/*
     jQuery Coda-Slider v2.0 - http://www.ndoherty.biz/coda-slider
     Copyright (c) 2009 Niall Doherty
     This plugin available for use in all personal or commercial projects under both MIT and GPL licenses.
*/

$(function(){
     // Remove the coda-slider-no-js class from the body
     $("body").removeClass("coda-slider-no-js");
     // Preloader
     $(".coda-slider").children('.panel').hide().end().prepend('<p class="loading">Loading...<br /><img src="images/ajax-loader.gif" alt="loading..." /></p>');
});

var sliderCount = 1;

$.fn.codaSlider = function(settings) {

     settings = $.extend({
          autoHeight: false,
          autoHeightEaseDuration: 1000,
          autoHeightEaseFunction: "easeInOutExpo",
          autoSlide: false,
          autoSlideInterval: 7000,
          autoSlideStopWhenClicked: true,
          crossLinking: true,
          dynamicArrows: true,
          dynamicArrowLeftText: "<span class=\"back\">",
          dynamicArrowRightText: "<span class=\"fwd\">",
          dynamicTabs: true,
          dynamicTabsAlign: "left",
          dynamicTabsPosition: "top",
          externalTriggerSelector: "a.xtrig",
          firstPanelToLoad: 1,
          panelTitleSelector: "span.page",
          slideEaseDuration: 1000,
          slideEaseFunction: "easeInOutExpo"
     }, settings);

     return this.each(function(){

          // Uncomment the line below to test your preloader
          // alert("Testing preloader");

          var slider = $(this);

          // If we need arrows
          if (settings.dynamicArrows) {
               slider.parent().addClass("arrows");
               slider.before('<div class="coda-nav-left" id="coda-nav-left-' + sliderCount + '"><a href="#">' + settings.dynamicArrowLeftText + '</a></div>');
               slider.after('<div class="coda-nav-right" id="coda-nav-right-' + sliderCount + '"><a href="#">' + settings.dynamicArrowRightText + '</a></div>');
          };

          var panelWidth = slider.find(".panel").width();
          var panelCount = slider.find(".panel").size();
          var panelContainerWidth = panelWidth*panelCount;
          var navClicks = 0; // Used if autoSlideStopWhenClicked = true

          // Surround the collection of panel divs with a container div (wide enough for all panels to be lined up end-to-end)
          $('.panel', slider).wrapAll('<div class="panel-container"></div>');
          // Specify the width of the container div (wide enough for all panels to be lined up end-to-end)
          $(".panel-container", slider).css({ width: panelContainerWidth });

          // Specify the current panel.
          // If the loaded URL has a hash (cross-linking), we're going to use that hash to give the slider a specific starting position...
          if (settings.crossLinking && location.hash && parseInt(location.hash.slice(1)) <= panelCount) {
               var currentPanel = parseInt(location.hash.slice(1));
               var offset = - (panelWidth*(currentPanel - 1));
               $('.panel-container', slider).css({ marginLeft: offset });
          // If that's not the case, check to see if we're supposed to load a panel other than Panel 1 initially...
          } else if (settings.firstPanelToLoad != 1 && settings.firstPanelToLoad <= panelCount) {
               var currentPanel = settings.firstPanelToLoad;
               var offset = - (panelWidth*(currentPanel - 1));
               $('.panel-container', slider).css({ marginLeft: offset });
          // Otherwise, we'll just set the current panel to 1...
          } else {
               var currentPanel = 1;
          };

          // Left arrow click
          $("#coda-nav-left-" + sliderCount + " a").click(function(){
               navClicks++;
               if (currentPanel == 1) {
                    offset = - (panelWidth*(panelCount - 1));
                    alterPanelHeight(panelCount - 1);
                    currentPanel = panelCount;
                    slider.siblings('.coda-nav').find('a.current').removeClass('current').parents('ul').find('li:last a').addClass('current');
               } else {
                    currentPanel -= 1;
                    alterPanelHeight(currentPanel - 1);
                    offset = - (panelWidth*(currentPanel - 1));
                    slider.siblings('.coda-nav').find('a.current').removeClass('current').parent().prev().find('a').addClass('current');
               };
               $('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
               if (settings.crossLinking) { location.hash = currentPanel }; // Change the URL hash (cross-linking)
               return false;
          });

          // Right arrow click
          $('#coda-nav-right-' + sliderCount + ' a').click(function(){
               navClicks++;
               if (currentPanel == panelCount) {
                    offset = 0;
                    currentPanel = 1;
                    alterPanelHeight(0);
                    slider.siblings('.coda-nav').find('a.current').removeClass('current').parents('ul').find('a:eq(0)').addClass('current');
               } else {
                    offset = - (panelWidth*currentPanel);
                    alterPanelHeight(currentPanel);
                    currentPanel += 1;
                    slider.siblings('.coda-nav').find('a.current').removeClass('current').parent().next().find('a').addClass('current');
               };
               $('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
               if (settings.crossLinking) { location.hash = currentPanel }; // Change the URL hash (cross-linking)
               return false;
          });

          // If we need a dynamic menu
          if (settings.dynamicTabs) {
               var dynamicTabs = '<div class="coda-nav" id="coda-nav-' + sliderCount + '"><ul></ul></div>';
               switch (settings.dynamicTabsPosition) {
                    case "bottom":
                         slider.parent().append(dynamicTabs);
                         break;
                    default:
                         slider.parent().prepend(dynamicTabs);
                         break;
               };
               ul = $('#coda-nav-' + sliderCount + ' ul');
               // Create the nav items
               $('.panel', slider).each(function(n) {
                    ul.append('<li class="tab' + (n+1) + '"><a href="#' + (n+1) + '">' + $(this).find(settings.panelTitleSelector).text() + '</a></li>');
               });
               navContainerWidth = slider.width() + slider.siblings('.coda-nav-left').width() + slider.siblings('.coda-nav-right').width();
               ul.parent().css({ width: navContainerWidth });
               switch (settings.dynamicTabsAlign) {
                    case "center":
                         ul.css({ width: ($("li", ul).width() + 2) * panelCount });
                         break;
                    case "right":
                         ul.css({ float: 'right' });
                         break;
               };
          };

          // If we need a tabbed nav
          $('#coda-nav-' + sliderCount + ' a').each(function(z) {
               // What happens when a nav link is clicked
               $(this).bind("click", function() {
                    navClicks++;
                    $(this).addClass('current').parents('ul').find('a').not($(this)).removeClass('current');
                    offset = - (panelWidth*z);
                    alterPanelHeight(z);
                    currentPanel = z + 1;
                    $('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                    if (!settings.crossLinking) { return false }; // Don't change the URL hash unless cross-linking is specified
               });
          });

          // External triggers (anywhere on the page)
          $(settings.externalTriggerSelector).each(function() {
               // Make sure this only affects the targeted slider
               if (sliderCount == parseInt($(this).attr("rel").slice(12))) {
                    $(this).bind("click", function() {
                         navClicks++;
                         targetPanel = parseInt($(this).attr("href").slice(1));
                         offset = - (panelWidth*(targetPanel - 1));
                         alterPanelHeight(targetPanel - 1);
                         currentPanel = targetPanel;
                         // Switch the current tab:
                         slider.siblings('.coda-nav').find('a').removeClass('current').parents('ul').find('li:eq(' + (targetPanel - 1) + ') a').addClass('current');
                         // Slide
                         $('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                         if (!settings.crossLinking) { return false }; // Don't change the URL hash unless cross-linking is specified
                    });
               };
          });

          // Specify which tab is initially set to "current". Depends on if the loaded URL had a hash or not (cross-linking).
          if (settings.crossLinking && location.hash && parseInt(location.hash.slice(1)) <= panelCount) {
               $("#coda-nav-" + sliderCount + " a:eq(" + (location.hash.slice(1) - 1) + ")").addClass("current");
          // If there's no cross-linking, check to see if we're supposed to load a panel other than Panel 1 initially...
          } else if (settings.firstPanelToLoad != 1 && settings.firstPanelToLoad <= panelCount) {
               $("#coda-nav-" + sliderCount + " a:eq(" + (settings.firstPanelToLoad - 1) + ")").addClass("current");
          // Otherwise we must be loading Panel 1, so make the first tab the current one.
          } else {
               $("#coda-nav-" + sliderCount + " a:eq(0)").addClass("current");
          };

          // Set the height of the first panel
          if (settings.autoHeight) {
               panelHeight = $('.panel:eq(' + (currentPanel - 1) + ')', slider).height();
               slider.css({ height: panelHeight });
          };

          // Trigger autoSlide
          if (settings.autoSlide) {
               slider.ready(function() {
                    setTimeout(autoSlide,settings.autoSlideInterval);
               });
          };

          function alterPanelHeight(x) {
               if (settings.autoHeight) {
                    panelHeight = $('.panel:eq(' + x + ')', slider).height()
                    slider.animate({ height: panelHeight }, settings.autoHeightEaseDuration, settings.autoHeightEaseFunction);
               };
          };

          function autoSlide() {
               if (navClicks == 0 || !settings.autoSlideStopWhenClicked) {
                    if (currentPanel == panelCount) {
                         var offset = 0;
                         currentPanel = 1;
                    } else {
                         var offset = - (panelWidth*currentPanel);
                         currentPanel += 1;
                    };
                    alterPanelHeight(currentPanel - 1);
                    // Switch the current tab:
                    slider.siblings('.coda-nav').find('a').removeClass('current').parents('ul').find('li:eq(' + (currentPanel - 1) + ') a').addClass('current');
                    // Slide:
                    $('.panel-container', slider).animate({ marginLeft: offset }, settings.slideEaseDuration, settings.slideEaseFunction);
                    setTimeout(autoSlide,settings.autoSlideInterval);
               };
          };

          // Kill the preloader
          $('.panel', slider).show().end().find("p.loading").remove();
          slider.removeClass("preload");

          sliderCount++;

     });
};