import type { DateValue, RangeValue } from "../types/general.js";
/**
 * Returns a Date object representing 1970-01-01T00:00:00.000Z.
 *
 * @return {Date} A Date object representing 1970-01-01T00:00:00.000Z.
 */
export declare const getZeroDate: () => Date;
/**
 * Returns true if the given Date object represents the date 1970-01-01T00:00:00.000Z, false otherwise.
 *
 * @param {Date} date - The date to check.
 * @return {boolean} True if the date is 1970-01-01T00:00:00.000Z, false otherwise.
 */
export declare const isZeroDate: (date: Date) => boolean;
/**
 * Returns a new Date object representing the month before the given date.
 *
 * @param {Date} fnDate - The date from which to calculate the previous month.
 * @return {Date} A new Date object representing the first day of the previous month.
 */
export declare const prevMonth: (fnDate: Date) => Date;
/**
 * Returns a new Date object representing the month after the given date.
 *
 * @param {Date} fnDate - The date from which to calculate the next month.
 * @return {Date} A new Date object representing the first day of the next month.
 */
export declare const nextMonth: (fnDate: Date) => Date;
/**
 * Returns the first and last day of the month for a given date.
 *
 * @param {Date} date - The date object from which to derive the month and year.
 * @return {[Date, Date]} An array containing the first and last day of the month.
 */
export declare const getFirstAndLastDay: (date: Date) => [Date, Date];
/**
 * Returns the first and last day of the month for a given date, using UTC date calculations.
 *
 * @param {Date} date - The date object from which to derive the month and year.
 * @return {[Date, Date]} An array containing the first and last day of the month.
 */
export declare const getFirstAndLastDayUTC: (date: Date) => [Date, Date];
/**
 * Generates an array of numbers over a specified range.
 *
 * @param {number} [start=0] - The starting number of the range (inclusive).
 * @param {number} [end=0] - The ending number of the range (exclusive).
 * @param {number} [step=1] - The difference between each number in the range.
 * @return {number[]} An array of numbers from `start` to `end` with the specified `step`.
 */
export declare const arrayRange: (start?: number, end?: number, step?: number) => number[];
/**
 * Generates an array of objects representing the days in a month.
 *
 * @param {Date} dateProp - The date object from which to derive the month and year.
 * @param {Date} monthEnd - The date object representing the last day of the month.
 * @return {Object[]} An array of objects containing the day of the month and a corresponding date object.
 */
export declare const getMonthDateRange: (dateProp: Date, monthEnd: Date) => {
    day: number;
    dateObj: Date;
}[];
/**
 * Generates an array of objects representing the days in a month, using UTC date calculations.
 *
 * @param {Date} dateProp - The date object from which to derive the month and year.
 * @param {Date} monthEnd - The date object representing the last day of the month.
 * @return {Object[]} An array of objects containing the day of the month and a corresponding date object.
 */
export declare const getMonthDateRangeUTC: (dateProp: Date, monthEnd: Date) => {
    day: number;
    dateObj: Date;
}[];
/**
 * Generates a calendar array based on the provided date list.
 *
 * @param {Array<Object>} dateList - A list of objects containing the day and date object.
 * @return {Array<Object>} An array of objects representing the days in a calendar format.
 */
export declare const generateCalendar: (dateList: {
    day: number;
    dateObj: Date;
}[]) => Array<{
    day: number | string;
    dateObj: Date;
}>;
/**
 * Returns true if the given dates have the same time.
 *
 * @param first - The first date to compare.
 * @param second - The second date to compare.
 * @return True if the given dates have the same time, false otherwise.
 */
export declare const isTimeEqual: (first: Date, second: Date) => boolean;
/**
 * Returns true if the given start date is greater that the end date.
 *
 * @param start - The start date to compare.
 * @param end - The end date to compare.
 * @return True if the given start date is greater than the end date.
 */
export declare const isStartDateGreaterThanEndDate: (start: Date, end: Date) => boolean;
/**
 * Returns true if the given date falls within the given start and end dates,
 * ignoring the time component of the dates.
 *
 * @param date - The date to check.
 * @param startDate - The start date of the range.
 * @param endDate - The end date of the range.
 * @return True if the given date is in the given range, false otherwise.
 */
export declare const isInDateRange: (date: Date, startDate: Date, endDate: Date) => boolean;
/**
 * Returns true if the given date falls within the given start and end dates,
 * ignoring the time component of the dates and using UTC date calculations.
 *
 * @param date - The date to check.
 * @param startDate - The start date of the range.
 * @param endDate - The end date of the range.
 * @return True if the given date is in the given range, false otherwise.
 */
export declare const isInDateRangeUTC: (date: Date, startDate: Date, endDate: Date) => boolean;
/**
 * Returns true if the given date is a Saturday or Sunday.
 *
 * @param date - The date to check.
 * @returns True if the given date is a Saturday or Sunday.
 */
export declare const isWeekend: (date: Date) => boolean;
/**
 * Formats a date range into a string, handling different cases for single day,
 * same month, and different month/year.
 *
 * @param startDate - The start date of the range.
 * @param endDate - The end date of the range.
 * @return A string representing the date range.
 */
export declare const formatDateRange: (startDate: Date, endDate: Date) => string;
/**
 * Returns the value of the date selection.
 *
 * If the start and end dates are the same, the function returns the DateValue.
 * If the start and end dates are different, the function returns the RangeValue<DateValue>.
 *
 * @param startDate - The start date of the range.
 * @param endDate - The end date of the range.
 * @return The value of the date range selection.
 */
export declare const selectedValue: (startDate: Date, endDate: Date) => DateValue | RangeValue<DateValue>;