import { Nullable } from '../../types/general';
export declare type DateCompareResult = {
  isPreviousMonth: boolean;
  isNextMonth: boolean;
  inMonth: boolean;
};
export declare const WEEKDAYS_SHORT: string[];
/**
 * Calendar date class
 */
export declare class CalendarDate {
  private static readonly MONTHS;
  private _year;
  private _month;
  private _date;
  constructor(year: number, month: number, date: number);
  /**
   * Create a calendar date from a Date object
   *
   * @param {Date} currentDate - The Date object to create CalendarDate from
   * @param {string} timezone - Timezone identifier for timezone-aware date creation. If not provided, uses system timezone.
   * @returns {CalendarDate} - Return a CalendarDate object
   */
  static from(currentDate: Date, timezone?: string): CalendarDate;
  /**
   * Converts a date string to CalendarDate with optional format and timezone parameters.
   *
   * @param {string} dateString - The string date.
   * @param {string} [format] - The format of string date
   * @param {string} [lang] - lang
   * @returns {Nullable<CalendarDate>} - CalendarDate.
   */
  static fromString(dateString: string, format?: string, lang?: string): Nullable<CalendarDate>;
  /**
   * Get regex pattern by format token.
   *
   * @param {string} token - The format token.
   * @param {string} lang - Language.
   * @returns {FormatPatternType} - regex pattern.
   */
  private static getPatternByFormatToken;
  /**
   * Shorts months.
   *
   * @param {string} lang - Language
   * @returns {string[]} - Shorts months.
   */
  private static shortMonths;
  /**
   * Long months.
   *
   * @param {string} lang - Language
   * @returns {string[]} - Long months.
   */
  private static longMonths;
  /**
   * The year of the calendar date
   *
   * @type {number}
   */
  get year(): number;
  set year(value: number);
  /**
   * The month of the calendar date
   *
   * @type {number}
   */
  get month(): number;
  set month(value: number);
  /**
   * The date of the calendar date
   *
   * @type {number}
   */
  get date(): number;
  set date(value: number);
  /**
   * Converts CalendarDate to a string with an optional format specifier.
   *
   * @param {string} [format] - The format of string date
   * @param {string} [lang] - Language
   * @returns {string} The string date.
   */
  toString(format?: string, lang?: string): string;
  /**
   * Verify whether the calendar date is today
   *
   * @param {string} timezone - Timezone to consider when checking today's date. If not provided, uses system timezone.
   * @returns {boolean} - Return true if the calendar date is today. Otherwise, return false.
   */
  isToday(timezone?: string): boolean;
  /**
   * Convert the calendar date to a Date object
   *
   * @returns {Date} - Return a Date object
   */
  toDate(): Date;
  /**
   * Compare with another calendar date
   *
   * @param {CalendarDate} date - The calendar date to compare with
   * @returns {DateCompareResult} - Return a DateCompareResult object
   */
  compare(date: CalendarDate): DateCompareResult;
  /**
   * The function "equal" compares the year, month, and date of two CalendarDate objects and returns  true if they are equal.
   *
   * @param {Nullable<CalendarDate>} calendarDate - The `equal` method in the code snippet is a function that compares the year, month, and date of the current `CalendarDate` object with another
   * `CalendarDate` object passed as a parameter. The method returns `true` if all three values (year, month, date) are equal
   * @returns {boolean} The date is same day with current
   */
  equal(calendarDate: Nullable<CalendarDate>): boolean;
  /**
   * Get month name.
   *
   * @param {boolean} isShortName - Whether to get the short name or long name of the month
   * @returns {string} The name of the month
   */
  getMonthName(isShortName?: boolean): string;
  /**
   * To determine if it is larger than a given `CalendarDate`.
   *
   * @param {Nullable<CalendarDate>} calendarDate - A `CalendarDate`
   * @returns {boolean} - Compared result
   */
  isAfter(calendarDate: Nullable<CalendarDate>): boolean;
  /**
   * To determine if it is less than a given `CalendarDate`.
   *
   * @param {Nullable<CalendarDate>} calendarDate - A `CalendarDate`
   * @returns {boolean} - Compared result
   */
  isBefore(calendarDate: Nullable<CalendarDate>): boolean;
  /**
   * Get first day of month.
   *
   * @returns {CalendarDate} - First day of month.
   */
  firstDateOfMonth(): CalendarDate;
  /**
   * Get last day of month.
   *
   * @returns {CalendarDate} - Last day of month.
   */
  lastDateOfMonth(): CalendarDate;
  /**
   * Adjusts the calendar date by adding the specified number of years, months, and days.
   *
   * @param {number} [years=0] - The number of years to add.
   * @param {number} [months=0] - The number of months to add.
   * @param {number} [days=0] - The number of days to add.
   * @returns {CalendarDate} - A new CalendarDate object with the adjusted date.
   */
  add(years?: number, months?: number, days?: number): CalendarDate;
  /**
   * Get the short name of the week day for the calendar date.
   *
   * @returns {string} - The short name of the week day.
   */
  getWeekDayShortName(): string;
  /**
   * Get year, month and day value by format token.
   *
   * @param {string} token - The format token.
   * @param {string} lang - Language.
   * @returns {string} - year, month and day value.
   */
  private getDateItemByFormatToken;
}