import type { CartRepository } from '@/domain/cart/repository';
import type { CartItem } from '@/domain/cart/entities';
import { STORAGE_KEYS } from '@/domain/shared/constants';

export class LocalStorageCartRepository implements CartRepository {
  load(): CartItem[] {
    if (typeof window === 'undefined') return [];

    const raw = localStorage.getItem(STORAGE_KEYS.cart);
    if (!raw) return [];

    try {
      const parsed = JSON.parse(raw) as CartItem[];
      return Array.isArray(parsed) ? parsed : [];
    } catch {
      return [];
    }
  }

  save(items: CartItem[]): void {
    if (typeof window === 'undefined') return;
    localStorage.setItem(STORAGE_KEYS.cart, JSON.stringify(items));
  }
}