import '@vaadin/vaadin-button';
import { PropertyDeclarations, TemplateResult } from 'lit-element';
import { Item } from './private/Item';
import { ItemInterface } from './types';
import { SignableFields } from './private/SignableFields';
export { Item };
/**
 * A custom element providing a customizable donation form.
 *
 * @fires ItemsForm#change - changed form data.
 * @fires ItemsForm#submit - submitted form data
 * @fires ItemsForm#load -  ProgressEvent instance with server response
 *
 * @slot items - items to be added to the form.
 *
 * @element foxy-items-form
 *
 */
export declare class ItemsForm extends SignableFields {
    /** @readonly */
    static get scopedElements(): Record<string, unknown>;
    /** @readonly */
    static get properties(): PropertyDeclarations;
    /**
     * **Required** store subdomain, It is similar to mystore.foxycart.com,
     * unless you use a custom subdomain.
     *
     * **Examples:** `"mystore.foxycart.com"` `"custom.mycoolstore.com"`
     */
    store?: string;
    /**
     * **Required** 3-letter lowercase currency code.
     *
     * **Example:** `"usd"`
     */
    currency?: string;
    /**
     * Makes the entire form readonly.
     */
    readonly: boolean;
    /**
     * Defines target of the form
     *
     * This attribute controls the destination window of the form submission.
     */
    target: string;
    /**
     * Defines the next cart step
     *
     * It can only be either add or checkout.
     * If "add" is chosen, this form will add items to the cart and the user will
     * be directed to the cart with these products added upon submission.
     *
     * If set to "checkout" (this is the default) the user will be directed to
     * checkout.
     */
    cart: string;
    /**
     * Optional frequency string encoded as count (integer) + units (one of: `d`
     * for days, `w` for weeks, `m` for months, `y` for years). A special value
     * for twice a month is also supported: `.5m`. If set, the form will create a
     * subscription with the specified frequency in the cart.
     *
     * **Example:** `"1m"`
     */
    sub_frequency?: string;
    /**
     * Optional subscription start date encoded as four integer for the year, two
     * for the month and two for the day. If only two or one digits are provided,
     * it is assumed to be next occurence of that day of the month, from the
     * current date.
     *
     * See [Products wiki for more details](https://wiki.foxycart.com/v/2.0/products#a_complete_list_of_product_parameters)
     *
     * ** Example:** `"10"`
     */
    sub_startdate?: string;
    /**
     * Optional subscription token, unique URL of a subscription, retrieved from
     * the API, XML datafeeds or Admin interface.
     */
    sub_token?: string;
    /**
     * Optional. Allows the “add to cart” link or form to completely replace the
     * existing subscription loaded
     *
     * Can be either "replace", "append" or "" (a blank string).
     * Using "append" or "" will result in adding these items to an existing
     * subscription in addition to the existing ones.
     *
     * The "append" value is set for convenience, as it describes the behaviour.
     * The submitted value, in this case, will be "". The submitted value, in
     * this case, will be "".
     *
     * Using "replace" results in replacing the existing subscription with the
     * current itmes.
     * See [Products subscription options](https://wiki.foxycart.com/v/2.0/products/subscriptions#subscription-related_product_options)
     */
    sub_modify: string;
    /**
     *  Set to "true" to indicate that payment is collectable right now.
     *  Set to "auto" to indicate that payment is collectable right now if the
     *  subscription's past-due amount is greater than 0
     */
    sub_restart: string;
    /**
     * Optional subscription end date encoded as four integer for the year, two
     * for the month and two for the day.
     *
     * The absence of a sub_enddate, together with a sub_frequency, means a
     * subscription with indefinite and date.
     *
     * See [Products wiki for more details](https://wiki.foxycart.com/v/2.0/products#a_complete_list_of_product_parameters)
     *
     * ** Example:** `"20221010"`
     */
    sub_enddate?: string;
    /**
     * Optional frequency variants in the same format as `frequency`. If this property is set,
     * the form will render the frequency selection interface. If this array includes
     * the value of the `frequency` property, it will be pre-selected in the form.
     *
     * **Example:** `["7d", ".5m", "1y"]`
     */
    frequencies: string[];
    /**
     * Handles the submission of the form
     *
     * - creates a FormData
     * - fill the FormData with item values
     * - add order wide fields to the FormData
     * - submits the form
     */
    private handleSubmit;
    private __childItemsObserver?;
    private __hasValidItems;
    private __total;
    /**
     * Handles the user input for frequenty field
     * - converts week, year, day and month into first letter only
     * - removes spaces
     * - removes leading zeroes
     * - validates input as propper frequency option
     **/
    private __handleFrequency;
    private __data;
    constructor();
    get items(): ItemInterface[];
    /**
     * Optional an array of ItemInterface objects with at least the following properties:
     * - name: the name of the item
     * - price: the price of each of this item
     * The following optional properties will be used:
     * - quantity: (defaults to 1) how many of each item are added to the form
     * - image: an image url to be displayed in the form for this item
     * - items: an array of other items that are to be treated as bundled with this item
     * - signatures: an object containing a key value list of previously generated HMAC validation codes
     *
     * Other item properties are accepted and sent to foxy cart
     * See [Products wiki for more details](https://wiki.foxycart.com/v/2.0/products#a_complete_list_of_product_parameters)
     */
    set items(value: ItemInterface[]);
    /**
     * The total value of the items to be submitted.
     */
    get total(): number;
    render(): TemplateResult;
    /** Add new items */
    addItems(newItems: ItemInterface[]): void;
    /** Remove items */
    removeItems(itemIds: number[]): void;
    updated(): void;
    createItem(p: ItemInterface): Element;
    private __submitBtnText;
    /**
     * An array with both items created as elements and created parameter
     */
    private get __itemElements();
    /** Create child Items from items array
     */
    private __createItemsFromItemArray;
    /** Removes item from the form based on a condition */
    private __removeItems;
    /**
     * Adds a signature to a post field
     *
     * This method does not compute the signature. It must be provided.
     *
     * @argument string name The name of the field
     * @argument string signature The computed signature to add to the field
     * @argument string open Whether the field value is customized by the user
     * @return string signedName the name of the field with the signature
     */
    private __addSignature;
    /**
     * Add all items from this.__itemElements to a FormData
     *
     * - Iterate of items in itemElements
     * - Add valid items to Form Data
     *
     * @argument FormData fd the FormData instance to fill
     * @return number the number of items added
     **/
    private __formDataFill;
    /**
     * Add custom user provided fields
     */
    private __formDataCustomInputs;
    private __isAttributeReserved;
    /**
     * Adds a item to a form data
     *
     * @argument {FormData} fd the FormData to which the item will be added
     * @argument {Item} the item to add
     **/
    private __formDataAddItem;
    /**
     * Adds subscription fields to a FormData
     *
     * @argument {FormData} fd the FormData to which subscription fields will be added
     **/
    private __formDataAddSubscriptionFields;
    /**
     * Adds cart wide subscription fields to a FormData
     *
     * @argument {FormData} fd the FormData to which subscription fields will be added
     */
    private __formDataAddCartWideSubscriptionFields;
    /**
     * Adds cart related fields to a FormData
     *
     * @argument {FormData} fd the FormData to which the cart fields will be added.
     */
    private __formDataAddCartFields;
    /**
     * Validates a string for subscription start date or end date according to
     *
     * @argument string strDate the date as a string to be used as start or end date.
     *
     * https://wiki.foxycart.com/v/2.0/products#subscription_product_options
     * See [Products subscription options for more details](https://wiki.foxycart.com/v/2.0/products#subscription_product_options)
     */
    private static __validDate;
    /**
     * Checks if a string date is in the future.
     *
     * @argument string strdate the date, as a string, to be checked.
     * @returns boolean the date is a valid future date.
     */
    private static __validDateFuture;
    /**
     * Checks if a frequency complies with possible values
     *
     * @argument string strFrequency the frequency string to be validated.
     * @returns boolean the string is a foxy cart frequency string.
     */
    private static __validFrequency;
    /** Subscribe to late inserted items.
     *
     * @argument MutationRecord[] the list of changes occurred.
     **/
    private __observeChildren;
    /** Updates the form on item change */
    private __itemChange;
    /** Compute the total price of all items in the form */
    private __computeTotalPrice;
    /** Go through all pcroduct elements and executes acknoledges each one */
    private __acknowledgeItemElements;
    /**
     * Treat this item item element as part of the form:
     *
     * - listen to its change events
     * - set its currency to be the forms currency
     */
    private __acknowledgeItemElement;
    /**
     * Checks if item has quantity and price
     *
     * @argument  Item the item to be validated
     * @returns boolean the item is valid
     **/
    private __validItem;
    /**
     * Translates a frequency string
     *
     * @argument string the frequency string to be translated
     * @returns string the translated string
     */
    private __translateFrequency;
    /**
     * Translate a given amount
     *
     * @argument number the amount to be translated
     * @returns string the translated amount
     */
    private __translateAmount;
    private __updateData;
}