import { Currency } from "@selldone/core-js/enums/payment/Currency";
import { BasketItem } from "@selldone/core-js/models/shop/order/basket/basket_item.model";
import { XapiBasket } from "../XapiBasket";
import { Basket } from "@selldone/core-js/models/shop/order/basket/basket.model";
/**
 * Adds an item to the basket.
 *
 * This function is used to add a specified product variant to the basket with the given quantity and optional parameters.
 *
 * @param {number} product_id - The ID of the product to be added.
 * @param {number | null} variant_id - The ID of the product variant, or null if not applicable.
 * @param {number} count - The quantity of the item to be added.
 * @param {XapiBasketAddItemTypes.IOption} [options] - Optional parameters for adding the item.
 * @returns {Promise<XapiBasketAddItemTypes.IResponse>} - The response from the server after attempting to add the item.
 *
 * @example
 * window.$storefront.basket
 *   .addItem(product_id, variant_id, count, {
 *     preferences: preferences,
 *     vendor_product_id: vendor_product_id, // 🟣 Marketplace 🟣
 *     price_id: subscription_price_id, // 🎗️ Subscription
 *   })
 *   .then(({ basket, bill, refresh, error, error_msg }) => {
 *     if (basket) {
 *       this.setBasket(basket);
 *       this.setBasketBill(basket, bill);
 *       if (callbackSuccess) callbackSuccess(basket);
 *     }
 *
 *     if (error) {
 *       NotificationService.showErrorAlert(null, error_msg);
 *       if (callbackError) callbackError(error_msg!);
 *     }
 *
 *     if (refresh) this.fetchBasketAndShop(); // Important! Fetch data from server. (Ex. Remove item automatically from basket)
 *   })
 *   .catch((error) => {
 *     NotificationService.showLaravelError(error);
 *     if (callbackError) callbackError(error);
 *   });
 */
export default function XapiBasketAddItem(this: XapiBasket, product_id: number, variant_id: number | null, count: number, options?: XapiBasketAddItemTypes.IOption): Promise<XapiBasketAddItemTypes.IResponse>;
export declare namespace XapiBasketAddItemTypes {
    interface IResponse {
        error: boolean;
        error_msg: string | null;
        refresh?: boolean;
        success: boolean;
        basket: Basket;
        bill: Basket.ICalculatedBill;
    }
    interface IOption {
        currency?: keyof typeof Currency;
        preferences?: BasketItem.IPreferences | null;
        vendor_product_id?: number | null;
        price_id?: number | null;
    }
}