import type { EChartsOption } from 'echarts';
import type { WidgetConfig } from './models';
export interface ChartColorPalette {
    colors: string[];
    heatmapRamp?: string[];
}
export declare const SAMPLE_DATA: Record<string, Array<{
    name: string;
    value: number;
}>>;
/** Max slices in print donuts before remaining merge into "Other" (report/PDF readability). */
export declare const PRINT_DONUT_MAX_SLICES = 7;
/**
 * Humanize technical dimension strings for print (underscores, length cap with middle ellipsis).
 */
export declare function formatPrintLegendLabel(name: string, maxChars?: number): string;
/**
 * Legend segment count after print top-N + Other aggregation (for report row-height tiers).
 */
export declare function getPrintDonutLegendSegmentCount(widget: WidgetConfig): number;
export declare const MULTI_SERIES_TREND: {
    xLabels: string[];
    series: {
        name: string;
        data: number[];
    }[];
};
export declare const HEATMAP_DATA: {
    hours: string[];
    servers: string[];
    data: number[][];
};
/** Optional tuning for print/PDF donut layout inside the parent container. */
export type PrintChartOptions = {
    /** Legacy very-dense mode (3+ charts per row). */
    compact?: boolean;
    /**
     * Narrow-ring donut layout (same ECharts radii as a 2-up print cell). Use for every print
     * donut row with 1–2 charts so a lone full-width widget matches its neighbors’ ring size;
     * not only literal half-width containers.
     */
    halfWidthCell?: boolean;
};
/**
 * Print-optimized chart options: dark text on white, no truncation,
 * smaller donuts, full legend values, no animation, no tooltips.
 */
export declare function optionsForPrint(widget: WidgetConfig, printOpts?: PrintChartOptions, chartPalette?: ChartColorPalette): EChartsOption;
export declare function optionsForWidget(widget: WidgetConfig, chartPalette?: ChartColorPalette): EChartsOption;