(function($) {

	var methods = {

	    init : function(options) {

		    // console.debug('init');

		    var settings = {
		        limit : 3,
		        updatePath : '/helpers/updateSocialFeed.php',
		        twitterIcon : '/images/icon_sm-twitter.png',
		        facebookIcon : '/images/icon_sm-facebook.png',
		        bloggerIcon : '/images/icon_sm-blogger.png',
		        updateInterval : 30
		    };

		    if (options) {
			    $.extend(settings, options);
		    }

		    return this.each(function() {

			    var data = {
			        settings : settings,
			        refreshTimer : null,
			        items : [],
			        timer : null,
			        updateTimer : null,
			        since : 0,
			        firstLoad : true
			    };

			    // store data with the element
			    $(this).data('socialFeed', data);

			    $(this).socialFeed('getUpdate', data.settings.limit);

		    });
	    },

	    getUpdate : function(limit) {

		    // console.debug('getUpdate');

		    return this.each(function() {

			    var $this = $(this);
			    var data = $this.data('socialFeed');

			    $.ajax({
			        url : data.settings.updatePath,
			        data : {
			            limit : limit,
			            since : data.since
			        },
			        success : function(result) {
				        if (data.firstLoad) {
					        data.firstLoad = false;
					        $this.find('div').eq(0).remove();
					        for (i in result) {
						        $this.socialFeed('addItem', result[i], false);
					        }
				        } else {
					        for (i in result) {
						        $this.socialFeed('addItem', result[i], true);
					        }
				        }
			        },
			        dataType : 'json'
			    });

		    });
	    },

	    addItem : function(itemData, flip) {

		    // console.debug('addItem');

		    return this.each(function() {

			    var icon = null;
			    var item = null;
			    var controls = null;
			    var replyUrl = false;
			    var $this = $(this);
			    var data = $(this).data('socialFeed');

			    switch (itemData.type) {
			    case 'tweet':
				    icon = data.settings.twitterIcon;
				    replyUrl = 'http://twitter.com/intent/tweet?in_reply_to=' + itemData.id;
				    break;
			    case 'facebook':
				    icon = data.settings.facebookIcon;
				    replyUrl = false;
				    break;
			    case 'blogger':
				    icon = data.settings.bloggerIcon;
				    replyUrl = 'http://devonshow.blogspot.com';
				    break;
			    }

			    item = $('<div />', {
				    'class' : 'social-media-feed-item'
			    }).css({
			        'background-image' : "url('" + icon + "')",
			        'display' : 'none'
			    });

			    if (itemData.type == 'tweet') {

				    item.append($('<span />', {
				        'class' : 'feed-item-from',
				        html : '<a href="http://twitter.com/' + itemData.from + '">' + itemData.from + '<a/>&nbsp;'
				    }));

			    } else {

				    item.append($('<span />', {
				        'class' : 'feed-item-from',
				        html : '<strong>' + itemData.from + '</strong>&nbsp;'
				    }));

			    }

			    item.append($('<span />', {
			        'class' : 'feed-item-content',
			        html : itemData.html + '&nbsp;'
			    }));

			    controls = $('<div />', {
				    'class' : 'social-media-feed-item-controls'
			    });

			    controls.append($('<abbr />', {
			        'class' : 'feed-item-sent timeago',
			        title : itemData.sent_format1,
			        html : itemData.sent_format2
			    }));

			    if (replyUrl) {

				    controls.append($('<span />', {
					    'html' : '&nbsp;&middot;&nbsp;'
				    }));

				    controls.append($('<a />', {
				        'class' : 'feed-item-reply',
				        href : replyUrl,
				        html : 'reply',
				        rel : 'external',
				        target : '_blank'
				    }));

			    }

			    item.append(controls);

			    // add divider
			    item.append($('<hr />'));

			    data.items.push(item);

			    if (itemData.sent > data.since)
				    data.since = itemData.sent;

			    if (data.timer == null) {
				    data.timer = setInterval(function() {
					    $this.socialFeed('addItemToPage', flip);
				    }, 500);
			    }

		    });

	    },

	    addItemToPage : function(flip) {

		    // console.debug('addItemToPage');

		    return this.each(function() {

			    var $this = $(this);
			    var data = $this.data('socialFeed');

			    if (data.items.length > 0) {

				    // stop updating
				    clearInterval(data.updateTimer);

				    var item = null;
				    if (flip) {
					    item = data.items.pop();
					    if ($this.find('h3')) {
						    $this.find('h3').after(item);
					    } else {
						    $this.prepend(item);
					    }
				    } else {
					    item = data.items.shift();
					    $this.append(item);
				    }

				    if ($this.find('div.social-media-feed-item').length > data.limit) {
					    $this.find('div.social-media-feed-item:last').remove();
				    }

				    if (jQuery.timeago) {
					    // initiate timeago script
					    $("abbr.timeago").timeago();
				    }

				    item.fadeIn('fast');

			    } else {

				    clearInterval(data.timer);
				    data.timer = null;

				    // set up an interval for updating
				    data.updateTimer = setInterval(function() {
					    $this.socialFeed('getUpdate');
				    }, (data.settings.updateInterval * 1000));

			    }

			    // add last class
			    $this.find('div.social-media-feed-item').removeClass('last');
			    $this.find('div.social-media-feed-item').last().addClass('last');

		    });
	    }

	};

	$.fn.socialFeed = function(method) {

		if (methods[method]) {
			return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
		} else if (typeof method === 'object' || !method) {
			return methods.init.apply(this, arguments);
		} else {
			$.error('Method ' + method + ' does not exist on jQuery.socialFeed');
		}

	};

})(jQuery);