‘use strict’;

!function($) {

/**

* Orbit module.
* @module foundation.orbit
* @requires foundation.util.keyboard
* @requires foundation.util.motion
* @requires foundation.util.timerAndImageLoader
* @requires foundation.util.touch
*/

class Orbit {

/**
* Creates a new instance of an orbit carousel.
* @class
* @param {jQuery} element - jQuery object to make into an Orbit Carousel.
* @param {Object} options - Overrides to the default plugin settings.
*/
constructor(element, options){
  this.$element = element;
  this.options = $.extend({}, Orbit.defaults, this.$element.data(), options);

  this._init();

  Foundation.registerPlugin(this, 'Orbit');
  Foundation.Keyboard.register('Orbit', {
    'ltr': {
      'ARROW_RIGHT': 'next',
      'ARROW_LEFT': 'previous'
    },
    'rtl': {
      'ARROW_LEFT': 'next',
      'ARROW_RIGHT': 'previous'
    }
  });
}

/**
* Initializes the plugin by creating jQuery collections, setting attributes, and starting the animation.
* @function
* @private
*/
_init() {
  // @TODO: consider discussion on PR #9278 about DOM pollution by changeSlide
  this._reset();

  this.$wrapper = this.$element.find(`.${this.options.containerClass}`);
  this.$slides = this.$element.find(`.${this.options.slideClass}`);

  var $images = this.$element.find('img'),
      initActive = this.$slides.filter('.is-active'),
      id = this.$element[0].id || Foundation.GetYoDigits(6, 'orbit');

  this.$element.attr({
    'data-resize': id,
    'id': id
  });

  if (!initActive.length) {
    this.$slides.eq(0).addClass('is-active');
  }

  if (!this.options.useMUI) {
    this.$slides.addClass('no-motionui');
  }

  if ($images.length) {
    Foundation.onImagesLoaded($images, this._prepareForOrbit.bind(this));
  } else {
    this._prepareForOrbit();//hehe
  }

  if (this.options.bullets) {
    this._loadBullets();
  }

  this._events();

  if (this.options.autoPlay && this.$slides.length > 1) {
    this.geoSync();
  }

  if (this.options.accessible) { // allow wrapper to be focusable to enable arrow navigation
    this.$wrapper.attr('tabindex', 0);
  }
}

/**
* Creates a jQuery collection of bullets, if they are being used.
* @function
* @private
*/
_loadBullets() {
  this.$bullets = this.$element.find(`.${this.options.boxOfBullets}`).find('button');
}

/**
* Sets a `timer` object on the orbit, and starts the counter for the next slide.
* @function
*/
geoSync() {
  var _this = this;
  this.timer = new Foundation.Timer(
    this.$element,
    {
      duration: this.options.timerDelay,
      infinite: false
    },
    function() {
      _this.changeSlide(true);
    });
  this.timer.start();
}

/**
* Sets wrapper and slide heights for the orbit.
* @function
* @private
*/
_prepareForOrbit() {
  var _this = this;
  this._setWrapperHeight();
}

/**
* Calulates the height of each slide in the collection, and uses the tallest one for the wrapper height.
* @function
* @private
* @param {Function} cb - a callback function to fire when complete.
*/
_setWrapperHeight(cb) {//rewrite this to `for` loop
  var max = 0, temp, counter = 0, _this = this;

  this.$slides.each(function() {
    temp = this.getBoundingClientRect().height;
    $(this).attr('data-slide', counter);

    if (_this.$slides.filter('.is-active')[0] !== _this.$slides.eq(counter)[0]) {//if not the active slide, set css position and display property
      $(this).css({'position': 'relative', 'display': 'none'});
    }
    max = temp > max ? temp : max;
    counter++;
  });

  if (counter === this.$slides.length) {
    this.$wrapper.css({'height': max}); //only change the wrapper height property once.
    if(cb) {cb(max);} //fire callback with max height dimension.
  }
}

/**
* Sets the max-height of each slide.
* @function
* @private
*/
_setSlideHeight(height) {
  this.$slides.each(function() {
    $(this).css('max-height', height);
  });
}

/**
* Adds event listeners to basically everything within the element.
* @function
* @private
*/
_events() {
  var _this = this;

  //***************************************
  //**Now using custom event - thanks to:**
  //**      Yohai Ararat of Toronto      **
  //***************************************
  //
  this.$element.off('.resizeme.zf.trigger').on({
    'resizeme.zf.trigger': this._prepareForOrbit.bind(this)
  })
  if (this.$slides.length > 1) {

    if (this.options.swipe) {
      this.$slides.off('swipeleft.zf.orbit swiperight.zf.orbit')
      .on('swipeleft.zf.orbit', function(e){
        e.preventDefault();
        _this.changeSlide(true);
      }).on('swiperight.zf.orbit', function(e){
        e.preventDefault();
        _this.changeSlide(false);
      });
    }
    //***************************************

    if (this.options.autoPlay) {
      this.$slides.on('click.zf.orbit', function() {
        _this.$element.data('clickedOn', _this.$element.data('clickedOn') ? false : true);
        _this.timer[_this.$element.data('clickedOn') ? 'pause' : 'start']();
      });

      if (this.options.pauseOnHover) {
        this.$element.on('mouseenter.zf.orbit', function() {
          _this.timer.pause();
        }).on('mouseleave.zf.orbit', function() {
          if (!_this.$element.data('clickedOn')) {
            _this.timer.start();
          }
        });
      }
    }

    if (this.options.navButtons) {
      var $controls = this.$element.find(`.${this.options.nextClass}, .${this.options.prevClass}`);
      $controls.attr('tabindex', 0)
      //also need to handle enter/return and spacebar key presses
      .on('click.zf.orbit touchend.zf.orbit', function(e){
        e.preventDefault();
        _this.changeSlide($(this).hasClass(_this.options.nextClass));
      });
    }

    if (this.options.bullets) {
      this.$bullets.on('click.zf.orbit touchend.zf.orbit', function() {
        if (/is-active/g.test(this.className)) { return false; }//if this is active, kick out of function.
        var idx = $(this).data('slide'),
        ltr = idx > _this.$slides.filter('.is-active').data('slide'),
        $slide = _this.$slides.eq(idx);

        _this.changeSlide(ltr, $slide, idx);
      });
    }

    if (this.options.accessible) {
      this.$wrapper.add(this.$bullets).on('keydown.zf.orbit', function(e) {
        // handle keyboard event with keyboard util
        Foundation.Keyboard.handleKey(e, 'Orbit', {
          next: function() {
            _this.changeSlide(true);
          },
          previous: function() {
            _this.changeSlide(false);
          },
          handled: function() { // if bullet is focused, make sure focus moves
            if ($(e.target).is(_this.$bullets)) {
              _this.$bullets.filter('.is-active').focus();
            }
          }
        });
      });
    }
  }
}

/**
 * Resets Orbit so it can be reinitialized
 */
_reset() {
  // Don't do anything if there are no slides (first run)
  if (typeof this.$slides == 'undefined') {
    return;
  }

  if (this.$slides.length > 1) {
    // Remove old events
    this.$element.off('.zf.orbit').find('*').off('.zf.orbit')

    // Restart timer if autoPlay is enabled
    if (this.options.autoPlay) {
      this.timer.restart();
    }

    // Reset all sliddes
    this.$slides.each(function(el) {
      $(el).removeClass('is-active is-active is-in')
        .removeAttr('aria-live')
        .hide();
    });

    // Show the first slide
    this.$slides.first().addClass('is-active').show();

    // Triggers when the slide has finished animating
    this.$element.trigger('slidechange.zf.orbit', [this.$slides.first()]);

    // Select first bullet if bullets are present
    if (this.options.bullets) {
      this._updateBullets(0);
    }
  }
}

/**
* Changes the current slide to a new one.
* @function
* @param {Boolean} isLTR - flag if the slide should move left to right.
* @param {jQuery} chosenSlide - the jQuery element of the slide to show next, if one is selected.
* @param {Number} idx - the index of the new slide in its collection, if one chosen.
* @fires Orbit#slidechange
*/
changeSlide(isLTR, chosenSlide, idx) {
  if (!this.$slides) {return; } // Don't freak out if we're in the middle of cleanup
  var $curSlide = this.$slides.filter('.is-active').eq(0);

  if (/mui/g.test($curSlide[0].className)) { return false; } //if the slide is currently animating, kick out of the function

  var $firstSlide = this.$slides.first(),
  $lastSlide = this.$slides.last(),
  dirIn = isLTR ? 'Right' : 'Left',
  dirOut = isLTR ? 'Left' : 'Right',
  _this = this,
  $newSlide;

  if (!chosenSlide) { //most of the time, this will be auto played or clicked from the navButtons.
    $newSlide = isLTR ? //if wrapping enabled, check to see if there is a `next` or `prev` sibling, if not, select the first or last slide to fill in. if wrapping not enabled, attempt to select `next` or `prev`, if there's nothing there, the function will kick out on next step. CRAZY NESTED TERNARIES!!!!!
    (this.options.infiniteWrap ? $curSlide.next(`.${this.options.slideClass}`).length ? $curSlide.next(`.${this.options.slideClass}`) : $firstSlide : $curSlide.next(`.${this.options.slideClass}`))//pick next slide if moving left to right
    :
    (this.options.infiniteWrap ? $curSlide.prev(`.${this.options.slideClass}`).length ? $curSlide.prev(`.${this.options.slideClass}`) : $lastSlide : $curSlide.prev(`.${this.options.slideClass}`));//pick prev slide if moving right to left
  } else {
    $newSlide = chosenSlide;
  }

  if ($newSlide.length) {
    /**
    * Triggers before the next slide starts animating in and only if a next slide has been found.
    * @event Orbit#beforeslidechange
    */
    this.$element.trigger('beforeslidechange.zf.orbit', [$curSlide, $newSlide]);

    if (this.options.bullets) {
      idx = idx || this.$slides.index($newSlide); //grab index to update bullets
      this._updateBullets(idx);
    }

    if (this.options.useMUI && !this.$element.is(':hidden')) {
      Foundation.Motion.animateIn(
        $newSlide.addClass('is-active').css({'position': 'absolute', 'top': 0}),
        this.options[`animInFrom${dirIn}`],
        function(){
          $newSlide.css({'position': 'relative', 'display': 'block'})
          .attr('aria-live', 'polite');
      });

      Foundation.Motion.animateOut(
        $curSlide.removeClass('is-active'),
        this.options[`animOutTo${dirOut}`],
        function(){
          $curSlide.removeAttr('aria-live');
          if(_this.options.autoPlay && !_this.timer.isPaused){
            _this.timer.restart();
          }
          //do stuff?
        });
    } else {
      $curSlide.removeClass('is-active is-in').removeAttr('aria-live').hide();
      $newSlide.addClass('is-active is-in').attr('aria-live', 'polite').show();
      if (this.options.autoPlay && !this.timer.isPaused) {
        this.timer.restart();
      }
    }
  /**
  * Triggers when the slide has finished animating in.
  * @event Orbit#slidechange
  */
    this.$element.trigger('slidechange.zf.orbit', [$newSlide]);
  }
}

/**
* Updates the active state of the bullets, if displayed.
* @function
* @private
* @param {Number} idx - the index of the current slide.
*/
_updateBullets(idx) {
  var $oldBullet = this.$element.find(`.${this.options.boxOfBullets}`)
  .find('.is-active').removeClass('is-active').blur(),
  span = $oldBullet.find('span:last').detach(),
  $newBullet = this.$bullets.eq(idx).addClass('is-active').append(span);
}

/**
* Destroys the carousel and hides the element.
* @function
*/
destroy() {
  this.$element.off('.zf.orbit').find('*').off('.zf.orbit').end().hide();
  Foundation.unregisterPlugin(this);
}

}

Orbit.defaults = {

/**
* Tells the JS to look for and loadBullets.
* @option
 * @type {boolean}
* @default true
*/
bullets: true,
/**
* Tells the JS to apply event listeners to nav buttons
* @option
 * @type {boolean}
* @default true
*/
navButtons: true,
/**
* motion-ui animation class to apply
* @option
 * @type {string}
* @default 'slide-in-right'
*/
animInFromRight: 'slide-in-right',
/**
* motion-ui animation class to apply
* @option
 * @type {string}
* @default 'slide-out-right'
*/
animOutToRight: 'slide-out-right',
/**
* motion-ui animation class to apply
* @option
 * @type {string}
* @default 'slide-in-left'
*
*/
animInFromLeft: 'slide-in-left',
/**
* motion-ui animation class to apply
* @option
 * @type {string}
* @default 'slide-out-left'
*/
animOutToLeft: 'slide-out-left',
/**
* Allows Orbit to automatically animate on page load.
* @option
 * @type {boolean}
* @default true
*/
autoPlay: true,
/**
* Amount of time, in ms, between slide transitions
* @option
 * @type {number}
* @default 5000
*/
timerDelay: 5000,
/**
* Allows Orbit to infinitely loop through the slides
* @option
 * @type {boolean}
* @default true
*/
infiniteWrap: true,
/**
* Allows the Orbit slides to bind to swipe events for mobile, requires an additional util library
* @option
 * @type {boolean}
* @default true
*/
swipe: true,
/**
* Allows the timing function to pause animation on hover.
* @option
 * @type {boolean}
* @default true
*/
pauseOnHover: true,
/**
* Allows Orbit to bind keyboard events to the slider, to animate frames with arrow keys
* @option
 * @type {boolean}
* @default true
*/
accessible: true,
/**
* Class applied to the container of Orbit
* @option
 * @type {string}
* @default 'orbit-container'
*/
containerClass: 'orbit-container',
/**
* Class applied to individual slides.
* @option
 * @type {string}
* @default 'orbit-slide'
*/
slideClass: 'orbit-slide',
/**
* Class applied to the bullet container. You're welcome.
* @option
 * @type {string}
* @default 'orbit-bullets'
*/
boxOfBullets: 'orbit-bullets',
/**
* Class applied to the `next` navigation button.
* @option
 * @type {string}
* @default 'orbit-next'
*/
nextClass: 'orbit-next',
/**
* Class applied to the `previous` navigation button.
* @option
 * @type {string}
* @default 'orbit-previous'
*/
prevClass: 'orbit-previous',
/**
* Boolean to flag the js to use motion ui classes or not. Default to true for backwards compatability.
* @option
 * @type {boolean}
* @default true
*/
useMUI: true

};

// Window exports Foundation.plugin(Orbit, ‘Orbit’);

}(jQuery);