;(function($, window, document, undefined){
    'use strict';
    var pluginName = 'Message',
        defaults = {
            default_classes: 'alert'
        };

    $.fn.message = function(option) {
        return this.each(function () {
            var $this = $(this);
            var messages = $this.data('jq.messages');
            var options = typeof option === 'object' && option;

            if (!messages) { messages = []; }
            if (options) {
                messages.push(new Message($this, options));
                $this.data('jq.messages', messages);
            }
            if (typeof option === 'string') {
                $.each(messages, function(key, val){
                    val[option]();
                });
            }
        });
    };

    function Message(element, options) {
        this.element = element;
        this.options = options;
        var default_classes = defaults.default_classes.split(' ');

        if(this.options.hasOwnProperty('classes')) {
            this.options.classes = this.options.classes.split(' ');
            this.options.classes = this.options.classes.concat(
                default_classes);
        } else {
            this.options.classes = default_classes;
        }

        this._defaults = defaults;
        this._name = pluginName;

        if (this.options.clean === true || this.options.clean === false) {
            this.clean = this.options.clean;
        }
        else { this.clean = true; }

        if (this.options.slideIn === true || this.options.slideIn === false) {
            this.slideIn = this.options.slideIn;
        }
        else { this.slideIn = false; }

        if(this.buildMessage()) {
            this.cleanMessage();
            this.insertMessage();
        }

        return this;
    }

    Message.prototype.close = function() {
        $(this._message_).remove();
    };

    Message.prototype.buildMessage = function(){
        var element_attribute = $(this.element).data(
            this.options.message_attribute);
        var body_attribute = $(document.body).data(
            this.options.message_attribute);
        var fallback_attribute = $(document.body).data(
            this.options.fallback_message_attribute);

        if (this.options.message_attribute && element_attribute) {
            this.message_details = element_attribute;
        }
        else if (this.options.message) {
            this.message_details = this.options.message;
        }
        else if (this.options.message_attribute && body_attribute) {
            this.message_details = body_attribute;
        }
        else if (this.options.fallback_message_attribute &&
            fallback_attribute) {
            this.message_details = fallback_attribute;
        }
        else {
            this.message_details = { message: this.options.default_message };
        }

        if (this.message_details.constructor === String) {
            this.message_details = { message: this.message_details };
        }

        return this.message_details.message !== undefined;
    };

    Message.prototype.cleanMessage = function(){
        if (this.clean) {
            var this_element = this.element;
            $.each(this.options.classes, function(key, value) {
                if(this.slideIn) {
                    $(this_element).find('.' + value).slideUp(200, function() {
                        $(this).remove();
                    });
                } else {
                    $(this_element).find('.' + value).remove();
                }
            });
        }
    };

    Message.prototype.printableClasses = function() {
        return this.options.classes.join(' ');
    };

    Message.prototype.insertMessage = function(){
        var message_class = this.printableClasses();

        var message = $('<div>').attr('class', 'alert ' + message_class);
        if (this.message_details.hasOwnProperty('message')) {
            message.html(this.message_details.message);
        } else {
            message.html(this.message_details);
        }

        this._message_ = message;

        var element = null;
        if(this.message_details.field_name){
            var element_selector = ('[name="' +
                this.message_details.field_name + '"]');
            element = $(this.element).find(element_selector);
            message.attr('class', 'fieldError alert ' + message_class).hide();
            element.parent().append(message);

            if(this.slideIn) { message.slideDown(200); }
            else { message.show(); }

            return;
        }

        if (this.options.attach_to) {
            element = $(this.element).find(this.options.attach_to);
            message.attr('class', 'fieldError ' + message_class).hide();
            element.after(message);

            if(this.slideIn) { message.slideDown(200); }
            else { message.show(); }

            return;
        }

        $(this.element).prepend(message.hide());

        if(this.slideIn) { message.slideDown(200); }
        else { message.show(); }
    };
})(jQuery, window, document);