/**
 * Twitter class for jQuery, for extended functionality
 * Depends on jquery.twitter.js for core functions
 * 
 * @author 			khaehlen <khaehlen@zigwebsoftware.nl>
 * @version 		1.0
 * @copyright		Copyright (c) 2011, Zig Websoftware
 * @dependencies	jquery.twitter.js
 * 
 * Common usage:
 * Twitter.init('MyTwitterAccount');
 * 
 * or for example:
 * 
 * Twitter.init({ 'username': 'MyUsername' });
 */


var Twitter = {
	oTwitterNode: null,
	iCurrent: null,
	oConfig: {
					numTweets	: 4,
					username	: '',
					query		: '',
					requestType	: 'profile'			// can be 'profile' of 'search'
	},
	'init':	function(oConfig)
	{
		// if config is given, override default config
		if (typeof oConfig == 'object')
		{
			for (var i in oConfig)
			{
				Twitter.oConfig[i] = oConfig[i];
			}
		}
		
		Twitter.oTwitterNode = jQuery('#twitter');
		if (Twitter.oTwitterNode.length > 0) {
			
			Twitter.renderObject();
		}
	},
	'afterRender': function(oContainer)
	{
		var oContainer = jQuery(Twitter.oTwitterNode[0]);
		var oFirstItem = oContainer.find('.twtr-tweet:first').get(0);
		if (typeof oFirstItem != 'undefined')
		{
			var oFirstItemId = oFirstItem.id;
			iCurrent = oFirstItemId.replace('tweet-id-', '');
			Twitter.iCurrent = iCurrent;
			// Firefox: make sure the top twitter is initially the visible one
			Twitter.oTwitterNode.find('.twtr-tweets').scrollTo(jQuery('#tweet-id-'+Twitter.iCurrent), 1);
		}
		else
		{
			Twitter.iCurrent = Twitter.oConfig.numTweets;
		}
		
		Twitter.addNavigation(oContainer);	
	},
	'addNavigation': function(oContainer)
	{
		oContainer.append('<div class="twitter-navigation"><div id="twitter-up"><!-- EMPTY --></div><div id="twitter-down"><!-- EMPTY --></div></div>');
		Twitter.startListeners(oContainer);
	},
	'startListeners': function(oContainer)
	{
		oContainer.find('#twitter-up').click(function(oEvent)
		{
			if (jQuery('#tweet-id-' + (Twitter.iCurrent+1)).length > 0)
			{
				Twitter.iCurrent++;
				Twitter.oTwitterNode.find('.twtr-tweets').scrollTo(jQuery('#tweet-id-'+Twitter.iCurrent), 800);
			}
		});
		
		oContainer.find('#twitter-down').click(function(oEvent)
		{
			if (jQuery('#tweet-id-' + (Twitter.iCurrent-1)).length > 0)
			{
				Twitter.iCurrent--;
				Twitter.oTwitterNode.find('.twtr-tweets').scrollTo(jQuery('#tweet-id-'+Twitter.iCurrent), 800);
			}
		});
	},
	'renderObject': function()
	{
			// KHa: prevent loading a stylesheet
			TWTR.Widget.hasLoadedStyleSheet = true;
			
			var oWidget = new TWTR.Widget({
			  version: 2,	
				type: Twitter.oConfig.requestType,
				search: Twitter.oConfig.query,
				rpp: Twitter.oConfig.numTweets,
				interval: 30000,
				id: 'twitter',
				width: 'auto',
				height: 300,
				creator: true,		// KHa: makes sure the !important in the inline-style is omitted
				features: {
					scrollbar: false,
					loop: false,
					live: false,
					behavior: 'all'
				},
				theme: {
					shell: {
						background: 'transparent',
						color: 'inherit'
					},
					tweets: {
						background: 'transparent',
						color: 'inherit',
						fontSize: 'inherit'
					}
				}
			}).render();
			
			if (Twitter.oConfig.requestType == 'profile')
			{
				oWidget.setUser(Twitter.oConfig.username);
			}
			
			oWidget.start();
			
			// register callback
			Twitter.loadCount = 50;
			Twitter.waitForLoad(oWidget);
			
	},
	'loadCount': null,
	'waitForLoad': function(oWidget)
	{
		if (oWidget.results.length > 0 || --Twitter.loadCount <= 0)
		{
			Twitter.afterRender();
			return;
		}
		
		setTimeout(function(){
			Twitter.waitForLoad(oWidget);
		},50);
	}
	
};

/* Advanced scrolling, see: http://jsfiddle.net/ztFWv/3/ */

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