import { type FC, type ReactNode } from 'react';
import { type LineChartDatum, type LineChartSeries } from './LineChartContext';
export interface LineChartTooltipRow {
    /** Series schema for this row. */
    series: LineChartSeries;
    /** Raw datum value at the active index for `series.key`. */
    value: number | string | null | undefined;
}
export interface LineChartTooltipRenderArgs {
    /** Active datum at the cursor's nearest X position. */
    datum: LineChartDatum;
    /**
     * Pre-resolved popover rows — visible series joined with their value at the
     * active index, in render order. Lets the render-prop be "just lay it out"
     * instead of "join + look up + format".
     */
    rows: LineChartTooltipRow[];
    /** Raw `xKey` value at the active datum. */
    xValue: number | string;
}
export interface LineChartTooltipProps {
    /**
     * Render-prop override for the popover body. Receives the active datum, the
     * pre-resolved `rows` (visible series + value pairs), and the X value at the
     * cursor. When omitted, the default surface renders timestamp + rows.
     */
    children?: (args: LineChartTooltipRenderArgs) => ReactNode;
    /** Custom formatter for the default popover timestamp slot. */
    xTickFormatter?: (value: unknown) => ReactNode;
}
export declare const LineChartTooltip: FC<LineChartTooltipProps>;