/* @projectDescription jQuery Password Strength Plugin - A jQuery plugin to provide accessibility functions
* @author Tane Piper (digitalspaghetti@gmail.com)
* @version 2.0
* @website: http://digitalspaghetti.me.uk/digitalspaghetti
* @license MIT License: http://www.opensource.org/licenses/mit-license.php
* 
* === Changelog ===
* Version 2.1 (18/05/2008)
* Added a jQuery method to add a new rule: jQuery('input[@type=password]').pstrength.addRule(name, method, score, active)
* Added a jQuery method to change a rule score: jQuery('input[@type=password]').pstrength.changeScore('one_number', 50);
* Added a jQuery method to change a rules active state: jQuery('input[@type=password]').pstrength.ruleActive('one_number', false);
* Hide the 'password to short' span if the password is more than the min chars
* 
* Version 2.0 (17/05/2008)
* Completly re-wrote the plugin from scratch.  Plugin now features lamda functions for validation and
* custom validation rules 
* Plugin now exists in new digitalspaghetti. namespace to stop any conflits with other plugins.
* Updated documentation
* 
* Version 1.4 (12/02/2008)
* Added some improvments to i18n stuff from Raffael Luthiger.
* Version 1.3 (02/01/2008)
* Changing coding style to more OO
* Added default messages object for i18n
* Changed password length score to Math.pow (thanks to Keith Mashinter for this suggestion)
* Version 1.2 (03/09/2007)
* Added more options for colors and common words
* Added common words checked to see if words like 'password' or 'qwerty' are being entered
* Added minimum characters required for password
* Re-worked scoring system to give better results
* Version 1.1 (20/08/2007)
* Changed code to be more jQuery-like
* Version 1.0 (20/07/2007)
* Initial version.
*/

// Create our namespaced object
/*global window */
/*global jQuery */
/*global digitalspaghetti*/
window.digitalspaghetti = window.digitalspaghetti || {};
digitalspaghetti.password = {
    'defaults': {
        'displayMinChar': true,
        'minChar': 8,
        'minCharText': 'Minimum of %d characters and 1 non-alphanumberic',
        'colors': ["#f00", "#c06", "#f60", "#3c0", "#3f0"],
        'scores': [20, 30, 43, 50],
        'verdicts': ['Weak', 'Normal', 'Medium', 'Strong', 'Very Strong'],
        'raisePower': 1.4,
        'debug': false
    },
    'ruleScores': {
        'length': 0,
        'lowercase': 1,
        'uppercase': 3,
        'one_number': 3,
        'three_numbers': 5,
        'one_special_char': 3,
        'two_special_char': 5,
        'upper_lower_combo': 2,
        'letter_number_combo': 2,
        'letter_number_char_combo': 2
    },
    'rules': {
        'length': true,
        'lowercase': true,
        'uppercase': true,
        'one_number': true,
        'three_numbers': true,
        'one_special_char': true,
        'two_special_char': true,
        'upper_lower_combo': true,
        'letter_number_combo': true,
        'letter_number_char_combo': true
    },
    'validationRules': {
        'length': function(word, score) {
            digitalspaghetti.password.tooShort = false;
            var wordlen = word.length;
            var lenScore = Math.pow(wordlen, digitalspaghetti.password.options.raisePower);
            if (wordlen < digitalspaghetti.password.options.minChar) {
                lenScore = (lenScore - 100);
                digitalspaghetti.password.tooShort = true;
            }
            return lenScore;
        },
        'lowercase': function(word, score) {
            return word.match(/[a-z]/) && score;
        },
        'uppercase': function(word, score) {
            return word.match(/[A-Z]/) && score;
        },
        'one_number': function(word, score) {
            return word.match(/\d+/) && score;
        },
        'three_numbers': function(word, score) {
            return word.match(/(.*[0-9].*[0-9].*[0-9])/) && score;
        },
        'one_special_char': function(word, score) {
            return word.match(/.[!,@,#,$,%,\^,&,*,?,_,~]/) && score;
        },
        'two_special_char': function(word, score) {
            return word.match(/(.*[!,@,#,$,%,\^,&,*,?,_,~].*[!,@,#,$,%,\^,&,*,?,_,~])/) && score;
        },
        'upper_lower_combo': function(word, score) {
            return word.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/) && score;
        },
        'letter_number_combo': function(word, score) {
            return word.match(/([a-zA-Z])/) && word.match(/([0-9])/) && score;
        },
        'letter_number_char_combo': function(word, score) {
            return word.match(/([a-zA-Z0-9].*[!,@,#,$,%,\^,&,*,?,_,~])|([!,@,#,$,%,\^,&,*,?,_,~].*[a-zA-Z0-9])/) && score;
        }
    },
    'attachWidget': function(element) {
        var output = ['<div id="password-strength">'];
        if (digitalspaghetti.password.options.displayMinChar && !digitalspaghetti.password.tooShort) {
            output.push('<span class="password-min-char">' + digitalspaghetti.password.options.minCharText.replace('%d', digitalspaghetti.password.options.minChar) + '</span>');
        }
        output.push('<span class="password-strength-bar"></span>');
        output.push('</div>');
        output = output.join('');
        jQuery(element).after(output);
    },
    'debugOutput': function(element) {
        if (typeof console.log === 'function') {
            console.log(digitalspaghetti.password);
        } else {
            alert(digitalspaghetti.password);
        }
    },
    'addRule': function(name, method, score, active) {
        digitalspaghetti.password.rules[name] = active;
        digitalspaghetti.password.ruleScores[name] = score;
        digitalspaghetti.password.validationRules[name] = method;
        return true;
    },
    'init': function(element, options) {

        digitalspaghetti.password.options = jQuery.extend({}, digitalspaghetti.password.defaults, options);
        digitalspaghetti.password.attachWidget(element);
        jQuery(element).keyup(function() {
            digitalspaghetti.password.calculateScore(jQuery(this).val());
        });
        
        if (digitalspaghetti.password.options.debug) {
            digitalspaghetti.password.debugOutput();
        }
    },
    'calculateScore': function(word) {
        digitalspaghetti.password.totalscore = 0;
        digitalspaghetti.password.width = 0;
        for (var key in digitalspaghetti.password.rules) if (digitalspaghetti.password.rules.hasOwnProperty(key)) {
            if (digitalspaghetti.password.rules[key] === true) {
                var score = digitalspaghetti.password.ruleScores[key];
                var result = digitalspaghetti.password.validationRules[key](word, score);
                if (result) {
                    digitalspaghetti.password.totalscore += result;
                }
            }
            if (digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[0]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[0];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[0];
                digitalspaghetti.password.width = "25";
            } else if (digitalspaghetti.password.totalscore > digitalspaghetti.password.options.scores[0] && digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[1]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[1];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[1];
                digitalspaghetti.password.width = "25";
            } else if (digitalspaghetti.password.totalscore > digitalspaghetti.password.options.scores[1] && digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[2]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[2];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[2];
                digitalspaghetti.password.width = "50";
            } else if (digitalspaghetti.password.totalscore > digitalspaghetti.password.options.scores[2] && digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[3]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[3];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[3];
                digitalspaghetti.password.width = "75";
            } else {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[4];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[4];
                digitalspaghetti.password.width = "99";
            }
            jQuery('.password-strength-bar').stop();

            if (digitalspaghetti.password.options.displayMinChar && !digitalspaghetti.password.tooShort) {
                jQuery('.password-min-char').show();
            } else {
                jQuery('.password-min-char').show();
            }

            jQuery('.password-strength-bar').animate({ opacity: 0.5 }, 'fast', 'linear', function() {
                jQuery(this).css({ 'display': 'block', 'background-color': digitalspaghetti.password.strColor, 'width': digitalspaghetti.password.width + "%" }).text(digitalspaghetti.password.strText);
                jQuery(this).animate({ opacity: 1 }, 'fast', 'linear');
            });
        }
    }
};

jQuery.extend(jQuery.fn, {
    'pstrength': function(options) {
        return this.each(function() {
            digitalspaghetti.password.init(this, options);
        });
    }
});
jQuery.extend(jQuery.fn.pstrength, {
    'addRule': function(name, method, score, active) {
        digitalspaghetti.password.addRule(name, method, score, active);
        return true;
    },
    'changeScore': function(rule, score) {
        digitalspaghetti.password.ruleScores[rule] = score;
        return true;
    },
    'ruleActive': function(rule, active) {
        digitalspaghetti.password.rules[rule] = active;
        return true;
    }
});