QUERY

import { catalogVersioning, products, productsV3 } from '@wix/stores';

export interface ProductsPage {
  products: unknown[];        // narrow at call site
  nextCursor: string | null;  // V3 only
  hasNext: boolean;
  totalCount: number | null;  // V1 only
}

export async function listProductsPage(
  limit: number,
  cursorOrSkip: string | number | undefined,
): Promise<ProductsPage> {
  const v = await getVersion();
  if (v === 'STORES_NOT_INSTALLED') {
    return { products: [], nextCursor: null, hasNext: false, totalCount: 0 };
  }

  if (v === 'V3_CATALOG') {
    let builder = productsV3.queryProducts().limit(limit);
    if (typeof cursorOrSkip === 'string') builder = builder.skipTo(cursorOrSkip);
    // Do NOT chain a sort — see OVERVIEW.md gotcha #10.
    const res = await builder.find();
    return {
      products: res.items,
      nextCursor: res.cursors.next ?? null,
      hasNext: res.hasNext(),
      totalCount: null,
    };
  }

  const skip = typeof cursorOrSkip === 'number' ? cursorOrSkip : 0;
  const res = await products.queryProducts().skip(skip).limit(limit).find();
  return {
    products: res.items,
    nextCursor: null,
    hasNext: res.hasNext(),
    totalCount: res.totalCount ?? null,
  };
}

// `v` comes from getVersion() — see STORES_VERSIONING.md.
export async function searchByName(
  term: string,
  limit: number,
  v: 'V1_CATALOG' | 'V3_CATALOG' | 'STORES_NOT_INSTALLED',
) {
  if (v === 'V3_CATALOG') {
    const res = await productsV3.searchProducts({
      cursorPaging: { limit },
      // `fields` is required for free-text search. Searchable: 'name', 'description',
      // 'variantsInfo.variants.sku', 'minVariantPriceInfo.sku'.
      search: { expression: term, fields: ['name'], fuzzy: true },
    });
    // Note `products` (not `items`) and `pagingMetadata.hasNext` (a property, not a method).
    return res.products ?? [];
  }
  const res = await products.queryProducts().startsWith('name', term).limit(limit).find();
  return res.items;
}

function displayPrice(p: { actualPriceRange?: { minValue?: { amount?: string }; maxValue?: { amount?: string } } }): string {
  const min = p.actualPriceRange?.minValue?.amount;
  const max = p.actualPriceRange?.maxValue?.amount;
  if (!min) return '—';
  return max && max !== min ? `${min} – ${max}` : min;
}

function stockLabel(status: string | undefined): string {
  switch (status) {
    case 'IN_STOCK': return 'In Stock';
    case 'OUT_OF_STOCK': return 'Out of Stock';
    case 'PARTIALLY_OUT_OF_STOCK': return 'Limited';
    case 'PREORDER': return 'Pre-order';
    default: return '—';
  }
}
// V1 path: product.stock.inventoryStatus  (same UPPER_SNAKE_CASE values)
// V3 path: product.inventory.availabilityStatus (adds PREORDER)
// SKU lives on the variant — show "—" in lists, or use Read-Only Variants API.