import { type RefObject } from 'react';
import type { LineChartDatum, LineChartZoomDragState, LineChartZoomPendingState, LineChartZoomRange } from '../LineChartContext';
interface UseLineChartZoomStateResult {
    enabled: boolean;
    drag: LineChartZoomDragState | null;
    pending: LineChartZoomPendingState | null;
    registerEnabled: () => () => void;
    startDrag: (index: number, clientX: number, clientY: number) => void;
    updateDrag: (index: number, clientX: number, clientY: number) => void;
    endDrag: () => void;
    cancelDrag: () => void;
    confirmZoom: () => void;
    cancelPending: () => void;
}
/**
 * Two-phase zoom selection state machine.
 *
 * - `drag` is the live mouse-held selection — updated on every mousemove,
 *   torn down on Escape, promoted to `pending` on mouseup.
 * - `pending` is the released-but-unconfirmed selection — renders the confirm
 *   popover. Commits via `confirmZoom` (fires `onZoomChange`) or dismisses via
 *   `cancelPending` (no emit).
 *
 * `enabledCount` (not a boolean) so multiple brush instances can't race when
 * one unmounts while another remains. Window-level listeners are wired up by
 * `useZoomDragListeners` so the popover keeps tracking when the cursor leaves
 * the SVG and a mouseup outside the chart still releases into pending.
 *
 * Drag updates from recharts (`updateDrag` — carries index+coords) and from
 * the window listener (`handleDragMove` — coords only) both write into a
 * single pending-frame buffer and flush together on the next animation frame.
 * That collapses the two motion paths into one React commit per frame and
 * keeps state writes off the synchronous mousemove path.
 *
 * Dataset changes invalidate cached indices on both `drag` and `pending`, so
 * both reset whenever `data` or `xKey` flips — otherwise a stale range could
 * be committed against a refreshed dataset.
 */
export declare const useLineChartZoomState: ({ data, xKey, onZoomChangeRef, }: {
    data: LineChartDatum[];
    xKey: string;
    onZoomChangeRef: RefObject<((range: LineChartZoomRange | null) => void) | undefined>;
}) => UseLineChartZoomStateResult;
export {};