/**
 * Copyright (c) 2016 Denis Taran
 *
 * Homepage: https://smartscheduling.com/en/documentation/autocomplete
 * Source: https://github.com/denis-taran/autocomplete
 *
 * MIT License
 */
export declare const enum EventTrigger {
    Keyboard = 0,
    Focus = 1,
    Mouse = 2,
    /**
     * Fetch is triggered manually by calling `fetch` function returned in `AutocompleteResult`
     */
    Manual = 3
}
/**
 * Enum for controlling form submission when `ENTER` key is pressed in the autocomplete input field.
 */
export declare const enum PreventSubmit {
    Never = 0,
    Always = 1,
    /**
     * Form submission is prevented only when an item is selected from the autocomplete list.
     */
    OnSelect = 2
}
export interface AutocompleteItem {
    label?: string;
    group?: string;
}
export interface AutocompleteEvent<T extends Event> {
    /**
     * Native event object passed by browser to the event handler
     */
    event: T;
    /**
     * Fetch data and display autocomplete
     */
    fetch: () => void;
}
export interface AutocompleteSettings<T extends AutocompleteItem> {
    /**
     * Autocomplete will be attached to this element.
     */
    input: HTMLInputElement | HTMLTextAreaElement;
    /**
     * Provide your own container for the widget.
     * If not specified, a new DIV element will be created.
     */
    container?: HTMLDivElement;
    /**
     * This method allows you to override the default rendering function for items.
     * It must return a DIV element or undefined to skip rendering.
     */
    render?: (item: T, currentValue: string, index: number) => HTMLDivElement | undefined;
    /**
     * This method allows you to override the default rendering function for item groups.
     * It must return a DIV element or undefined to skip rendering.
     */
    renderGroup?: (name: string, currentValue: string) => HTMLDivElement | undefined;
    /**
     * If specified, the autocomplete DOM element will have this class assigned to it.
     */
    className?: string;
    /**
     * Specify the minimum text length required to show autocomplete.
     */
    minLength?: number;
    /**
     * The message that will be showed when there are no suggestions that match the entered value.
     */
    emptyMsg?: string;
    /**
     * This method will be called when user choose an item in autocomplete. The selected item will be passed as the first parameter.
     */
    onSelect: (item: T, input: HTMLInputElement | HTMLTextAreaElement) => void;
    /**
     * Show autocomplete on focus event. Focus event will ignore the `minLength` property and will always call `fetch`.
     */
    showOnFocus?: boolean;
    /**
     * This method will be called to prepare suggestions and then pass them to autocomplete.
     * @param {string} text - text in the input field
     * @param {(items: T[] | false) => void} update - a callback function that must be called after suggestions are prepared
     * @param {EventTrigger} trigger - type of the event that triggered the fetch
     * @param {number} cursorPos - position of the cursor in the input field
     */
    fetch: (text: string, update: (items: T[] | false) => void, trigger: EventTrigger, cursorPos: number) => void;
    /**
     * Enforces that the fetch function will only be called once within the specified time frame (in milliseconds) and
     * delays execution. This prevents flooding your server with AJAX requests.
     */
    debounceWaitMs?: number;
    /**
     * Callback for additional autocomplete customization
     * @param {HTMLInputElement | HTMLTextAreaElement} input - input box associated with autocomplete
     * @param {ClientRect | DOMRect} inputRect - size of the input box and its position relative to the viewport
     * @param {HTMLDivElement} container - container with suggestions
     * @param {number} maxHeight - max height that can be used by autocomplete
     */
    customize?: (input: HTMLInputElement | HTMLTextAreaElement, inputRect: ClientRect | DOMRect, container: HTMLDivElement, maxHeight: number) => void;
    /**
     * Controls form submission when the ENTER key is pressed in a input field.
     */
    preventSubmit?: PreventSubmit;
    /**
     * Prevents the first item in the list from being selected automatically. This option allows you
     * to submit a custom text by pressing ENTER even when autocomplete is displayed.
     */
    disableAutoSelect?: boolean;
    /**
     * Provide your keyup event handler to display autocomplete when a key is pressed that doesn't modify the content. You can also perform some additional actions.
     */
    keyup?: (e: AutocompleteEvent<KeyboardEvent>) => void;
    /**
     * Allows to display autocomplete on mouse clicks or perform some additional actions.
     */
    click?: (e: AutocompleteEvent<MouseEvent>) => void;
}
export interface AutocompleteResult {
    /**
     * Remove event handlers, DOM elements and ARIA/accessibility attributes created by the widget.
     */
    destroy: () => void;
    /**
     * This function allows to manually start data fetching and display autocomplete. Note that
     * it does not automatically place focus on the input field, so you may need to do so manually
     * in certain situations.
     */
    fetch: () => void;
}
export default function autocomplete<T extends AutocompleteItem>(settings: AutocompleteSettings<T>): AutocompleteResult;