$(function () {
  "user strict";
  
  /**
   * start password checking logic
   */
    password.init();
  
});

/**
 * Hold functions related to client side password validation
 */
var password = (function () {
    "use strict";

    var minPasswordLength = 6;
 
    var _hasLowerCase = /[a-z]/;
    var _hasUpperCase = /[A-Z]/;
    var _hasDigit = /\d/;
    // match special characters except space
    var _hasSpecial = /(_|[^\w\d ])/;
  
    var password = [];
    var password2 = [];

    var hasEightCharsListItem,
        hasUpperCaseListItem,
        hasLowerCaseListItem,
        hasSpecialListItem,
        hasDigitListItem;
  
    // Enforces that password2 = password, and display an error message if it does not
    var mustMatch = function () {

        if (password.val() !== password2.val()) {
            // show not matching error
            password2.addClass('invalid');
            return false;
        }

        password2.removeClass('invalid');
        return true;
    };

    // check validation and adjust classes
    var checkAndSwitchClasses = function (has, $element) {
        if (has) {
            $element.find(".glyphicon").removeClass("glyphicon-remove-circle").removeClass('invalid').addClass('valid').addClass("glyphicon-ok-circle");
            return true;
        }

        $element.find(".glyphicon").removeClass("glyphicon-ok-circle").removeClass('valid').addClass('invalid').addClass("glyphicon-remove-circle");
        return false;

    };

    // Enforces server side password rules on the client for convenience
    var enforceRules = function () {
      
        $('.invalid').removeClass('invalid');

        var pw = password.val().toLowerCase();

        var hasEight = pw.length >= minPasswordLength;
        var hasLower = _hasLowerCase.test(password.val());
        var hasUpper = _hasUpperCase.test(password.val());
        var hasDigit = _hasDigit.test(password.val());
        var hasSpecial = _hasSpecial.test(password.val());
      
        checkAndSwitchClasses(hasEight, hasEightCharsListItem);
        checkAndSwitchClasses(hasLower, hasLowerCaseListItem);
        checkAndSwitchClasses(hasUpper, hasUpperCaseListItem);
        checkAndSwitchClasses(hasDigit, hasDigitListItem);
        checkAndSwitchClasses(hasSpecial, hasSpecialListItem);
      
        if (pw.length === 0) $('.invalid').removeClass('invalid');
      
        // don't move forward until the password is actually *good*
/*        if (!(hasEight && hasLower && hasUpper && hasDigit && hasSpecial)) {
            return false;
        }*/

      if (mustMatch() && (hasEight && hasLower && hasUpper && hasDigit && hasSpecial)){
        $('#submit').addClass('valid');
      } else {
        $('#submit').removeClass('valid');
      }
    };

    return {
        
        init: function () {
            // hook all password/password2 fields on a page
            password = $('#password');
            password2 = $('#password-verify');
          
            // hook all req list items
            hasEightCharsListItem = $('#req-length');
            hasUpperCaseListItem = $('#req-upper');
            hasLowerCaseListItem = $('#req-lower');
            hasSpecialListItem = $('#req-special');
            hasDigitListItem = $('#req-digit');

            password.keyup(enforceRules);
            password2.keyup(enforceRules);

        }
    };
}());