import type { DatePickerDateValidators, DatePickerDisplayFormat, DatePickerSelectedMonthYear, DatePickerValue } from './date-picker-types';
export interface DatePickerConstraints {
    cutoffTime?: string;
    daysOfWeekChecksum?: number;
    endDate?: string;
    invalidDates?: string[];
    startDate?: string;
    validDates?: string[];
}
/** Determines a year for a month and day when typeable input omits the year. */
export declare function buildInputDate(input: string, assume: 'current' | 'future' | 'past'): Date | undefined;
/** Formats a valid date as an ISO calendar date. */
export declare function formatDateISO(value: Date): string | undefined;
/** Formats a date for an accessible day label. */
export declare function formatDateFull(value: Date): string | undefined;
/** Returns localized abbreviated day names beginning with Sunday. */
export declare function getDays(): string[];
/** Returns localized full day names beginning with Sunday. */
export declare function getDaysOfWeek(): string[];
/** Parses the date picker's public ISO-only value contract. */
export declare function parseDatePickerValue(value?: string | null): Date | undefined;
/** Normalizes a legacy string or Moment-like value for the date picker's ISO-only calendar. */
export declare function normalizeDatePickerValue(value?: DatePickerValue | Date | null): string | undefined;
/** Returns the month and year used to initialize the date picker grid. */
export declare function setupMonthYear(value?: Date): DatePickerSelectedMonthYear;
/** Returns the enabled day indexes represented by a calendar checksum. */
export declare function getValidDaysOfWeek(checksum?: number): number[];
/** Determines whether a date satisfies the configured bounds and cutoff. */
export declare function baseValidation(dateValidators: DatePickerDateValidators, now: Date, newDate: Date): boolean;
/** Determines whether a date's weekday is enabled. */
export declare function validateAgainstChecksum(validDaysOfWeek: number[], date: Date): boolean;
/** Determines whether a date is absent from a blacklist. */
export declare function validateAgainstBlacklist(invalidDates: Date[], date: Date): boolean;
/** Determines whether a date is present in a whitelist. */
export declare function validateAgainstWhitelist(validDates: Date[], date: Date): boolean;
/** Formats a date using one of the date picker's supported numeric display formats. */
export declare function formatDisplayDate(date: Date, displayFormat: DatePickerDisplayFormat): string;
/** Formats a date using the legacy Moment-style tokens accepted by q2-calendar. */
export declare function formatLegacyDisplayDate(date: Date, displayFormat: string): string;
/** Determines whether a date satisfies every configured selection constraint. */
export declare function isDateSelectable(date: Date, constraints: DatePickerConstraints): boolean;
/** Determines whether every date in an inclusive range is selectable. */
export declare function isRangeSelectable(start: Date, end: Date, constraints: DatePickerConstraints): boolean;
/** Resolves a date-picker localization key or mapped default string. */
export declare function localizeDatePickerString(value: string, substitutions?: Record<string, string>): string;
/** Returns a supported display format, falling back to the date-picker default. */
export declare function normalizeDisplayFormat(displayFormat?: string): DatePickerDisplayFormat;