import { EventEmitter } from '@angular/core';
import { CartItem } from '../classes/cart-item';
import { CartChangeEvent } from '../interfaces/cart-change-event';
import { LocaleFormat } from '../interfaces/locale-format';
/**
 * The base class for storing items in your cart
 *
 * @service
 * @note {warning} Do not modify the items `id` after they are added to the cart. Doing so could result in duplicates which can cause
 * undefined behaviour
 * @order 1
 */
export declare abstract class CartService<T extends CartItem> {
    private localeFormat;
    private format;
    /**
     * Emits an event every time items, tax, shipping cost or currency formats are changed in the cart.
     */
    onChange: EventEmitter<CartChangeEvent>;
    /**
     * Emits an event every time an item is added to the cart.
     */
    onItemAdded: EventEmitter<T>;
    /**
     * Emits an event every time an item is removed from the cart.
     *
     * > This event only fires when a single item is removed by id. If you want to be notified of any removal (eg: clearing the cart) listen
     * to the `onChange` or the `onItemsChanged` event instead.
     */
    onItemRemoved: EventEmitter<T>;
    /**
     * Emits an event every time an item is added or removed from the cart.
     */
    onItemsChanged: EventEmitter<number>;
    /**
     * Emits an event every time taxes for the cart are changed.
     */
    onTaxChange: EventEmitter<number>;
    /**
     * Emits an event every time shipping costs for the cart are changed.
     */
    onShippingChange: EventEmitter<number>;
    /**
     * Finds an item by id
     */
    abstract getItem(id: any): T;
    /**
     * Gets all the items in the cart.
     */
    abstract getItems(): T[];
    /**
     * Add a new item to the cart.
     */
    abstract addItem(item: T): void;
    /**
     * Remove an item from the cart by id.
     */
    abstract removeItem(id: any): void;
    /**
     * Returns the number of unique items in the cart.
     */
    abstract itemCount(): number;
    /**
     * Returns the number of items including each item's quantity.
     */
    abstract entries(): number;
    /**
     * Returns the total cost of the shopping cart without shipping and taxes.
     */
    abstract cost(): number;
    /**
     * Removes all items from the cart.
     */
    abstract clear(): void;
    /**
     * Returns if the carts has any items in it.
     */
    abstract isEmpty(): boolean;
    /**
     * Returns the shipping cost of the shopping cart.
     */
    abstract getShipping(): number;
    /**
     * Sets the shipping cost of the shopping cart.
     */
    abstract setShipping(shipping: number): void;
    /**
     * Returns the tax rate of the shopping cart.
     */
    abstract getTaxRate(): number;
    /**
     * Sets the tax rate of the shopping cart.
     */
    abstract setTaxRate(tax: number): void;
    /**
     * Returns the tax computation of the shopping cart.
     */
    getTax(): number;
    /**
     * Returns the total cost of the shopping cart including shipping and taxes.
     */
    totalCost(): number;
    /**
     * Changes the currency symbol and number format for all components associated to this service instance.
     *
     * Check the Angular `CurrencyPipe` and the Internationalization guide for more info.
     */
    setLocaleFormat(format: string): void;
    /**
     * Returns the currency format as set with `setCurrencyFormat` or `'auto'` if no value is set.
     *
     * Passing true as parameter will return an object instead of a string.
     */
    getLocaleFormat(object?: boolean): string | LocaleFormat;
    /**
     * Returns an object with all the cart information in it, useful for serialization of the cart.
     */
    toObject(): any;
}