import { config } from "../config/index.js";
import { qdrant } from "./qdrantClient.js";

export async function listDocuments({ limit, offset }) {
  const collectionName = config.qdrant.collection;

  let points;
  try {
    points = await qdrant.scroll(collectionName, {
      limit,
      offset: offset || undefined,
      with_payload: true,
      with_vector: false
    });
  } catch (err) {
    const status = err?.status ?? err?.statusCode ?? err?.response?.status ?? null;
    if (Number(status) === 404) return { items: [], nextOffset: null };
    throw err;
  }

  const items = (points?.points ?? []).map((p) => ({
    id: p.id,
    source: p.payload?.source ?? null,
    title: p.payload?.title ?? null,
    text: p.payload?.text ?? null,
    chunkIndex: p.payload?.chunkIndex ?? null,
    metadata: p.payload?.metadata ?? null
  }));

  const nextOffset = points?.next_page_offset ?? points?.nextPageOffset ?? null;
  return { items, nextOffset };
}

export async function deleteDocumentsBySource(source) {
  const collectionName = config.qdrant.collection;
  await qdrant.delete(collectionName, {
    wait: true,
    filter: {
      must: [{ key: "source", match: { value: source } }]
    }
  });
}