import type { Day as WeekDay } from 'date-fns';
import type { Activity, Week } from "../types/charts";
export declare const DEFAULT_MONTH_LABELS: string[];
export declare const DEFAULT_LABELS: {
    legend: {
        less: string;
        more: string;
    };
    months: string[];
    tooltip: string;
    totalCount: string;
    weekdays: string[];
};
interface MonthLabel {
    label: string;
    weekIndex: number;
}
export declare const groupByWeeks: (activities: Array<Activity>, weekStart?: WeekDay) => Array<Week>;
export declare const getMonthLabels: (weeks: Array<Week>, monthNames?: Array<string>) => Array<MonthLabel>;
export declare const generateEmptyData: () => Array<Activity>;
export declare const generateTestData: (args: {
    interval?: {
        end: Date;
        start: Date;
    };
    maxLevel?: number;
}) => Array<Activity>;
export declare const maxWeekdayLabelLength: (firstWeek: Week, weekStart: number, labels: string[], fontSize: number) => number;
export {};