/*

Title:		jShowOff: a jQuery Content Rotator Plugin
Author:		Erik Kallevig
Version:	0.1.2
Website:	http://ekallevig.com/jshowoff
License: 	Dual licensed under the MIT and GPL licenses.

jShowOff Options

animatePause :		whether to use 'Pause' animation text when pausing [boolean, defaults to true]
autoPlay :			whether to start playing immediately [boolean, defaults to true]
changeSpeed :		speed of transition [integer, milliseconds, defaults to 600]
controls :			whether to create & display controls (Play/Pause, Previous, Next) [boolean, defaults to true]
controlText :		custom text for controls [object, 'play', 'pause', 'previous' and 'next' properties]
cssClass :			custom class to add to .jshowoff wrapper [string]
effect :			transition effect [string: 'fade', 'slideLeft' or 'none', defaults to 'fade']
hoverPause :		whether to pause on hover [boolean, defaults to true]
links :				whether to create & display numeric links to each slide [boolean, defaults to true]
speed :				time each slide is shown [integer, milliseconds, defaults to 3000]

*/

(function ($) {

	$.fn.jshowoff = function (settings) {

		// default global vars
		var config = {
			animatePause: true,
			autoPlay: true,
			changeSpeed: 600,
			controls: true,
			controlText: {
				play: 'Play',
				pause: 'Pause',
				next: 'Next',
				previous: 'Previous'
			},
			effect: 'fade',
			hoverPause: true,
			links: true,
			speed: 3000
		};

		// merge default global variables with custom variables, modifying 'config'
		if (settings) $.extend(true, config, settings);

		// make sure speed is at least 20ms longer than changeSpeed
		if (config.speed < (config.changeSpeed + 20)) {
			alert('jShowOff: Make speed at least 20ms longer than changeSpeed; the fades aren\'t always right on time.');
			return this;
		};

		// create slideshow for each matching element invoked by .jshowoff()
		this.each(function (i) {

			// declare instance variables
			var $cont = $(this);
			var gallery = $(this).children().remove();
			var timer = '';
			var counter = 0;
			var preloadedImg = [];
			var howManyInstances = $('.jshowoff').length + 1;
			var uniqueClass = 'jshowoff-' + howManyInstances;
			var cssClass = config.cssClass != undefined ? config.cssClass : '';

			// set up wrapper
			$cont.css('position', 'relative').wrap('<div class="slide ' + uniqueClass + '" />');
			var $wrap = $('.' + uniqueClass);
			$wrap.css('position', 'relative').addClass(cssClass);

			// add first slide to wrapper
			$(gallery[0]).clone().appendTo($cont);

			// preload slide images into memory
			preloadImg();

			// add controls
			if (config.controls) {
				addControls();
				if (config.autoPlay == false) {
					$('.' + uniqueClass + '-play').addClass(uniqueClass + '-paused jshowoff-paused').text(config.controlText.play);
				};
			};

			// add slide links
			if (config.links) {
				addSlideLinks();
				$('.' + uniqueClass + '-slidelinks li').eq(0).addClass(uniqueClass + '-active active');
				//$('.'+uniqueClass+'-slidelinks li').eq(0).addClass(uniqueClass+'-active jshowoff-active');
			};

			// pause slide rotation on hover
			if (config.hoverPause) {
				$cont.hover(
				function () {
					if (isPlaying()) pause('hover');
				},
				function () {
					if (isPlaying()) play('hover');
				});
			};

			// determine autoPlay
			if (config.autoPlay && gallery.length > 1) {
				timer = setInterval(function () {
					play();
				},
				config.speed);
			};

			// display error message if no slides present
			if (gallery.length < 1) {
				$('.' + uniqueClass).append('<p>For jShowOff to work, the container element must have child elements.</p>');
			};

			// utility for loading slides
			function transitionTo(gallery, index) {

				var oldCounter = counter;
				if ((counter >= gallery.length) || (index >= gallery.length)) {
					counter = 0;
					var e2b = true;
				} else if ((counter < 0) || (index < 0)) {
					counter = gallery.length - 1;
					var b2e = true;
				} else {
					counter = index;
				}

				if (config.effect == 'slideLeft') {
					var newSlideDir, oldSlideDir;


					function slideDir(dir) {
						newSlideDir = dir == 'right' ? 'left' : 'right';
						oldSlideDir = dir == 'left' ? 'left' : 'right';
					};

					counter >= oldCounter ? slideDir('left') : slideDir('right');

					$(gallery[counter]).clone().appendTo($cont).slideIt({
						direction: newSlideDir,
						changeSpeed: config.changeSpeed
					});
					if ($cont.children().length > 1) {
						$cont.children().eq(0).css('position', 'absolute').slideIt({
							direction: oldSlideDir,
							showHide: 'hide',
							changeSpeed: config.changeSpeed
						},
						function () {
							$(this).remove();
						});
					};
				} else if (config.effect == 'fade') {
					$(gallery[counter]).clone().appendTo($cont).hide().fadeIn(config.changeSpeed, function () {
						if ($.browser.msie) this.style.removeAttribute('filter');
					});
					if ($cont.children().length > 1) {
						$cont.children().eq(0).css('position', 'absolute').fadeOut(config.changeSpeed, function () {
							$(this).remove();
						});
					};
				} else if (config.effect == 'none') {
					$(gallery[counter]).clone().appendTo($cont);
					if ($cont.children().length > 1) {
						$cont.children().eq(0).css('position', 'absolute').remove();
					};
				};

				// update active class on slide link
				if (config.links) {
					$('.' + uniqueClass + '-active').removeClass(uniqueClass + '-active active');
					$('.' + uniqueClass + '-slidelinks li').eq(counter).addClass(uniqueClass + '-active active');
				};
			};

			// is the rotator currently in 'play' mode
			function isPlaying() {
				return $('.' + uniqueClass + '-play').hasClass('jshowoff-paused') ? false : true;
			};

			// start slide rotation on specified interval
			function play(src) {
				if (!isBusy()) {
					counter++;
					transitionTo(gallery, counter);
					if (src == 'hover' || !isPlaying()) {
						timer = setInterval(function () {
							play();
						},
						config.speed);
					}
					if (!isPlaying()) {
						$('.' + uniqueClass + '-play').text(config.controlText.pause).removeClass('jshowoff-paused ' + uniqueClass + '-paused');
					}
				};
			};

			// stop slide rotation
			function pause(src) {
				clearInterval(timer);
				if (!src || src == 'playBtn') $('.' + uniqueClass + '-play').text(config.controlText.play).addClass('jshowoff-paused ' + uniqueClass + '-paused');
				if (config.animatePause && src == 'playBtn') {
					$('<p class="' + uniqueClass + '-pausetext jshowoff-pausetext">' + config.controlText.pause + '</p>').css({
						fontSize: '62%',
						textAlign: 'center',
						position: 'absolute',
						top: '40%',
						lineHeight: '100%',
						width: '100%'
					}).appendTo($wrap).addClass(uniqueClass + 'pauseText').animate({
						fontSize: '600%',
						top: '30%',
						opacity: 0
					},
					{
						duration: 500,
						complete: function () {
							$(this).remove();
						}
					});
				}
			};

			// load the next slide
			function next() {
				goToAndPause(counter + 1);
			};

			// load the previous slide
			function previous() {
				goToAndPause(counter - 1);
			};

			// is the rotator in mid-transition
			function isBusy() {
				return $cont.children().length > 1 ? true : false;
			};

			// load a specific slide
			function goToAndPause(index) {
				$cont.children().stop(true, true);
				if ((counter != index) || ((counter == index) && isBusy())) {
					if (isBusy()) $cont.children().eq(0).remove();
					transitionTo(gallery, index);
					pause();
				};
			};

			// load images into memory
			function preloadImg() {
				$(gallery).each(function (i) {
					$(this).find('img').each(function (i) {
						preloadedImg[i] = $('<img>').attr('src', $(this).attr('src'));
					});
				});
			};

			// generate and add play/pause, prev, next controls
			function addControls() {
				$wrap.append('<p class="jshowoff-controls ' + uniqueClass + '-controls"><a class="jshowoff-play ' + uniqueClass + '-play" href="#null">' + config.controlText.pause + '</a> <a class="jshowoff-prev ' + uniqueClass + '-prev" href="#null">' + config.controlText.previous + '</a> <a class="jshowoff-next ' + uniqueClass + '-next" href="#null">' + config.controlText.next + '</a></p>');
				$('.' + uniqueClass + '-controls a').each(function () {
					if ($(this).hasClass('jshowoff-play')) $(this).click(function () {
						isPlaying() ? pause('playBtn') : play();
						return false;
					});
					if ($(this).hasClass('jshowoff-prev')) $(this).click(function () {
						previous();
						return false;
					});
					if ($(this).hasClass('jshowoff-next')) $(this).click(function () {
						next();
						return false;
					});

				});
			};

			// generate and add slide links
			/*function addSlideLinks() {
			$wrap.append('<p class="jshowoff-slidelinks '+uniqueClass+'-slidelinks"></p>');
			$.each(gallery, function(i, val) {
			var linktext = $(this).attr('title') != '' ? $(this).attr('title') : i+1;
			$('<a class="jshowoff-slidelink-'+i+' '+uniqueClass+'-slidelink-'+i+'" href="#null">'+linktext+'</a>').bind('click', {index:i}, function(e){ goToAndPause(e.data.index); return false; }).appendTo('.'+uniqueClass+'-slidelinks');
			});
			};*/
			function addSlideLinks() {
				$wrap.append('<div class="events ' + uniqueClass + '-slidelinks"><ul></ul></div>');
				$.each(gallery, function (i, val) {
					var linktext = $(this).attr('title') != '' ? $(this).attr('title') : i + 1;
					var linkURL = $(this).attr('href') != '' ? $(this).attr('href') : i + 1;
					$('<li><a class="jshowoff-slidelink-' + i + ' ' + uniqueClass + '-slidelink-' + i + '" href="' + linkURL + '">' + linktext + '</a></li>').bind('click', {
						index: i
					},
					function (e) {
						goToAndPause(e.data.index);
						return true;
					}).appendTo('.' + uniqueClass + '-slidelinks ul');
				});
			};

			// end .each
		});

		return this;

		// end .jshowoff
	};

	// end closure
})(jQuery);

(function($) {

	$.fn.slideIt = function(settings, callback) {

		// default global vars
		var config = {
			direction: 'left',
			showHide: 'show',
			changeSpeed: 600
		};

		// merge default global variables with custom variables, modifying 'config'
		if (settings) $.extend(config, settings);

		this.each(function(i) {
			$(this).css({
				left: 'auto',
				right: 'auto',
				top: 'auto',
				bottom: 'auto'
			});
			var measurement = (config.direction == 'left') || (config.direction == 'right') ? $(this).outerWidth() : $(this).outerHeight();
			var startStyle = {};
			startStyle['position'] = $(this).css('position') == 'static' ? 'relative' : $(this).css('position');
			startStyle[config.direction] = (config.showHide == 'show') ? '-' + measurement + 'px' : 0;
			var endStyle = {};
			endStyle[config.direction] = config.showHide == 'show' ? 0 : '-' + measurement + 'px';
			$(this).css(startStyle).animate(endStyle, config.changeSpeed, callback);
			// end .each
		});

		return this;

		// end .slideIt
	};

	// end closure
})(jQuery);