// when the DOM is ready...

$(document).ready(function () {

    var $panels = $('#slider .scroll-container > div'),
 		$container = $('#slider .scroll-container'),
    	$sliderNav = $('.itinerary-menu a'),
		$btnLeft = $('<img class="scrollButtons left" src="/media/images/left_arrow.png" alt="Previous" />'),
		$btnRight = $('<img class="scrollButtons right" src="/media/images/right_arrow.png" alt="Next" />')
    if($panels.length > 0 && $container.length > 0) {
        // if false, we'll float all the panels left and fix the width 
        // of the container
        var horizontal = true;

        // float the panels left if we're going horizontal
        if (horizontal) {
            $panels.css({
                'float' : 'left',
                'position' : 'relative' // IE fix to ensure overflow is hidden
            });

            // calculate a new width for the container (so it holds all panels)
            $container.css('width', $panels[0].offsetWidth * $panels.length);
        }

        // collect the scroll object, at the same time apply the hidden overflow
        // to remove the default scrollbars that will appear
        var $scroll = $('#slider .scroll').css('overflow', 'hidden');

        // apply our left + right buttons
        $scroll
            .before($btnLeft)
            .after($btnRight);

        // handle nav selection
        function selectNav() {
            $(this)
                .parents('ul:first')
                    .find('a')
                        .removeClass('selected')
                    .end()
                .end()
                .addClass('selected');
        }

        $('#slider .itinerary-menu').find('a').click(selectNav);

        // go find the itinerary-menu link that has this target and select the nav
        function trigger(data) {
            var el = $('#slider .itinerary-menu').find('a[href$="' + data.id + '"]').eq(0);
            selectNav.call(el);
			//check if the Nav item is the first or last and hide the back or forward button
			$btnRight.show();
			$btnLeft.show();
			if (el.is('a[href$="'+$sliderNav.eq(0).attr('href')+'"]'))
				$btnLeft.hide();
			else 
				if (el.is('a[href$="'+$sliderNav.eq($sliderNav.length -1).attr('href')+'"]'))
					$btnRight.hide();
		
        }

        if (window.location.hash) {
            trigger({ id : window.location.hash.substr(1) });
        } else {
            $sliderNav.eq(0).click();
			$btnLeft.hide();
        }

        // offset is used to move to *exactly* the right place, since I'm using
        // padding on my example, I need to subtract the amount of padding to
        // the offset.  Try removing this to get a good idea of the effect
        var offset = parseInt((horizontal ? 
            $container.css('paddingTop') : 
            $container.css('paddingLeft')) 
            || 0) * -1;


        var scrollOptions = {
            target: $scroll, // the element that has the overflow

            // can be a selector which will be relative to the target
            items: $panels,

            navigation: $sliderNav,

            // selectors are NOT relative to document, i.e. make sure they're unique
            prev: 'img.left', 
            next: 'img.right',

            // allow the scroll effect to run both directions
            axis: 'xy',

            onAfter: trigger, // our final callback

            offset: offset,

            // duration of the sliding effect
            duration: 500,

            // easing - can be used with the easing plugin: 
            // http://gsgd.co.uk/sandbox/jquery/easing/
            easing: 'easeOutBack'
        };

        // apply serialScroll to the slider - we chose this plugin because it 
        // supports// the indexed next and previous scroll along with hooking 
        // in to our itinerary-menu.
        $('#slider').serialScroll(scrollOptions);

        // now apply localScroll to hook any other arbitrary links to trigger 
        // the effect
        $.localScroll(scrollOptions);

        // finally, if the URL has a hash, move the slider in to position, 
        // setting the duration to 1 because I don't want it to scroll in the
        // very first page load.  We don't always need this, but it ensures
        // the positioning is absolutely spot on when the pages loads.
        scrollOptions.duration = 1;
        $.localScroll.hash(scrollOptions);
		// Change secondary nav to link to intinerary detail pages
		$('.box').eq(0).find('a').each(function(i, el){$(el).attr('href', $(el).attr('href').replace(/at-a-glance/, 'itinerary-detail'));});
		
    }
	
	

});