"use strict";

import $ from "jquery";
import Events from "../_events";

import FormBasics from "./_ui.form.basics";

const FormToggleUI = (($) => {
  // Constants
  const NAME = "jsFormToggleUI";
  const DATA_KEY = NAME;
  const W = window;
  const $Html = $("html, body");
  const FieldUI = "jsFormFieldUI";

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

      if (!ui.getCondition()) {
        console.warn(`${NAME}: no condition found`);
        return;
      }

      ui.toggle();

      ui.$el.on(`change shown.${FieldUI} hidden.${FieldUI}`, (e) => {
        ui.toggle();
      });

      ui.$el.addClass(`${NAME}-active`);
      ui.$el.data(DATA_KEY, ui);

      return ui;
    }

    getDataEl() {
      const ui = this;
      const $el = ui.$el;

      return $el.is('[type="radio"],[type="checkbox"]') &&
        $el.parents(".optionset,.checkboxset").length
        ? $el.parents(".optionset,.checkboxset")
        : $el;
    }

    getCondition() {
      const ui = this;

      return ui.getDataEl().data("value-toggle");
    }

    getCurrentVal() {
      const ui = this;
      const $el = ui.$el;

      if ($el.attr("type") === "checkbox") {
        if ($el.parents(".checkboxset").length && $el.is(":checked")) {
          return $el.val();
        }

        return $el.is(":checked") ? true : false;
      }

      if ($el.attr("type") === "radio") {
        return $Html.find(`[name="${$el.attr("name")}"]:checked`).val();
      }

      return $el.val();
    }

    getTrueTarget() {
      const ui = this;
      const $dataEl = ui.getDataEl();

      // compatibility params
      const target = $dataEl.data("value-toggle-yes");
      if (!target || !target.length) {
        return ui.getElement($dataEl.data("target"));
      }

      return ui.getElement(target);
    }

    getFalseTarget() {
      const ui = this;
      const $dataEl = ui.getDataEl();

      // compatibility params
      const target = $dataEl.data("value-toggle-no");
      if (!target || !target.length) {
        return ui.getElement($dataEl.data("value-toggle-false"));
      }

      return ui.getElement(target);
    }

    getElement(target) {
      return target && target.length && $(target).length ? $(target) : false;
    }

    toggle() {
      const ui = this;
      const $el = ui.$el;

      const val = ui.getCurrentVal();
      const $dataEl = ui.getDataEl();

      // conditional toggler
      const condition = ui.getCondition();
      if (!condition) {
        return;
      }

      // yes/no toggler
      const yesNoVal =
        (condition === true && val && val !== "" && val !== "0") ||
        condition === val
          ? true
          : false;

      const $yesTarget = ui.getTrueTarget();
      const $noTarget = ui.getFalseTarget();
      const elUI = $el.data(FieldUI);

      if ((elUI && !elUI.shown) || typeof val === "undefined") {
        ui.toggleElement($yesTarget, false);
        ui.toggleElement($noTarget, false);

        return;
      }

      if (yesNoVal) {
        ui.toggleElement($yesTarget, true);
        ui.toggleElement($noTarget, false);
      } else {
        ui.toggleElement($yesTarget, false);
        ui.toggleElement($noTarget, true);
      }
    }

    toggleElement($el, show) {
      if (!$el.length) {
        return;
      }

      const ui = this;
      const action = show ? "show" : "hide";

      $el.filter("div.collapse").each((i, el) => {
        const $el = $(el);

        $el.collapse(action);
      });

      $el.trigger(`${action}.${NAME}`);
    }

    dispose() {
      const ui = this;
      const $el = ui.$el;

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

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

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

    static validate() {
      return $(Events.FORM_FIELDS).each((i, el) => {
        const $el = $(el);
        const name = $el.attr("name");

        if ($(`[name="${name}"]`).length > 1) {
          console.warn(
            `${NAME}: Module malfunction duplicate "${name}" elements found`
          );
        }
      });
    }
  }

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

  // auto-apply
  $(W).on(`${Events.LODEDANDREADY}`, () => {
    //FormToggleUI.validate();
    $(Events.FORM_FIELDS).filter("[data-value-toggle]").jsFormToggleUI();

    $("[data-value-toggle]")
      .not(Events.FORM_FIELDS)
      .find(Events.FORM_FIELDS)
      .jsFormToggleUI();
  });

  return FormToggleUI;
})($);

export default FormToggleUI;