import type { ScaleType } from './types';
type AxisSlot = `y1` | `y2`;
interface AxisAssignableSeries {
    axis_group?: string;
    label?: string;
    unit?: string;
    visible?: boolean;
    y_axis?: AxisSlot;
}
export interface AxisValueSeries extends AxisAssignableSeries {
    y: readonly number[];
}
interface AxisGroup<Series extends AxisAssignableSeries> {
    key: string;
    priority: number;
    series: readonly Series[];
    series_indices: readonly number[];
}
interface AssignedAxisGroup<Series extends AxisAssignableSeries> extends AxisGroup<Series> {
    axis: AxisSlot;
}
interface AxisGroupingOptions<Series extends AxisAssignableSeries> {
    is_visible?: (series: Series, series_idx: number) => boolean;
    priority?: (group_key: string, series: readonly Series[]) => number;
}
export interface AxisAssignmentOptions<Series extends AxisAssignableSeries> extends AxisGroupingOptions<Series> {
    max_axes?: 1 | 2;
}
interface AxisAssignmentBase<Series extends AxisAssignableSeries> {
    assignments: readonly (AxisSlot | undefined)[];
    groups: readonly AssignedAxisGroup<Series>[];
}
interface CompleteAxisAssignment<Series extends AxisAssignableSeries> extends AxisAssignmentBase<Series> {
    status: `assigned`;
    overflow_groups: readonly [];
}
export interface OverflowAxisAssignment<Series extends AxisAssignableSeries> extends AxisAssignmentBase<Series> {
    status: `overflow`;
    error: AxisAssignmentOverflowError;
    overflow_groups: readonly AxisGroup<Series>[];
}
type AxisAssignmentResult<Series extends AxisAssignableSeries> = CompleteAxisAssignment<Series> | OverflowAxisAssignment<Series>;
interface AxisLabelOptions<Series extends AxisAssignableSeries> {
    is_visible?: (series: Series, series_idx: number) => boolean;
    axis?: readonly (AxisSlot | undefined)[] | AxisAccessor<Series>;
    fallback_label?: string;
}
interface AxisScaleTypeOptions<Series extends AxisValueSeries> {
    is_visible?: (series: Series, series_idx: number) => boolean;
    axis?: readonly (AxisSlot | undefined)[] | AxisAccessor<Series>;
    can_use_log_scale: (series: Series) => boolean;
    min_log_decades?: number;
}
type AxisAccessor<Series extends AxisAssignableSeries> = (series: Series, series_idx: number) => AxisSlot | undefined;
export declare class AxisAssignmentOverflowError extends Error {
    readonly group_keys: readonly string[];
    readonly max_axes: number;
    readonly reserved_axes: readonly AxisSlot[];
    constructor(group_keys: readonly string[], max_axes: number, reserved_axes?: readonly AxisSlot[]);
}
export declare const axis_group_key: (series: AxisAssignableSeries) => string;
export declare function group_axis_series<Series extends AxisAssignableSeries>(series: readonly Series[], options?: AxisGroupingOptions<Series>): AxisGroup<Series>[];
export declare function assign_axes<Series extends AxisAssignableSeries>(series: readonly Series[], options?: AxisAssignmentOptions<Series>): AxisAssignmentResult<Series>;
export declare function axis_labels<Series extends AxisAssignableSeries>(series: readonly Series[], options?: AxisLabelOptions<Series>): Record<AxisSlot, string>;
export declare function axis_scale_types<Series extends AxisValueSeries>(series: readonly Series[], options: AxisScaleTypeOptions<Series>): Record<AxisSlot, ScaleType>;
export {};