/*******************************************************
gallery.js
Project: CNH / Case CE Global
Creation Date: 08/04/2011
Author: samuel.pampolini and bruno.augusto@bhtec.com.br
*******************************************************/

$(document).ready(function() {
	
	var containerImageFullSite = ".ImageGallery";
	var imgFullSite = $(".FullImageGallery");
	var gallery = ".Gallery";
	var galleryThumbs = ".GalleryThumbs";
	var galleryItems = $(galleryThumbs).children("ul").children("li").children("a");
	
	var visibleItems = 3;

	function ChangeImage(galleryThumbs, index)
	{
		if($(".GalleryThumbs ul").children().length > 0)
		{
			var classDisabled = "disabled";
		
			var nextImage = $(galleryThumbs).parents(gallery).find(".BtnFullImageGalleryNext");
			var prevImage = $(galleryThumbs).parents(gallery).find(".BtnFullImageGalleryPrev");
		
			var items = galleryThumbs.itemLength;
			var current = galleryThumbs.curr;
			var currentItem = galleryThumbs.activeItem;
			var totalPages = parseInt(items / visibleItems);
			
			if(totalPages < (items / visibleItems))
				totalPages++;
			
			galleryThumbs.activeItem = index;
			
			current = galleryThumbs.activeItem > (items - visibleItems) ? (items - visibleItems) : galleryThumbs.activeItem;		
			
//			if(galleryThumbs.activeItem % visibleItems == 0)//first item on the page, change page
//				galleryThumbs.go(current);
//			else if((galleryThumbs.activeItem + 1)% visibleItems == 0)//last page, change page
//				galleryThumbs.go(galleryThumbs.activeItem + 1 - visibleItems);
//			else if((galleryThumbs.activeItem + 1) == items)//last item, change page
//				galleryThumbs.go(galleryThumbs.activeItem + 1 - visibleItems);
//			else //middle item, same page
//				galleryThumbs.curr = current;
			
			prevImage.removeClass(classDisabled);
			nextImage.removeClass(classDisabled);
			
			var currentPage = parseInt((galleryThumbs.activeItem * totalPages) / items) + 1;

			if(currentPage == 1 || totalPages == 1) {
				if(galleryThumbs.activeItem <= 0)
					prevImage.addClass(classDisabled);
				
				//if(totalPages == 1)
					//nextImage.addClass(classDisabled);
			}
			else if(currentPage >= totalPages && (galleryThumbs.activeItem + 1) >= items)//last item
				nextImage.addClass(classDisabled);
					
			if(galleryThumbs.activeItem >= 0 && galleryThumbs.activeItem < items) {
				var item = $($(galleryThumbs).find("a")[galleryThumbs.activeItem]);
			
				$(galleryThumbs).find("li").removeClass("ActiveItem");
				$(item).parent().addClass("ActiveItem");
				
				$(galleryThumbs).parents(containerImageFullSite).find(imgFullSite).attr("src", $(item).attr("href"));
		
				if($(item).attr("rel") != ""){
					$(galleryThumbs).parents(containerImageFullSite).find(".BtnDownloadImageGallery").show();
					$(galleryThumbs).parents(containerImageFullSite).find(".BtnDownloadImageGallery a", $(galleryThumbs)).attr("href", $(item).attr("rel"));
				} else {
					$(galleryThumbs).parents(containerImageFullSite).find(".BtnDownloadImageGallery", $(galleryThumbs)).hide();
				}
			}
			else {
				galleryThumbs.activeItem = currentItem;
			}
		}
	}

	
	
	// control full image left arrow click
	$(".BtnFullImageGalleryPrev", $(gallery)).click(function(e){
		var gall = $(this).parents(gallery)[0];
		var currentGallery = $(galleryThumbs, gall)[0];
	
		currentGallery.activeItem -=1;

		buildFullImage (currentGallery);
		e.preventDefault();
	});
	
	// control full image right arrow click
	$(".BtnFullImageGalleryNext", $(gallery)).click(function(e){
		var gall = $(this).parents(gallery)[0];
		var currentGallery = $(galleryThumbs, gall)[0];
	
		currentGallery.activeItem +=1;
	
		buildFullImage (currentGallery);

		e.preventDefault();
	});
	
	// build full image
	buildFullImage = function(gallery){  
		ChangeImage(gallery, gallery.activeItem);
	}	
	
	$(galleryThumbs).jCarouselLite({
		btnNext: ".BtnThumbsGalleryNext",
		btnPrev: ".BtnThumbsGalleryPrev",
		containerParentButtons: ".ThumbnailWrapper",
		clickImage: buildFullImage,
		circular: false,
		visible: visibleItems
	});
	
	//init
	$(galleryThumbs).each(function() {
		buildFullImage(this);
	});
});




/**
 * jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget.
 * @requires jQuery v1.2 or above
 *
 * http://gmarwaha.com/jquery/jcarousellite/
 *
 * Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * Version: 1.0.1
 * Note: Requires jquery 1.2 or above from version 1.0.1
 */

/**
 * Creates a carousel-style navigation widget for images/any-content from a simple HTML markup.
 *
 * The HTML markup that is used to build the carousel can be as simple as...
 *
 *  <div class="carousel">
 *      <ul>
 *          <li><img src="image/1.jpg" alt="1"></li>
 *          <li><img src="image/2.jpg" alt="2"></li>
 *          <li><img src="image/3.jpg" alt="3"></li>
 *      </ul>
 *  </div>
 *
 * As you can see, this snippet is nothing but a simple div containing an unordered list of images.
 * You don't need any special "class" attribute, or a special "css" file for this plugin.
 * I am using a class attribute just for the sake of explanation here.
 *
 * To navigate the elements of the carousel, you need some kind of navigation buttons.
 * For example, you will need a "previous" button to go backward, and a "next" button to go forward.
 * This need not be part of the carousel "div" itself. It can be any element in your page.
 * Lets assume that the following elements in your document can be used as next, and prev buttons...
 *
 * <button class="prev">&lt;&lt;</button>
 * <button class="next">&gt;&gt;</button>
 *
 * Now, all you need to do is call the carousel component on the div element that represents it, and pass in the
 * navigation buttons as options.
 *
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev"
 * });
 *
 * That's it, you would have now converted your raw div, into a magnificient carousel.
 *
 * There are quite a few other options that you can use to customize it though.
 * Each will be explained with an example below.
 *
 * @param an options object - You can specify all the options shown below as an options object param.
 *
 * @option btnPrev, btnNext : string - no defaults
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev"
 * });
 * @desc Creates a basic carousel. Clicking "btnPrev" navigates backwards and "btnNext" navigates forward.
 *
 * @option btnGo - array - no defaults
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      btnGo: [".0", ".1", ".2"]
 * });
 * @desc If you don't want next and previous buttons for navigation, instead you prefer custom navigation based on
 * the item number within the carousel, you can use this option. Just supply an array of selectors for each element
 * in the carousel. The index of the array represents the index of the element. What i mean is, if the
 * first element in the array is ".0", it means that when the element represented by ".0" is clicked, the carousel
 * will slide to the first element and so on and so forth. This feature is very powerful. For example, i made a tabbed
 * interface out of it by making my navigation elements styled like tabs in css. As the carousel is capable of holding
 * any content, not just images, you can have a very simple tabbed navigation in minutes without using any other plugin.
 * The best part is that, the tab will "slide" based on the provided effect. :-)
 *
 * @option mouseWheel : boolean - default is false
 * @example
 * $(".carousel").jCarouselLite({
 *      mouseWheel: true
 * });
 * @desc The carousel can also be navigated using the mouse wheel interface of a scroll mouse instead of using buttons.
 * To get this feature working, you have to do 2 things. First, you have to include the mouse-wheel plugin from brandon.
 * Second, you will have to set the option "mouseWheel" to true. That's it, now you will be able to navigate your carousel
 * using the mouse wheel. Using buttons and mouseWheel or not mutually exclusive. You can still have buttons for navigation
 * as well. They complement each other. To use both together, just supply the options required for both as shown below.
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      mouseWheel: true
 * });
 *
 * @option auto : number - default is null, meaning autoscroll is disabled by default
 * @example
 * $(".carousel").jCarouselLite({
 *      auto: 800,
 *      speed: 500
 * });
 * @desc You can make your carousel auto-navigate itself by specfying a millisecond value in this option.
 * The value you specify is the amount of time between 2 slides. The default is null, and that disables auto scrolling.
 * Specify this value and magically your carousel will start auto scrolling.
 *
 * @option speed : number - 200 is default
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      speed: 800
 * });
 * @desc Specifying a speed will slow-down or speed-up the sliding speed of your carousel. Try it out with
 * different speeds like 800, 600, 1500 etc. Providing 0, will remove the slide effect.
 *
 * @option easing : string - no easing effects by default.
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      easing: "bounceout"
 * });
 * @desc You can specify any easing effect. Note: You need easing plugin for that. Once specified,
 * the carousel will slide based on the provided easing effect.
 *
 * @option vertical : boolean - default is false
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      vertical: true
 * });
 * @desc Determines the direction of the carousel. true, means the carousel will display vertically. The next and
 * prev buttons will slide the items vertically as well. The default is false, which means that the carousel will
 * display horizontally. The next and prev items will slide the items from left-right in this case.
 *
 * @option circular : boolean - default is true
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      circular: false
 * });
 * @desc Setting it to true enables circular navigation. This means, if you click "next" after you reach the last
 * element, you will automatically slide to the first element and vice versa. If you set circular to false, then
 * if you click on the "next" button after you reach the last element, you will stay in the last element itself
 * and similarly for "previous" button and first element.
 *
 * @option visible : number - default is 3
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      visible: 4
 * });
 * @desc This specifies the number of items visible at all times within the carousel. The default is 3.
 * You are even free to experiment with real numbers. Eg: "3.5" will have 3 items fully visible and the
 * last item half visible. This gives you the effect of showing the user that there are more images to the right.
 *
 * @option start : number - default is 0
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      start: 2
 * });
 * @desc You can specify from which item the carousel should start. Remember, the first item in the carousel
 * has a start of 0, and so on.
 *
 * @option scrool : number - default is 1
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      scroll: 2
 * });
 * @desc The number of items that should scroll/slide when you click the next/prev navigation buttons. By
 * default, only one item is scrolled, but you may set it to any number. Eg: setting it to "2" will scroll
 * 2 items when you click the next or previous buttons.
 *
 * @option beforeStart, afterEnd : function - callbacks
 * @example
 * $(".carousel").jCarouselLite({
 *      btnNext: ".next",
 *      btnPrev: ".prev",
 *      beforeStart: function(a) {
 *          alert("Before animation starts:" + a);
 *      },
 *      afterEnd: function(a) {
 *          alert("After animation ends:" + a);
 *      }
 * });
 * @desc If you wanted to do some logic in your page before the slide starts and after the slide ends, you can
 * register these 2 callbacks. The functions will be passed an argument that represents an array of elements that
 * are visible at the time of callback.
 *
 *
 * @cat Plugins/Image Gallery
 * @author Ganeshji Marwaha/ganeshread@gmail.com
 */

(function ($) {                                          // Compliant with jquery.noConflict()
    $.fn.jCarouselLite = function (o) {
        o = $.extend({
            btnPrev: null,
            btnNext: null,
            containerParentButtons: null,
            clickImage: null,
            activeItem: 0,
            btnGo: null,
            mouseWheel: false,
            auto: null,

            speed: 200,
            easing: null,

            vertical: false,
            circular: true,
            visible: 3,
            start: 0,
            scroll: 1,

            beforeStart: null,
            afterEnd: null
        }, o || {});

        return this.each(function () {                           // Returns the element collection. Chainable.

            var _this = this;

            _this.activeItem = o.activeItem;

            var running = false, animCss = o.vertical ? "top" : "left", sizeCss = o.vertical ? "height" : "width";
            var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;

            if (o.circular) {
                ul.prepend(tLi.slice(tl - v - 1 + 1).clone())
              .append(tLi.slice(0, v).clone());
                o.start += v;
            }

            if (ul.children().length > 0) {
                var li = $("li", ul);
                this.itemLength = li.size();
                this.curr = o.start;

                div.css("visibility", "visible");

                li.css({ overflow: "hidden", float: o.vertical ? "none" : "left" });
                ul.css({ margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1" });
                div.css({ overflow: "hidden", position: "relative", "z-index": "2", left: "0px" });

                var liSize = o.vertical ? height(li) : width(li);   // Full li size(incl margin)-Used for animation
                var ulSize = liSize * _this.itemLength;                   // size of full ul(total length, not just for the visible items)
                var divSize = liSize * v;                           // size of entire div(total length for just the visible items)

                li.css({ width: li.width(), height: li.height() });
                ul.css(sizeCss, ulSize + "px").css(animCss, -(_this.curr * liSize));

                div.css(sizeCss, divSize + "px");                     // Width of the DIV. length of visible images

                if (o.containerParentButtons) {
                    if (o.btnPrev) {

                        $(_this).parents(o.containerParentButtons).find(o.btnPrev + "," + o.btnNext).removeClass("disabled");

                        if (_this.curr - o.scroll < 0 && o.btnPrev)
                            $(_this).parents(o.containerParentButtons).find(o.btnPrev).addClass("disabled");

                        if (_this.curr + o.scroll > _this.itemLength - v && o.btnNext)
                            $(_this).parents(o.containerParentButtons).find(o.btnNext).addClass("disabled");

                        $(_this).parents(o.containerParentButtons).find(o.btnPrev).click(function () {
                            return _this.go(_this.curr - o.scroll);
                        });
                    }

                    if (o.btnNext) {
                        $(_this).parents(o.containerParentButtons).find(o.btnNext).click(function () {
                            return _this.go(_this.curr + o.scroll);
                        });
                    }
                }

                if (o.clickImage) {
                    $(_this).find("ul > li > a").each(function (index) {
                        $(this).click(function () {
                            _this.activeItem = index;
                            o.clickImage(_this);
                            return false;
                        });
                    });
                }

                if (o.btnGo)
                    $.each(o.btnGo, function (i, val) {
                        $(val).click(function () {
                            return _this.go(o.circular ? o.visible + i : i);
                        });
                    });

                if (o.mouseWheel && div.mousewheel)
                    div.mousewheel(function (e, d) {
                        return d > 0 ? _this.go(_this.curr - o.scroll) : _this.go(_this.curr + o.scroll);
                    });

                if (o.auto)
                    setInterval(function () {
                        _this.go(_this.curr + o.scroll);
                    }, o.auto + o.speed);

                function vis() {
                    return li.slice(_this.curr).slice(0, v);
                };

                this.go = function (to) {
                    if (!running) {

                        if (o.beforeStart)
                            o.beforeStart.call(this, vis());

                        if (o.circular) {            // If circular we are in first or last, then goto the other end
                            if (to <= o.start - v - 1) {           // If first, then goto last
                                ul.css(animCss, -((_this.itemLength - (v * 2)) * liSize) + "px");
                                // If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements.
                                _this.curr = to == o.start - v - 1 ? _this.itemLength - (v * 2) - 1 : _this.itemLength - (v * 2) - o.scroll;
                            } else if (to >= _this.itemLength - v + 1) { // If last, then goto first
                                ul.css(animCss, -((v) * liSize) + "px");
                                // If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements.
                                _this.curr = to == _this.itemLength - v + 1 ? v + 1 : v + o.scroll;
                            } else _this.curr = to;
                        } else {                    // If non-circular and to points to first or last, we just return.
                            if (to < 0 || to > _this.itemLength - v) return;
                            else _this.curr = to;
                        }                           // If neither overrides it, the curr will still be "to" and we can proceed.

                        running = true;

                        ul.animate(
						animCss == "left" ? { left: -(_this.curr * liSize)} : { top: -(_this.curr * liSize) }, o.speed, o.easing,
						function () {
						    if (o.afterEnd)
						        o.afterEnd.call(this, vis());
						    running = false;
						}
					);
                        // Disable buttons when the carousel reaches the last/first, and enable when not
                        if (!o.circular) {
                            if (o.containerParentButtons) {
                                $(_this).parents(o.containerParentButtons).find(o.btnPrev + "," + o.btnNext).removeClass("disabled");

                                if (_this.curr - o.scroll < 0 && o.btnPrev)
                                    $(_this).parents(o.containerParentButtons).find(o.btnPrev).addClass("disabled");

                                if (_this.curr + o.scroll > _this.itemLength - v && o.btnNext)
                                    $(_this).parents(o.containerParentButtons).find(o.btnNext).addClass("disabled");
                            }
                        }

                    }
                    return false;
                };
            }
        });
    };

    function css(el, prop) {
        return parseInt($.css(el[0], prop)) || 0;
    };
    function width(el) {
        return el.width() + css(el, 'marginLeft') + css(el, 'marginRight') + css(el, 'paddingLeft') + css(el, 'paddingRight') + css(el, 'border-right-width') + css(el, 'border-left-width');
    };
    function height(el) {
        return el.height() + css(el, 'marginTop') + css(el, 'marginBottom') + css(el, 'paddingTop') + css(el, 'paddingBottom') + css(el, 'border-top-width') + css(el, 'border-bottom-width');
    };

})(jQuery);