/* eslint-disable eslint-comments/no-unlimited-disable */
/* eslint-disable */
// @ts-nocheck

import { defaultLocale } from '../_lib/defaultLocale/index.ts';
import { getDefaultOptions } from '../_lib/defaultOptions/index.ts';
import { normalizeDates } from '../_lib/normalizeDates/index.ts';
import { differenceInCalendarDays } from '../differenceInCalendarDays/index.ts';
import { format } from '../format/index.ts';
import type { FormatRelativeToken } from '../locale/types.ts';
import type { ContextOptions, DateArg, LocalizedOptions, WeekOptions } from '../types.ts';

/**
 * The {@link formatRelative} function options.
 */
export interface FormatRelativeOptions
  extends LocalizedOptions<'options' | 'localize' | 'formatLong' | 'formatRelative'>,
    WeekOptions,
    ContextOptions<Date> {}

/**
 * @name formatRelative
 * @category Common Helpers
 * @summary Represent the date in words relative to the given base date.
 *
 * @description
 * Represent the date in words relative to the given base date.
 *
 * | Distance to the base date | Result                    |
 * |---------------------------|---------------------------|
 * | Previous 6 days           | last Sunday at 04:30 AM   |
 * | Last day                  | yesterday at 04:30 AM     |
 * | Same day                  | today at 04:30 AM         |
 * | Next day                  | tomorrow at 04:30 AM      |
 * | Next 6 days               | Sunday at 04:30 AM        |
 * | Other                     | 12/31/2017                |
 *
 * @param date - The date to format
 * @param baseDate - The date to compare with
 * @param options - An object with options
 *
 * @returns The date in words
 *
 * @throws `date` must not be Invalid Date
 * @throws `baseDate` must not be Invalid Date
 * @throws `options.locale` must contain `localize` property
 * @throws `options.locale` must contain `formatLong` property
 * @throws `options.locale` must contain `formatRelative` property
 *
 * @example
 * // Represent the date of 6 days ago in words relative to the given base date. In this example, today is Wednesday
 * const result = formatRelative(subDays(new Date(), 6), new Date())
 * //=> "last Thursday at 12:45 AM"
 */
export function formatRelative(
  date: DateArg<Date> & {},
  baseDate: DateArg<Date> & {},
  options?: FormatRelativeOptions,
): string {
  const [date_, baseDate_] = normalizeDates(options?.in, date, baseDate);

  const defaultOptions = getDefaultOptions();
  const locale = options?.locale ?? defaultOptions.locale ?? defaultLocale;
  const weekStartsOn =
    options?.weekStartsOn ??
    options?.locale?.options?.weekStartsOn ??
    defaultOptions.weekStartsOn ??
    defaultOptions.locale?.options?.weekStartsOn ??
    0;

  const diff = differenceInCalendarDays(date_, baseDate_);

  if (isNaN(diff)) {
    throw new RangeError('Invalid time value');
  }

  let token: FormatRelativeToken;
  if (diff < -6) {
    token = 'other';
  } else if (diff < -1) {
    token = 'lastWeek';
  } else if (diff < 0) {
    token = 'yesterday';
  } else if (diff < 1) {
    token = 'today';
  } else if (diff < 2) {
    token = 'tomorrow';
  } else if (diff < 7) {
    token = 'nextWeek';
  } else {
    token = 'other';
  }

  const formatStr = locale.formatRelative(token, date_, baseDate_, {
    locale,
    weekStartsOn,
  });
  return format(date_, formatStr, { locale, weekStartsOn });
}

/* eslint-enable */