import { InvoiceOverlayConfig } from '../overlay/overlay';
import './button.scss';
/**
 * Payment button types
 */
export declare enum PaymentButtonType {
    /**
     * Simple payment button
     */
    SIMPLE = "SIMPLE",
    /**
     * Payment button with amount and currency inputs
     */
    AMOUNT_SELECTOR = "AMOUNT_SELECTOR",
    /**
     * Donation button
     */
    DONATION = "DONATION"
}
export interface ConfirmoButtonValues {
    /**
     * Amount to pay
     */
    merchantAmount?: number | string;
    /**
     * Payment currency
     */
    merchantCurrency?: string;
    /**
     * Name of the product
     */
    productName?: string;
    /**
     * Description of the product
     */
    productDescription?: string;
    /**
     * Merchant reference
     */
    reference?: string;
    /**
     * Return url used after payment proceeds
     */
    returnUrl?: string;
    /**
     * Customer currency of the button
     */
    customerCurrency?: string;
    /**
     * If true, the invoice is displayed in an overlay
     */
    overlay?: boolean;
}
export interface ConfirmoButtonConfig {
    /**
     * id of element where button will be rendered
     */
    id?: string;
    /**
     * element where button will be rendered
     */
    element?: Element;
    /**
     * payment button id
     */
    paymentButtonId: string;
    /**
     * Your Merchant ID assigned by Confirmo
     */
    merchantId: string;
    /**
     * Payment button URL
     */
    url?: string;
    /**
     * @internal
     */
    apiUrl?: string;
    /**
     * type of payment button.
     *
     * Default value is SIMPLE.
     */
    buttonType?: PaymentButtonType;
    /**
     * Payment button values
     */
    values?: ConfirmoButtonValues;
}
/**
 * Confirmo payment button
 */
export declare class PaymentButton {
    private callback;
    private static cachedCurrencies;
    private readonly element;
    private readonly values;
    private readonly config;
    private readonly images;
    private readonly overlayConfig;
    /**
     * Initialize new payment button
     *
     * @param {ConfirmoButtonConfig} args Button configuration
     * @param {Function} callback Callback function called when overlay closed (relevant only if args.values.overlay set to true)
     * @param {InvoiceOverlayConfig} overlayConfig Config for invoice overlay (relevant only if args.values.overlay set to true)
     * @return PaymentButton
     * @example
     *
     * const button = PaymentButton.initialize({
     *  id: 'bp-simple-button',
     *  paymentButtonId: 'pbt16354asde',
     *  buttonType: 'SIMPLE',
     *  values: {
     *      merchantAmount: 100,
     *      merchantCurrency: 'LTC',
     *      productName: 'Some cool product',
     *      productDescription: 'Simple description',
     *      reference: 'merchantRef',
     *      returnUrl: 'https://my-cool-eshop.com/?q=this+is+return+url'
     *  }
     * }, () => {
     *      console.log('Overlay has been closed!');
     * },
     * {
     *   closeAfterPaid: true,
     *   closeAfterPaidTimeoutMs: 2000,
     * });
     */
    static initialize(args: ConfirmoButtonConfig, callback?: Function, overlayConfig?: InvoiceOverlayConfig): PaymentButton;
    /**
     * PaymentButton constructor
     *
     * @param {ConfirmoButtonConfig} args
     * @param {Function} callback
     * @param {InvoiceOverlayConfig} overlayConfig
     */
    private constructor();
    private getCurrenciesUrl;
    private getInvoiceUrl;
    private addOverlayFormListener;
    private getButtonImage;
    private validateArguments;
    private loadCurrencies;
    private selectedCurrency;
    private getHtml;
    private shouldAddHiddenInput;
    /**
     * Remove the button HTML
     */
    remove(): void;
}