addDatasetEntry function exported ✓ 100.0%

export async function addDatasetEntry(
  entry: Omit<DatasetEntry, "id" | "createdAt">,
): Promise<DatasetEntry | null> {
  const normalized = normalise(entry.signals);
  if (!normalized) {
    log.warn(
      "addDatasetEntry: signals está vazio após normalização — ignorando",
    );
    return null;
  }

  const existing = await getDatasetEntries();

  const dupIdx = existing.findIndex(
    (e) => e.signals === normalized && e.type === entry.type,
  );

  const newEntry: DatasetEntry =
    dupIdx >= 0
      ? {
          ...existing[dupIdx],
          source: entry.source,
          difficulty: entry.difficulty,
          createdAt: Date.now(),
        }
      : {
          id: generateId(),
          signals: normalized,
          type: entry.type,
          source: entry.source,
          difficulty: entry.difficulty,
          createdAt: Date.now(),
        };

  const updated =
    dupIdx >= 0
      ? existing.map((e, i) => (i === dupIdx ? newEntry : e))
      : [...existing, newEntry];

  await chrome.storage.local.set({ [RUNTIME_DATASET_KEY]: updated });
  return newEntry;
}