// Copyright Justin Norton 2011
//License
/*
<a rel="license" href="http://creativecommons.org/licenses/by-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nd/3.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/InteractiveResource" property="dct:title" rel="dct:type">JSlideshow</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="http://www.jnorton.co.uk/portfolio/digital-products/jslideshow" property="cc:attributionName" rel="cc:attributionURL">Justin Norton</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nd/3.0/">Creative Commons Attribution-NoDerivs 3.0 Unported License</a>.<br />Based on a work at <a xmlns:dct="http://purl.org/dc/terms/" href="http://www.jnorton.co.uk/portfolio/digital-products/jslideshow" rel="dct:source">www.jnorton.co.uk</a>.<br />Permissions beyond the scope of this license may be available at <a xmlns:cc="http://creativecommons.org/ns#" href="http://www.jnorton.co.uk/contact" rel="cc:morePermissions">http://www.jnorton.co.uk/contact</a>.
*/

// Modified for WMM to randomize slide order, 29 November 2011 - pjm

// Note added dependency on jquery.shuffle.js plugin.

(function($) {
  var currentslide = 1;
  var lastslide = 0;
  var firstload = 0;
  var count;
  var hoverelement;
  var interval_speed;
  var interval_id;
  var slidelist;
  var plugin = this;
  plugin.settings = {};
  var animations = {};
  
  var defaults = {
    interval: 3000,
    animationspeed: 1000,
    effectfirstslide: 0,
    effectType: 'core_fadein',
    easing: 'linear',
    parent: '.jslideshow',
    slides: '.jslides',
    tabs: '.jtabs',
    enabletabs: 1
  };
  var core_animations = {
    core_fadein: function() {
      this.fadeTo(plugin.settings.animationspeed, 1);
    },
    core_show: function() {
      this.show(plugin.settings.animationspeed, plugin.settings.easing);
    },
    core_slidedown: function() {
      this.slideDown(plugin.settings.animationspeed, plugin.settings.easing);
    }
  };
  var jqueryui_animations = {
    jqueryui_blind: function() {
      this.show("blind", { direction: "vertical" }, plugin.settings.animationspeed);
    },
    jqueryui_clip: function() {
      this.show("clip", { direction: "vertical" }, plugin.settings.animationspeed);
    },
    jqueryui_drop: function() {
      this.show("drop", { direction: "left" }, plugin.settings.animationspeed);
    },
    jqueryui_fade: function() {
      this.show("fade", {}, plugin.settings.animationspeed);
    },
    jqueryui_fold: function() {
      this.show("fold", {}, plugin.settings.animationspeed);
    },
    jqueryui_puff: function() {
         this.show("puff", {}, plugin.settings.animationspeed);
    },
    jqueryui_slide: function() {
      this.show("slide", { direction: "left" }, plugin.settings.animationspeed);
    }
  };
  var special_animations = {
    custom_animate_1: function() {
      //Special animation provided via JQuery UI easing http://jqueryui.com/demos/effect/easing.html
      this.animate( { opacity : "show", height: "toggle", width: "toggle" }, { duration: plugin.settings.animationspeed , specialEasing: { width: 'linear', height: 'easeOutBounce' }});
    }
  };
  
  var methods = {
    init: function(options) {
      return this.each(function() {
      if (typeof options === 'object') {
        plugin.settings = $.extend(defaults, options);
      }

      slidelist = $(plugin.settings.slides).shuffle().children();

      if (plugin.settings.enabletabs === 1) {
        count = $(plugin.settings.tabs + " li").size();
        hoverelement = $(plugin.settings.tabs + " li");
      } else {
        count = slidelist.size();
        hoverelement = slidelist;
      }
      
      interval_speed = plugin.settings.interval;

      //bind events 
      if(firstload === 0){
      $(this).jslideshow('bindEvents');
      firstload = 1;
      }
      slidelist.hide();
      if (plugin.settings.effectfirstslide === 0) {
        slidelist.first().show();
        currentslide = 2;
        if (plugin.settings.enabletabs === 1) {
          $(plugin.settings.tabs + ' li').first().addClass('active-tab');
        }
      } else {
        currentslide = 2;
        slidelist.first().jslideshow('doAnimation', $(plugin.settings.slides + ' li').first(), plugin.settings.effectType);
        if (plugin.settings.enabletabs === 1) {
          $(plugin.settings.tabs + ' li').first().addClass('active-tab');
        }
      }
      
      //go
      $(this).jslideshow('startShow', interval_speed);
      });
    },
    parentmouseenter: function(e){ 
      clearInterval(interval_id);
    },
    parentmouseleave: function(e){
      $(this).jslideshow('startShow', interval_speed);
    },
    tabmouseenter: function(e){
      clearInterval(interval_id);
      var index = $(this).index();
      if ((index + 1) === count) {
        lastslide = 1;
      } else {
        lastslide = 0;
      }
      currentslide = index + 2;
      if (plugin.settings.enabletabs === 1) {
        $(plugin.settings.tabs).children().removeClass('active-tab');
        $(this).addClass('active-tab');
      }
      $(plugin.settings.slides).children().hide();
      $(plugin.settings.slides + " li:nth-child(" + (index + 1) + ")").show();
      e.stopPropagation();
    },
    nextSlide: function() {
      var slides = slidelist;
      var activeTab = $(plugin.settings.tabs + " li:nth-child(" + (currentslide) + ")");
      var activeSlide = $(plugin.settings.slides + " li:nth-child(" + (currentslide) + ")");
      var previousSlide = $(plugin.settings.slides + " li:nth-child(" + (currentslide - 1) + ")");
      if (plugin.settings.enabletabs === 1) {
        $(plugin.settings.tabs).children().removeClass('active-tab');
      }
      $(slides).hide().css({
        'z-index': '1000'
      });
      if (lastslide === 1) {
        slides.first().queue('slideQ', function(next) {
          slides.last().css({
            'z-index': '999'
          });
          slides.last().show();
          $(this).jslideshow('doAnimation', $(this), plugin.settings.effectType);
          currentslide = 1;
          if (plugin.settings.enabletabs === 1) {
            $(plugin.settings.tabs + " li:nth-child(" + (currentslide) + ")").addClass('active-tab');
          }
          currentslide = 2;
          lastslide = 0;
          next();
        }).dequeue('slideQ');
      } else {
        activeSlide.queue('slideQ', function(next) {
          previousSlide.show();
          $(this).jslideshow('doAnimation', $(this), plugin.settings.effectType);
          if (plugin.settings.enabletabs === 1) {
            activeTab.addClass('active-tab');
          }
          currentslide++;
          next();
        }).dequeue('slideQ');
      }
      if (currentslide > count) {
        lastslide = 1;
      }
    },
    startShow: function(interval_speed) {
      interval_id = setInterval(function() {
        $(this).jslideshow('nextSlide');
      }, interval_speed);
    },  
    updateSlideshow: function(options){
      $(plugin.settings.tabs).children().removeClass('active-tab');
      clearInterval(interval_id);
      interval_id = 0;
      currentslide = 1;
      $(this).jslideshow('init', options);
    },
    doAnimation: function(element, effectType) {
      $.extend(element, animations, core_animations);
      $.extend(element, animations, jqueryui_animations);
      $.extend(element, animations, special_animations);
      element[effectType]();
    },
    bindEvents: function(){
      $(plugin.settings.parent).bind("mouseleave", methods.parentmouseleave)
                           .bind("mouseenter", methods.parentmouseenter);
                           
          if (plugin.settings.enabletabs === 1) {
            $(plugin.settings.tabs + " li").bind("mouseenter", methods.tabmouseenter);
          } 
    } 
  };
  
  $.fn.jslideshow = function(method) { 
  // Method calling logic 
    if (methods[method]) {
      return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
    } else if (typeof method === 'object' || !method) {
      return methods.init.apply(this, arguments);
    } else {
      $.error('Method ' + method + ' does not exist on jQuery.jslideshow');
    }
  };
  
})(jQuery);