export function parseCanaryUserIds(raw = process.env.GOAL_RUN_CANARY_USER_IDS) {
  return String(raw ?? '')
    .split(/[,;\s]+/)
    .map((item) => item.trim())
    .filter(Boolean);
}

export async function resolveCanaryVerifyUser(pool, {
  usernameFallback = process.env.VERIFY_GOAL_RUN_USER
    ?? process.env.VERIFY_LLM_ROUTER_USER
    ?? 'john2',
} = {}) {
  const canaryIds = parseCanaryUserIds();
  const preferredId = canaryIds[0] ?? null;
  if (preferredId) {
    const [rows] = await pool.query(
      'SELECT id, username FROM h5_users WHERE id = ? LIMIT 1',
      [preferredId],
    );
    if (rows[0]?.id) {
      return {
        userId: String(rows[0].id),
        username: String(rows[0].username ?? usernameFallback),
      };
    }
  }

  const [rows] = await pool.query(
    'SELECT id, username FROM h5_users WHERE username = ? LIMIT 1',
    [usernameFallback],
  );
  if (!rows[0]?.id) return null;
  return {
    userId: String(rows[0].id),
    username: String(rows[0].username ?? usernameFallback),
  };
}