import { ShopCart } from './types.js';

/**
 * F136 Phase 1 — Cart storage adapter.
 *
 * Default implementation: in-process Map keyed by cartId. That's enough
 * for filesystem-adapter sites running on a single Node process and for
 * the unit tests.
 *
 * Sites running on multiple instances (Fly machine pairs, Vercel
 * serverless) should pass a `CartStore` backed by their shared cache —
 * Redis, Upstash KV, Cloudflare KV. The interface is small on purpose.
 *
 * Carts have a 48 h TTL. The in-memory store sweeps expired entries on
 * each `get()` so it doesn't grow unbounded.
 */

interface CartStore {
    get(id: string): Promise<ShopCart | null>;
    set(cart: ShopCart): Promise<void>;
    delete(id: string): Promise<void>;
}
declare function createInMemoryCartStore(): CartStore;
declare const CART_TTL_MS: number;

export { CART_TTL_MS as C, type CartStore as a, createInMemoryCartStore as c };