// This is a self invoking function. 
// The $ parameter allows you to reference the jQuery item.
(function ($) {

    // fn is essentially the same as prototype.
    // so this will be used like $('#jqueryItem).twitterize(username)
    $.fn.twitterize = function (username, options) {

        //check to see if the username has been set.
        if (username) {

            //create an object full of your default settings.
            var defaultSettings = {
                count: '1'
            }

            // Finds which default settings have been overwritten by the options object
            // and creates a new object with all the new and untouched settings.
            var settings = $.extend(defaultSettings, options);

            // The URL for the Twitter JSON API.
            var url = "http://twitter.com/status/user_timeline/" + username + ".json?count=" + settings.count + "&callback=?";

            //Variable to get around scope problem in callback function.
            var holder = this;

            $.getJSON(url,

            //This function is called when twitter responds with the appropriate information.
	    function (data) {
	       // console.log(data);
	        //Step through each tweet.
	        $.each(data, function (i, item) {

	            //place the tweet within a paragraph tag.
	            holder.append("<p><img src=/images/twitterIcon.png border=0 class=typeIcon align=absMiddle />" + item.text.makeLinks() + "</p>");

	        });
	    });

        } else {
            //Username paramater hasn't been set.
            console.debug("jquery plugin twitterize requires a username! Check your parameters");

        }


        //Changes urls within the tweet into links.
        String.prototype.makeLinks = function () {
            return this.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function (str) {
                return str.link(str);
            });
        };


        //Return itself
        return this;

    };

    // We pass "jQuery" to the self invoking function 
    // so we can use whatever alias of jQeury that we like. 
    // So instead of "$" you could also use any other 
    // valid JavaScript variable name.

})(jQuery);