/*
* jQuery Simply Countable plugin
* Provides a character counter for any text input or textarea
* 
* @version  0.2
* @homepage http://github.com/aaronrussell/jquery-simply-countable/
* @author   Aaron Russell (http://www.aaronrussell.co.uk)
*
* Copyright (c) 2009 Aaron Russell (aaron@gc4.co.uk)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
*/

(function($) {

    $.fn.simplyCountable = function(options) {

        options = $.extend({
            counter: '#counter',
            countType: 'characters',
            maxCount: 140,
            countDirection: 'down',
            safeClass: 'safe',
            overClass: 'over'
        }, options);

        var countable = this;

        var countCheck = function() {

            if (options.countType === 'words') {
                var count = options.maxCount - countable.val().split(/[\s]+/).length;
                if (countable.val() === '') count += 1;
            }
            else var count = options.maxCount - countable.val().length;

            if (!$(options.counter).hasClass(options.safeClass) && !$(options.counter).hasClass(options.overClass)) {
                if (count < 0) $(options.counter).addClass(options.overClass);
                else $(options.counter).addClass(options.safeClass);
            }
            else if (count < 0 && $(options.counter).hasClass(options.safeClass)) {
                $(options.counter).removeClass(options.safeClass).addClass(options.overClass);
            }
            else if (count >= 0 && $(options.counter).hasClass(options.overClass)) {
                $(options.counter).removeClass(options.overClass).addClass(options.safeClass);
            }

            if (options.countDirection === 'up') {
                count = count - (count * 2) + options.maxCount;
            }

            $(options.counter).text(count);
        };
        countCheck();

        countable.keyup(countCheck);

    };

})(jQuery);