import differenceInCalendarDays from 'date-fns/differenceInCalendarDays';
import isBefore from 'date-fns/isBefore';
var FORMATS = /*#__PURE__*/function (FORMATS) {
  FORMATS["ISO_FORMAT"] = "YYYY-MM-DD";
  FORMATS["LOCALIZED_FORMAT"] = "LOCALIZED_FORMAT";
  return FORMATS;
}(FORMATS || {});
export const timestampToUTCDate = timestamp => {
  const date = new Date(Number(timestamp));
  const day = date.getUTCDate();
  const month = date.getUTCMonth() + 1;
  const year = date.getUTCFullYear();
  return {
    day,
    month,
    year
  };
};
export const todayTimestampInUTC = () => {
  const today = new Date(Date.now());
  const todayInUTC = Date.UTC(today.getFullYear(), today.getMonth(), today.getDate());
  return todayInUTC.toString();
};
const addLeadingZero = val => {
  if (val < 10) {
    return `0${val}`;
  }
  return val;
};
const capitalizeFirstLetter = str => {
  return str.charAt(0).toUpperCase() + str.slice(1);
};

// example: "23 Jan 2018"
export const timestampToString = (timestamp, intl, pattern) => {
  if (!intl || pattern === FORMATS.ISO_FORMAT) {
    return timestampToIsoFormat(timestamp);
  }
  const date = new Date(Number(timestamp));
  return intl.formatDate(date, {
    timeZone: 'UTC',
    month: 'short',
    day: 'numeric',
    year: 'numeric',
    formatMatcher: 'best fit'
  });
};

// example: "2018-01-23"
export const timestampToIsoFormat = timestamp => {
  const date = new Date(Number(timestamp));
  return `${date.getUTCFullYear()}-${addLeadingZero(date.getUTCMonth() + 1)}-${date.getUTCDate()}`;
};
export const isPastDate = timestamp => {
  return isBefore(new Date(Number(timestamp)), new Date(Number(todayTimestampInUTC())));
};
export const timestampToTaskContext = (timestamp, intl) => {
  const curDate = new Date(Number(todayTimestampInUTC()));
  const givenDate = new Date(Number(timestamp));
  const distance = differenceInCalendarDays(givenDate, curDate);
  if (intl && [-1, 0, 1].indexOf(distance) > -1) {
    return capitalizeFirstLetter(intl.formatRelativeTime(distance, 'day', {
      numeric: 'auto'
    }));
  }
  return timestampToString(timestamp, intl, FORMATS.LOCALIZED_FORMAT);
};