// when the DOM is ready...
$(document).ready(function () {

var $panels = $('#slider .scrollContainer > div');
var $container = $('#slider .scrollContainer');

// 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('<img class="scrollButtons scroll_left" src="/images/scroll_left.png" />')
   .after('<img class="scrollButtons scroll_right" src="/images/scroll_right.png" />');

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

$("#sliderbtns li:first a").addClass('selected');



// go find the navigation link that has this target and select the nav
function trigger(data) {
  var el = $('#slider .navigation').find('a[href$="' + data.id + '"]').get(0);
  selectNav.call(el);
}

if (window.location.hash) {
  trigger({ id : window.location.hash.substr(1) });
} else {
  $('ul.navigation a:first').click();
}

// 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: '.navigation a',
  
  // selectors are NOT relative to document, i.e. make sure they're unique
  prev: 'img.scroll_left', 
  next: 'img.scroll_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: 'swing'
  
};

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



// The following controls the timed sliding animations. 
var current_panel = 0;

// 10 seconds, change this to increase/decrease how long panels appear for
var ANIMATION_INTERVAL = 15000;


function get_panel_link_by_href(href) { return $('a[href$="' + href + '"]' ); }

function begin_auto_animation() {
  return setInterval(function() {
    get_panel_link_by_href($panels[current_panel].id).removeClass("selected");
    current_panel = (current_panel + 1) % $panels.length;
    $scroll.scrollTo($panels[current_panel],scrollOptions.duration);
    get_panel_link_by_href($panels[current_panel].id).addClass("selected");
  }, ANIMATION_INTERVAL);
}

// Start automatically rotating panels
var auto_animation = begin_auto_animation();

// when panel navigation link is clicked
$("#sliderbtns li a").click(function() {
  $("#sliderbtns li a.selected").removeClass("selected");
  $(this).addClass("selected");
  clearTimeout(auto_animation);
  // restart animation, delete this if you want animation to stop after user clicks on something
  auto_animation = begin_auto_animation();
});



});