import { DateInput, DatePickerOptions, DatePickerState } from './date-picker.types';
/**
 * Headless date picker. Owns a calendar grid it renders into the consumer's
 * markup, manages selection/navigation state, ARIA wiring, keyboard support and
 * floating-ui positioning. No visual styling is applied in JS — state is
 * reflected via `data-state`, `data-today`, `data-outside` and `aria-*`.
 *
 * Markup:
 * ```html
 * <div data-c42-datepicker>
 *   <button data-c42-datepicker-trigger>
 *     <span data-c42-datepicker-value></span>
 *   </button>
 *   <div data-c42-datepicker-panel>
 *     <div>
 *       <button data-c42-datepicker-prev>Prev</button>
 *       <span data-c42-datepicker-label></span>
 *       <button data-c42-datepicker-next>Next</button>
 *     </div>
 *     <div data-c42-datepicker-grid></div>
 *   </div>
 * </div>
 * ```
 */
export declare class DatePicker {
    private readonly root;
    private readonly trigger;
    private readonly panel;
    private readonly grid;
    private readonly valueEl;
    private readonly labelEl;
    private readonly prevBtn;
    private readonly nextBtn;
    private readonly locale;
    private readonly weekStartsOn;
    private readonly placeholder;
    private readonly closeOnSelect;
    private readonly placement;
    private readonly offset;
    private readonly formatLabel?;
    private readonly min;
    private readonly max;
    private readonly mode;
    private selected;
    private rangeStart;
    private rangeEnd;
    private hoverDate;
    private viewMonth;
    private focused;
    private open;
    private stopAutoUpdate;
    private cleanups;
    constructor(root: HTMLElement, options?: DatePickerOptions);
    private init;
    private renderLabel;
    private format;
    private weekdayNames;
    private isDisabled;
    private renderGrid;
    private renderDay;
    private onGridClick;
    private onGridMouseover;
    private onGridKeydown;
    private moveFocus;
    private focusActiveDay;
    private goToMonth;
    private select;
    private selectRange;
    private emitChange;
    private onOutside;
    toggle(): void;
    openPanel(): void;
    close(): void;
    /** Programmatically set the selected date (ISO string or Date). */
    setValue(value: DateInput | null): void;
    /** Clear the current selection. */
    clear(): void;
    private position;
    get value(): string | null;
    get isOpen(): boolean;
    getState(): DatePickerState;
    on<E extends Event = Event>(event: string, handler: (event: E) => void): () => void;
    destroy(): void;
}