import { GenericDateConstructor } from "date-fns";
import type {
  FormatOptions as DateFnsFormatOptions,
  Locale as DateFnsLocale
} from "date-fns";
import { addDays } from "date-fns/addDays";
import { addMonths } from "date-fns/addMonths";
import { addWeeks } from "date-fns/addWeeks";
import { addYears } from "date-fns/addYears";
import { differenceInCalendarDays } from "date-fns/differenceInCalendarDays";
import { differenceInCalendarMonths } from "date-fns/differenceInCalendarMonths";
import { endOfISOWeek } from "date-fns/endOfISOWeek";
import { endOfMonth } from "date-fns/endOfMonth";
import { endOfWeek } from "date-fns/endOfWeek";
import { endOfYear } from "date-fns/endOfYear";
import { format } from "date-fns/format";
import { getISOWeek } from "date-fns/getISOWeek";
import { getWeek } from "date-fns/getWeek";
import { isAfter } from "date-fns/isAfter";
import { isBefore } from "date-fns/isBefore";
import { isDate } from "date-fns/isDate";
import { isSameDay } from "date-fns/isSameDay";
import { isSameMonth } from "date-fns/isSameMonth";
import { isSameYear } from "date-fns/isSameYear";
import { max } from "date-fns/max";
import { min } from "date-fns/min";
import { setMonth } from "date-fns/setMonth";
import { setYear } from "date-fns/setYear";
import { startOfDay } from "date-fns/startOfDay";
import { startOfISOWeek } from "date-fns/startOfISOWeek";
import { startOfMonth } from "date-fns/startOfMonth";
import { startOfWeek } from "date-fns/startOfWeek";
import { startOfYear } from "date-fns/startOfYear";

/** The options for the {@link Formatters}. */
export type FormatOptions = DateFnsFormatOptions;

/** The options for the {@link Labels}. */
export type LabelOptions = DateFnsFormatOptions;

/** The locale used within DayPicker. */
export type Locale = DateFnsLocale;

export type { Month as DateFnsMonth } from "date-fns";

/**
 * The default date library to use with the date picker.
 *
 * @private
 * @internal
 */
export const dateLib = {
  /** The constructor of the date object. */
  Date: Date as GenericDateConstructor,
  addDays,
  addMonths,
  addWeeks,
  addYears,
  differenceInCalendarDays,
  differenceInCalendarMonths,
  endOfISOWeek,
  endOfMonth,
  endOfWeek,
  endOfYear,
  format,
  getISOWeek,
  getWeek,
  isAfter,
  isBefore,
  isDate,
  isSameDay,
  isSameMonth,
  isSameYear,
  max,
  min,
  setMonth,
  setYear,
  startOfDay,
  startOfISOWeek,
  startOfMonth,
  startOfWeek,
  startOfYear
};