/*!

 * Tiny Carousel 1.8

 * http://www.baijs.nl/tinycarousel

 *

 * Copyright 2010, Maarten Baijs

 * Dual licensed under the MIT or GPL Version 2 licenses.

 * http://www.opensource.org/licenses/mit-license.php

 * http://www.opensource.org/licenses/gpl-2.0.php

 *

 * Date: 10 / 11 / 2010

 * Depends on library: jQuery

 */

(function($){

	$.fn.tinycarousel = function(options){

		var defaults = { 

			start: 1, // where should the carousel start?

			display: 1, // how many blocks do you want to move at 1 time?

			axis: 'x', // vertical or horizontal scroller? ( x || y ).

			controls: true, // show left and right navigation buttons.

			pager: false, // is there a page number navigation present?

			interval: false, // move to another block on intervals.

			intervaltime: 5000, // interval time in milliseconds.

			rewind: false, // If interval is true and rewind is true it will play in reverse if the last slide is reached.

			animation: true, // false is instant, true is animate.

			duration: 1000, // how fast must the animation move in ms?

			callback: null // function that executes after every move

		};

		var options = $.extend(defaults, options);  



		var oSlider = $(this);

		var oViewport = $('.viewport:first', oSlider);

		var oContent = $('.overview:first', oSlider);

		var oPages = oContent.children();

		var oBtnNext = $('.next:first', oSlider);

		var oBtnPrev = $('.prev:first', oSlider);

		var oPager = $('.pager:first', oSlider);

		var iPageSize, iSteps, iCurrent, oTimer, bPause, bForward = true, bAxis = options.axis == 'x';



		return this.each(function(){

			initialize();

		});

		function initialize(){

			iPageSize = bAxis ? $(oPages[0]).outerWidth(true) : $(oPages[0]).outerHeight(true);

			var iLeftover = Math.ceil(((bAxis ? oViewport.outerWidth() : oViewport.outerHeight()) / (iPageSize * options.display)) -1);

			iSteps = Math.max(1, Math.ceil(oPages.length / options.display) - iLeftover);

			iCurrent = Math.min(iSteps, Math.max(1, options.start)) -2;

			oContent.css(bAxis ? 'width' : 'height', (iPageSize * oPages.length));

			move(1);

			setEvents();

		}

		function setEvents(){

			if(options.controls && oBtnPrev.length > 0 && oBtnNext.length > 0){

				oBtnPrev.click(function(){move(-1); return false;});

				oBtnNext.click(function(){move( 1); return false;});

			}

			if(options.interval){

				oSlider.hover(function(){clearTimeout(oTimer); bPause = true},function(){bPause = false; setTimer();});

			}

			if(options.pager && oPager.length > 0){

				$('a',oPager).click(setPager);

			}

		}

		function setButtons(){

			if(options.controls){

				oBtnPrev.toggleClass('disable', !(iCurrent > 0));

				oBtnNext.toggleClass('disable', !(iCurrent +1 < iSteps));

			}

			if(options.pager){

				var oNumbers = $('.pagenum', oPager);

				oNumbers.removeClass('active');

				$(oNumbers[iCurrent]).addClass('active');

			}			

		}		

		function setPager(oEvent){

			if($(this).hasClass('pagenum')){

				iCurrent = parseInt(this.rel) -1;

				move(1);

			}

			return false;

		}

		function setTimer(){

			if(options.interval && !bPause){

				clearTimeout(oTimer);

				oTimer = setTimeout(function(){

					iCurrent = !options.rewind && (iCurrent +1 == iSteps) ? -1 : iCurrent;

					bForward = iCurrent +1 == iSteps ? false : iCurrent == 0 ? true : bForward;

					move((options.rewind ? (bForward ? 1 : -1) : 1));

				}, options.intervaltime);

			}

		}

		function move(iDirection){

			if(iCurrent + iDirection > -1 && iCurrent + iDirection < iSteps){

				iCurrent += iDirection;

				var oPosition = {};

				oPosition[bAxis ? 'left' : 'top'] = -(iCurrent * (iPageSize * options.display));	

				oContent.animate(oPosition,{

					queue: false,

					duration: options.animation ? options.duration : 0,

					complete: function(){

						if(typeof options.callback == 'function')

						options.callback.call(this, oPages[iCurrent], iCurrent);

					}

				});

				setButtons();

				setTimer();

			}

		}

	};

})(jQuery);