/*
   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: 500,
      autoHeightEaseFunction: "easeInOutExpo",
      autoSlide: false,
      autoSlideInterval: 7000,
      autoSlideStopWhenClicked: true,
      crossLinking: false,
      dynamicArrows: false,
      dynamicArrowLeftText: "&#171; left",
      dynamicArrowRightText: "right &#187;",
      dynamicTabs: false,
      dynamicTabsAlign: "center",
      dynamicTabsPosition: "bottom",
      externalTriggerSelector: "a.xtrig",
      firstPanelToLoad: 1,
      panelTitleSelector: "h2.title",
      slideEaseDuration: 500,
      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++;
      
   });
};