/*!
 * Copyright (c) 2014 Chris O'Hara <cohara87@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

(function (name, definition) {
    if (typeof exports !== 'undefined' && typeof module !== 'undefined') {
        module.exports = definition();
    } else if (typeof define === 'function' && typeof define.amd === 'object') {
        define(definition);
    } else {
        this[name] = definition();
    }
})('validator', function (validator) {

    'use strict';

    validator = { version: '3.22.2' };

    var email = /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i;

    var creditCard = /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$/;

    var isbn10Maybe = /^(?:[0-9]{9}X|[0-9]{10})$/
      , isbn13Maybe = /^(?:[0-9]{13})$/;

    var ipv4Maybe = /^(\d?\d?\d)\.(\d?\d?\d)\.(\d?\d?\d)\.(\d?\d?\d)$/
      , ipv6 = /^::|^::1|^([a-fA-F0-9]{1,4}::?){1,7}([a-fA-F0-9]{1,4})$/;

    var uuid = {
        '3': /^[0-9A-F]{8}-[0-9A-F]{4}-3[0-9A-F]{3}-[0-9A-F]{4}-[0-9A-F]{12}$/i
      , '4': /^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
      , '5': /^[0-9A-F]{8}-[0-9A-F]{4}-5[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i
      , all: /^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$/i
    };

    var alpha = /^[a-zA-Z]+$/
      , alphanumeric = /^[a-zA-Z0-9]+$/
      , numeric = /^-?[0-9]+$/
      , int = /^(?:-?(?:0|[1-9][0-9]*))$/
      , float = /^(?:-?(?:[0-9]+))?(?:\.[0-9]*)?(?:[eE][\+\-]?(?:[0-9]+))?$/
      , hexadecimal = /^[0-9a-fA-F]+$/
      , hexcolor = /^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/;

    var ascii = /^[\x00-\x7F]+$/
      , multibyte = /[^\x00-\x7F]/
      , fullWidth = /[^\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/
      , halfWidth = /[\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/;

    var surrogatePair = /[\uD800-\uDBFF][\uDC00-\uDFFF]/;

    var base64 = /^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{4})$/;

    validator.extend = function (name, fn) {
        validator[name] = function () {
            var args = Array.prototype.slice.call(arguments);
            args[0] = validator.toString(args[0]);
            return fn.apply(validator, args);
        };
    };

    //Right before exporting the validator object, pass each of the builtins
    //through extend() so that their first argument is coerced to a string
    validator.init = function () {
        for (var name in validator) {
            if (typeof validator[name] !== 'function' || name === 'toString' ||
                    name === 'toDate' || name === 'extend' || name === 'init') {
                continue;
            }
            validator.extend(name, validator[name]);
        }
    };

    validator.toString = function (input) {
        if (typeof input === 'object' && input !== null && input.toString) {
            input = input.toString();
        } else if (input === null || typeof input === 'undefined' || (isNaN(input) && !input.length)) {
            input = '';
        } else if (typeof input !== 'string') {
            input += '';
        }
        return input;
    };

    validator.toDate = function (date) {
        if (Object.prototype.toString.call(date) === '[object Date]') {
            return date;
        }
        date = Date.parse(date);
        return !isNaN(date) ? new Date(date) : null;
    };

    validator.toFloat = function (str) {
        return parseFloat(str);
    };

    validator.toInt = function (str, radix) {
        return parseInt(str, radix || 10);
    };

    validator.toBoolean = function (str, strict) {
        if (strict) {
            return str === '1' || str === 'true';
        }
        return str !== '0' && str !== 'false' && str !== '';
    };

    validator.equals = function (str, comparison) {
        return str === validator.toString(comparison);
    };

    validator.contains = function (str, elem) {
        return str.indexOf(validator.toString(elem)) >= 0;
    };

    validator.matches = function (str, pattern, modifiers) {
        if (Object.prototype.toString.call(pattern) !== '[object RegExp]') {
            pattern = new RegExp(pattern, modifiers);
        }
        return pattern.test(str);
    };

    validator.isEmail = function (str) {
        return email.test(str);
    };

    var default_url_options = {
        protocols: [ 'http', 'https', 'ftp' ]
      , require_tld: true
      , require_protocol: false
      , allow_underscores: false
    };

    validator.isURL = function (url, options) {
        if (!url || url.length >= 2083) {
            return false;
        }
        if (url.indexOf('mailto:') === 0) {
            return false;
        }
        options = merge(options, default_url_options);
        var protocol, user, pass, auth, host, hostname, port,
            port_str, path, query, hash, split;
        split = url.split('://');
        if (split.length > 1) {
            protocol = split.shift();
            if (options.protocols.indexOf(protocol) === -1) {
                return false;
            }
        } else if (options.require_protocol) {
            return false;
        }
        url = split.join('://');
        split = url.split('#');
        url = split.shift();
        hash = split.join('#');
        if (hash && /\s/.test(hash)) {
            return false;
        }
        split = url.split('?');
        url = split.shift();
        query = split.join('?');
        if (query && /\s/.test(query)) {
            return false;
        }
        split = url.split('/');
        url = split.shift();
        path = split.join('/');
        if (path && /\s/.test(path)) {
            return false;
        }
        split = url.split('@');
        if (split.length > 1) {
            auth = split.shift();
            if (auth.indexOf(':') >= 0) {
                auth = auth.split(':');
                user = auth.shift();
                if (!/^\S+$/.test(user)) {
                    return false;
                }
                pass = auth.join(':');
                if (!/^\S*$/.test(user)) {
                    return false;
                }
            }
        }
        hostname = split.join('@');
        split = hostname.split(':');
        host = split.shift();
        if (split.length) {
            port_str = split.join(':');
            port = parseInt(port_str, 10);
            if (!/^[0-9]+$/.test(port_str) || port <= 0 || port > 65535) {
                return false;
            }
        }
        if (!validator.isIP(host) && !validator.isFQDN(host, options) &&
                host !== 'localhost') {
            return false;
        }
        if (options.host_whitelist &&
                options.host_whitelist.indexOf(host) === -1) {
            return false;
        }
        if (options.host_blacklist &&
                options.host_blacklist.indexOf(host) !== -1) {
            return false;
        }
        return true;
    };

    validator.isIP = function (str, version) {
        version = validator.toString(version);
        if (!version) {
            return validator.isIP(str, 4) || validator.isIP(str, 6);
        } else if (version === '4') {
            if (!ipv4Maybe.test(str)) {
                return false;
            }
            var parts = str.split('.').sort(function (a, b) {
                return a - b;
            });
            return parts[3] <= 255;
        }
        return version === '6' && ipv6.test(str);
    };

    var default_fqdn_options = {
        require_tld: true
      , allow_underscores: false
    };

    validator.isFQDN = function (str, options) {
        options = merge(options, default_fqdn_options);
        var parts = str.split('.');
        if (options.require_tld) {
            var tld = parts.pop();
            if (!parts.length || !/^[a-z]{2,}$/i.test(tld)) {
                return false;
            }
        }
        for (var part, i = 0; i < parts.length; i++) {
            part = parts[i];
            if (options.allow_underscores) {
                if (part.indexOf('__') >= 0) {
                    return false;
                }
                part = part.replace(/_/g, '');
            }
            if (!/^[a-z\u00a1-\uffff0-9-]+$/i.test(part)) {
                return false;
            }
            if (part[0] === '-' || part[part.length - 1] === '-' ||
                    part.indexOf('---') >= 0) {
                return false;
            }
        }
        return true;
    };

    validator.isAlpha = function (str) {
        return alpha.test(str);
    };

    validator.isAlphanumeric = function (str) {
        return alphanumeric.test(str);
    };

    validator.isNumeric = function (str) {
        return numeric.test(str);
    };

    validator.isHexadecimal = function (str) {
        return hexadecimal.test(str);
    };

    validator.isHexColor = function (str) {
        return hexcolor.test(str);
    };

    validator.isLowercase = function (str) {
        return str === str.toLowerCase();
    };

    validator.isUppercase = function (str) {
        return str === str.toUpperCase();
    };

    validator.isInt = function (str) {
        return int.test(str);
    };

    validator.isFloat = function (str) {
        return str !== '' && float.test(str);
    };

    validator.isDivisibleBy = function (str, num) {
        return validator.toFloat(str) % validator.toInt(num) === 0;
    };

    validator.isNull = function (str) {
        return str.length === 0;
    };

    validator.isLength = function (str, min, max) {
        var surrogatePairs = str.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g) || [];
        var len = str.length - surrogatePairs.length;
        return len >= min && (typeof max === 'undefined' || len <= max);
    };

    validator.isByteLength = function (str, min, max) {
        return str.length >= min && (typeof max === 'undefined' || str.length <= max);
    };

    validator.isUUID = function (str, version) {
        var pattern = uuid[version ? version : 'all'];
        return pattern && pattern.test(str);
    };

    validator.isDate = function (str) {
        return !isNaN(Date.parse(str));
    };

    validator.isAfter = function (str, date) {
        var comparison = validator.toDate(date || new Date())
          , original = validator.toDate(str);
        return !!(original && comparison && original > comparison);
    };

    validator.isBefore = function (str, date) {
        var comparison = validator.toDate(date || new Date())
          , original = validator.toDate(str);
        return original && comparison && original < comparison;
    };

    validator.isIn = function (str, options) {
        if (!options || typeof options.indexOf !== 'function') {
            return false;
        }
        if (Object.prototype.toString.call(options) === '[object Array]') {
            var array = [];
            for (var i = 0, len = options.length; i < len; i++) {
                array[i] = validator.toString(options[i]);
            }
            options = array;
        }
        return options.indexOf(str) >= 0;
    };

    validator.isCreditCard = function (str) {
        var sanitized = str.replace(/[^0-9]+/g, '');
        if (!creditCard.test(sanitized)) {
            return false;
        }
        var sum = 0, digit, tmpNum, shouldDouble;
        for (var i = sanitized.length - 1; i >= 0; i--) {
            digit = sanitized.substring(i, (i + 1));
            tmpNum = parseInt(digit, 10);
            if (shouldDouble) {
                tmpNum *= 2;
                if (tmpNum >= 10) {
                    sum += ((tmpNum % 10) + 1);
                } else {
                    sum += tmpNum;
                }
            } else {
                sum += tmpNum;
            }
            shouldDouble = !shouldDouble;
        }
        return !!((sum % 10) === 0 ? sanitized : false);
    };

    validator.isISBN = function (str, version) {
        version = validator.toString(version);
        if (!version) {
            return validator.isISBN(str, 10) || validator.isISBN(str, 13);
        }
        var sanitized = str.replace(/[\s-]+/g, '')
          , checksum = 0, i;
        if (version === '10') {
            if (!isbn10Maybe.test(sanitized)) {
                return false;
            }
            for (i = 0; i < 9; i++) {
                checksum += (i + 1) * sanitized.charAt(i);
            }
            if (sanitized.charAt(9) === 'X') {
                checksum += 10 * 10;
            } else {
                checksum += 10 * sanitized.charAt(9);
            }
            if ((checksum % 11) === 0) {
                return !!sanitized;
            }
        } else  if (version === '13') {
            if (!isbn13Maybe.test(sanitized)) {
                return false;
            }
            var factor = [ 1, 3 ];
            for (i = 0; i < 12; i++) {
                checksum += factor[i % 2] * sanitized.charAt(i);
            }
            if (sanitized.charAt(12) - ((10 - (checksum % 10)) % 10) === 0) {
                return !!sanitized;
            }
        }
        return false;
    };

    validator.isJSON = function (str) {
        try {
            JSON.parse(str);
        } catch (e) {
            return false;
        }
        return true;
    };

    validator.isMultibyte = function (str) {
        return multibyte.test(str);
    };

    validator.isAscii = function (str) {
        return ascii.test(str);
    };

    validator.isFullWidth = function (str) {
        return fullWidth.test(str);
    };

    validator.isHalfWidth = function (str) {
        return halfWidth.test(str);
    };

    validator.isVariableWidth = function (str) {
        return fullWidth.test(str) && halfWidth.test(str);
    };

    validator.isSurrogatePair = function (str) {
        return surrogatePair.test(str);
    };

    validator.isBase64 = function (str) {
        return base64.test(str);
    };

    validator.isMongoId = function (str) {
        return validator.isHexadecimal(str) && str.length === 24;
    };

    validator.ltrim = function (str, chars) {
        var pattern = chars ? new RegExp('^[' + chars + ']+', 'g') : /^\s+/g;
        return str.replace(pattern, '');
    };

    validator.rtrim = function (str, chars) {
        var pattern = chars ? new RegExp('[' + chars + ']+$', 'g') : /\s+$/g;
        return str.replace(pattern, '');
    };

    validator.trim = function (str, chars) {
        var pattern = chars ? new RegExp('^[' + chars + ']+|[' + chars + ']+$', 'g') : /^\s+|\s+$/g;
        return str.replace(pattern, '');
    };

    validator.escape = function (str) {
        return (str.replace(/&/g, '&amp;')
            .replace(/"/g, '&quot;')
            .replace(/'/g, '&#x27;')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;'));
    };

    validator.stripLow = function (str, keep_new_lines) {
        var chars = keep_new_lines ? '\x00-\x09\x0B\x0C\x0E-\x1F\x7F' : '\x00-\x1F\x7F';
        return validator.blacklist(str, chars);
    };

    validator.whitelist = function (str, chars) {
        return str.replace(new RegExp('[^' + chars + ']+', 'g'), '');
    };

    validator.blacklist = function (str, chars) {
        return str.replace(new RegExp('[' + chars + ']+', 'g'), '');
    };

    var default_normalize_email_options = {
        lowercase: true
    };

    validator.normalizeEmail = function (email, options) {
        options = merge(options, default_normalize_email_options);
        if (!validator.isEmail(email)) {
            return false;
        }
        var parts = email.split('@', 2);
        parts[1] = parts[1].toLowerCase();
        if (options.lowercase) {
            parts[0] = parts[0].toLowerCase();
        }
        if (parts[1] === 'gmail.com' || parts[1] === 'googlemail.com') {
            if (!options.lowercase) {
                parts[0] = parts[0].toLowerCase();
            }
            parts[0] = parts[0].replace(/\./g, '').split('+')[0];
            parts[1] = 'gmail.com';
        }
        return parts.join('@');
    };

    function merge(obj, defaults) {
        obj = obj || {};
        for (var key in defaults) {
            if (typeof obj[key] === 'undefined') {
                obj[key] = defaults[key];
            }
        }
        return obj;
    }

    validator.init();

    return validator;

});
