/*
* Accordionza jQuery Plugin
* Copyright 2010, Geert De Deckere <geert@idoe.be>
*/
(function ($) {

    // Accordionza version
    var version = '1.0.2';

    $.fn.accordionza = function (options) {

        // Merge all the options (recursively)
        var o = $.extend(true, {}, $.fn.accordionza.defaults, options);

        // Loop over each accordion
        this.each(function () {

            // Cache selector operations
            var $accordion = $(this);
            var $slides = $accordion.children('li');
            var $firstSlide = $slides.filter(':first');
            var $lastSlide = $slides.filter(':last');
            var $activeSlide = $slides.filter('.' + o.classSlideOpened);

            // Calculate widths and heights
            var width = $accordion.width();
            var height = $accordion.height();
            var slideMinWidth = (o.slideWidthClosed === false) ? $slides.filter(':not(.' + o.classSlideOpened + '):first').find('.' + o.classHandle + ':first').outerWidth() : o.slideWidthClosed;
            var slideMaxWidth = width - ($slides.length - 1) * slideMinWidth;

            // Handlers for setInterval and setTimeout
            var autoPlayInterval;
            var autoPlayTimeout;

            // Used for o.pauseOnHover functionality
            var autoPlayPaused = false;

            // Setup the accordion (wrapper)
            $accordion.css({
                'position': 'relative',
                'overflow': 'hidden'
            });

            // Setup the slides
            $slides.css({
                'position': 'absolute',
                'top': '0',
                'width': slideMaxWidth + 'px',
                'height': height + 'px'
            });

            // Position each slide
            $slides.each(function (i) {
                // We also store the order for each slide (starting with zero)
                // This will come in handy later
                $(this).css('left', i * slideMinWidth + 'px').data('order', i);
            });

            // Hide the captions
            $('.' + o.classCaption, $slides).css('top', height + 'px');

            // Start autoplaying
            function startAutoPlay() {

                // Make sure we don't start a double interval
                stopAutoPlay();

                autoPlayInterval = setInterval(function () {
                    // If not temporarily paused, trigger the next slide
                    if (!autoPlayPaused) {
                        nextSlide().trigger('slide');
                    }
                }, o.slideDelay);
            }

            // Stop autoplaying
            function stopAutoPlay() {
                clearInterval(autoPlayInterval);
            }

            // Pause autoplaying for a while
            function pauseAutoPlay(delay) {
                // Set the default delay value
                if (delay === undefined) {
                    var delay = o.autoRestartDelay;
                }

                stopAutoPlay();

                // If the delay has been set to false (or 0),
                // we won't restart autoplaying the slides.
                if (delay === false) {
                    return;
                }

                // Clear any possible previous calls to this function
                clearTimeout(autoPlayTimeout);

                // Note: on top of the delay value below, you have to add the default o.slideDelay time
                // to get the actual time the next slide gets triggered. This is because setInterval() in
                // startAutoPlay() waits one delay iteration before starting.
                autoPlayTimeout = setTimeout(function () {
                    startAutoPlay();
                }, delay);
            }

            // Returns the previous slide
            function prevSlide(loop) {
                if (loop === undefined) {
                    var loop = true;
                }
                var $prevSlide = $activeSlide.prev();
                if ($prevSlide.length) {
                    return $prevSlide;
                } else if (loop) {
                    return $lastSlide;
                } else {
                    return $activeSlide;
                }
            }

            // Returns the next slide
            function nextSlide(loop) {
                if (loop === undefined) {
                    var loop = true;
                }
                var $nextSlide = $activeSlide.next();
                if ($nextSlide.length) {
                    return $nextSlide;
                } else if (loop) {
                    return $firstSlide;
                } else {
                    return $activeSlide;
                }
            }

            // Some slide was activated by the user
            $slides.bind(o.slideTrigger, function () {
                pauseAutoPlay();
                $(this).trigger('slide');
            });

            // Some slide was activated
            $slides.bind('slide', function () {
                // Ignore clicks on an already opened slide
                if ($(this).hasClass(o.classSlideOpened)) {
                    return;
                }

                // Switch the classSlideOpened
                $activeSlide.removeClass(o.classSlideOpened);
                $(this).addClass(o.classSlideOpened);

                // Move all following slides to the right, and all preceding slides to the left
                $slides.filter(':gt(' + $(this).data('order') + ')').each(function () {
                    $(this).stop(true).animate({ left: slideMaxWidth + ($(this).data('order') - 1) * slideMinWidth + 'px' }, o.slideSpeed, o.slideEasing);
                }).end().filter(':lt(' + ($(this).data('order') + 1) + ')').each(function () {
                    $(this).stop(true).animate({ left: $(this).data('order') * slideMinWidth + 'px' }, o.slideSpeed, o.slideEasing);
                });

                // Hide the old caption, show the new one
                $('.' + o.classCaption, $activeSlide).stop(true).animate({ top: height + 'px' }, o.captionSpeed, o.captionEasing);
                // Note: using delay() here from jQuery 1.4 instead of the "animate({opacity:0},delay)" trick from http://www.learningjquery.com/2007/01/effect-delay-trick
                //       Using opacity here would cause PNG transparency to break in IE
                $('.' + o.classCaption, $(this)).stop(true).delay(o.captionDelay).animate({ top: height - o.captionHeight + 'px' }, o.captionSpeed, o.captionEasing);

                // User-defined callbacks
                if ($.isFunction(o.onSlideClose)) {
                    o.onSlideClose.call($activeSlide);
                }
                if ($.isFunction(o.onSlideOpen)) {
                    o.onSlideOpen.call($(this));
                }

                // Custom event hook
                $.event.trigger('accordionza_slide');

                // Voilà , we've got a new open slide
                $activeSlide = $(this);
            });

            // Animate and toggle the caption
            $slides.find('.' + o.classCaptionToggle).click(function () {
                pauseAutoPlay();

                // Find the caption this classCaptionToggle instance belongs to
                // Note: we don't assume classCaptionToggle is an ancestor of the caption
                var $caption = $(this).closest('li').find('.' + o.classCaption);

                if (!$activeSlide.hasClass(o.classCaptionCollapsed)) {
                    // Move the caption down
                    $caption.stop(true).animate({ top: height - o.captionHeightClosed + 'px' }, o.captionSpeed, o.captionEasing);
                } else {
                    // Move the caption back up
                    $caption.stop(true).animate({ top: height - o.captionHeight + 'px' }, o.captionSpeed, o.captionEasing);
                }

                $activeSlide.toggleClass(o.classCaptionCollapsed);
            });

            // Keyboard navigation
            if (o.navKey) {
                $(document.documentElement).keyup(function (event) {
                    // Left arrow key
                    if (event.which == 37) {
                        prevSlide().trigger(o.slideTrigger);
                        // Right arrow key
                    } else if (event.which == 39) {
                        nextSlide().trigger(o.slideTrigger);
                    }
                });
            }

            // Open up the start slide.
            // Note: this code needs to come after the 'slide' binding to $slides.
            if ($activeSlide.length) {
                // If a slide with the classSlideOpened exists,
                // we trigger the previous one so the correct slide opens up.
                prevSlide().trigger('slide');
            } else {
                // If no slide with the classSlideOpened is found,
                // we open up the first slide.
                $lastSlide.addClass(o.classSlideOpened);
                $activeSlide = $lastSlide;
                $firstSlide.trigger('slide');
            }

            // Start autoplaying
            if (o.autoPlay) {
                // Temporarily pause the slideshow on hover
                if (o.pauseOnHover) {
                    $accordion.mouseenter(function () {
                        autoPlayPaused = true;
                    }).mouseleave(function () {
                        autoPlayPaused = false;
                    });
                }

                startAutoPlay();
            }
        });

        // Make chainable
        return this;
    };

    // The complete list of default options
    $.fn.accordionza.defaults = {
        autoPlay: false,
        autoRestartDelay: false,
        captionDelay: 0,
        captionEasing: 'swing',
        captionHeight: 50,
        captionHeightClosed: 0,
        captionSpeed: 500,
        classSlideOpened: 'slide_opened',
        classCaption: 'slide_caption',
        classCaptionCollapsed: 'slide_caption_collapsed',
        classCaptionToggle: 'slide_caption_toggle',
        classHandle: 'slide_handle',
        navKey: false,
        onSlideClose: null,
        onSlideOpen: null,
        pauseOnHover: false,
        slideDelay: 5000,
        slideEasing: 'swing',
        slideSpeed: 500,
        slideTrigger: 'click',
        slideWidthClosed: false
    };

})(jQuery);