import { LIST_BY_ENTITY_AND_SKUS } from '../../sql/articlesupplier.js';
import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
import { assertSupplier } from './helpers.js';

function parseJsonArray(raw) {
  if (!raw) return [];
  try {
    const val = typeof raw === 'string' ? JSON.parse(raw) : raw;
    return Array.isArray(val) ? val : [];
  } catch {
    return [];
  }
}

export default function listByEntityAndSkus(pool) {
  const resolveAccess = resolveSelectedCompanyAccess(pool);

  /**
   * Lists article-supplier assignments for a given supplier (entityId) and SKU list,
   * including linked article details (name, slug, photos/articlepic, eans/articleean).
   *
   * @param {number} googleAuthId - The id of the Google auth user.
   * @param {number|{entityId?: number, supplierId?: number, skus?: string[]|string}} entityIdOrOptions - The supplier entity id or an options object.
   * @param {string[]|string} [maybeSkus] - The list of SKUs to filter by (or single SKU string).
   * @returns {Promise<Array<{id: number, articleId: number, entityId: number, supplierName: string|null, sku: string|null, pu: number, stock: number|null, sort: number, priceId: number|null, price: {net: number, taxId: number, taxRate?: number}|null, article: {id: number, sku: string, name: string|null, slug: string|null, photos: Array<{sort: number, thumbhash: string, hash: string, thumbw: number, thumbh: number}>, articlepic: Array<{sort: number, thumbhash: string, hash: string, thumbw: number, thumbh: number}>, eans: string[], articleean: string[]}}>>} The supplier assignments with article details.
   * @throws {Error} If user is not authorized, entityId is missing, or supplier does not exist.
   *
   * @example
   * const items = await store.articlesupplier.listByEntityAndSkus(42, 5, ['SKU-1', 'SKU-2']);
   * // => [{ id, articleId, entityId, supplierName, sku, pu, stock, sort, price, article: { id, sku, name, slug, photos, eans } }]
   */
  return async (googleAuthId, entityIdOrOptions, maybeSkus) => {
    let entityId;
    let skus;

    if (
      typeof entityIdOrOptions === 'object' &&
      entityIdOrOptions !== null &&
      !Array.isArray(entityIdOrOptions)
    ) {
      entityId = entityIdOrOptions.entityId ?? entityIdOrOptions.supplierId;
      skus = entityIdOrOptions.skus;
    } else {
      entityId = entityIdOrOptions;
      skus = maybeSkus;
    }

    if (entityId == null || !Number.isFinite(Number(entityId))) {
      throw new Error('Supplier required');
    }
    const parsedEntityId = Number(entityId);

    // Fast return if an empty array of skus was explicitly requested
    if (Array.isArray(skus) && skus.length === 0) {
      return [];
    }

    let skusJson = null;
    if (skus != null) {
      const rawList = Array.isArray(skus) ? skus : [skus];
      const cleanList = rawList
        .map((s) => (s == null ? '' : String(s).trim()))
        .filter(Boolean);

      if (cleanList.length === 0) {
        return [];
      }
      skusJson = JSON.stringify(Array.from(new Set(cleanList)));
    }

    const { companyId, languageId } = await resolveAccess(googleAuthId);

    await assertSupplier(pool, null, companyId, parsedEntityId);

    const result = await pool
      .request()
      .input('entityId', parsedEntityId)
      .input('companyId', companyId)
      .input('languageId', languageId)
      .input('skusJson', skusJson)
      .query(LIST_BY_ENTITY_AND_SKUS);

    return result.recordset.map((row) => {
      const rawPhotos = parseJsonArray(row.photosJson);
      const photos = rawPhotos.map((p) => ({
        sort: p.sort,
        thumbhash: p.thumbhash,
        hash: p.hash,
        thumbw: p.thumbw,
        thumbh: p.thumbh,
        thumbHash: p.thumbhash,
        fullHash: p.hash,
        thumbW: p.thumbw,
        thumbH: p.thumbh,
      }));

      const eans = parseJsonArray(row.eansJson).map((r) => r.ean);

      return {
        id: row.id,
        articleId: row.articleId,
        entityId: row.entityId,
        supplierName: row.supplierName ?? null,
        sku: row.sku ?? null,
        pu: row.pu,
        stock: row.stock ?? null,
        sort: row.sort,
        priceId: row.priceId ?? null,
        price:
          row.priceId != null && row.priceNet != null
            ? {
                net: row.priceNet,
                taxId: row.priceTaxId,
                ...(row.priceTaxRate != null ? { taxRate: row.priceTaxRate } : {}),
              }
            : null,
        article: {
          id: row.a_id,
          sku: row.a_sku,
          name: row.a_name ?? null,
          slug: row.a_slug ?? null,
          photos,
          articlepic: photos,
          eans,
          articleean: eans,
        },
      };
    });
  };
}