import type { ExternalTooltipContext, KChartData, TooltipState, ChartLegendSortFn, LegendValues, EnhancedLegendItem, TooltipInteractionMode } from '../types';
import type { Chart, Point } from 'chart.js';
import type { GranularityValues } from '@kong-ui-public/analytics-utilities';
export declare const isTooltipInteractive: (state: TooltipInteractionMode) => boolean;
export declare const lineChartTooltipBehavior: (tooltipData: TooltipState, context: ExternalTooltipContext, granularity: GranularityValues, options?: {
    contextFormatter?: (x: number, granularity: GranularityValues, raw: unknown) => string | number;
}) => void;
export declare const tooltipBehavior: (tooltipData: TooltipState, context: ExternalTooltipContext) => void;
export declare const hasDatasets: (chartData: KChartData) => number;
export declare const hasDataInDatasets: (chartData: KChartData) => boolean | 0;
export declare const hasTimeseriesData: (chartData: KChartData) => boolean;
export declare const hasExactlyOneDatapoint: (chartData: KChartData) => boolean;
export declare const hasMillisecondTimestamps: (chartData: KChartData) => boolean;
/**
  * Adjust the tooltip's horizontal position based on its width and cursor location relative to the chart center.
  * This logic ensures consistent visual placement of a custom tooltip, as ChartJS offers limited direct control.
  */
export declare const horizontalTooltipPositioning: (position: Point, tooltipWidth: number, chartCenterX: number) => number;
export declare const verticalTooltipPositioning: (position: Point, tooltipHeight: number, chartCenterY: number) => number;
export declare function debounce(fn: (...args: any) => any, delay: number): (...args: any) => void;
export declare const generateLegendItems: (chart: Chart, legendValues?: LegendValues, chartLegendSortFn?: ChartLegendSortFn) => EnhancedLegendItem[];
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