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

package dbq

import (
	"context"

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

const deleteTrackFingerprint = `-- name: DeleteTrackFingerprint :exec
DELETE FROM track_fingerprints WHERE track_id = $1
`

// A file changed but could not be fingerprinted, for a reason unrelated to the
// file. The stored row describes the OLD bytes, so it goes and the backfill
// re-derives it — nothing may keep trusting a stale identity.
func (q *Queries) DeleteTrackFingerprint(ctx context.Context, trackID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteTrackFingerprint, trackID)
	return err
}

const getFingerprintCoverage = `-- name: GetFingerprintCoverage :one
SELECT count(*)::bigint AS total,
       count(*) FILTER (
           WHERE f.fingerprint_version >= $1
             AND f.chromaprint_length_sec = $2
             AND f.audio_stream_sha256 IS NOT NULL AND f.chromaprint IS NOT NULL
       )::bigint AS fingerprinted,
       count(*) FILTER (
           WHERE f.fingerprint_version >= $1
             AND f.chromaprint_length_sec = $2
             AND (f.audio_stream_sha256 IS NULL OR f.chromaprint IS NULL)
       )::bigint AS rejected,
       count(*) FILTER (
           WHERE f.track_id IS NULL
              OR f.fingerprint_version < $1
              OR f.chromaprint_length_sec <> $2
       )::bigint AS pending
  FROM tracks t
  LEFT JOIN track_fingerprints f ON f.track_id = t.id
 WHERE t.missing_since IS NULL
`

type GetFingerprintCoverageParams struct {
	CurrentVersion       int16
	ChromaprintLengthSec int32
}

type GetFingerprintCoverageRow struct {
	Total         int64
	Fingerprinted int64
	Rejected      int64
	Pending       int64
}

// The admin gauge for the backfill. fingerprinted + rejected + pending = total.
// "Current" means derived by the current method AT the current length: a row at
// another length is pending, because the backfill will re-derive it. rejected is
// a current row with a NULL half: a tool ran and refused the file, which is
// settled rather than waiting. Missing tracks are excluded, or the gauge could
// never reach the end.
func (q *Queries) GetFingerprintCoverage(ctx context.Context, arg GetFingerprintCoverageParams) (GetFingerprintCoverageRow, error) {
	row := q.db.QueryRow(ctx, getFingerprintCoverage, arg.CurrentVersion, arg.ChromaprintLengthSec)
	var i GetFingerprintCoverageRow
	err := row.Scan(
		&i.Total,
		&i.Fingerprinted,
		&i.Rejected,
		&i.Pending,
	)
	return i, err
}

const listTracksNeedingFingerprint = `-- name: ListTracksNeedingFingerprint :many
SELECT t.id, t.file_path
  FROM tracks t
  LEFT JOIN track_fingerprints f ON f.track_id = t.id
 WHERE t.missing_since IS NULL
   -- A row taken at another length is as stale as one from an older method:
   -- chromaprints at two lengths cannot be compared (#3913).
   AND (f.track_id IS NULL
        OR f.fingerprint_version < $1
        OR f.chromaprint_length_sec <> $2)
   AND t.id > $3
 ORDER BY t.id
 LIMIT $4
`

type ListTracksNeedingFingerprintParams struct {
	CurrentVersion       int16
	ChromaprintLengthSec int32
	AfterID              pgtype.UUID
	BatchLimit           int32
}

type ListTracksNeedingFingerprintRow struct {
	ID       pgtype.UUID
	FilePath string
}

// The backfill's work queue (#3908): tracks with no fingerprint, or one derived
// by an older method. Keyset-paged on id so a pass visits each track at most
// once. That cursor is load-bearing: an inconclusive attempt writes no row, so
// without it a file that keeps timing out would be listed again straight away
// and retried in a tight loop. Missing tracks are skipped — there is no file to
// read.
func (q *Queries) ListTracksNeedingFingerprint(ctx context.Context, arg ListTracksNeedingFingerprintParams) ([]ListTracksNeedingFingerprintRow, error) {
	rows, err := q.db.Query(ctx, listTracksNeedingFingerprint,
		arg.CurrentVersion,
		arg.ChromaprintLengthSec,
		arg.AfterID,
		arg.BatchLimit,
	)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []ListTracksNeedingFingerprintRow
	for rows.Next() {
		var i ListTracksNeedingFingerprintRow
		if err := rows.Scan(&i.ID, &i.FilePath); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const upsertTrackFingerprint = `-- name: UpsertTrackFingerprint :exec
INSERT INTO track_fingerprints (
    track_id, audio_stream_sha256, chromaprint, fingerprint_version, chromaprint_length_sec
) VALUES (
    $1, $2, $3,
    $4, $5
)
ON CONFLICT (track_id) DO UPDATE SET
    audio_stream_sha256    = EXCLUDED.audio_stream_sha256,
    chromaprint            = EXCLUDED.chromaprint,
    fingerprint_version    = EXCLUDED.fingerprint_version,
    chromaprint_length_sec = EXCLUDED.chromaprint_length_sec,
    computed_at            = now()
`

type UpsertTrackFingerprintParams struct {
	TrackID              pgtype.UUID
	AudioStreamSha256    []byte
	Chromaprint          []int32
	FingerprintVersion   int16
	ChromaprintLengthSec int32
}

// Written whenever a track's fingerprint is derived: by the scan when a file is
// new or its bytes changed, and by the backfill (#3908) for rows derived by an
// older method. Replaces the row wholesale — a fingerprint of the old bytes has
// no standing once the file has changed.
func (q *Queries) UpsertTrackFingerprint(ctx context.Context, arg UpsertTrackFingerprintParams) error {
	_, err := q.db.Exec(ctx, upsertTrackFingerprint,
		arg.TrackID,
		arg.AudioStreamSha256,
		arg.Chromaprint,
		arg.FingerprintVersion,
		arg.ChromaprintLengthSec,
	)
	return err
}