/*
    name : backTweet
    file : jquery.backTweet.js
    author : gregory tomlinson
    Dual licensed under the MIT and GPL licenses.
    ///////////////////////////
    ///////////////////////////
    dependencies : jQuery 1.4.2, jquery.commifyNumber.js
    ///////////////////////////
    ///////////////////////////

*/

(function($) {
    
    $.fn.backTweet = function( sourceUrl, hash, displayNumber, options ) {
        // extend the defaults settings
        var el = this, o = $.extend(true, {}, defaults, options),
            counter = 0, tweets, bx=null, timer = null, h = hash, displayNumber=displayNumber || 3;
        bx = el.find('.tweetsBox');
        o.params.q = sourceUrl;
        connector(o.url, o.params, success);
        return this;
        
        function success(jo) {
           tweets = jo.tweets;
           if(tweets && tweets.length > 0 ) {
               
               createHeader(  jo.totalresults );
               createTweet();
               createAttribution();
            }
        }
        
        function createTweet() {
            var d = _createTweet();
            d.fadeIn('normal', tweetComplete).appendTo(bx);
        }
        function _createTweet() {
            // replace the links with bit.ly hash.. WARNING. This will replace links that aren't the correct match
            var tweet =  tweets[counter].tweet_text,
                linkStartExp = new RegExp('<a[^>]+>', 'gi'), linkEndExp = new RegExp('<\/a>', 'gi');

            // strip links, escape, then add links back in to protect against XSS
            tweet = tweet.replace(linkStartExp, '').replace(linkEndExp, '');
            tweet = $.escapeHTML(tweet);
            tweet = $.linkify(tweet);
             // .replace(/<[^>]+>(http.{8,}?)<\/[^>]+>/gmi, '<a href="http://bit.ly/'+ h +'">bit.ly/'+h+'</a>');
            return $('<div />').addClass('singleBackTweetBox').html( "@<a href='http://twitter.com/"+ tweets[counter].tweet_from_user +"'>" +tweets[counter].tweet_from_user + "</a>: " + tweet );
        }
        
        function removeTweet() {
            bx.find(':first').slideUp('fast', addTweet);
        }
        
        function addTweet() {
            bx.find(':first').remove();
            _createTweet().fadeIn('normal').appendTo(bx)
        }
        
        function tweetComplete() {
            counter +=1;
            console.log(displayNumber, "displayNumber")
            if(counter < tweets.length && counter < displayNumber ) {
                createTweet();
            } else if(tweets.length > counter) {
                timer = setInterval( timerAddTweet, 10000 )
            }
        }
        
        function timerAddTweet() {
            counter +=1;
            if(counter < tweets.length) {
                // TODO: remove one
                removeTweet();
            } else {
                clearInterval(timer);
            }
        }
        
        function createHeader( results  ) {
            var img = '<img class="backTypeIcon" src="/s/graphics/backtype_sm.png" width="16" height="16" alt="back type" border="0" />',
                verbage = results==1 ? 'Tweet' : 'Tweets', d = $('<span />').addClass('tweetsCounterHeadline').html( '<a href="http://www.backtype.com/">' + img + ($.commifyNumber(results)) + " " + verbage + '</a>')
            d.prependTo(el);
        }
        
        function createAttribution() {
            $('<div />').addClass('tweetAttributionPartner').html('<a href="http://backtype.com">Tweet Stream via BackType</a>').fadeIn('fast').appendTo(el);
        }
    
    }
    
    
    var defaults = {
        tweetDisplayNumber : 3,
        url : 'http://backtweets.com/search.json',
        params : {
            itemsperpage : 60,
            key : '1029305fc11efb95c3a4',
            q : ''
        }
    
    };

    
    
    function connector(url, params, callback) {
        var str = $.param( params );
        $.ajax({
            dataType: 'jsonp',
            data : str,
            jsonp: 'callback',
            'url' : url,
            success: callback
        });
    }

})(jQuery);