'use client';

type StockSource = {
  totalStock?: number | null;
  stock_count?: number | null;
  variants?: { available_stock?: number | null }[] | null;
};

export function resolveStockQty(source: StockSource): number | null {
  if (typeof source.totalStock === 'number') return source.totalStock;
  if (typeof source.stock_count === 'number') return source.stock_count;
  const stocks = (source.variants || [])
    .map((v) => v.available_stock)
    .filter((n): n is number => typeof n === 'number');
  if (!stocks.length) return null;
  return stocks.reduce((sum, n) => sum + n, 0);
}

export function ProductCardMeta({
  sku,
  discount,
  brand,
  className = '',
}: {
  stock?: number | null;
  sku?: string | null;
  discount?: number | null;
  brand?: string | null;
  className?: string;
}) {
  const extra =
    discount && discount > 0
      ? `${discount}% off`
      : sku
        ? String(sku)
        : brand && brand !== 'iFixKart'
          ? String(brand)
          : '';

  if (!extra) return null;

  return (
    <p className={`text-[11px] leading-snug mb-1.5 text-gray-400 ${className}`}>
      {extra}
    </p>
  );
}