
			&i.AlbumCount,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const recordArtistSimilarityFetch = `-- name: RecordArtistSimilarityFetch :exec
INSERT INTO artist_similarity_fetches (artist_id, fetched_at, returned)
VALUES ($1, now(), $2)
ON CONFLICT (artist_id) DO UPDATE SET fetched_at = now(), returned = EXCLUDED.returned
`

type RecordArtistSimilarityFetchParams struct {
	ArtistID pgtype.UUID
	Returned int32
}

func (q *Queries) RecordArtistSimilarityFetch(ctx context.Context, arg RecordArtistSimilarityFetchParams) error {
	_, err := q.db.Exec(ctx, recordArtistSimilarityFetch, arg.ArtistID, arg.Returned)
	return err
}

const recordTrackSimilarityFetch = `-- name: RecordTrackSimilarityFetch :exec
INSERT INTO track_similarity_fetches (track_id, fetched_at, returned)
VALUES ($1, now(), $2)
ON CONFLICT (track_id) DO UPDATE SET fetched_at = now(), returned = EXCLUDED.returned
`

type RecordTrackSimilarityFetchParams struct {
	TrackID  pgtype.UUID
	Returned int32
}

func (q *Queries) RecordTrackSimilarityFetch(ctx context.Context, arg RecordTrackSimilarityFetchParams) error {
	_, err := q.db.Exec(ctx, recordTrackSimilarityFetch, arg.TrackID, arg.Returned)
	return err
}

const resolveListenBrainzTrackEdges = `-- name: ResolveListenBrainzTrackEdges :exec
WITH want AS (
    SELECT DISTINCT ON (c.seed_track_id, c.recording_mbid)
           c.seed_track_id AS track_a_id, t.id AS track_b_id, c.score
    FROM listenbrainz_similar_recordings c
    JOIN tracks t ON t.mbid = c.recording_mbid
                 AND t.missing_since IS NULL
                 AND t.id <> c.seed_track_id
    WHERE $1::uuid[] IS NULL
       OR c.seed_track_id = ANY($1::uuid[])
    ORDER BY c.seed_track_id, c.recording_mbid, t.id
),
upserted AS (
    INSERT INTO track_similarity (track_a_id, track_b_id, score, source, fetched_at)
    SELECT track_a_id, track_b_id, score, 'listenbrainz', now() FROM want
    ON CONFLICT (track_a_id, track_b_id, source) DO UPDATE
        SET score = EXCLUDED.score, fetched_at = EXCLUDED.fetched_at
        WHERE track_similarity.score IS DISTINCT FROM EXCLUDED.score
    RETURNING 1
)
DELETE FROM track_similarity ts
WHERE ts.source = 'listenbrainz'
  AND ($1::uuid[] IS NULL OR ts.track_a_id = ANY($1::uuid[]))
  AND EXISTS (SELECT 1 FROM track_similarity_fetches f WHERE f.track_id = ts.track_a_id)
  AND NOT EXISTS (
      SELECT 1 FROM want w
      WHERE w.track_a_id = ts.track_a_id AND w.track_b_id = ts.track_b_id
  )
`

// Derives the listenbrainz edges in track_similarity from the cached answers:
// every cached recording that is a present track in the library becomes an
// edge, whenever it got there. Scoped to the given seeds, or every seed when
// seed_ids is NULL.
//
// One track per recording MBID: two copies of a song (an mp3 beside its flac,
// or one recording on two releases) would otherwise be two candidates, and the
// pool would offer the same song twice. No cap per seed: LB's answer is already
// at most 50.
//
// Only edges of seeds the cache owns are removed, those with a fetch row.
// Edges written before the cache existed, or copied onto a survivor by a fold
// (merge.sql), stay until their seed is fetched.
func (q *Queries) ResolveListenBrainzTrackEdges(ctx context.Context, seedIds []pgtype.UUID) error {
	_, err := q.db.Exec(ctx, resolveListenBrainzTrackEdges, seedIds)
	return err
}

const upsertArtistSimilarity = `-- name: UpsertArtistSimilarity :exec
INSERT INTO artist_similarity (artist_a_id, artist_b_id, score, source, fetched_at)
VALUES ($1, $2, $3, 'listenbrainz', now())
ON CONFLICT (artist_a_id, artist_b_id, source)
DO UPDATE SET score = EXCLUDED.score, fetched_at = EXCLUDED.fetched_at
`

type UpsertArtistSimilarityParams struct {
	ArtistAID pgtype.UUID
	ArtistBID pgtype.UUID
	Score     float64
}

func (q *Queries) UpsertArtistSimilarity(ctx context.Context, arg UpsertArtistSimilarityParams) error {
	_, err := q.db.Exec(ctx, upsertArtistSimilarity, arg.ArtistAID, arg.ArtistBID, arg.Score)
	return err
}

const upsertArtistSimilarityUnmatched = `-- name: UpsertArtistSimilarityUnmatched :exec
INSERT INTO artist_similarity_unmatched (
    seed_artist_id, candidate_mbid, candidate_name, score, source
) VALUES ($1, $2, $3, $4, $5)
ON CONFLICT (seed_artist_id, candidate_mbid, source) DO UPDATE SET
    candidate_name = EXCLUDED.candidate_name,
    score          = EXCLUDED.score,
    fetched_at     = now()
`

type UpsertArtistSimilarityUnmatchedParams struct {
	SeedArtistID  pgtype.UUID
	CandidateMbid string
	CandidateName string
	Score         float64
	Source        string
}

// Persists an out-of-library similar-artist MBID. Idempotent on
// (seed_artist_id, candidate_mbid, source) — re-fetches refresh the
// name/score and bump fetched_at.
func (q *Queries) UpsertArtistSimilarityUnmatched(ctx context.Context, arg UpsertArtistSimilarityUnmatchedParams) error {
	_, err := q.db.Exec(ctx, upsertArtistSimilarityUnmatched,
		arg.SeedArtistID,
		arg.CandidateMbid,
		arg.CandidateName,
		arg.Score,
		arg.Source,
	)
	return err
}