(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "../../globals/js/misc/mixin", "../../globals/js/mixins/create-component", "../../globals/js/mixins/init-component-by-search", "../../globals/js/mixins/handles", "../../globals/js/misc/on", "../../globals/js/settings"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("../../globals/js/misc/mixin"), require("../../globals/js/mixins/create-component"), require("../../globals/js/mixins/init-component-by-search"), require("../../globals/js/mixins/handles"), require("../../globals/js/misc/on"), require("../../globals/js/settings"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.mixin, global.createComponent, global.initComponentBySearch, global.handles, global.on, global.settings);
    global.headerNav = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _mixin2, _createComponent, _initComponentBySearch, _handles, _on, _settings) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports.default = void 0;
  _mixin2 = _interopRequireDefault(_mixin2);
  _createComponent = _interopRequireDefault(_createComponent);
  _initComponentBySearch = _interopRequireDefault(_initComponentBySearch);
  _handles = _interopRequireDefault(_handles);
  _on = _interopRequireDefault(_on);
  _settings = _interopRequireDefault(_settings);

  function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
      default: obj
    };
  }

  function _typeof(obj) {
    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);
  }

  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 _possibleConstructorReturn(self, call) {
    if (call && (_typeof(call) === "object" || typeof call === "function")) {
      return call;
    }

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

  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);
  }

  var toArray = function toArray(arrayLike) {
    return Array.prototype.slice.call(arrayLike);
  };

  var HeaderNav =
  /*#__PURE__*/
  function (_mixin) {
    _inherits(HeaderNav, _mixin);

    function HeaderNav(element, options) {
      var _this;

      _classCallCheck(this, HeaderNav);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(HeaderNav).call(this, element, options));

      _this.getCurrentNavigation = function () {
        var focused = _this.element.ownerDocument.activeElement.closest(_this.options.selectorSubmenu);

        return focused && focused.nodeType === Node.ELEMENT_NODE ? focused.querySelector(_this.options.selectorSubmenuLink) : null;
      };

      _this.navigate = function (direction) {
        var items = toArray(_this.element.querySelectorAll(_this.options.selectorSubmenuLink));

        var start = _this.getCurrentNavigation();

        var getNextItem = function getNextItem(old) {
          var handleUnderflow = function handleUnderflow(index, length) {
            return index + (index >= 0 ? 0 : length);
          };

          var handleOverflow = function handleOverflow(index, length) {
            return index - (index < length ? 0 : length);
          }; // `items.indexOf(old)` may be -1 (Scenario of no previous focus)


          var index = Math.max(items.indexOf(old) + direction, -1);
          return items[handleUnderflow(handleOverflow(index, items.length), items.length)];
        };

        getNextItem(start).focus();
      };

      _this._handleKeyDown = function (event) {
        var keyCodes = {
          37: _this.constructor.NAVIGATE.BACKWARD,
          // left arrow
          39: _this.constructor.NAVIGATE.FORWARD // right arrow

        };
        var keyCodeMatches = keyCodes[event.which];

        if (keyCodeMatches) {
          _this.navigate(keyCodeMatches);
        }
      };

      _this.manage((0, _on.default)(_this.element, 'keydown', _this._handleKeyDown));

      return _this;
    }
    /**
     * The map associating DOM element and Header instance.
     * @member HeaderNav.components
     * @type {WeakMap}
     */


    _createClass(HeaderNav, null, [{
      key: "options",

      /**
       * The component options.
       * If `options` is specified in the constructor,
       * {@linkcode HeaderNav.create .create()}, or
       * {@linkcode HeaderNav.init .init()},
       * properties in this object are overriden for the instance being create and
       * how {@linkcode HeaderNav.init .init()} works.
       * @member HeaderNav.options
       * @type {object}
       * @property {string} selectorInit The data attribute to find side navs.
       */
      get: function get() {
        var prefix = _settings.default.prefix;
        return {
          selectorInit: '[data-header-nav]',
          selectorNavKind: '[data-header-nav-kind]',
          selectorSubmenu: ".".concat(prefix, "--header__submenu"),
          selectorSubmenuLink: ".".concat(prefix, "--header__menu-title"),
          selectorSubmenuItem: ".".concat(prefix, "--header__menu-title > .").concat(prefix, "--header__menu-item")
        };
      }
      /**
       * Enum for navigating backward/forward.
       * @readonly
       * @member Header.NAVIGATE
       * @type {object}
       * @property {number} BACKWARD Navigating backward.
       * @property {number} FORWARD Navigating forward.
       */

    }]);

    HeaderNav.components = new WeakMap();
    HeaderNav.NAVIGATE = {
      BACKWARD: -1,
      FORWARD: 1
    };
    return HeaderNav;
  }((0, _mixin2.default)(_createComponent.default, _initComponentBySearch.default, _handles.default));

  _exports.default = HeaderNav;
});