/**
 * Pure math utilities for SVG chart rendering.
 * Scales, path generation, sparklines, and axis computation.
 */
export interface ChartDimensions {
    width: number;
    height: number;
    padding: number;
    chartWidth: number;
    chartHeight: number;
}
export interface ScaleConfig {
    min: number;
    max: number;
    range: number;
}
/**
 * Calculate chart dimensions with padding
 */
export declare function calculateChartDimensions(width: number, height: number, padding: number): ChartDimensions;
/**
 * Calculate scale configuration for a set of values
 */
export declare function calculateScale(values: number[], includeZero?: boolean): ScaleConfig;
/**
 * Create a linear scale function
 */
export declare function createLinearScale(domain: [number, number], range: [number, number]): (value: number) => number;
/**
 * Generate evenly spaced tick values
 */
export declare function generateTicks(min: number, max: number, count: number): number[];
/**
 * Generate SVG path for line chart
 */
export declare function generateLinePath(points: Array<{
    x: number;
    y: number;
}>, curve?: boolean): string;
/**
 * Generate SVG path for area under line
 */
export declare function generateAreaPath(linePath: string, firstX: number, lastX: number, baselineY: number): string;
/**
 * Calculate points for a sparkline
 */
export declare function calculateSparklinePoints(data: number[], width: number, height: number): Array<{
    x: number;
    y: number;
}>;
/**
 * Format timestamp as HH:MM:SS for chart axis labels
 *
 * @param timestamp - Unix timestamp in milliseconds
 * @returns Formatted time string (e.g., "14:30:05")
 */
export declare function formatChartTime(timestamp: number): string;
/**
 * Auto-scale configuration for Y-axis
 */
export interface AutoYScaleConfig {
    /** Minimum value on the axis */
    min: number;
    /** Maximum value on the axis */
    max: number;
    /** Range (max - min) */
    range: number;
}
/**
 * Calculate auto-scaling Y-axis bounds based on visible data with padding.
 * Automatically adds 10% padding above and below the data range.
 *
 * @param values - Array of numeric values to calculate scale for
 * @param options - Optional configuration
 * @param options.paddingPercent - Padding percentage (default: 0.1 = 10%)
 * @param options.minPadding - Minimum padding in data units (default: 5)
 * @param options.includeZero - Whether to always include zero in the scale (default: false)
 * @returns Scale configuration with min, max, and range
 */
export declare function calculateAutoYScale(values: number[], options?: {
    paddingPercent?: number;
    minPadding?: number;
    includeZero?: boolean;
}): AutoYScaleConfig;
/**
 * Get color from chart series palette by index.
 * Cycles through palette if index exceeds palette length.
 *
 * @param index - Zero-based index of the data series
 * @param palette - Array of color hex strings
 * @returns Hex color string
 */
export declare function getSeriesColor(index: number, palette: readonly string[]): string;
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