import dayjs, { type Dayjs } from 'dayjs';
import localizedFormat from 'dayjs/plugin/localizedFormat.js';
import relativeTime from 'dayjs/plugin/relativeTime.js';
import updateLocale from 'dayjs/plugin/updateLocale.js';

dayjs.extend(localizedFormat);
dayjs.extend(relativeTime);
dayjs.extend(updateLocale);

// Export after the extensions have been registered so types are applied correctly.
export type { Dayjs };

/**
 * Function to build a Date given a number of seconds.
 *
 * @example secondsToDate(1582263571)
 */
export function secondsToDate(seconds: number | null) {
  return seconds ? toDate(seconds * 1000) : null;
}

/**
 * Function to build a Date given a string or number of milliseconds.
 *
 * @example toDate('2020-02-01')
 */
export function toDate(date: string | number | Dayjs | Date) {
  return dayjs(date);
}

/**
 * Function to return a UNIX timestamp from a date representation. This value is
 * floored to the nearest second.
 *
 * @example toUnix('2020-10-06')
 */
export function toUnix(date?: string | number | Dayjs | Date) {
  return dayjs(date).unix();
}