(function () {
	'use strict';

	/** Highest positive signed 32-bit float value */
	const maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1

	/** Bootstring parameters */
	const base = 36;
	const tMin = 1;
	const tMax = 26;
	const skew = 38;
	const damp = 700;
	const initialBias = 72;
	const initialN = 128; // 0x80
	const delimiter = '-'; // '\x2D'

	/** Regular expressions */
	const regexPunycode = /^xn--/;
	const regexNonASCII = /[^\0-\x7F]/; // Note: U+007F DEL is excluded too.
	const regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g; // RFC 3490 separators

	/** Error messages */
	const errors = {
	  'overflow': 'Overflow: input needs wider integers to process',
	  'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
	  'invalid-input': 'Invalid input'
	};

	/** Convenience shortcuts */
	const baseMinusTMin = base - tMin;
	const floor = Math.floor;
	const stringFromCharCode = String.fromCharCode;

	/*--------------------------------------------------------------------------*/

	/**
	 * A generic error utility function.
	 * @private
	 * @param {String} type The error type.
	 * @returns {Error} Throws a `RangeError` with the applicable error message.
	 */
	function error(type) {
	  throw new RangeError(errors[type]);
	}

	/**
	 * A generic `Array#map` utility function.
	 * @private
	 * @param {Array} array The array to iterate over.
	 * @param {Function} callback The function that gets called for every array
	 * item.
	 * @returns {Array} A new array of values returned by the callback function.
	 */
	function map(array, callback) {
	  const result = [];
	  let length = array.length;
	  while (length--) {
	    result[length] = callback(array[length]);
	  }
	  return result;
	}

	/**
	 * A simple `Array#map`-like wrapper to work with domain name strings or email
	 * addresses.
	 * @private
	 * @param {String} domain The domain name or email address.
	 * @param {Function} callback The function that gets called for every
	 * character.
	 * @returns {String} A new string of characters returned by the callback
	 * function.
	 */
	function mapDomain(domain, callback) {
	  const parts = domain.split('@');
	  let result = '';
	  if (parts.length > 1) {
	    // In email addresses, only the domain name should be punycoded. Leave
	    // the local part (i.e. everything up to `@`) intact.
	    result = parts[0] + '@';
	    domain = parts[1];
	  }
	  // Avoid `split(regex)` for IE8 compatibility. See #17.
	  domain = domain.replace(regexSeparators, '\x2E');
	  const labels = domain.split('.');
	  const encoded = map(labels, callback).join('.');
	  return result + encoded;
	}

	/**
	 * Creates an array containing the numeric code points of each Unicode
	 * character in the string. While JavaScript uses UCS-2 internally,
	 * this function will convert a pair of surrogate halves (each of which
	 * UCS-2 exposes as separate characters) into a single code point,
	 * matching UTF-16.
	 * @see `punycode.ucs2.encode`
	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
	 * @memberOf punycode.ucs2
	 * @name decode
	 * @param {String} string The Unicode input string (UCS-2).
	 * @returns {Array} The new array of code points.
	 */
	function ucs2decode(string) {
	  const output = [];
	  let counter = 0;
	  const length = string.length;
	  while (counter < length) {
	    const value = string.charCodeAt(counter++);
	    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
	      // It's a high surrogate, and there is a next character.
	      const extra = string.charCodeAt(counter++);
	      if ((extra & 0xFC00) == 0xDC00) {
	        // Low surrogate.
	        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
	      } else {
	        // It's an unmatched surrogate; only append this code unit, in case the
	        // next code unit is the high surrogate of a surrogate pair.
	        output.push(value);
	        counter--;
	      }
	    } else {
	      output.push(value);
	    }
	  }
	  return output;
	}

	/**
	 * Creates a string based on an array of numeric code points.
	 * @see `punycode.ucs2.decode`
	 * @memberOf punycode.ucs2
	 * @name encode
	 * @param {Array} codePoints The array of numeric code points.
	 * @returns {String} The new Unicode string (UCS-2).
	 */
	const ucs2encode = codePoints => String.fromCodePoint(...codePoints);

	/**
	 * Converts a basic code point into a digit/integer.
	 * @see `digitToBasic()`
	 * @private
	 * @param {Number} codePoint The basic numeric code point value.
	 * @returns {Number} The numeric value of a basic code point (for use in
	 * representing integers) in the range `0` to `base - 1`, or `base` if
	 * the code point does not represent a value.
	 */
	const basicToDigit = function basicToDigit(codePoint) {
	  if (codePoint >= 0x30 && codePoint < 0x3A) {
	    return 26 + (codePoint - 0x30);
	  }
	  if (codePoint >= 0x41 && codePoint < 0x5B) {
	    return codePoint - 0x41;
	  }
	  if (codePoint >= 0x61 && codePoint < 0x7B) {
	    return codePoint - 0x61;
	  }
	  return base;
	};

	/**
	 * Converts a digit/integer into a basic code point.
	 * @see `basicToDigit()`
	 * @private
	 * @param {Number} digit The numeric value of a basic code point.
	 * @returns {Number} The basic code point whose value (when used for
	 * representing integers) is `digit`, which needs to be in the range
	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
	 * used; else, the lowercase form is used. The behavior is undefined
	 * if `flag` is non-zero and `digit` has no uppercase form.
	 */
	const digitToBasic = function digitToBasic(digit, flag) {
	  //  0..25 map to ASCII a..z or A..Z
	  // 26..35 map to ASCII 0..9
	  return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
	};

	/**
	 * Bias adaptation function as per section 3.4 of RFC 3492.
	 * https://tools.ietf.org/html/rfc3492#section-3.4
	 * @private
	 */
	const adapt = function adapt(delta, numPoints, firstTime) {
	  let k = 0;
	  delta = firstTime ? floor(delta / damp) : delta >> 1;
	  delta += floor(delta / numPoints);
	  for /* no initialization */
	  (; delta > baseMinusTMin * tMax >> 1; k += base) {
	    delta = floor(delta / baseMinusTMin);
	  }
	  return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
	};

	/**
	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
	 * symbols.
	 * @memberOf punycode
	 * @param {String} input The Punycode string of ASCII-only symbols.
	 * @returns {String} The resulting string of Unicode symbols.
	 */
	const decode = function decode(input) {
	  // Don't use UCS-2.
	  const output = [];
	  const inputLength = input.length;
	  let i = 0;
	  let n = initialN;
	  let bias = initialBias;

	  // Handle the basic code points: let `basic` be the number of input code
	  // points before the last delimiter, or `0` if there is none, then copy
	  // the first basic code points to the output.

	  let basic = input.lastIndexOf(delimiter);
	  if (basic < 0) {
	    basic = 0;
	  }
	  for (let j = 0; j < basic; ++j) {
	    // if it's not a basic code point
	    if (input.charCodeAt(j) >= 0x80) {
	      error('not-basic');
	    }
	    output.push(input.charCodeAt(j));
	  }

	  // Main decoding loop: start just after the last delimiter if any basic code
	  // points were copied; start at the beginning otherwise.

	  for /* no final expression */
	  (let index = basic > 0 ? basic + 1 : 0; index < inputLength;) {
	    // `index` is the index of the next character to be consumed.
	    // Decode a generalized variable-length integer into `delta`,
	    // which gets added to `i`. The overflow checking is easier
	    // if we increase `i` as we go, then subtract off its starting
	    // value at the end to obtain `delta`.
	    const oldi = i;
	    for /* no condition */
	    (let w = 1, k = base;; k += base) {
	      if (index >= inputLength) {
	        error('invalid-input');
	      }
	      const digit = basicToDigit(input.charCodeAt(index++));
	      if (digit >= base) {
	        error('invalid-input');
	      }
	      if (digit > floor((maxInt - i) / w)) {
	        error('overflow');
	      }
	      i += digit * w;
	      const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
	      if (digit < t) {
	        break;
	      }
	      const baseMinusT = base - t;
	      if (w > floor(maxInt / baseMinusT)) {
	        error('overflow');
	      }
	      w *= baseMinusT;
	    }
	    const out = output.length + 1;
	    bias = adapt(i - oldi, out, oldi == 0);

	    // `i` was supposed to wrap around from `out` to `0`,
	    // incrementing `n` each time, so we'll fix that now:
	    if (floor(i / out) > maxInt - n) {
	      error('overflow');
	    }
	    n += floor(i / out);
	    i %= out;

	    // Insert `n` at position `i` of the output.
	    output.splice(i++, 0, n);
	  }
	  return String.fromCodePoint(...output);
	};

	/**
	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
	 * Punycode string of ASCII-only symbols.
	 * @memberOf punycode
	 * @param {String} input The string of Unicode symbols.
	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
	 */
	const encode = function encode(input) {
	  const output = [];

	  // Convert the input in UCS-2 to an array of Unicode code points.
	  input = ucs2decode(input);

	  // Cache the length.
	  const inputLength = input.length;

	  // Initialize the state.
	  let n = initialN;
	  let delta = 0;
	  let bias = initialBias;

	  // Handle the basic code points.
	  for (const currentValue of input) {
	    if (currentValue < 0x80) {
	      output.push(stringFromCharCode(currentValue));
	    }
	  }
	  const basicLength = output.length;
	  let handledCPCount = basicLength;

	  // `handledCPCount` is the number of code points that have been handled;
	  // `basicLength` is the number of basic code points.

	  // Finish the basic string with a delimiter unless it's empty.
	  if (basicLength) {
	    output.push(delimiter);
	  }

	  // Main encoding loop:
	  while (handledCPCount < inputLength) {
	    // All non-basic code points < n have been handled already. Find the next
	    // larger one:
	    let m = maxInt;
	    for (const currentValue of input) {
	      if (currentValue >= n && currentValue < m) {
	        m = currentValue;
	      }
	    }

	    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
	    // but guard against overflow.
	    const handledCPCountPlusOne = handledCPCount + 1;
	    if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
	      error('overflow');
	    }
	    delta += (m - n) * handledCPCountPlusOne;
	    n = m;
	    for (const currentValue of input) {
	      if (currentValue < n && ++delta > maxInt) {
	        error('overflow');
	      }
	      if (currentValue === n) {
	        // Represent delta as a generalized variable-length integer.
	        let q = delta;
	        for /* no condition */
	        (let k = base;; k += base) {
	          const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
	          if (q < t) {
	            break;
	          }
	          const qMinusT = q - t;
	          const baseMinusT = base - t;
	          output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)));
	          q = floor(qMinusT / baseMinusT);
	        }
	        output.push(stringFromCharCode(digitToBasic(q, 0)));
	        bias = adapt(delta, handledCPCountPlusOne, handledCPCount === basicLength);
	        delta = 0;
	        ++handledCPCount;
	      }
	    }
	    ++delta;
	    ++n;
	  }
	  return output.join('');
	};

	/**
	 * Converts a Punycode string representing a domain name or an email address
	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
	 * it doesn't matter if you call it on a string that has already been
	 * converted to Unicode.
	 * @memberOf punycode
	 * @param {String} input The Punycoded domain name or email address to
	 * convert to Unicode.
	 * @returns {String} The Unicode representation of the given Punycode
	 * string.
	 */
	const toUnicode = function toUnicode(input) {
	  return mapDomain(input, function (string) {
	    return regexPunycode.test(string) ? decode(string.slice(4).toLowerCase()) : string;
	  });
	};

	/**
	 * Converts a Unicode string representing a domain name or an email address to
	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
	 * i.e. it doesn't matter if you call it with a domain that's already in
	 * ASCII.
	 * @memberOf punycode
	 * @param {String} input The domain name or email address to convert, as a
	 * Unicode string.
	 * @returns {String} The Punycode representation of the given domain name or
	 * email address.
	 */
	const toASCII = function toASCII(input) {
	  return mapDomain(input, function (string) {
	    return regexNonASCII.test(string) ? 'xn--' + encode(string) : string;
	  });
	};

	/*--------------------------------------------------------------------------*/

	/** Define the public API */
	const punycode = {
	  /**
	   * A string representing the current Punycode.js version number.
	   * @memberOf punycode
	   * @type String
	   */
	  'version': '2.3.1',
	  /**
	   * An object of methods to convert from JavaScript's internal character
	   * representation (UCS-2) to Unicode code points, and back.
	   * @see <https://mathiasbynens.be/notes/javascript-encoding>
	   * @memberOf punycode
	   * @type Object
	   */
	  'ucs2': {
	    'decode': ucs2decode,
	    'encode': ucs2encode
	  },
	  'decode': decode,
	  'encode': encode,
	  'toASCII': toASCII,
	  'toUnicode': toUnicode
	};

	/**
	 * @copyright  (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
	 * @license    GNU General Public License version 2 or later; see LICENSE.txt
	 */
	class JFormValidator {
	  constructor() {
	    this.customValidators = {};
	    this.handlers = [];
	    this.handlers = {};
	    this.removeMarking = this.removeMarking.bind(this);
	    this.inputEmail = () => {
	      const input = document.createElement('input');
	      input.setAttribute('type', 'email');
	      return input.type !== 'text';
	    };

	    // Default handlers
	    this.setHandler('username', value => {
	      const regex = /[<|>|"|'|%|;|(|)|&]/i;
	      return !regex.test(value);
	    });
	    this.setHandler('password', value => {
	      const regex = /^\S[\S ]{2,98}\S$/;
	      return regex.test(value);
	    });
	    this.setHandler('numeric', value => {
	      const regex = /^(\d|-)?(\d|,)*\.?\d*$/;
	      return regex.test(value);
	    });
	    this.setHandler('email', value => {
	      const newValue = punycode.toASCII(value);
	      const regex = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;
	      return regex.test(newValue);
	    });

	    // Attach all forms with a class 'form-validate'
	    document.querySelectorAll('form').forEach(form => {
	      if (form.classList.contains('form-validate')) {
	        this.attachToForm(form);
	      }
	    });
	  }
	  get custom() {
	    return this.customValidators;
	  }
	  set custom(value) {
	    this.customValidators = value;
	  }
	  setHandler(name, func, en) {
	    const isEnabled = en === '' ? true : en;
	    this.handlers[name] = {
	      enabled: isEnabled,
	      exec: func
	    };
	  }

	  // eslint-disable-next-line class-methods-use-this
	  markValid(element) {
	    // Get a label
	    const label = element.form.querySelector(`label[for="${element.id}"]`);
	    let message;
	    if (element.classList.contains('required') || element.getAttribute('required')) {
	      if (label) {
	        message = label.querySelector('span.form-control-feedback');
	      }
	    }
	    element.classList.remove('form-control-danger', 'invalid');
	    element.classList.add('form-control-success');
	    element.parentNode.classList.remove('has-danger');
	    element.parentNode.classList.add('has-success');
	    element.setAttribute('aria-invalid', 'false');

	    // Remove message
	    if (message) {
	      message.parentNode.removeChild(message);
	    }

	    // Restore Label
	    if (label) {
	      label.classList.remove('invalid');
	    }
	  }

	  // eslint-disable-next-line class-methods-use-this
	  markInvalid(element, empty) {
	    // Get a label
	    const label = element.form.querySelector(`label[for="${element.id}"]`);
	    element.classList.remove('form-control-success', 'valid');
	    element.classList.add('form-control-danger', 'invalid');
	    element.parentNode.classList.remove('has-success');
	    element.parentNode.classList.add('has-danger');
	    element.setAttribute('aria-invalid', 'true');

	    // Display custom message
	    let mesgCont;
	    const message = element.getAttribute('data-validation-text');
	    if (label) {
	      mesgCont = label.querySelector('span.form-control-feedback');
	    }
	    if (!mesgCont) {
	      const elMsg = document.createElement('span');
	      elMsg.classList.add('form-control-feedback');
	      if (empty && empty === 'checkbox') {
	        elMsg.innerHTML = message !== null ? Joomla.sanitizeHtml(message) : Joomla.sanitizeHtml(Joomla.Text._('JLIB_FORM_FIELD_REQUIRED_CHECK'));
	      } else if (empty && empty === 'value') {
	        elMsg.innerHTML = message !== null ? Joomla.sanitizeHtml(message) : Joomla.sanitizeHtml(Joomla.Text._('JLIB_FORM_FIELD_REQUIRED_VALUE'));
	      } else {
	        elMsg.innerHTML = message !== null ? Joomla.sanitizeHtml(message) : Joomla.sanitizeHtml(Joomla.Text._('JLIB_FORM_FIELD_INVALID_VALUE'));
	      }
	      if (label) {
	        label.appendChild(elMsg);
	      }
	    }

	    // Mark the Label as well
	    if (label) {
	      label.classList.add('invalid');
	    }
	  }

	  // eslint-disable-next-line class-methods-use-this
	  removeMarking(element) {
	    // Get the associated label
	    let message;
	    const label = element.form.querySelector(`label[for="${element.id}"]`);
	    if (label) {
	      message = label.querySelector('span.form-control-feedback');
	    }
	    element.classList.remove('form-control-danger', 'form-control-success', 'remove');
	    element.classList.add('valid');
	    element.parentNode.classList.remove('has-danger', 'has-success');

	    // Remove message
	    if (message && label) {
	      label.removeChild(message);
	    }

	    // Restore Label
	    if (label) {
	      label.classList.remove('invalid');
	    }
	  }
	  handleResponse(state, element, empty) {
	    const tagName = element.tagName.toLowerCase();

	    // Set the element and its label (if exists) invalid state
	    if (tagName !== 'button' && element.value !== undefined || tagName === 'fieldset') {
	      if (state === false) {
	        this.markInvalid(element, empty);
	      } else {
	        this.markValid(element);
	      }
	    }
	  }
	  validate(element) {
	    let tagName;

	    // Ignore the element if its currently disabled,
	    // because are not submitted for the http-request.
	    // For those case return always true.
	    if (element.getAttribute('disabled') === 'disabled' || element.getAttribute('display') === 'none') {
	      this.handleResponse(true, element);
	      return true;
	    }
	    // If the field is required make sure it has a value
	    if (element.getAttribute('required') || element.classList.contains('required')) {
	      tagName = element.tagName.toLowerCase();
	      if (tagName === 'fieldset' && (element.classList.contains('radio') || element.classList.contains('checkboxes'))) {
	        // No options are checked.
	        if (element.querySelector('input:checked') === null) {
	          this.handleResponse(false, element, 'checkbox');
	          return false;
	        }
	      } else if (element.getAttribute('type') === 'checkbox' && element.checked !== true || tagName === 'select' && !element.value.length) {
	        this.handleResponse(false, element, 'checkbox');
	        return false;
	      } else if (!element.value || element.classList.contains('placeholder')) {
	        // If element has class placeholder that means it is empty.
	        this.handleResponse(false, element, 'value');
	        return false;
	      }
	    }

	    // Only validate the field if the validate class is set
	    const handler = element.getAttribute('class') && element.getAttribute('class').match(/validate-([a-zA-Z0-9_-]+)/) ? element.getAttribute('class').match(/validate-([a-zA-Z0-9_-]+)/)[1] : '';
	    if (element.getAttribute('pattern') && element.getAttribute('pattern') !== '') {
	      if (element.value.length) {
	        const isValid = new RegExp(`^${element.getAttribute('pattern')}$`).test(element.value);
	        this.handleResponse(isValid, element, 'empty');
	        return isValid;
	      }
	      if (element.hasAttribute('required') || element.classList.contains('required')) {
	        this.handleResponse(false, element, 'empty');
	        return false;
	      }
	      this.handleResponse(true, element);
	      return true;
	    }
	    if (handler === '') {
	      this.handleResponse(true, element);
	      return true;
	    }

	    // Check the additional validation types
	    if (handler && handler !== 'none' && this.handlers[handler] && element.value) {
	      // Execute the validation handler and return result
	      if (this.handlers[handler].exec(element.value, element) !== true) {
	        this.handleResponse(false, element, 'invalid_value');
	        return false;
	      }
	    }

	    // Return validation state
	    this.handleResponse(true, element);
	    return true;
	  }
	  isValid(form) {
	    let valid = true;
	    let message;
	    let error;
	    let fields;
	    const invalid = [];

	    // Validate form fields
	    if (form.nodeName === 'FORM') {
	      fields = [].slice.call(form.elements);
	    } else {
	      fields = form.querySelectorAll('input, textarea, select, button, fieldset');
	    }
	    fields.forEach(field => {
	      if (this.validate(field) === false) {
	        valid = false;
	        invalid.push(field);
	      }
	    });

	    // Run custom form validators if present
	    if (Object.keys(this.customValidators).length) {
	      Object.keys(this.customValidators).foreach(key => {
	        if (this.customValidators[key].exec() !== true) {
	          valid = false;
	        }
	      });
	    }
	    if (!valid && invalid.length > 0) {
	      if (form.getAttribute('data-validation-text')) {
	        message = form.getAttribute('data-validation-text');
	      } else {
	        message = Joomla.Text._('JLIB_FORM_CONTAINS_INVALID_FIELDS');
	      }
	      error = {
	        error: [message]
	      };
	      Joomla.renderMessages(error);
	    }
	    return valid;
	  }
	  attachToForm(form) {
	    let elements;
	    if (form.nodeName === 'FORM') {
	      elements = [].slice.call(form.elements);
	    } else {
	      elements = form.querySelectorAll('input, textarea, select, button, fieldset');
	    }

	    // Iterate through the form object and attach the validate method to all input fields.
	    elements.forEach(element => {
	      const tagName = element.tagName.toLowerCase();
	      if (['input', 'textarea', 'select', 'fieldset'].indexOf(tagName) > -1 && element.classList.contains('required')) {
	        element.setAttribute('required', '');
	      }

	      // Attach isValid method to submit button
	      if ((tagName === 'input' || tagName === 'button') && (element.getAttribute('type') === 'submit' || element.getAttribute('type') === 'image')) {
	        if (element.classList.contains('validate')) {
	          element.addEventListener('click', () => this.isValid(form));
	        }
	      } else if (tagName !== 'button' && !(tagName === 'input' && element.getAttribute('type') === 'button')) {
	        // Attach validate method only to fields
	        if (tagName !== 'fieldset') {
	          element.addEventListener('blur', ({
	            target
	          }) => this.validate(target));
	          element.addEventListener('focus', ({
	            target
	          }) => this.removeMarking(target));
	          if (element.classList.contains('validate-email') && this.inputEmail) {
	            element.setAttribute('type', 'email');
	          }
	        }
	      }
	    });
	  }
	}
	const initialize = () => {
	  document.formvalidator = new JFormValidator();

	  // Cleanup
	  document.removeEventListener('DOMContentLoaded', initialize);
	};
	document.addEventListener('DOMContentLoaded', initialize);

	/**
	 * Expose the classes to the global scope
	 * These will be removed in Joomla! 6.0
	 */
	window.JFormValidator = JFormValidator;
	window.punycode = punycode;

})();
