'use strict';

import $ from 'jquery';

import select2 from 'select2/dist/js/select2.js';
import Events from '../_events';

const FormSelect2 = (($) => {
  // Constants
  const NAME = 'jsFormSelect2';
  const DATA_KEY = NAME;
  const $Html = $('html, body');
  const W = window;
  const D = document;

  class FormSelect2 {
    constructor(el) {
      const ui = this;
      const $el = $(el);

      ui._el = el;
      ui.dispose();

      console.log(`${NAME}: init`);
      $el.data(DATA_KEY, this);

      const $fields = $el.find(Events.FORM_FIELDS);

      const $selectFields = $el
        .find('select:not([readonly])')
        .not('.no-select2');

      $selectFields.each((i, el) => {
        $(el).select2();
      });

      $el.addClass(`${NAME}-active`);
      $el.trigger(Events.FORM_INIT_BASICS);
    }

    // Public methods
    dispose() {
      console.log(`${NAME}: dispose`);
      const ui = this;

      const $el = $(ui._el);

      const $selectFields = $el
        .find('select:not([readonly])')
        .not('.no-select2');
      $selectFields.each((i, el) => {
        const $el = $(el);
        if ($el.hasClass('select2-hidden-accessible')) {
          $el.select2('destroy');
        }
      });

      $.removeData(ui._el, DATA_KEY);
      ui._el = null;
      $el.removeClass(`${NAME}-active`);
    }

    static _jQueryInterface() {
      return this.each(() => {
        // attach functionality to el
        const $el = $(this);
        let data = $el.data(DATA_KEY);

        if (!data) {
          data = new FormSelect2(this);
          $el.data(DATA_KEY, data);
        }
      });
    }
  }

  // jQuery interface
  $.fn[NAME] = FormSelect2._jQueryInterface;
  $.fn[NAME].Constructor = FormSelect2;
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return FormSelect2._jQueryInterface;
  };

  const init = () => {
    $('form').jsFormSelect2();
  };

  // auto-apply
  $(W).on(`${NAME}.init ${Events.AJAX} ${Events.LOADED}`, () => {
    init();
  });

  return FormSelect2;
})($);

export default FormSelect2;