/**
 * filesize
 *
 * @copyright 2022 Jason Mulligan <jason.mulligan@avoidwork.com>
 * @license BSD-3-Clause
 * @version 8.0.7
 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.filesize = factory());
})(this, (function () { 'use strict';

	var b = /^(b|B)$/,
	    symbol = {
	  iec: {
	    bits: ["bit", "Kibit", "Mibit", "Gibit", "Tibit", "Pibit", "Eibit", "Zibit", "Yibit"],
	    bytes: ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"]
	  },
	  jedec: {
	    bits: ["bit", "Kbit", "Mbit", "Gbit", "Tbit", "Pbit", "Ebit", "Zbit", "Ybit"],
	    bytes: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
	  }
	},
	    fullform = {
	  iec: ["", "kibi", "mebi", "gibi", "tebi", "pebi", "exbi", "zebi", "yobi"],
	  jedec: ["", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta"]
	},
	    roundingFuncs = {
	  floor: Math.floor,
	  ceil: Math.ceil
	};
	/**
	 * filesize
	 *
	 * @method filesize
	 * @param  {Mixed}   arg        String, Int or Float to transform
	 * @param  {Object}  descriptor [Optional] Flags
	 * @return {String}             Readable file size String
	 */

	function filesize(arg) {
	  var descriptor = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
	  var result = [],
	      val = 0,
	      e,
	      base,
	      bits,
	      ceil,
	      full,
	      fullforms,
	      locale,
	      localeOptions,
	      neg,
	      num,
	      output,
	      pad,
	      round,
	      u,
	      unix,
	      separator,
	      spacer,
	      standard,
	      symbols,
	      roundingFunc,
	      precision;

	  if (isNaN(arg)) {
	    throw new TypeError("Invalid number");
	  }

	  bits = descriptor.bits === true;
	  unix = descriptor.unix === true;
	  pad = descriptor.pad === true;
	  base = descriptor.base || 10;
	  round = descriptor.round !== void 0 ? descriptor.round : unix ? 1 : 2;
	  locale = descriptor.locale !== void 0 ? descriptor.locale : "";
	  localeOptions = descriptor.localeOptions || {};
	  separator = descriptor.separator !== void 0 ? descriptor.separator : "";
	  spacer = descriptor.spacer !== void 0 ? descriptor.spacer : unix ? "" : " ";
	  symbols = descriptor.symbols || {};
	  standard = base === 2 ? descriptor.standard || "iec" : "jedec";
	  output = descriptor.output || "string";
	  full = descriptor.fullform === true;
	  fullforms = descriptor.fullforms instanceof Array ? descriptor.fullforms : [];
	  e = descriptor.exponent !== void 0 ? descriptor.exponent : -1;
	  roundingFunc = roundingFuncs[descriptor.roundingMethod] || Math.round;
	  num = Number(arg);
	  neg = num < 0;
	  ceil = base > 2 ? 1000 : 1024;
	  precision = isNaN(descriptor.precision) === false ? parseInt(descriptor.precision, 10) : 0; // Flipping a negative number to determine the size

	  if (neg) {
	    num = -num;
	  } // Determining the exponent


	  if (e === -1 || isNaN(e)) {
	    e = Math.floor(Math.log(num) / Math.log(ceil));

	    if (e < 0) {
	      e = 0;
	    }
	  } // Exceeding supported length, time to reduce & multiply


	  if (e > 8) {
	    if (precision > 0) {
	      precision += 8 - e;
	    }

	    e = 8;
	  }

	  if (output === "exponent") {
	    return e;
	  } // Zero is now a special case because bytes divide by 1


	  if (num === 0) {
	    result[0] = 0;
	    u = result[1] = unix ? "" : symbol[standard][bits ? "bits" : "bytes"][e];
	  } else {
	    val = num / (base === 2 ? Math.pow(2, e * 10) : Math.pow(1000, e));

	    if (bits) {
	      val = val * 8;

	      if (val >= ceil && e < 8) {
	        val = val / ceil;
	        e++;
	      }
	    }

	    var p = Math.pow(10, e > 0 ? round : 0);
	    result[0] = roundingFunc(val * p) / p;

	    if (result[0] === ceil && e < 8 && descriptor.exponent === void 0) {
	      result[0] = 1;
	      e++;
	    }

	    u = result[1] = base === 10 && e === 1 ? bits ? "kbit" : "kB" : symbol[standard][bits ? "bits" : "bytes"][e];

	    if (unix) {
	      result[1] = result[1].charAt(0);

	      if (b.test(result[1])) {
	        result[0] = Math.floor(result[0]);
	        result[1] = "";
	      }
	    }
	  } // Decorating a 'diff'


	  if (neg) {
	    result[0] = -result[0];
	  } // Setting optional precision


	  if (precision > 0) {
	    result[0] = result[0].toPrecision(precision);
	  } // Applying custom symbol


	  result[1] = symbols[result[1]] || result[1];

	  if (locale === true) {
	    result[0] = result[0].toLocaleString();
	  } else if (locale.length > 0) {
	    result[0] = result[0].toLocaleString(locale, localeOptions);
	  } else if (separator.length > 0) {
	    result[0] = result[0].toString().replace(".", separator);
	  }

	  if (pad && Number.isInteger(result[0]) === false && round > 0) {
	    var x = separator || ".",
	        tmp = result[0].toString().split(x),
	        s = tmp[1] || "",
	        l = s.length,
	        n = round - l;
	    result[0] = "".concat(tmp[0]).concat(x).concat(s.padEnd(l + n, "0"));
	  }

	  if (full) {
	    result[1] = fullforms[e] ? fullforms[e] : fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s");
	  } // Returning Array, Object, or String (default)


	  return output === "array" ? result : output === "object" ? {
	    value: result[0],
	    symbol: result[1],
	    exponent: e,
	    unit: u
	  } : result.join(spacer);
	} // Partial application for functional programming


	filesize.partial = function (opt) {
	  return function (arg) {
	    return filesize(arg, opt);
	  };
	};

	return filesize;

}));
