import Util from './util';

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0-alpha.6): tab.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

const Tab = ($ => {

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  const NAME = 'tab';
  const VERSION = '4.0.0-alpha.6';
  const DATA_KEY = 'bs.tab';
  const EVENT_KEY = `.${DATA_KEY}`;
  const DATA_API_KEY = '.data-api';
  const JQUERY_NO_CONFLICT = $.fn[NAME];
  const TRANSITION_DURATION = 150;

  const Event = {
    HIDE: `hide${EVENT_KEY}`,
    HIDDEN: `hidden${EVENT_KEY}`,
    SHOW: `show${EVENT_KEY}`,
    SHOWN: `shown${EVENT_KEY}`,
    CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`
  };

  const ClassName = {
    DROPDOWN_MENU: 'dropdown-menu',
    ACTIVE: 'active',
    DISABLED: 'disabled',
    FADE: 'fade',
    SHOW: 'show'
  };

  const Selector = {
    A: 'a',
    LI: 'li',
    DROPDOWN: '.dropdown',
    LIST: 'ul:not(.dropdown-menu), ol:not(.dropdown-menu), nav:not(.dropdown-menu)',
    FADE_CHILD: '> .nav-item .fade, > .fade',
    ACTIVE: '.active',
    ACTIVE_CHILD: '> .nav-item > .active, > .active',
    DATA_TOGGLE: '[data-toggle="tab"], [data-toggle="pill"]',
    DROPDOWN_TOGGLE: '.dropdown-toggle',
    DROPDOWN_ACTIVE_CHILD: '> .dropdown-menu .active'
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  class Tab {

    constructor(element) {
      this._element = element;
    }

    // getters

    static get VERSION() {
      return VERSION;
    }

    // public

    show() {
      if (this._element.parentNode && this._element.parentNode.nodeType === Node.ELEMENT_NODE && $(this._element).hasClass(ClassName.ACTIVE) || $(this._element).hasClass(ClassName.DISABLED)) {
        return;
      }

      let target;
      let previous;
      const listElement = $(this._element).closest(Selector.LIST)[0];
      const selector = Util.getSelectorFromElement(this._element);

      if (listElement) {
        previous = $.makeArray($(listElement).find(Selector.ACTIVE));
        previous = previous[previous.length - 1];
      }

      const hideEvent = $.Event(Event.HIDE, {
        relatedTarget: this._element
      });

      const showEvent = $.Event(Event.SHOW, {
        relatedTarget: previous
      });

      if (previous) {
        $(previous).trigger(hideEvent);
      }

      $(this._element).trigger(showEvent);

      if (showEvent.isDefaultPrevented() || hideEvent.isDefaultPrevented()) {
        return;
      }

      if (selector) {
        target = $(selector)[0];
      }

      this._activate(this._element, listElement);

      const complete = () => {
        const hiddenEvent = $.Event(Event.HIDDEN, {
          relatedTarget: this._element
        });

        const shownEvent = $.Event(Event.SHOWN, {
          relatedTarget: previous
        });

        $(previous).trigger(hiddenEvent);
        $(this._element).trigger(shownEvent);
      };

      if (target) {
        this._activate(target, target.parentNode, complete);
      } else {
        complete();
      }
    }

    dispose() {
      $.removeClass(this._element, DATA_KEY);
      this._element = null;
    }

    // private

    _activate(element, container, callback) {
      const active = $(container).find(Selector.ACTIVE_CHILD)[0];
      const isTransitioning = callback && Util.supportsTransitionEnd() && (active && $(active).hasClass(ClassName.FADE) || Boolean($(container).find(Selector.FADE_CHILD)[0]));

      const complete = () => this._transitionComplete(element, active, isTransitioning, callback);

      if (active && isTransitioning) {
        $(active).one(Util.TRANSITION_END, complete).emulateTransitionEnd(TRANSITION_DURATION);
      } else {
        complete();
      }

      if (active) {
        $(active).removeClass(ClassName.SHOW);
      }
    }

    _transitionComplete(element, active, isTransitioning, callback) {
      if (active) {
        $(active).removeClass(ClassName.ACTIVE);

        const dropdownChild = $(active.parentNode).find(Selector.DROPDOWN_ACTIVE_CHILD)[0];

        if (dropdownChild) {
          $(dropdownChild).removeClass(ClassName.ACTIVE);
        }

        active.setAttribute('aria-expanded', false);
      }

      $(element).addClass(ClassName.ACTIVE);
      element.setAttribute('aria-expanded', true);

      if (isTransitioning) {
        Util.reflow(element);
        $(element).addClass(ClassName.SHOW);
      } else {
        $(element).removeClass(ClassName.FADE);
      }

      if (element.parentNode && $(element.parentNode).hasClass(ClassName.DROPDOWN_MENU)) {

        const dropdownElement = $(element).closest(Selector.DROPDOWN)[0];
        if (dropdownElement) {
          $(dropdownElement).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE);
        }

        element.setAttribute('aria-expanded', true);
      }

      if (callback) {
        callback();
      }
    }

    // static

    static _jQueryInterface(config) {
      return this.each(function () {
        const $this = $(this);
        let data = $this.data(DATA_KEY);

        if (!data) {
          data = new Tab(this);
          $this.data(DATA_KEY, data);
        }

        if (typeof config === 'string') {
          if (data[config] === undefined) {
            throw new Error(`No method named "${config}"`);
          }
          data[config]();
        }
      });
    }

  }

  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */

  $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
    event.preventDefault();
    Tab._jQueryInterface.call($(this), 'show');
  });

  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

  $.fn[NAME] = Tab._jQueryInterface;
  $.fn[NAME].Constructor = Tab;
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return Tab._jQueryInterface;
  };

  return Tab;
})(jQuery);

export default Tab;
//# sourceMappingURL=tab.js.map