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import toDate from '../toDate/index'
import toInteger from '../_lib/toInteger/index'
import requiredArgs from '../_lib/requiredArgs/index'
import { LocaleOptions, WeekStartOptions } from '../types'
/**
* @name endOfWeek
* @category Week Helpers
* @summary Return the end of a week for the given date.
*
* @description
* Return the end of a week for the given date.
* The result will be in the local timezone.
*
* ### v2.0.0 breaking changes:
*
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
*
* @param {Date|Number} date - the original date
* @param {Object} [options] - an object with options.
* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
* @returns {Date} the end of a week
* @throws {TypeError} 1 argument required
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
*
* @example
* // The end of a week for 2 September 2014 11:55:00:
* const result = endOfWeek(new Date(2014, 8, 2, 11, 55, 0))
* //=> Sat Sep 06 2014 23:59:59.999
*
* @example
* // If the week starts on Monday, the end of the week for 2 September 2014 11:55:00:
* const result = endOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 })
* //=> Sun Sep 07 2014 23:59:59.999
*/
export default function endOfWeek(
dirtyDate: Date | number,
dirtyOptions?: LocaleOptions & WeekStartOptions
): Date {
requiredArgs(1, arguments)
const options = dirtyOptions || {}
const locale = options.locale
const localeWeekStartsOn =
locale && locale.options && locale.options.weekStartsOn
const defaultWeekStartsOn =
localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn)
const weekStartsOn =
options.weekStartsOn == null
? defaultWeekStartsOn
: toInteger(options.weekStartsOn)
// Test if weekStartsOn is between 0 and 6 _and_ is not NaN
if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
throw new RangeError('weekStartsOn must be between 0 and 6 inclusively')
}
const date = toDate(dirtyDate)
const day = date.getDay()
const diff = (day < weekStartsOn ? -7 : 0) + 6 - (day - weekStartsOn)
date.setDate(date.getDate() + diff)
date.setHours(23, 59, 59, 999)
return date
}
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