import { AccountMod } from "./modules/Account";
import { CartMod } from "./modules/Cart";
import { CheckoutMod } from "./modules/Checkout";
import { OrderModule } from "./modules/Order";
import { PageMod } from "./modules/Page";
import { ProductDisplayMod } from "./modules/ProductDisplay";
import { ProductListingMod } from "./modules/ProductListing";
import { WishlistMod } from "./modules/Wishlist";
import type { DataLayerConfig, EventData } from "./types";
/**
 * DataLayer - A unified interface for managing data layer events
 *
 * This class provides access to various modules for common tracking scenarios
 * and handles the core data layer functionality including initialisation, smart nullification and event pushing.
 */
declare class DataLayer {
    private static instance;
    private config;
    private user;
    private isFirstEventAfterRefresh;
    private dataLayer;
    private previousEvent;
    private propertiesToNullify;
    page: PageMod;
    pdp: ProductDisplayMod;
    plp: ProductListingMod;
    cart: CartMod;
    checkout: CheckoutMod;
    account: AccountMod;
    wishlist: WishlistMod;
    order: OrderModule;
    /**
     * Constructor initialises the data layer and all modules
     */
    private constructor();
    /**
     * Get the singleton instance of DataLayer
     */
    static getInstance(): DataLayer;
    /**
     * Initialise the DataLayer with configuration options
     * @param {DataLayerConfig} options Configuration options including required site information
     * @throws Error if siteInfo is not provided
     * @example
     * const dl = getDataLayer();
     *
     * dl.init({
     * 	siteInfo: {
     * 		name: "my-site",
     * 		experience: "desktop",
     * 		currency: "AUD",
     * 		division: "myCompany",
     * 		domain: "www.my-site.com.au",
     * 		env: "prod",
     * 		version: "4.2.0"
     * 	}
     * });
     */
    init(options: DataLayerConfig): void;
    /**
     * Pushes an event to the Adobe Data Layer with properly formatted data
     * @param eventName The name of the event
     * @param eventData Object containing the event data
     * @throws Error if DataLayer has not been initialised with siteInfo
     */
    pushEvent(eventName: string, eventData?: EventData): Promise<void>;
    clearProducts(): void;
    /**
     * Validates that the DataLayer is properly initialised
     * @private
     */
    private validateInitialisation;
    /**
     * Prepares the event object with all necessary data
     * @private
     */
    private prepareEventObject;
    /**
     * Applies nullification logic to track state changes between events
     * @private
     */
    private applyNullificationLogic;
    /**
     * Handles nullification for nested properties in the 'default' object
     * @private
     */
    private handleDefaultObjectNullification;
    /**
     * Stores a clean version of the event as previousEvent by removing nullified properties
     * @private
     */
    private storeCleanPreviousEvent;
    /**
     * Reset the first event flag - useful for testing or when you need to force
     * the site information to be sent again
     */
    resetFirstEventFlag(): void;
    /**
     * Configure properties that should be automatically nullified
     * @param properties - Map of object keys to arrays of properties to nullify
     */
    setPropertiesToNullify(properties: Record<string, string[]>): void;
    /**
     * Add properties to nullify for a specific object key
     * @param key - The object key (e.g., 'default')
     * @param properties - Array of property names to nullify
     */
    addPropertiesToNullify(key: string, properties: string[]): void;
}
export default DataLayer;
export declare function getDataLayer(): DataLayer;