/**
 * Yii validation module.
 *
 * This JavaScript module provides the validation methods for the built-in validators.
 *
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */

yii.validation = (function ($) {
    var pub = {
        isEmpty: function (value) {
            return value === null || value === undefined || ($.isArray(value) && value.length === 0) || value === '';
        },

        addMessage: function (messages, message, value) {
            messages.push(message.replace(/\{value\}/g, value));
        },

        required: function (value, messages, options) {
            var valid = false;
            if (options.requiredValue === undefined) {
                var isString = typeof value == 'string' || value instanceof String;
                if (options.strict && value !== undefined || !options.strict && !pub.isEmpty(isString ? $.trim(value) : value)) {
                    valid = true;
                }
            } else if (!options.strict && value == options.requiredValue || options.strict && value === options.requiredValue) {
                valid = true;
            }

            if (!valid) {
                pub.addMessage(messages, options.message, value);
            }
        },

        // "boolean" is a reserved keyword in older versions of ES so it's quoted for IE < 9 support
        'boolean': function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }
            var valid = !options.strict && (value == options.trueValue || value == options.falseValue)
                || options.strict && (value === options.trueValue || value === options.falseValue);

            if (!valid) {
                pub.addMessage(messages, options.message, value);
            }
        },

        string: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            if (typeof value !== 'string') {
                pub.addMessage(messages, options.message, value);
                return;
            }

            if (options.is !== undefined && value.length != options.is) {
                pub.addMessage(messages, options.notEqual, value);
                return;
            }
            if (options.min !== undefined && value.length < options.min) {
                pub.addMessage(messages, options.tooShort, value);
            }
            if (options.max !== undefined && value.length > options.max) {
                pub.addMessage(messages, options.tooLong, value);
            }
        },

        file: function (attribute, messages, options) {
            var files = getUploadedFiles(attribute, messages, options);
            $.each(files, function (i, file) {
                validateFile(file, messages, options);
            });
        },

        image: function (attribute, messages, options, deferredList) {
            var files = getUploadedFiles(attribute, messages, options);
            $.each(files, function (i, file) {
                validateFile(file, messages, options);

                // Skip image validation if FileReader API is not available
                if (typeof FileReader === "undefined") {
                    return;
                }

                var deferred = $.Deferred();
                pub.validateImage(file, messages, options, deferred, new FileReader(), new Image());
                deferredList.push(deferred);
            });
        },

        validateImage: function (file, messages, options, deferred, fileReader, image) {
            image.onload = function() {
                validateImageSize(file, image, messages, options);
                deferred.resolve();
            };

            image.onerror = function () {
                messages.push(options.notImage.replace(/\{file\}/g, file.name));
                deferred.resolve();
            };

            fileReader.onload = function () {
                image.src = this.result;
            };

            // Resolve deferred if there was error while reading data
            fileReader.onerror = function () {
                deferred.resolve();
            };

            fileReader.readAsDataURL(file);
        },

        number: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            if (typeof value === 'string' && !options.pattern.test(value)) {
                pub.addMessage(messages, options.message, value);
                return;
            }

            if (options.min !== undefined && value < options.min) {
                pub.addMessage(messages, options.tooSmall, value);
            }
            if (options.max !== undefined && value > options.max) {
                pub.addMessage(messages, options.tooBig, value);
            }
        },

        range: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            if (!options.allowArray && $.isArray(value)) {
                pub.addMessage(messages, options.message, value);
                return;
            }

            var inArray = true;

            $.each($.isArray(value) ? value : [value], function (i, v) {
                if ($.inArray(v, options.range) == -1) {
                    inArray = false;
                    return false;
                } else {
                    return true;
                }
            });

            if (options.not === undefined) {
                options.not = false;
            }

            if (options.not === inArray) {
                pub.addMessage(messages, options.message, value);
            }
        },

        regularExpression: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            if (!options.not && !options.pattern.test(value) || options.not && options.pattern.test(value)) {
                pub.addMessage(messages, options.message, value);
            }
        },

        email: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            var valid = true,
                regexp = /^((?:"?([^"]*)"?\s)?)(?:\s+)?(?:(<?)((.+)@([^>]+))(>?))$/,
                matches = regexp.exec(value);

            if (matches === null) {
                valid = false;
            } else {
                var localPart = matches[5],
                    domain = matches[6];

                if (options.enableIDN) {
                    localPart = punycode.toASCII(localPart);
                    domain = punycode.toASCII(domain);

                    value = matches[1] + matches[3] + localPart + '@' + domain + matches[7];
                }

                if (localPart.length > 64) {
                    valid = false;
                } else if ((localPart + '@' + domain).length > 254) {
                    valid = false;
                } else {
                    valid = options.pattern.test(value) || (options.allowName && options.fullPattern.test(value));
                }
            }

            if (!valid) {
                pub.addMessage(messages, options.message, value);
            }
        },

        url: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            if (options.defaultScheme && !/:\/\//.test(value)) {
                value = options.defaultScheme + '://' + value;
            }

            var valid = true;

            if (options.enableIDN) {
                var matches = /^([^:]+):\/\/([^\/]+)(.*)$/.exec(value);
                if (matches === null) {
                    valid = false;
                } else {
                    value = matches[1] + '://' + punycode.toASCII(matches[2]) + matches[3];
                }
            }

            if (!valid || !options.pattern.test(value)) {
                pub.addMessage(messages, options.message, value);
            }
        },

        trim: function ($form, attribute, options, value) {
            var $input = $form.find(attribute.input);
            if ($input.is(':checkbox, :radio')) {
                return value;
            }

            value = $input.val();
            if (!options.skipOnEmpty || !pub.isEmpty(value)) {
                value = $.trim(value);
                $input.val(value);
            }

            return value;
        },

        captcha: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            // CAPTCHA may be updated via AJAX and the updated hash is stored in body data
            var hash = $('body').data(options.hashKey);
            hash = hash == null ? options.hash : hash[options.caseSensitive ? 0 : 1];
            var v = options.caseSensitive ? value : value.toLowerCase();
            for (var i = v.length - 1, h = 0; i >= 0; --i) {
                h += v.charCodeAt(i);
            }
            if (h != hash) {
                pub.addMessage(messages, options.message, value);
            }
        },

        compare: function (value, messages, options, $form) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            var compareValue,
                valid = true;
            if (options.compareAttribute === undefined) {
                compareValue = options.compareValue;
            } else {
                var $target = $('#' + options.compareAttribute);
                if (!$target.length) {
                    $target = $form.find('[name="' + options.compareAttributeName + '"]');
                }
                compareValue = $target.val();
            }

            if (options.type === 'number') {
                value = value ? parseFloat(value) : 0;
                compareValue = compareValue ? parseFloat(compareValue) : 0;
            }
            switch (options.operator) {
                case '==':
                    valid = value == compareValue;
                    break;
                case '===':
                    valid = value === compareValue;
                    break;
                case '!=':
                    valid = value != compareValue;
                    break;
                case '!==':
                    valid = value !== compareValue;
                    break;
                case '>':
                    valid = value > compareValue;
                    break;
                case '>=':
                    valid = value >= compareValue;
                    break;
                case '<':
                    valid = value < compareValue;
                    break;
                case '<=':
                    valid = value <= compareValue;
                    break;
                default:
                    valid = false;
                    break;
            }

            if (!valid) {
                pub.addMessage(messages, options.message, value);
            }
        },

        ip: function (value, messages, options) {
            if (options.skipOnEmpty && pub.isEmpty(value)) {
                return;
            }

            var negation = null,
                cidr = null,
                matches = new RegExp(options.ipParsePattern).exec(value);
            if (matches) {
                negation = matches[1] || null;
                value = matches[2];
                cidr = matches[4] || null;
            }

            if (options.subnet === true && cidr === null) {
                pub.addMessage(messages, options.messages.noSubnet, value);
                return;
            }
            if (options.subnet === false && cidr !== null) {
                pub.addMessage(messages, options.messages.hasSubnet, value);
                return;
            }
            if (options.negation === false && negation !== null) {
                pub.addMessage(messages, options.messages.message, value);
                return;
            }

            var ipVersion = value.indexOf(':') === -1 ? 4 : 6;
            if (ipVersion == 6) {
                if (!(new RegExp(options.ipv6Pattern)).test(value)) {
                    pub.addMessage(messages, options.messages.message, value);
                }
                if (!options.ipv6) {
                    pub.addMessage(messages, options.messages.ipv6NotAllowed, value);
                }
            } else {
                if (!(new RegExp(options.ipv4Pattern)).test(value)) {
                    pub.addMessage(messages, options.messages.message, value);
                }
                if (!options.ipv4) {
                    pub.addMessage(messages, options.messages.ipv4NotAllowed, value);
                }
            }
        }
    };

    function getUploadedFiles(attribute, messages, options) {
        // Skip validation if File API is not available
        if (typeof File === "undefined") {
            return [];
        }

        var fileInput = $(attribute.input, attribute.$form).get(0);

        // Skip validation if file input does not exist
        // (in case file inputs are added dynamically and no file input has been added to the form)
        if (typeof fileInput === "undefined") {
            return [];
        }

        var files = fileInput.files;
        if (!files) {
            messages.push(options.message);
            return [];
        }

        if (files.length === 0) {
            if (!options.skipOnEmpty) {
                messages.push(options.uploadRequired);
            }

            return [];
        }

        if (options.maxFiles && options.maxFiles < files.length) {
            messages.push(options.tooMany);
            return [];
        }

        return files;
    }

    function validateFile(file, messages, options) {
        if (options.extensions && options.extensions.length > 0) {
            var found = false;
            var filename = file.name.toLowerCase();

            for (var index=0; index < options.extensions.length; index++) {
                var ext = options.extensions[index].toLowerCase();
                if ((ext === '' && filename.indexOf('.') === -1) || (filename.substr(filename.length - options.extensions[index].length - 1) === ('.' + ext))) {
                    found = true;
                    break;
                }
            }

            if (!found) {
                messages.push(options.wrongExtension.replace(/\{file\}/g, file.name));
            }
        }

        if (options.mimeTypes && options.mimeTypes.length > 0) {
            if (!validateMimeType(options.mimeTypes, file.type)) {
                messages.push(options.wrongMimeType.replace(/\{file\}/g, file.name));
            }
        }

        if (options.maxSize && options.maxSize < file.size) {
            messages.push(options.tooBig.replace(/\{file\}/g, file.name));
        }

        if (options.minSize && options.minSize > file.size) {
            messages.push(options.tooSmall.replace(/\{file\}/g, file.name));
        }
    }

    function validateMimeType(mimeTypes, fileType) {
        for (var i = 0, len = mimeTypes.length; i < len; i++) {
            if (new RegExp(mimeTypes[i]).test(fileType)) {
                return true;
            }
        }

        return false;
    }

    function validateImageSize(file, image, messages, options) {
        if (options.minWidth && image.width < options.minWidth) {
            messages.push(options.underWidth.replace(/\{file\}/g, file.name));
        }

        if (options.maxWidth && image.width > options.maxWidth) {
            messages.push(options.overWidth.replace(/\{file\}/g, file.name));
        }

        if (options.minHeight && image.height < options.minHeight) {
            messages.push(options.underHeight.replace(/\{file\}/g, file.name));
        }

        if (options.maxHeight && image.height > options.maxHeight) {
            messages.push(options.overHeight.replace(/\{file\}/g, file.name));
        }
    }

    return pub;
})(jQuery);