/**
 * jQuery Form Validator Module: Security
 * ------------------------------------------
 * Created by Victor Jonsson <http://victorjonsson.se>
 *
 * This module adds validators typically used in registration forms.
 * This module adds the following validators:
 *  - spamcheck
 *  - confirmation
 *  - strength
 *  - backend
 *  - credit card
 *  - cvv
 *
 * @website http://formvalidator.net/#security-validators
 * @license MIT
 */
(function($, window) {

    'use strict';

    /*
     * Simple spam check
     */
    $.formUtils.addValidator({
        name : 'spamcheck',
        validatorFunction : function(val, $el) {
            var attr = $el.valAttr('captcha');
            return attr === val;
        },
        errorMessage : '',
        errorMessageKey: 'badSecurityAnswer'
    });

    /*
     * Validate confirmation (tests that two inputs are identical; usually used for
     * passwords)
     */
    $.formUtils.addValidator({
        name : 'confirmation',
        validatorFunction : function(value, $el, config, language, $form) {
            var password,
                passwordInputName = $el.valAttr('confirm') ||
                                   ($el.attr('name') + '_confirmation'),
                $passwordInput = $form.find('[name="' +passwordInputName+ '"]');
            if (!$passwordInput.length) {
                $.formUtils.warn('Password confirmation validator: could not find an input ' +
                  'with name "'+passwordInputName+'"');
                return false;
            }

            password = $passwordInput.val();
            if( config.validateOnBlur && !$passwordInput[0].hasValidationCallback ) {
                $passwordInput[0].hasValidationCallback = true;
                var keyUpCallback = function() {
                    $el.validate();
                };
                $passwordInput.on('keyup', keyUpCallback);
                $form.one('formValidationSetup', function() {
                    $passwordInput[0].hasValidationCallback = false;
                    $passwordInput.off('keyup', keyUpCallback);
                });
            }

            return value === password;
        },
        errorMessage : '',
        errorMessageKey: 'notConfirmed'
    });

    var creditCards = {
            'amex' : [15,15],
            'diners_club' : [14,14],
            'cjb' : [16,16],
            'laser' : [16,19],
            'visa' : [16,16],
            'mastercard' : [16,16],
            'maestro' : [12,19],
            'discover' : [16,16]
        },
        checkOnlyAmex = false,
        allowsAmex = false;

    /*
     * Credit card
     */
    $.formUtils.addValidator({
        name : 'creditcard',
        validatorFunction : function(value, $el) {
            var allowing = $.split( $el.valAttr('allowing') || '' );

            // Setup for cvv validation
            allowsAmex = $.inArray('amex', allowing) > -1;
            checkOnlyAmex = allowsAmex && allowing.length === 1;

            // Correct length
            if( allowing.length > 0 ) {
                var hasValidLength = false;
                $.each(allowing, function(i, cardName) {
                    if( cardName in creditCards) {
                        if( value.length >= creditCards[cardName][0] && value.length <= creditCards[cardName][1]) {
                            hasValidLength = true;
                            return false;
                        }
                    } else if( window.console ) {
                        console.warn('Use of unknown credit card "'+cardName+'"');
                    }
                });

                if ( !hasValidLength ) {
                    return false;
                }
            }

            // only numbers
            if ( value.replace(new RegExp('[0-9]', 'g'), '') !== '' ) {
                return false;
            }

            // http://en.wikipedia.org/wiki/Luhn_algorithm
            // http://www.brainjar.com/js/validation/default2.asp
            var checkSum = 0;
            $.each(value.split('').reverse(), function(i, digit) {
                digit = parseInt(digit, 10);
                if( i%2 === 0 ) {
                    checkSum += digit;
                } else {
                    digit *= 2;
                    if (digit < 10) {
                        checkSum += digit;
                    } else {
                        checkSum += digit - 9;
                    }
                }
            });
            return checkSum % 10 === 0;
        },
        errorMessage : '',
        errorMessageKey: 'badCreditCard'
    });

    /*
     * Credit card number
     */
    $.formUtils.addValidator({
        name : 'cvv',
        validatorFunction : function(val) {
            if( val.replace(/[0-9]/g, '') === '' ) {
                val = val + '';
                if( checkOnlyAmex ) {
                    return val.length === 4;
                } else if( allowsAmex ) {
                    return val.length === 3 || val.length === 4;
                } else {
                    return val.length === 3;
                }
            }
            return false;
        },
        errorMessage : '',
        errorMessageKey: 'badCVV'
    });

    /*
     * Validate password strength
     */
    $.formUtils.addValidator({
        name : 'strength',
        validatorFunction : function(val, $el) {
            var requiredStrength = $el.valAttr('strength') || 2;
            if (requiredStrength && requiredStrength > 3) {
                requiredStrength = 3;
            }

            return $.formUtils.validators.validate_strength.calculatePasswordStrength(val) >= requiredStrength;
        },
        errorMessage : '',
        errorMessageKey: 'badStrength',

        /**
         * Code more or less borrowed from jQuery plugin "Password Strength Meter"
         * written by Darren Mason (djmason9@gmail.com), myPocket technologies (www.mypocket-technologies.com)
         * @param {String} password
         * @return {Number}
         */
        calculatePasswordStrength : function(password) {

            if (password.length < 4) {
                return 0;
            }

            var score = 0;

            var checkRepetition = function (pLen, str) {
                var res = '';
                for (var i = 0; i < str.length; i++) {
                    var repeated = true;

                    for (var j = 0; j < pLen && (j + i + pLen) < str.length; j++) {
                        repeated = repeated && (str.charAt(j + i) === str.charAt(j + i + pLen));
                    }
                    if (j < pLen) {
                        repeated = false;
                    }
                    if (repeated) {
                        i += pLen - 1;
                        repeated = false;
                    }
                    else {
                        res += str.charAt(i);
                    }
                }
                return res;
            };

            //password length
            score += password.length * 4;
            score += ( checkRepetition(1, password).length - password.length ) * 1;
            score += ( checkRepetition(2, password).length - password.length ) * 1;
            score += ( checkRepetition(3, password).length - password.length ) * 1;
            score += ( checkRepetition(4, password).length - password.length ) * 1;

            //password has 3 numbers
            if (password.match(/(.*[0-9].*[0-9].*[0-9])/)) {
                score += 5;
            }

            //password has 2 symbols
            if (password.match(/(.*[!,@,#,$,%,^,&,*,?,_,~].*[!,@,#,$,%,^,&,*,?,_,~])/)) {
                score += 5;
            }

            //password has Upper and Lower chars
            if (password.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/)) {
                score += 10;
            }

            //password has number and chars
            if (password.match(/([a-zA-Z])/) && password.match(/([0-9])/)) {
                score += 15;
            }
            //
            //password has number and symbol
            if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([0-9])/)) {
                score += 15;
            }

            //password has char and symbol
            if (password.match(/([!,@,#,$,%,^,&,*,?,_,~])/) && password.match(/([a-zA-Z])/)) {
                score += 15;
            }

            //password is just a numbers or chars
            if (password.match(/^\w+$/) || password.match(/^\d+$/)) {
                score -= 10;
            }

            //verifying 0 < score < 100
            if (score < 0) {
                score = 0;
            }
            if (score > 100) {
                score = 100;
            }

            if (score < 20) {
                return 0;
            }
            else if (score < 40) {
                return 1;
            }
            else if(score <= 60) {
                return 2;
            }
            else {
                return 3;
            }
        },

        strengthDisplay : function($el, options) {
            var config = {
                fontSize: '12pt',
                padding: '4px',
                bad : 'Very bad',
                weak : 'Weak',
                good : 'Good',
                strong : 'Strong'
            };

            if (options) {
                $.extend(config, options);
            }

            $el.bind('keyup', function() {
                var val = $(this).val(),
                    $parent = typeof config.parent === 'undefined' ? $(this).parent() : $(config.parent),
                    $displayContainer = $parent.find('.strength-meter'),
                    strength = $.formUtils.validators.validate_strength.calculatePasswordStrength(val),
                    css = {
                      background: 'pink',
                      color : '#FF0000',
                      fontWeight : 'bold',
                      border : 'red solid 1px',
                      borderWidth : '0px 0px 4px',
                      display : 'inline-block',
                      fontSize : config.fontSize,
                      padding : config.padding
                    },
                    text = config.bad;

                if($displayContainer.length === 0) {
                    $displayContainer = $('<span></span>');
                    $displayContainer
                        .addClass('strength-meter')
                        .appendTo($parent);
                }

                if( !val ) {
                    $displayContainer.hide();
                } else {
                    $displayContainer.show();
                }

                if(strength === 1) {
                    text = config.weak;
                }
                else if(strength === 2) {
                    css.background = 'lightyellow';
                    css.borderColor = 'yellow';
                    css.color = 'goldenrod';
                    text = config.good;
                }
                else if(strength >= 3) {
                    css.background = 'lightgreen';
                    css.borderColor = 'darkgreen';
                    css.color = 'darkgreen';
                    text = config.strong;
                }

                $displayContainer
                    .css(css)
                    .text(text);
            });
        }
    });

    var requestServer = function(serverURL, $element, val, conf, callback) {
        var reqParams = $element.valAttr('req-params') || $element.data('validation-req-params') || {},
            handleResponse = function(response, callback) {
              if(response.valid) {
                $element.valAttr('backend-valid', 'true');
              }
              else {
                $element.valAttr('backend-invalid', 'true');
                if (response.message) {
                  $element.attr(conf.validationErrorMsgAttribute, response.message);
                }
              }

              if( !$element.valAttr('has-keyup-event') ) {
                $element
                  .valAttr('has-keyup-event', '1')
                  .bind('keyup change', function(evt) {
                    if( evt.keyCode !== 9 && evt.keyCode !== 16 ) {
                      $(this)
                        .valAttr('backend-valid', false)
                        .valAttr('backend-invalid', false);
                    }
                  });
              }

              callback();
            };

        if ( !reqParams ) {
            reqParams = {};
        }
        if ( typeof reqParams === 'string' ) {
            reqParams = $.parseJSON(reqParams);
        }
        reqParams[$element.valAttr('param-name') || $element.attr('name')] = val;

        $.ajax({
            url : serverURL,
            type : 'POST',
            cache : false,
            data : reqParams,
            dataType : 'json',
            error : function(error) {
              handleResponse({valid: false, message:'Connection failed with status: ' + error.statusText}, callback);
              return false;
            },
            success : function(response) {
              handleResponse(response, callback);
            }
        });
    },
    disableFormSubmit = function() {
        return false;
    };

    /*
     * Server validation
     * Flow (form submission):
     *  1) Check if the value already has been validated on the server. If so, display the validation
     *     result and continue the validation process, otherwise continue to step 2
     *  2) Return false as if the value is invalid and set $.formUtils.haltValidation to true
     *  3) Disable form submission on the form being validated
     *  4) Request the server with value and input name and add class 'validating-server-side' to the form
     *  5) When the server responds an attribute will be added to the element
     *      telling the validator that the input has a valid/invalid value and enable form submission
     *  6) Run form submission again (back to step 1)
     */
    $.formUtils.addValidator({
        name : 'server',
        validatorFunction : function(val, $el, conf, lang, $form) {

            var backendValid = $el.valAttr('backend-valid'),
                backendInvalid = $el.valAttr('backend-invalid'),
                serverURL = document.location.href;

            if($el.valAttr('url')) {
                serverURL = $el.valAttr('url');
            } else if('serverURL' in conf) {
                serverURL = conf.backendUrl;
            }

            if (backendValid) {
                return true;
            }
            else if (backendInvalid) {
                return false;
            }
            else if($.formUtils.eventType === 'keyup' && !$.formUtils.isValidatingEntireForm) {
                return null;
            }

            if ($.formUtils.isValidatingEntireForm) {
                $form
                    .bind('submit', disableFormSubmit)
                    .addClass('validating-server-side')
                    .addClass('on-blur');

                $el.addClass('validating-server-side');
                $.formUtils.haltValidation = true;

                requestServer(serverURL, $el, val, conf, function() {

                    $form
                        .removeClass('validating-server-side')
                        .removeClass('on-blur')
                        .get(0).onsubmit = function() {};

                    $form.unbind('submit', disableFormSubmit);
                    $el.removeClass('validating-server-side');

                    $el.valAttr('value-length', val.length);

                    // fire submission again!
                    $.formUtils.haltValidation = false;
                    $form.trigger('submit');
                });

                return null;

            } else {
                // validation on blur
                $form.addClass('validating-server-side');
                $el.addClass('validating-server-side');
                requestServer(serverURL, $el, val, conf, function() {
                    $form.removeClass('validating-server-side');
                    $el.removeClass('validating-server-side');
                    $el.trigger('blur');
                });
                return null;
            }
        },
        errorMessage : '',
        errorMessageKey: 'badBackend',
        validateOnKeyUp : false
    });

    /*
     * Check for only letters and numbers
     *
     * http://www.slovo.info/testuni.htm
     */
    $.formUtils.addValidator({
      name : 'letternumeric',
      validatorFunction : function(val, $el, config, language) {
        var patternStart = '^([a-zA-Z0-9\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC',
          patternEnd = ']+)$',
          additionalChars = $el.valAttr('allowing'),
          pattern = '';

        if (additionalChars) {
          pattern = patternStart + additionalChars + patternEnd;
          var extra = additionalChars.replace(/\\/g, '');
          if (extra.indexOf(' ') > -1) {
            extra = extra.replace(' ', '');
            extra += language.andSpaces || $.formUtils.LANG.andSpaces;
          }
          this.errorMessage = language.badAlphaNumeric + language.badAlphaNumericExtra + extra;
        } else {
          pattern = patternStart + patternEnd;
          this.errorMessage = language.badAlphaNumeric;
        }

        return new RegExp(pattern).test(val);
      },
      errorMessage : '',
      errorMessageKey: 'requiredFields'
    });

    /*
     * Google reCaptcha 2
     */
    $.formUtils.addValidator({
        name: 'recaptcha',
        validatorFunction: function (val, $el)
        {
            return grecaptcha.getResponse($el.valAttr('recaptcha-widgetId'));
        },
        errorMessage: '',
        errorMessageKey: 'badreCaptcha'
    });

    $.fn.displayPasswordStrength = function(conf) {
        new $.formUtils.validators.validate_strength.strengthDisplay(this, conf);
        return this;
    };

  var setupGooglereCaptcha = function (evt, $forms, config) {
    if (typeof grecaptcha !== typeof undefined && !$.formUtils.hasLoadedGrecaptcha) {
      throw new Error('reCaptcha API can not be loaded by hand, delete reCaptcha API snippet.');
    } else if (!$.formUtils.hasLoadedGrecaptcha) {
      $.formUtils.hasLoadedGrecaptcha = true;

      var src = '//www.google.com/recaptcha/api.js?onload=reCaptchaLoaded&render=explicit' + (config.lang ? '&hl=' + config.lang : '');
      var script = document.createElement('script');
      script.type = 'text/javascript';
      script.async = true;
      script.defer = true;
      script.src = src;
      document.getElementsByTagName('body')[0].appendChild(script);
    }
  };

  window.reCaptchaLoaded = function ($forms) {
    if (!$forms || typeof $forms) {
      $forms = $('form');
    }

    $forms.each(function () {
      var $form = $(this),
        config = $form.context.validationConfig;

      $('[data-validation~="recaptcha"]', $form).each(function () {
        var $input = $(this),
          div = document.createElement('DIV'),
          siteKey = config.reCaptchaSiteKey || $input.valAttr('recaptcha-sitekey'),
          theme = config.reCaptchaTheme || $input.valAttr('recaptcha-theme') || 'light';

        if (!siteKey) {
          throw new Error('Google reCaptcha site key is required.');
        }

        var widgetId = grecaptcha.render(div, {
          sitekey: siteKey,
          theme: theme
        });

        $input
          .valAttr('recaptcha-widget-id', widgetId)
          .hide()
          .on('beforeValidation', function(evt) {
            // prevent validator from skipping this input becaus its hidden
            evt.stopImmediatePropagation();
          })
          .parent()
          .append(div);

      });

    });
  };

  $(window).on('validatorsLoaded formValidationSetup', setupGooglereCaptcha);

})(jQuery, window);
