"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }

function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _default(ToMix) {
  /**
   * Mix-in class to manage events associated with states.
   * @class EventedState
   */
  var EventedState = /*#__PURE__*/function (_ToMix) {
    _inherits(EventedState, _ToMix);

    var _super = _createSuper(EventedState);

    function EventedState() {
      _classCallCheck(this, EventedState);

      return _super.apply(this, arguments);
    }

    _createClass(EventedState, [{
      key: "_changeState",
      value: // eslint-disable-next-line jsdoc/check-param-names

      /**
       * The internal implementation for {@link EventedState#changeState `.changeState()`}, performing actual change in state.
       * @param {string} [state] The new state. Can be an omitted, which means toggling.
       * @param {Object} [detail]
       *   The object that should be put to event details that is fired before/after changing state.
       *   Can have a `group` property, which specifies what state to be changed.
       * @param {EventedState~changeStateCallback} callback The callback called once changing state is finished or is canceled.
       * @private
       */
      function _changeState() {
        throw new Error('_changeState() should be overriden to perform actual change in state.');
      } // eslint-disable-next-line jsdoc/check-param-names

      /**
       * Changes the state of this component.
       * @param {string} [state] The new state. Can be an omitted, which means toggling.
       * @param {Object} [detail]
       *   The object that should be put to event details that is fired before/after changing state.
       *   Can have a `group` property, which specifies what state to be changed.
       * @param {EventedState~changeStateCallback} [callback] The callback called once changing state is finished or is canceled.
       */

    }, {
      key: "changeState",
      value: function changeState() {
        var _this = this;

        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        var state = typeof args[0] === 'string' ? args.shift() : undefined;
        var detail = Object(args[0]) === args[0] && typeof args[0] !== 'function' ? args.shift() : undefined;
        var callback = typeof args[0] === 'function' ? args.shift() : undefined;

        if (typeof this.shouldStateBeChanged === 'function' && !this.shouldStateBeChanged(state, detail)) {
          if (callback) {
            callback(null, true);
          }

          return;
        }

        var data = {
          group: detail && detail.group,
          state: state
        };
        var eventNameSuffix = [data.group, state].filter(Boolean).join('-').split('-') // Group or state may contain hyphen
        .map(function (item) {
          return item[0].toUpperCase() + item.substr(1);
        }).join('');
        var eventStart = new CustomEvent(this.options["eventBefore".concat(eventNameSuffix)], {
          bubbles: true,
          cancelable: true,
          detail: detail
        });
        var fireOnNode = detail && detail.delegatorNode || this.element;
        var canceled = !fireOnNode.dispatchEvent(eventStart);

        if (canceled) {
          if (callback) {
            var error = new Error("Changing state (".concat(JSON.stringify(data), ") has been canceled."));
            error.canceled = true;
            callback(error);
          }
        } else {
          var changeStateArgs = [state, detail].filter(Boolean);

          this._changeState.apply(this, _toConsumableArray(changeStateArgs).concat([function () {
            fireOnNode.dispatchEvent(new CustomEvent(_this.options["eventAfter".concat(eventNameSuffix)], {
              bubbles: true,
              cancelable: true,
              detail: detail
            }));

            if (callback) {
              callback();
            }
          }]));
        }
      }
      /**
       * Tests if change in state should happen or not.
       * Classes inheriting {@link EventedState `EventedState`} should override this function.
       * @function EventedState#shouldStateBeChanged
       * @param {string} [state] The new state. Can be an omitted, which means toggling.
       * @param {Object} [detail]
       *   The object that should be put to event details that is fired before/after changing state.
       *   Can have a `group` property, which specifies what state to be changed.
       * @returns {boolean}
       *   `false` if change in state shouldn't happen, e.g. when the given new state is the same as the current one.
       */

    }]);

    return EventedState;
  }(ToMix);
  /**
   * The callback called once changing state is finished or is canceled.
   * @callback EventedState~changeStateCallback
   * @param {Error} error
   *   An error object with `true` in its `canceled` property if changing state is canceled.
   *   Cancellation happens if the handler of a custom event, that is fired before changing state happens,
   *   calls `.preventDefault()` against the event.
   * @param {boolean} keptState
   *   `true` if the call to {@link EventedState#changeState `.changeState()`} didn't cause actual change in state.
   */


  return EventedState;
}