;(function ($, window, document, undefined) {
  'use strict';

  var noop = function() {};

  var Orbit = function(el, settings) {
    var self = this,
        container,
        slides_container = el,
        number_container,
        bullets_container,
        timer_container,
        idx = 0,
        animate,
        timer,
        locked = false,
        adjust_height_after = false;

    slides_container.children().first().addClass(settings.active_slide_class);

    self.update_slide_number = function(index) {
      if (settings.slide_number) {
        number_container.find('span:first').text(parseInt(index)+1);
        number_container.find('span:last').text(slides_container.children().length);
      }
      if (settings.bullets) {
        bullets_container.children().removeClass(settings.bullets_active_class);
        $(bullets_container.children().get(index)).addClass(settings.bullets_active_class);
      }
    };

    self.build_markup = function() {
      slides_container.wrap('<div class="'+settings.container_class+'"></div>');
      container = slides_container.parent();
      slides_container.addClass(settings.slides_container_class);
      
      if (settings.navigation_arrows) {
        container.append($('<a>').addClass(settings.prev_class).append('<span>'));
        container.append($('<a>').addClass(settings.next_class).append('<span>'));
      }

      if (settings.timer) {
        timer_container = $('<div>').addClass(settings.timer_container_class);
        timer_container.append('<span>');
        timer_container.append($('<div>').addClass(settings.timer_progress_class));
        timer_container.addClass(settings.timer_paused_class);
        container.append(timer_container);
      }

      if (settings.slide_number) {
        number_container = $('<div>').addClass(settings.slide_number_class);
        number_container.append('<span></span> of <span></span>');
        container.append(number_container);
      }

      if (settings.bullets) {
        bullets_container = $('<ol>').addClass(settings.bullets_container_class);
        container.append(bullets_container);
        slides_container.children().each(function(idx, el) {
          var bullet = $('<li>').attr('data-orbit-slide', idx);
          bullets_container.append(bullet);
        });
      }

      if (settings.stack_on_small) {
        container.addClass(settings.stack_on_small_class);
      }

      self.update_slide_number(0);
    };

    self._goto = function(next_idx, start_timer) {
      // if (locked) {return false;}
      if (next_idx === idx) {return false;}
      if (typeof timer === 'object') {timer.restart();}
      var slides = slides_container.children();

      var dir = 'next';
      locked = true;
      if (next_idx < idx) {dir = 'prev';}
      if (next_idx >= slides.length) {next_idx = 0;}
      else if (next_idx < 0) {next_idx = slides.length - 1;}
      
      var current = $(slides.get(idx));
      var next = $(slides.get(next_idx));

      current.css('zIndex', 2);
      next.css('zIndex', 4).addClass('active');

      slides_container.trigger('orbit:before-slide-change');
      settings.before_slide_change();
      
      var callback = function() {
        var unlock = function() {
          idx = next_idx;
          locked = false;
          if (start_timer === true) {timer = self.create_timer(); timer.start();}
          self.update_slide_number(idx);
          slides_container.trigger('orbit:after-slide-change',[{slide_number: idx, total_slides: slides.length}]);
          settings.after_slide_change(idx, slides.length);
        };
        if (slides_container.height() != next.height()) {
          slides_container.animate({'height': next.height()}, 250, 'linear', unlock);
        } else {
          unlock();
        }
      };

      if (slides.length === 1) {callback(); return false;}

      var start_animation = function() {
        if (dir === 'next') {animate.next(current, next, callback);}
        if (dir === 'prev') {animate.prev(current, next, callback);}        
      };

      if (next.height() > slides_container.height()) {
        slides_container.animate({'height': next.height()}, 250, 'linear', start_animation);
      } else {
        start_animation();
      }
    };
    
    self.next = function(e) {
      e.stopImmediatePropagation();
      e.preventDefault();
      self._goto(idx + 1);
    };
    
    self.prev = function(e) {
      e.stopImmediatePropagation();
      e.preventDefault();
      self._goto(idx - 1);
    };

    self.link_custom = function(e) {
      e.preventDefault();
      var link = $(this).attr('data-orbit-link');
      if ((typeof link === 'string') && (link = $.trim(link)) != "") {
        var slide = container.find('[data-orbit-slide='+link+']');
        if (slide.index() != -1) {self._goto(slide.index());}
      }
    };

    self.link_bullet = function(e) {
      var index = $(this).attr('data-orbit-slide');
      if ((typeof index === 'string') && (index = $.trim(index)) != "") {
        self._goto(index);
      }
    }

    self.timer_callback = function() {
      self._goto(idx + 1, true);
    }
    
    self.compute_dimensions = function() {
      var current = $(slides_container.children().get(idx));
      var h = current.height();
      if (!settings.variable_height) {
        slides_container.children().each(function(){
          if ($(this).height() > h) { h = $(this).height(); }
        });
      }
      slides_container.height(h);
    };

    self.create_timer = function() {
      var t = new Timer(
        container.find('.'+settings.timer_container_class), 
        settings, 
        self.timer_callback
      );
      return t;
    };

    self.stop_timer = function() {
      if (typeof timer === 'object') timer.stop();
    };

    self.toggle_timer = function() {
      var t = container.find('.'+settings.timer_container_class);
      if (t.hasClass(settings.timer_paused_class)) {
        if (typeof timer === 'undefined') {timer = self.create_timer();}
        timer.start();     
      }
      else {
        if (typeof timer === 'object') {timer.stop();}
      }
    };

    self.init = function() {
      self.build_markup();
      if (settings.timer) {timer = self.create_timer(); timer.start();}
      animate = new FadeAnimation(slides_container);
      if (settings.animation === 'slide') 
        animate = new SlideAnimation(slides_container);        
      container.on('click', '.'+settings.next_class, self.next);
      container.on('click', '.'+settings.prev_class, self.prev);
      container.on('click', self.toggle_timer);
      container.on('touchstart.fndtn.orbit', function(e) {
        if (!e.touches) {e = e.originalEvent;}
        var data = {
          start_page_x: e.touches[0].pageX,
          start_page_y: e.touches[0].pageY,
          start_time: (new Date()).getTime(),
          delta_x: 0,
          is_scrolling: undefined
        };
        container.data('swipe-transition', data);
        e.stopPropagation();
      })
      .on('touchmove.fndtn.orbit', function(e) {
        if (!e.touches) { e = e.originalEvent; }
        // Ignore pinch/zoom events
        if(e.touches.length > 1 || e.scale && e.scale !== 1) return;

        var data = container.data('swipe-transition');
        if (typeof data === 'undefined') {data = {};}

        data.delta_x = e.touches[0].pageX - data.start_page_x;

        if ( typeof data.is_scrolling === 'undefined') {
          data.is_scrolling = !!( data.is_scrolling || Math.abs(data.delta_x) < Math.abs(e.touches[0].pageY - data.start_page_y) );
        }

        if (!data.is_scrolling && !data.active) {
          e.preventDefault();
          var direction = (data.delta_x < 0) ? (idx+1) : (idx-1);
          data.active = true;
          self._goto(direction);
        }
      })
      .on('touchend.fndtn.orbit', function(e) {
        container.data('swipe-transition', {});
        e.stopPropagation();
      })
      .on('mouseenter.fndtn.orbit', function(e) {
        if (settings.timer && settings.pause_on_hover) {
          self.stop_timer();
        }
      })
      .on('mouseleave.fndtn.orbit', function(e) {
        if (settings.timer && settings.resume_on_mouseout) {
          timer.start();
        }
      });
      
      $(document).on('click', '[data-orbit-link]', self.link_custom);
      $(document).on('click', '[data-orbit-slide]', self.link_bullet)
      $(window).on('resize', self.compute_dimensions);
      $(window).on('load', self.compute_dimensions);
      slides_container.trigger('orbit:ready');
    };

    self.init();
  };

  var Timer = function(el, settings, callback) {
    var self = this,
        duration = settings.timer_speed,
        progress = el.find('.'+settings.timer_progress_class),
        start, 
        timeout,
        left = -1;

    this.update_progress = function(w) {
      var new_progress = progress.clone();
      new_progress.attr('style', '');
      new_progress.css('width', w+'%');
      progress.replaceWith(new_progress);
      progress = new_progress;
    };

    this.restart = function() {
      clearTimeout(timeout);
      el.addClass(settings.timer_paused_class);
      left = -1;
      self.update_progress(0);
    };

    this.start = function() {
      if (!el.hasClass(settings.timer_paused_class)) {return true;}
      left = (left === -1) ? duration : left;
      el.removeClass(settings.timer_paused_class);
      start = new Date().getTime();
      progress.animate({'width': '100%'}, left, 'linear');
      timeout = setTimeout(function() {
        self.restart();
        callback();
      }, left);
      el.trigger('orbit:timer-started')
    };

    this.stop = function() {
      if (el.hasClass(settings.timer_paused_class)) {return true;}
      clearTimeout(timeout);
      el.addClass(settings.timer_paused_class);
      var end = new Date().getTime();
      left = left - (end - start);
      var w = 100 - ((left / duration) * 100);
      self.update_progress(w);
      el.trigger('orbit:timer-stopped');
    };
  };
  
  var SlideAnimation = function(container) {
    var duration = 400;

    this.next = function(current, next, callback) {
      next.animate({'marginLeft': '0%'}, duration, 'linear', function() {
        current.css('marginLeft', '100%');
        callback();
      });
    };

    this.prev = function(current, prev, callback) {
      prev.css('marginLeft', '-100%');
      prev.animate({'marginLeft':'0%'}, duration, 'linear', function() {
        current.css('marginLeft', '100%');
        callback();
      });
    };
  };

  var FadeAnimation = function(container) {
    var duration = 250;

    this.next = function(current, next, callback) {
      next.css({'marginLeft':'0%', 'opacity':'0.01'});
      next.animate({'opacity':'1'}, duration, 'linear', function() {
        current.css('marginLeft', '100%');
        callback();
      });
    };

    this.prev = function(current, prev, callback) {
      prev.css({'marginLeft':'0%', 'opacity':'0.01'});
      prev.animate({'opacity':'1'}, duration, 'linear', function() {
        current.css('marginLeft', '100%');
        callback();
      });
    };
  };


  Foundation.libs = Foundation.libs || {};

  Foundation.libs.orbit = {
    name: 'orbit',

    version: '4.3.0',

    settings: {
      animation: 'slide',
      timer_speed: 10000,
      pause_on_hover: true,
      resume_on_mouseout: false,
      animation_speed: 500,
      stack_on_small: false,
      navigation_arrows: true,
      slide_number: true,
      container_class: 'orbit-container',
      stack_on_small_class: 'orbit-stack-on-small',
      next_class: 'orbit-next',
      prev_class: 'orbit-prev',
      timer_container_class: 'orbit-timer',
      timer_paused_class: 'paused',
      timer_progress_class: 'orbit-progress',
      slides_container_class: 'orbit-slides-container',
      bullets_container_class: 'orbit-bullets',
      bullets_active_class: 'active',
      slide_number_class: 'orbit-slide-number',
      caption_class: 'orbit-caption',
      active_slide_class: 'active',
      orbit_transition_class: 'orbit-transitioning',
      bullets: true,
      timer: true,
      variable_height: false,
      before_slide_change: noop,
      after_slide_change: noop
    },

    init: function (scope, method, options) {
      var self = this;
      Foundation.inherit(self, 'data_options');

      if (typeof method === 'object') {
        $.extend(true, self.settings, method);
      }

      if ($(scope).is('[data-orbit]')) {
        var $el = $(scope);
        var opts = self.data_options($el);
        new Orbit($el, $.extend({},self.settings, opts));
      }

      $('[data-orbit]', scope).each(function(idx, el) {
        var $el = $(el);
        var opts = self.data_options($el);
        new Orbit($el, $.extend({},self.settings, opts));
      });
    }
  };

    
}(Foundation.zj, this, this.document));