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

const Button = ($ => {

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

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

  const ClassName = {
    ACTIVE: 'active',
    BUTTON: 'btn',
    FOCUS: 'focus'
  };

  const Selector = {
    DATA_TOGGLE_CARROT: '[data-toggle^="button"]',
    DATA_TOGGLE: '[data-toggle="buttons"]',
    INPUT: 'input',
    ACTIVE: '.active',
    BUTTON: '.btn'
  };

  const Event = {
    CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`,
    FOCUS_BLUR_DATA_API: `focus${EVENT_KEY}${DATA_API_KEY} ` + `blur${EVENT_KEY}${DATA_API_KEY}`
  };

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

  class Button {

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

    // getters

    static get VERSION() {
      return VERSION;
    }

    // public

    toggle() {
      let triggerChangeEvent = true;
      const rootElement = $(this._element).closest(Selector.DATA_TOGGLE)[0];

      if (rootElement) {
        const input = $(this._element).find(Selector.INPUT)[0];

        if (input) {
          if (input.type === 'radio') {
            if (input.checked && $(this._element).hasClass(ClassName.ACTIVE)) {
              triggerChangeEvent = false;
            } else {
              const activeElement = $(rootElement).find(Selector.ACTIVE)[0];

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

          if (triggerChangeEvent) {
            input.checked = !$(this._element).hasClass(ClassName.ACTIVE);
            $(input).trigger('change');
          }

          input.focus();
        }
      }

      this._element.setAttribute('aria-pressed', !$(this._element).hasClass(ClassName.ACTIVE));

      if (triggerChangeEvent) {
        $(this._element).toggleClass(ClassName.ACTIVE);
      }
    }

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

    // static

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

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

        if (config === 'toggle') {
          data[config]();
        }
      });
    }

  }

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

  $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE_CARROT, event => {
    event.preventDefault();

    let button = event.target;

    if (!$(button).hasClass(ClassName.BUTTON)) {
      button = $(button).closest(Selector.BUTTON);
    }

    Button._jQueryInterface.call($(button), 'toggle');
  }).on(Event.FOCUS_BLUR_DATA_API, Selector.DATA_TOGGLE_CARROT, event => {
    const button = $(event.target).closest(Selector.BUTTON)[0];
    $(button).toggleClass(ClassName.FOCUS, /^focus(in)?$/.test(event.type));
  });

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

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

  return Button;
})(jQuery);

export default Button;
//# sourceMappingURL=button.js.map