import { ChartDataPoint, LineChartSeries } from './types';
/**
 * Chart utility functions
 */
/**
 * Get data domain from multiple series
 */
export declare function getMultiSeriesDomain(series: LineChartSeries[], accessor: (d: ChartDataPoint) => number): [number, number];
/**
 * Normalize data/series input for LineChart
 */
export declare function normalizeLineChartData(data?: ChartDataPoint[], series?: LineChartSeries[]): LineChartSeries[];
/**
 * Calculate chart dimensions including padding for axes and labels
 */
export declare function calculateChartDimensions(width: number, height: number, padding: {
    top: number;
    right: number;
    bottom: number;
    left: number;
}): {
    plotArea: {
        x: number;
        y: number;
        width: number;
        height: number;
    };
    total: {
        width: number;
        height: number;
    };
    padding: {
        top: number;
        right: number;
        bottom: number;
        left: number;
    };
};
/**
 * Scale a value from data domain to chart range
 */
export declare function scaleLinear(value: number, domain: [number, number], range: [number, number]): number;
/** Log scale (base 10) */
export declare function scaleLog(value: number, domain: [number, number], range: [number, number]): number;
/** Time scale (value = ms epoch) linear wrapper */
export declare function scaleTime(value: number, domain: [number, number], range: [number, number]): number;
export declare function generateLogTicks(domain: [number, number], count?: number): number[];
export declare function generateTimeTicks(domain: [number, number], count?: number): number[];
/**
 * Get data domain (min/max values) from dataset
 */
export declare function getDataDomain(data: ChartDataPoint[], accessor: (d: ChartDataPoint) => number): [number, number];
/**
 * Generate nice tick values for an axis
 */
export declare function generateTicks(min: number, max: number, targetCount?: number): number[];
/**
 * Convert chart coordinates to data coordinates
 */
export declare function chartToDataCoordinates(chartX: number, chartY: number, plotArea: {
    x: number;
    y: number;
    width: number;
    height: number;
}, xDomain: [number, number], yDomain: [number, number]): {
    x: number;
    y: number;
};
/**
 * Convert data coordinates to chart coordinates
 */
export declare function dataToChartCoordinates(dataX: number, dataY: number, plotArea: {
    x: number;
    y: number;
    width: number;
    height: number;
}, xDomain: [number, number], yDomain: [number, number]): {
    x: number;
    y: number;
};
/**
 * Find the closest data point to a chart coordinate
 */
export declare function findClosestDataPoint(chartX: number, chartY: number, data: ChartDataPoint[], plotArea: {
    x: number;
    y: number;
    width: number;
    height: number;
}, xDomain: [number, number], yDomain: [number, number], maxDistance?: number): {
    dataPoint: ChartDataPoint;
    distance: number;
} | null;
/**
 * Calculate angle for pie chart slice
 */
export declare function calculatePieAngle(value: number, total: number, startAngle?: number, endAngle?: number): {
    startAngle: number;
    endAngle: number;
    centerAngle: number;
};
/**
 * Calculate point on circle for pie chart labels
 */
export declare function getPointOnCircle(centerX: number, centerY: number, radius: number, angleInDegrees: number): {
    x: number;
    y: number;
};
/**
 * Create smooth path for line chart
 */
export declare function createSmoothPath(points: {
    x: number;
    y: number;
}[]): string;
export declare const colorSchemes: {
    default: string[];
    pastel: string[];
};
/**
 * Replace the default categorical palette while preserving reference identity for consumers.
 */
export declare function setDefaultColorScheme(palette?: string[]): string[];
/**
 * Get color from scheme
 */
export declare function getColorFromScheme(index: number, scheme?: string[]): string;
/**
 * Clamp value between min and max
 */
export declare function clamp(value: number, min: number, max: number): number;
/**
 * Linear interpolation
 */
export declare function lerp(start: number, end: number, t: number): number;
/**
 * Calculate distance between two points
 */
export declare function distance(x1: number, y1: number, x2: number, y2: number): number;
/**
 * Format number for display
 */
export declare function formatNumber(value: number, decimals?: number, locale?: string): string;
/**
 * Format percentage for display
 */
export declare function formatPercentage(value: number, total: number, decimals?: number): string;