'use strict';
var global = require('../internals/global');
var uncurryThis = require('../internals/function-uncurry-this');
var fails = require('../internals/fails');
var padStart = require('../internals/string-pad').start;

var RangeError = global.RangeError;
var abs = Math.abs;
var DatePrototype = Date.prototype;
var n$DateToISOString = DatePrototype.toISOString;
var getTime = uncurryThis(DatePrototype.getTime);
var getUTCDate = uncurryThis(DatePrototype.getUTCDate);
var getUTCFullYear = uncurryThis(DatePrototype.getUTCFullYear);
var getUTCHours = uncurryThis(DatePrototype.getUTCHours);
var getUTCMilliseconds = uncurryThis(DatePrototype.getUTCMilliseconds);
var getUTCMinutes = uncurryThis(DatePrototype.getUTCMinutes);
var getUTCMonth = uncurryThis(DatePrototype.getUTCMonth);
var getUTCSeconds = uncurryThis(DatePrototype.getUTCSeconds);

// `Date.prototype.toISOString` method implementation
// https://tc39.es/ecma262/#sec-date.prototype.toisostring
// PhantomJS / old WebKit fails here:
module.exports = (fails(function () {
  return n$DateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
}) || !fails(function () {
  n$DateToISOString.call(new Date(NaN));
})) ? function toISOString() {
  if (!isFinite(getTime(this))) throw RangeError('Invalid time value');
  var date = this;
  var year = getUTCFullYear(date);
  var milliseconds = getUTCMilliseconds(date);
  var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
  return sign + padStart(abs(year), sign ? 6 : 4, 0) +
    '-' + padStart(getUTCMonth(date) + 1, 2, 0) +
    '-' + padStart(getUTCDate(date), 2, 0) +
    'T' + padStart(getUTCHours(date), 2, 0) +
    ':' + padStart(getUTCMinutes(date), 2, 0) +
    ':' + padStart(getUTCSeconds(date), 2, 0) +
    '.' + padStart(milliseconds, 3, 0) +
    'Z';
} : n$DateToISOString;