/*!
 * All material copyright ESRI, All Rights Reserved, unless otherwise specified.
 * See https://github.com/Esri/calcite-components/blob/master/LICENSE.md for details.
 * v1.0.0-beta.82
 */
'use strict';

const index = require('./index-5c65e149.js');
const locale = require('./locale-f2ebe4fa.js');

/**
 * Get supported locale code from raw user input
 * Exported for testing purposes.
 * @private
 */
function getSupportedLocale(lang = "") {
  if (locale.locales.indexOf(lang) > -1) {
    return lang;
  }
  lang = lang.toLowerCase();
  if (lang.includes("-")) {
    lang = lang.replace(/(\w+)-(\w+)/, (_match, language, region) => `${language}-${region.toUpperCase()}`);
    if (!locale.locales.includes(lang)) {
      lang = lang.split("-")[0];
    }
  }
  return locale.locales.includes(lang) ? lang : "en";
}
/**
 * CLDR cache.
 * Exported for testing purposes.
 * @private
 */
const translationCache = {};
/**
 * CLDR request cache.
 * Exported for testing purposes.
 * @private
 */
const requestCache = {};
/**
 * Fetch calendar data for a given locale from list of supported languages
 * @public
 */
async function getLocaleData(lang) {
  const locale = getSupportedLocale(lang);
  if (translationCache[locale]) {
    return translationCache[locale];
  }
  if (!requestCache[locale]) {
    requestCache[locale] = fetch(index.getAssetPath(`./assets/date-picker/nls/${locale}.json`))
      .then((resp) => resp.json())
      .catch(() => {
      console.error(`Translations for "${locale}" not found or invalid, falling back to english`);
      return getLocaleData("en");
    });
  }
  const data = await requestCache[locale];
  translationCache[locale] = data;
  return data;
}

/**
 * Check if date is within a min and max
 */
function inRange(date, min, max) {
  const time = date.getTime();
  const afterMin = !(min instanceof Date) || time >= min.getTime();
  const beforeMax = !(max instanceof Date) || time <= max.getTime();
  return afterMin && beforeMax;
}
/**
 * Ensures date is within range,
 * returns min or max if out of bounds
 */
function dateFromRange(date, min, max) {
  if (!(date instanceof Date)) {
    return null;
  }
  const time = date.getTime();
  const beforeMin = min instanceof Date && time < min.getTime();
  const afterMax = max instanceof Date && time > max.getTime();
  if (beforeMin) {
    return min;
  }
  if (afterMax) {
    return max;
  }
  return date;
}
/**
 * Parse an iso8601 string (YYYY-mm-dd) into a valid date.
 * TODO: handle time when time of day UI is added
 */
function dateFromISO(iso8601) {
  if (iso8601 instanceof Date) {
    return iso8601;
  }
  if (!iso8601 || typeof iso8601 !== "string") {
    return null;
  }
  const d = iso8601.split(/[: T-]/).map(parseFloat);
  const date = new Date(d[0], (d[1] || 1) - 1, d[2] || 1);
  date.setFullYear(d[0]);
  if (isNaN(date.getTime())) {
    throw new Error(`Invalid ISO 8601 date: "${iso8601}"`);
  }
  return date;
}
/**
 * Return first portion of ISO string (YYYY-mm-dd)
 */
function dateToISO(date) {
  if (typeof date === "string") {
    return date;
  }
  if (date instanceof Date) {
    return new Date(date.getTime() - date.getTimezoneOffset() * 60000).toISOString().split("T")[0];
  }
  return "";
}
/**
 * Check if two dates are the same day, month, year
 */
function sameDate(d1, d2) {
  return (d1 instanceof Date &&
    d2 instanceof Date &&
    d1.getDate() === d2.getDate() &&
    d1.getMonth() === d2.getMonth() &&
    d1.getFullYear() === d2.getFullYear());
}
/**
 * Get a date one month in the past
 */
function prevMonth(date) {
  const month = date.getMonth();
  const nextDate = new Date(date);
  nextDate.setMonth(month - 1);
  // date doesn't exist in new month, use last day
  if (month === nextDate.getMonth()) {
    return new Date(date.getFullYear(), month, 0);
  }
  return nextDate;
}
/**
 * Get a date one month in the future
 */
function nextMonth(date) {
  const month = date.getMonth();
  const nextDate = new Date(date);
  nextDate.setMonth(month + 1);
  // date doesn't exist in new month, use last day
  if ((month + 2) % 7 === nextDate.getMonth() % 7) {
    return new Date(date.getFullYear(), month + 2, 0);
  }
  return nextDate;
}
/**
 * Translate a number into a given locals numeral system
 */
function localizeNumber(num, localeData) {
  return String(num)
    .split("")
    .map((i) => localeData.numerals[i])
    .join("");
}
/**
 * Calculate actual number from localized string
 */
function parseNumber(str, localeData) {
  const numerals = "0123456789";
  return parseInt(str
    .split("")
    .map((i) => numerals[localeData.numerals.indexOf(i)])
    .filter((num) => num)
    .join(""));
}
/**
 * Parse numeric units for day, month, and year from a localized string
 * month starts at 0 (can pass to date constructor)
 */
function parseDateString(str, localeData) {
  const { separator, unitOrder } = localeData;
  const order = getOrder(unitOrder);
  const values = replaceArabicNumerals(str).split(separator);
  return {
    day: parseInt(values[order.indexOf("d")]),
    month: parseInt(values[order.indexOf("m")]) - 1,
    year: parseInt(values[order.indexOf("y")])
  };
}
/**
 * Convert eastern arbic numerals
 */
function replaceArabicNumerals(str = "") {
  return str
    .replace(/[\u0660-\u0669]/g, (c) => (c.charCodeAt(0) - 0x0660))
    .replace(/[\u06f0-\u06f9]/g, (c) => (c.charCodeAt(0) - 0x06f0));
}
/**
 * Based on the unitOrder string, find order of month, day, and year for locale
 */
function getOrder(unitOrder) {
  const signifiers = ["d", "m", "y"];
  const order = unitOrder.toLowerCase();
  return signifiers.sort((a, b) => order.indexOf(a) - order.indexOf(b));
}
/**
 * Get number of days between two dates
 */
function getDaysDiff(date1, date2) {
  const ts1 = date1.getTime();
  const ts2 = date2.getTime();
  return (ts1 - ts2) / (1000 * 3600 * 24);
}

const HEADING_LEVEL = 2;
const TEXT = {
  nextMonth: "Next month",
  prevMonth: "Previous month",
  year: "Year"
};

exports.HEADING_LEVEL = HEADING_LEVEL;
exports.TEXT = TEXT;
exports.dateFromISO = dateFromISO;
exports.dateFromRange = dateFromRange;
exports.dateToISO = dateToISO;
exports.getDaysDiff = getDaysDiff;
exports.getLocaleData = getLocaleData;
exports.getOrder = getOrder;
exports.inRange = inRange;
exports.localizeNumber = localizeNumber;
exports.nextMonth = nextMonth;
exports.parseDateString = parseDateString;
exports.parseNumber = parseNumber;
exports.prevMonth = prevMonth;
exports.sameDate = sameDate;