import { ThemeType } from '../../../types';
/** A single value the way callers pass it. */
export type RawPoint = number | {
    x?: string | number;
    y: number;
    label?: string;
};
/** A caller-supplied series. */
export interface RawSeries {
    name?: string;
    /** Tone name (`primary`, `blue`, …) or any CSS color. */
    color?: ThemeType | string;
    data: RawPoint[];
}
/** Normalized point used internally by every chart. */
export interface Point {
    /** Numeric x for scaling (index if labels are categorical). */
    x: number;
    y: number;
    /** Display label for the x value. */
    label: string;
}
/** Normalized series used internally by every chart. */
export interface Series {
    name: string;
    /** Resolved CSS color (already `var(--bgl-…)` or a raw color). */
    color?: ThemeType | string;
    points: Point[];
}
export interface NormalizeOptions {
    /** Shared x labels; overrides per-point labels when provided. */
    labels?: (string | number)[];
    /** Fallback color (tone name or CSS) for series that don't set their own.
        Lets a single-series chart honor a top-level `color` prop. */
    defaultColor?: ThemeType | string;
}
/**
 * Resolve `data` / `series` props into a uniform `Series[]`.
 * Exactly one of `data` or `series` is expected; `series` wins if both given.
 */
export declare function normalizeSeries(data: RawPoint[] | undefined, series: RawSeries[] | undefined, opts?: NormalizeOptions): Series[];
/** Flatten all y-values across series (for domain calc). */
export declare function allValues(series: Series[]): number[];
/** The x labels of the first/longest series (charts share an x axis). */
export declare function sharedLabels(series: Series[]): string[];
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