/*
* Slides, A Slideshow Plugin for jQuery
* Intructions: http://slidesjs.com
* By: Nathan Searles, http://nathansearles.com
* Version: 1.1.8
* Updated: June 1st, 2011
*
* andrew relkin
* 1.1.8.1
* 2011-10-11
* send both 'current' and 'next' to functions animationStart and animationComplete
* more styling for pagination
* 
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*
*/
(function ($) {

	var paginationPos = new Array;

	$.fn.slides = function (option) {
		// override defaults with specified option
		option = $.extend({}, $.fn.slides.option, option);

		return this.each(function () {
			// wrap slides in control container, make sure slides are block level
			$('.' + option.container, $(this)).children().wrapAll('<div class="slides_control"/>');

			var elem = $(this),
				control = $('.slides_control', elem),
				total = control.children().size(),
				width = control.children().outerWidth(),
				height = control.children().outerHeight(),
				start = (option.start >= total) ? total - 1 : option.start - 1,
				effect = option.effect.indexOf(',') < 0 ? option.effect : option.effect.replace(' ', '').split(',')[0],
				paginationEffect = option.effect.indexOf(',') < 0 ? effect : option.effect.replace(' ', '').split(',')[1],
				next = 0, prev = 0, number = 0, current = 0, loaded, active, clicked, position, direction, imageParent, pauseTimeout, playInterval;
			var el = "#" + $(elem)[0].id;
			var paginationPos = option.paginationPos;

			// animate slides
			function animate(direction, effect, clicked) {

				if (!active && loaded) {
					active = true;
					// start of animation

					switch (direction) {
						case 'next':
							// change current slide to previous
							prev = current;
							// get next from current + 1
							next = current + 1;
							// if last slide, set next to first slide
							next = total === next ? 0 : next;
							// set position of next slide to right of previous
							position = width * 2;
							// distance to slide based on width of slides
							direction = -width * 2;
							// store new current slide
							current = next;
							break;
						case 'prev':
							// change current slide to previous
							prev = current;
							// get next from current - 1
							next = current - 1;
							// if first slide, set next to last slide
							next = next === -1 ? total - 1 : next;
							// set position of next slide to left of previous
							position = 0;
							// distance to slide based on width of slides
							direction = 0;
							// store new current slide
							current = next;
							break;
						case 'pagination':
							// get next from pagination item clicked, convert to number
							next = parseInt(clicked, 10);
							// get previous from pagination item with class of current
							prev = $('.' + option.paginationClass + ' li.' + option.currentClass + ' a', elem).attr('href').match('[^#/]+$');
							// if next is greater then previous set position of next slide to right of previous
							if (next > prev) {
								position = width * 2;
								direction = -width * 2;
							} else {
								// if next is less then previous set position of next slide to left of previous
								position = 0;
								direction = 0;
							}
							// store new current slide
							current = next;
							break;
					}

					option.animationStart(prev, current);
					if (effect === 'switch') {
						control.children(':eq(' + prev + ')', elem).css({ display: 'none' });
						control.children(':eq(' + next + ')').css({ display: 'block' });
						// end of animation
						option.animationComplete(current, (next + 1));
						active = false;
					}
					// fade animation
					else if (effect === 'fade') {
						// fade animation with crossfade
						if (option.crossfade) {
							// put hidden next above current
							control.children(':eq(' + next + ')', elem).css({
								zIndex: 10
								// fade in next
							}).fadeIn(option.fadeSpeed, option.fadeEasing, function () {
								if (option.autoHeight) {
									// animate container to height of next
									control.animate({
										height: control.children(':eq(' + next + ')', elem).outerHeight()
									}, option.autoHeightSpeed, function () {
										// hide previous
										control.children(':eq(' + prev + ')', elem).css({
											display: 'none',
											zIndex: 0
										});
										// reset z index
										control.children(':eq(' + next + ')', elem).css({
											zIndex: 0
										});
										// end of animation
										option.animationComplete(current, (next + 1));
										active = false;
									});
								} else {
									// hide previous
									control.children(':eq(' + prev + ')', elem).css({
										display: 'none',
										zIndex: 0
									});
									// reset zindex
									control.children(':eq(' + next + ')', elem).css({
										zIndex: 0
									});
									// end of animation
									option.animationComplete(current, (next + 1));
									active = false;
								}
							});
						} else {
							// fade animation with no crossfade
							control.children(':eq(' + prev + ')', elem).fadeOut(option.fadeSpeed, option.fadeEasing, function () {
								// animate to new height
								if (option.autoHeight) {
									control.animate({
										// animate container to height of next
										height: control.children(':eq(' + next + ')', elem).outerHeight()
									}, option.autoHeightSpeed,
									// fade in next slide
									function () {
										control.children(':eq(' + next + ')', elem).fadeIn(option.fadeSpeed, option.fadeEasing);
									});
								} else {
									// if fixed height
									control.children(':eq(' + next + ')', elem).fadeIn(option.fadeSpeed, option.fadeEasing, function () {
										// fix font rendering in ie, lame
										if ($.browser.msie) {
											$(this).get(0).style.removeAttribute('filter');
										}
									});
								}
								// end of animation
								option.animationComplete(current, (next + 1));
								active = false;
							});
						}
						// slide animation
					} else {
						// move next slide to right of previous
						control.children(':eq(' + next + ')').css({
							left: position,
							display: 'block'
						});
						// animate to new height
						if (option.autoHeight) {
							control.animate({
								left: direction,
								height: control.children(':eq(' + next + ')').outerHeight()
							}, option.slideSpeed, option.slideEasing, function () {
								control.css({
									left: -width
								});
								control.children(':eq(' + next + ')').css({
									left: width,
									zIndex: 5
								});
								// reset previous slide
								control.children(':eq(' + prev + ')').css({
									left: width,
									display: 'none',
									zIndex: 0
								});
								// end of animation
								option.animationComplete(current, (next + 1));
								active = false;
							});
							// if fixed height
						} else {
							// animate control
							control.animate({
								left: direction
							}, option.slideSpeed, option.slideEasing, function () {
								// after animation reset control position
								control.css({
									left: -width
								});
								// reset and show next
								control.children(':eq(' + next + ')').css({
									left: width,
									zIndex: 5
								});
								// reset previous slide
								control.children(':eq(' + prev + ')').css({
									left: width,
									display: 'none',
									zIndex: 0
								});
								// end of animation
								option.animationComplete(current, (next + 1));
								active = false;
							});
						}
					}
					// set current state for pagination
					if (option.pagination) {
						// remove current class from all
						$('.' + option.paginationClass + ' li.' + option.currentClass, elem).removeClass(option.currentClass);
						// add current class to next
						$('.' + option.paginationClass + ' li:eq(' + next + ')', elem).addClass(option.currentClass);
					}
				}
			} // end animate function

			function stop() {
				// clear interval from stored id
				clearInterval(elem.data('interval'));
			}

			function pause() {
				if (option.pause) {
					// clear timeout and interval
					clearTimeout(elem.data('pause'));
					clearInterval(elem.data('interval'));
					// pause slide show for option.pause amount
					pauseTimeout = setTimeout(function () {
						// clear pause timeout
						clearTimeout(elem.data('pause'));
						// start play interval after pause
						playInterval = setInterval(function () {
							animate("next", effect);
						}, option.play);
						// store play interval
						elem.data('interval', playInterval);
					}, option.pause);
					// store pause interval
					elem.data('pause', pauseTimeout);
				} else {
					// if no pause, just stop
					stop();
				}
			}

			// ----------------------------------------------

			function addStyleToPagination(el, option) {

				if (paginationPos != null) {

					nW = $(el + ' .' + option.paginationClass).width();
					nH = $(el + ' .' + option.paginationClass).height();
					cW = $(el + ' .' + option.paginationClass).parent().outerWidth();
					cH = $(el + ' .' + option.paginationClass).parent().outerHeight();

					if (paginationPos["compass"]) { navStyle = paginationPosStyle(paginationPos, nW, nH, cW, cH); }

					//if (typeof (paginationPos) == "object") 
					else {
						navStyle = paginationPos;
						if (paginationPos["left"] == "center" || paginationPos["right"] == "center") { paginationPos["right"] = ""; paginationPos["left"] = paginationPosX(nW, cW); }
						if (paginationPos["top"] == "middle" || paginationPos["bottom"] == "middle") { paginationPos["bottom"] = ""; paginationPos["top"] = paginationPosY(nH, cH); }
					}

					navStyle["z-index"] = 100;
					$(el + ' .' + option.paginationClass).css(navStyle);
				}
			}; // addStyleToPagination


			function paginationPosX(nW, cW) { return Math.floor((cW / 2) - (nW / 2)) + "px"; }

			function paginationPosY(nH, cH) { return Math.floor((cH / 2) - (nH / 2)) + "px"; }

			function paginationPosStyle(pos, nW, nH, cW, cH) {
				c = pos["compass"];
				s = {};
				x = Math.floor((cW / 2) - (nW / 2));
				y = Math.floor((cH / 2) - (nH / 2));

				switch (c) {
					//  "n", "ne", "e", "se", "s", "sw", "w", "nw"   
					case 'n': s = { "top": 0, "left": (x + "px") }; break;
					case 'ne': s = { "top": 0, "right": 0 }; break;
					case 'e': s = { "top": (y + "px"), "right": 0 }; break;
					case 'se': s = { "bottom": 0, "right": 0 }; break;
					case 's': s = { "bottom": 0, "left": (x + "px") }; break;
					case 'sw': s = { "bottom": 0, "left": 0 }; break;
					case 'w': s = { "top": (y + "px"), "left": 0 }; break;
					case 'nw': s = { "top": 0, "left": 0 }; break;
					default: null;
				}
				if (pos["position"]) { s["position"] = pos["position"]; }

				return s;
			}; // paginationPosStyle

			// ----------------------------------------------

			// 2 or more slides required
			if (total < 2) { return; }

			// error corection for start slide
			if (start < 0) { start = 0; }

			if (start > total) { start = total - 1; }

			// change current based on start option number
			if (option.start) { current = start; }

			// randomizes slide order
			if (option.randomize) { control.randomize(); }

			// make sure overflow is hidden, width is set
			$('.' + option.container, elem).css({
				overflow: 'hidden',
				// fix for ie
				position: 'relative'
			});

			// set css for slides
			control.children().css({
				position: 'absolute',
				top: 0,
				left: control.children().outerWidth(),
				zIndex: 0,
				display: 'none'
			});

			// set css for control div
			control.css({
				position: 'relative',
				// size of control 3 x slide width
				width: (width * 3),
				// set height to slide height
				height: height,
				// center control to slide
				left: -width
			});

			// show slides
			$('.' + option.container, elem).css({ display: 'block' });

			// if autoHeight true, get and set height of first slide
			if (option.autoHeight) {
				control.children().css({
					height: 'auto'
				});
				control.animate({
					height: control.children(':eq(' + start + ')').outerHeight()
				}, option.autoHeightSpeed);
			}

			// checks if image is loaded
			if (option.preload && control.find('img:eq(' + start + ')').length) {
				// adds preload image
				$('.' + option.container, elem).css({
					background: 'url(' + option.preloadImage + ') no-repeat 50% 50%'
				});

				// gets image src, with cache buster
				var img = control.find('img:eq(' + start + ')').attr('src') + '?' + (new Date()).getTime();

				// check if the image has a parent
				if ($('img', elem).parent().attr('class') != 'slides_control') {
					// If image has parent, get tag name
					imageParent = control.children(':eq(0)')[0].tagName.toLowerCase();
				} else {
					// Image doesn't have parent, use image tag name
					imageParent = control.find('img:eq(' + start + ')');
				}

				// checks if image is loaded
				control.find('img:eq(' + start + ')').attr('src', img).load(function () {
					// once image is fully loaded, fade in
					control.find(imageParent + ':eq(' + start + ')').fadeIn(option.fadeSpeed, option.fadeEasing, function () {
						$(this).css({
							zIndex: 5
						});
						// removes preload image
						$('.' + option.container, elem).css({
							background: ''
						});
						// let the script know everything is loaded
						loaded = true;
						// call the loaded funciton
						option.slidesLoaded();
					});
				});
			} else {
				// if no preloader fade in start slide
				control.children(':eq(' + start + ')').fadeIn(option.fadeSpeed, option.fadeEasing, function () {
					// let the script know everything is loaded
					loaded = true;
					// call the loaded funciton
					option.slidesLoaded();
				});
			}

			// click slide for next
			if (option.bigTarget) {
				// set cursor to pointer
				control.children().css({
					cursor: 'pointer'
				});
				// click handler
				control.children().click(function () {
					// animate to next on slide click
					animate('next', effect);
					return false;
				});
			}

			// pause on mouseover
			if (option.hoverPause && option.play) {
				control.bind('mouseover', function () {
					// on mouse over stop
					stop();
				});
				control.bind('mouseleave', function () {
					// on mouse leave start pause timeout
					pause();
				});
			}

			// generate next/prev buttons
			if (option.generateNextPrev) {
				$('.' + option.container, elem).after('<a href="#" class="' + option.prev + '">Prev</a>');
				$('.' + option.prev, elem).after('<a href="#" class="' + option.next + '">Next</a>');
			}

			// next button
			$('.' + option.next, elem).click(function (e) {
				e.preventDefault();
				if (option.play) {
					pause();
				}
				animate('next', effect);
			});

			// previous button
			$('.' + option.prev, elem).click(function (e) {
				e.preventDefault();
				if (option.play) {
					pause();
				}
				animate('prev', effect);
			});

			// generate pagination
			if (option.generatePagination) {
				// create unordered list
				if (option.prependPagination) {
					elem.prepend('<ul class="' + option.paginationGlobalClass + ' ' + option.paginationClass + '"></ul>');
				} else {
					elem.append('<ul class="' + option.paginationGlobalClass + ' ' + option.paginationClass + '"></ul>');
				}
				// for each slide create a list item and link
				control.children().each(function () {
					$('.' + option.paginationClass, elem).append('<li><a href="#' + number + '">' + (number + 1) + '</a></li>');
					number++;
				});


				// add style to pagination
				addStyleToPagination(el, option);

			} else {
				// if pagination exists, add href w/ value of item number to links
				$('.' + option.paginationClass + ' li a', elem).each(function () {
					$(this).attr('href', '#' + number);
					number++;
				});
			}

			// add current class to start slide pagination
			$('.' + option.paginationClass + ' li:eq(' + start + ')', elem).addClass(option.currentClass);

			// click handling 
			$('.' + option.paginationClass + ' li a', elem).click(function () {
				// pause slideshow
				if (option.play) {
					pause();
				}
				// get clicked, pass to animate function					
				clicked = $(this).attr('href').match('[^#/]+$');
				// if current slide equals clicked, don't do anything
				if (current != clicked) {
					animate('pagination', paginationEffect, clicked);
				}
				return false;
			});

			// click handling 
			$('a.link', elem).click(function () {
				// pause slideshow
				if (option.play) { pause(); }
				// get clicked, pass to animate function					
				clicked = $(this).attr('href').match('[^#/]+$') - 1;
				// if current slide equals clicked, don't do anything
				if (current != clicked) { animate('pagination', paginationEffect, clicked); }
				return false;
			});

			if (option.play) {
				// set interval
				playInterval = setInterval(function () {
					animate('next', effect);
				}, option.play);
				// store interval id
				elem.data('interval', playInterval);
			}
		}); // return this.each
	};

	// default options
	$.fn.slides.option = {
		preload: false, // boolean, Set true to preload images in an image based slideshow
		preloadImage: 'images/global/slide/loading.gif', // string, Name and location of loading image for preloader. Default is "/img/loading.gif"
		container: 'slides_container', // string, Class name for slides container. Default is "slides_container"
		generateNextPrev: false, // boolean, Auto generate next/prev buttons
		next: 'next', // string, Class name for next button
		prev: 'prev', // string, Class name for previous button
		pagination: true, // boolean, If you're not using pagination you can set to false, but don't have to
		generatePagination: true, // boolean, Auto generate pagination
		prependPagination: false, // boolean, prepend pagination
		paginationGlobalClass: 'slidePagination',
		paginationClass: 'pagination', // string, Class name for pagination
		paginationPos: null,
		// compass points:   {"compass":"ne"}    "n", "ne", "e", "se", "s", "sw", "w", "nw"
		// CSS: {"position":"[absolute|relative]", "top":"val", "right":"val", "bottom":"val", "left":"val"}
		// null: set your own in CSS

		currentClass: 'current', // string, Class name for current class
		fadeSpeed: 350, // number, Set the speed of the fading animation in milliseconds
		fadeEasing: '', // string, must load jQuery's easing plugin before http://gsgd.co.uk/sandbox/jquery/easing/
		slideSpeed: 350, // number, Set the speed of the sliding animation in milliseconds
		slideEasing: '', // string, must load jQuery's easing plugin before http://gsgd.co.uk/sandbox/jquery/easing/
		start: 1, // number, Set the speed of the sliding animation in milliseconds
		effect: 'slide', // string, '[next/prev], [pagination]', e.g. 'slide, fade' or simply 'fade' for both
		crossfade: false, // boolean, Crossfade images in a image based slideshow
		randomize: false, // boolean, Set to true to randomize slides
		play: 0, // number, Autoplay slideshow, a positive number will set to true and be the time between slide animation in milliseconds
		pause: 0, // number, Pause slideshow on click of next/prev or pagination. A positive number will set to true and be the time of pause in milliseconds
		hoverPause: false, // boolean, Set to true and hovering over slideshow will pause it
		autoHeight: false, // boolean, Set to true to auto adjust height
		autoHeightSpeed: 350, // number, Set auto height animation time in milliseconds
		bigTarget: false, // boolean, Set to true and the whole slide will link to next slide on click
		animationStart: function () { }, // Function called at the start of animation
		animationComplete: function () { }, // Function called at the completion of animation
		slidesLoaded: function () { } // Function is called when slides is fully loaded
	};

	// Randomize slide order on load
	$.fn.randomize = function (callback) {
		function randomizeOrder() { return (Math.round(Math.random()) - 0.5); }
		return ($(this).each(function () {
			var $this = $(this);
			var $children = $this.children();
			var childCount = $children.length;
			if (childCount > 1) {
				$children.hide();
				var indices = [];
				for (i = 0; i < childCount; i++) { indices[indices.length] = i; }
				indices = indices.sort(randomizeOrder);
				$.each(indices, function (j, k) {
					var $child = $children.eq(k);
					var $clone = $child.clone(true);
					$clone.show().appendTo($this);
					if (callback !== undefined) {
						callback($child, $clone);
					}
					$child.remove();
				});
			}
		}));
	};
})(jQuery);