async function ensureFaceScanAutomation(db) {
  const triggerNames = [
    'photos_face_enqueue_insert',
    'photos_face_enqueue_update',
    'photos_face_cleanup_update',
    'photos_face_cleanup_delete',
  ];

  for (const triggerName of triggerNames) {
    await db.raw(
      `DROP TRIGGER IF EXISTS ${triggerName}`,
    );
  }

  await db.raw(`
    CREATE TRIGGER photos_face_enqueue_insert
    AFTER INSERT ON photos
    WHEN
      NEW.deleted_at IS NULL
      AND NEW.path IS NOT NULL
      AND NEW.path != ''
      AND (
        NEW.mime_type IS NULL
        OR NEW.mime_type LIKE 'image/%'
      )
    BEGIN
      INSERT INTO face_scan_jobs (
        photo_id,
        status,
        attempts,
        rescan_requested,
        created_at,
        updated_at
      )
      VALUES (
        NEW.id,
        'pending',
        0,
        0,
        CURRENT_TIMESTAMP,
        CURRENT_TIMESTAMP
      )
      ON CONFLICT(photo_id) DO UPDATE SET
        status = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.status
          ELSE 'pending'
        END,

        rescan_requested = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN 1
          ELSE 0
        END,

        faces_detected = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.faces_detected
          ELSE NULL
        END,

        execution_ms = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.execution_ms
          ELSE NULL
        END,

        applied_rotation = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.applied_rotation
          ELSE NULL
        END,

        last_error = NULL,

        started_at = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.started_at
          ELSE NULL
        END,

        completed_at = NULL,
        updated_at = CURRENT_TIMESTAMP;
    END
  `);

  await db.raw(`
    CREATE TRIGGER photos_face_enqueue_update
    AFTER UPDATE OF
      path,
      fast_hash,
      mtimeMs,
      size_bytes,
      rotation,
      mime_type,
      deleted_at
    ON photos
    WHEN
      NEW.deleted_at IS NULL
      AND NEW.path IS NOT NULL
      AND NEW.path != ''
      AND (
        NEW.mime_type IS NULL
        OR NEW.mime_type LIKE 'image/%'
      )
      AND (
        OLD.path IS NOT NEW.path
        OR OLD.fast_hash IS NOT NEW.fast_hash
        OR OLD.mtimeMs IS NOT NEW.mtimeMs
        OR OLD.size_bytes IS NOT NEW.size_bytes
        OR OLD.rotation IS NOT NEW.rotation
        OR OLD.mime_type IS NOT NEW.mime_type
        OR OLD.deleted_at IS NOT NEW.deleted_at
      )
    BEGIN
      INSERT INTO face_scan_jobs (
        photo_id,
        status,
        attempts,
        rescan_requested,
        created_at,
        updated_at
      )
      VALUES (
        NEW.id,
        'pending',
        0,
        0,
        CURRENT_TIMESTAMP,
        CURRENT_TIMESTAMP
      )
      ON CONFLICT(photo_id) DO UPDATE SET
        status = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.status
          ELSE 'pending'
        END,

        rescan_requested = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN 1
          ELSE 0
        END,

        faces_detected = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.faces_detected
          ELSE NULL
        END,

        execution_ms = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.execution_ms
          ELSE NULL
        END,

        applied_rotation = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.applied_rotation
          ELSE NULL
        END,

        last_error = NULL,

        started_at = CASE
          WHEN face_scan_jobs.status = 'processing'
          THEN face_scan_jobs.started_at
          ELSE NULL
        END,

        completed_at = NULL,
        updated_at = CURRENT_TIMESTAMP;
    END
  `);

  await db.raw(`
    CREATE TRIGGER photos_face_cleanup_update
    AFTER UPDATE OF
      path,
      mime_type,
      deleted_at
    ON photos
    WHEN
      NEW.deleted_at IS NOT NULL
      OR NEW.path IS NULL
      OR NEW.path = ''
      OR (
        NEW.mime_type IS NOT NULL
        AND NEW.mime_type NOT LIKE 'image/%'
      )
    BEGIN
      DELETE FROM faces
      WHERE photo_id = NEW.id;

      DELETE FROM face_scan_jobs
      WHERE photo_id = NEW.id;
    END
  `);

  await db.raw(`
    CREATE TRIGGER photos_face_cleanup_delete
    AFTER DELETE ON photos
    BEGIN
      DELETE FROM faces
      WHERE photo_id = OLD.id;

      DELETE FROM face_scan_jobs
      WHERE photo_id = OLD.id;
    END
  `);

  console.log(
    '✔ trigger automatici scansione volti creati',
  );
}

module.exports = {
  ensureFaceScanAutomation,
};