'use strict';

const date = require('@internationalized/date');
const date_comparators = require('./comparators.cjs');
const date_utils = require('./utils.cjs');

function getDaysBetween(start, end) {
  const days = [];
  let dCurrent = start.add({ days: 1 });
  const dEnd = end;
  while (dCurrent.compare(dEnd) < 0) {
    days.push(dCurrent);
    dCurrent = dCurrent.add({ days: 1 });
  }
  return days;
}
function createMonth(props) {
  const { dateObj, weekStartsOn, fixedWeeks, locale } = props;
  const daysInMonth = date_comparators.getDaysInMonth(dateObj);
  const datesArray = Array.from({ length: daysInMonth }, (_, i) => dateObj.set({ day: i + 1 }));
  const firstDayOfMonth = date.startOfMonth(dateObj);
  const lastDayOfMonth = date.endOfMonth(dateObj);
  const lastSunday = date_comparators.getLastFirstDayOfWeek(firstDayOfMonth, weekStartsOn, locale);
  const nextSaturday = date_comparators.getNextLastDayOfWeek(lastDayOfMonth, weekStartsOn, locale);
  const lastMonthDays = getDaysBetween(lastSunday.subtract({ days: 1 }), firstDayOfMonth);
  const nextMonthDays = getDaysBetween(lastDayOfMonth, nextSaturday.add({ days: 1 }));
  const totalDays = lastMonthDays.length + datesArray.length + nextMonthDays.length;
  if (fixedWeeks && totalDays < 42) {
    const extraDays = 42 - totalDays;
    let startFrom = nextMonthDays[nextMonthDays.length - 1];
    if (!startFrom)
      startFrom = date.endOfMonth(dateObj);
    const extraDaysArray = Array.from({ length: extraDays }, (_, i) => {
      const incr = i + 1;
      return startFrom.add({ days: incr });
    });
    nextMonthDays.push(...extraDaysArray);
  }
  const allDays = lastMonthDays.concat(datesArray, nextMonthDays);
  const weeks = date_utils.chunk(allDays, 7);
  return {
    value: dateObj,
    cells: allDays,
    rows: weeks
  };
}
function startOfDecade(dateObj) {
  return date.startOfYear(dateObj.subtract({ years: dateObj.year - Math.floor(dateObj.year / 10) * 10 }).set({ day: 1, month: 1 }));
}
function endOfDecade(dateObj) {
  return date.endOfYear(dateObj.add({ years: Math.ceil((dateObj.year + 1) / 10) * 10 - dateObj.year - 1 }).set({ day: 35, month: 12 }));
}
function createDecade(props) {
  const { dateObj, startIndex, endIndex } = props;
  const decadeArray = Array.from({ length: Math.abs(startIndex ?? 0) + endIndex }, (_, i) => i <= Math.abs(startIndex ?? 0) ? dateObj.subtract({ years: i }).set({ day: 1, month: 1 }) : dateObj.add({ years: i - endIndex }).set({ day: 1, month: 1 }));
  decadeArray.sort((a, b) => a.year - b.year);
  return decadeArray;
}
function createYear(props) {
  const { dateObj, numberOfMonths = 1, pagedNavigation = false } = props;
  if (numberOfMonths && pagedNavigation) {
    const monthsArray2 = Array.from({ length: Math.floor(12 / numberOfMonths) }, (_, i) => date.startOfMonth(dateObj.set({ month: i * numberOfMonths + 1 })));
    return monthsArray2;
  }
  const monthsArray = Array.from({ length: 12 }, (_, i) => date.startOfMonth(dateObj.set({ month: i + 1 })));
  return monthsArray;
}
function createMonths(props) {
  const { numberOfMonths, dateObj, ...monthProps } = props;
  const months = [];
  if (!numberOfMonths || numberOfMonths === 1) {
    months.push(
      createMonth({
        ...monthProps,
        dateObj
      })
    );
    return months;
  }
  months.push(
    createMonth({
      ...monthProps,
      dateObj
    })
  );
  for (let i = 1; i < numberOfMonths; i++) {
    const nextMonth = dateObj.add({ months: i });
    months.push(
      createMonth({
        ...monthProps,
        dateObj: nextMonth
      })
    );
  }
  return months;
}
function createYearRange({ start, end }) {
  const years = [];
  if (!start || !end)
    return years;
  let current = date.startOfYear(start);
  while (current.compare(end) <= 0) {
    years.push(current);
    current = date.startOfYear(current.add({ years: 1 }));
  }
  return years;
}
function createDateRange({ start, end }) {
  const dates = [];
  if (!start || !end)
    return dates;
  let current = start;
  while (current.compare(end) <= 0) {
    dates.push(current);
    current = current.add({ days: 1 });
  }
  return dates;
}

exports.createDateRange = createDateRange;
exports.createDecade = createDecade;
exports.createMonth = createMonth;
exports.createMonths = createMonths;
exports.createYear = createYear;
exports.createYearRange = createYearRange;
exports.endOfDecade = endOfDecade;
exports.getDaysBetween = getDaysBetween;
exports.startOfDecade = startOfDecade;
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