import React, { Component } from 'react';
import { DomHandler, ZIndexUtils, ConnectedOverlayScrollHandler, classNames, ObjectUtils } from 'primereact/utils';
import { CSSTransition } from 'primereact/csstransition';
import { OverlayService } from 'primereact/overlayservice';
import { Portal } from 'primereact/portal';
import PrimeReact from 'primereact/api';

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);
  Object.defineProperty(Constructor, "prototype", {
    writable: false
  });
  return Constructor;
}

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

  return self;
}

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

  return _setPrototypeOf(o, p);
}

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
    }
  });
  Object.defineProperty(subClass, "prototype", {
    writable: false
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _typeof(obj) {
  "@babel/helpers - typeof";

  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  }, _typeof(obj);
}

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

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

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 _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; } }
var Menu = /*#__PURE__*/function (_Component) {
  _inherits(Menu, _Component);

  var _super = _createSuper(Menu);

  function Menu(props) {
    var _this;

    _classCallCheck(this, Menu);

    _this = _super.call(this, props);
    _this.state = {
      visible: !props.popup
    };
    _this.onEnter = _this.onEnter.bind(_assertThisInitialized(_this));
    _this.onEntered = _this.onEntered.bind(_assertThisInitialized(_this));
    _this.onExit = _this.onExit.bind(_assertThisInitialized(_this));
    _this.onExited = _this.onExited.bind(_assertThisInitialized(_this));
    _this.onPanelClick = _this.onPanelClick.bind(_assertThisInitialized(_this));
    _this.menuRef = /*#__PURE__*/React.createRef();
    return _this;
  }

  _createClass(Menu, [{
    key: "onPanelClick",
    value: function onPanelClick(event) {
      if (this.props.popup) {
        OverlayService.emit('overlay-click', {
          originalEvent: event,
          target: this.target
        });
      }
    }
  }, {
    key: "onItemClick",
    value: function onItemClick(event, item) {
      if (item.disabled) {
        event.preventDefault();
        return;
      }

      if (!item.url) {
        event.preventDefault();
      }

      if (item.command) {
        item.command({
          originalEvent: event,
          item: item
        });
      }

      if (this.props.popup) {
        this.hide(event);
      }
    }
  }, {
    key: "onItemKeyDown",
    value: function onItemKeyDown(event, item) {
      var listItem = event.currentTarget.parentElement;

      switch (event.which) {
        //down
        case 40:
          var nextItem = this.findNextItem(listItem);

          if (nextItem) {
            nextItem.children[0].focus();
          }

          event.preventDefault();
          break;
        //up

        case 38:
          var prevItem = this.findPrevItem(listItem);

          if (prevItem) {
            prevItem.children[0].focus();
          }

          event.preventDefault();
          break;
      }
    }
  }, {
    key: "findNextItem",
    value: function findNextItem(item) {
      var nextItem = item.nextElementSibling;
      if (nextItem) return DomHandler.hasClass(nextItem, 'p-disabled') || !DomHandler.hasClass(nextItem, 'p-menuitem') ? this.findNextItem(nextItem) : nextItem;else return null;
    }
  }, {
    key: "findPrevItem",
    value: function findPrevItem(item) {
      var prevItem = item.previousElementSibling;
      if (prevItem) return DomHandler.hasClass(prevItem, 'p-disabled') || !DomHandler.hasClass(prevItem, 'p-menuitem') ? this.findPrevItem(prevItem) : prevItem;else return null;
    }
  }, {
    key: "toggle",
    value: function toggle(event) {
      if (this.props.popup) {
        if (this.state.visible) this.hide(event);else this.show(event);
      }
    }
  }, {
    key: "show",
    value: function show(event) {
      var _this2 = this;

      this.target = event.currentTarget;
      var currentEvent = event;
      this.setState({
        visible: true
      }, function () {
        if (_this2.props.onShow) {
          _this2.props.onShow(currentEvent);
        }
      });
    }
  }, {
    key: "hide",
    value: function hide(event) {
      var _this3 = this;

      var currentEvent = event;
      this.setState({
        visible: false
      }, function () {
        if (_this3.props.onHide) {
          _this3.props.onHide(currentEvent);
        }
      });
    }
  }, {
    key: "onEnter",
    value: function onEnter() {
      ZIndexUtils.set('menu', this.menuRef.current, PrimeReact.autoZIndex, this.props.baseZIndex || PrimeReact.zIndex['menu']);
      DomHandler.absolutePosition(this.menuRef.current, this.target);
    }
  }, {
    key: "onEntered",
    value: function onEntered() {
      this.bindDocumentListeners();
      this.bindScrollListener();
    }
  }, {
    key: "onExit",
    value: function onExit() {
      this.target = null;
      this.unbindDocumentListeners();
      this.unbindScrollListener();
    }
  }, {
    key: "onExited",
    value: function onExited() {
      ZIndexUtils.clear(this.menuRef.current);
    }
  }, {
    key: "bindDocumentListeners",
    value: function bindDocumentListeners() {
      var _this4 = this;

      if (!this.documentClickListener) {
        this.documentClickListener = function (event) {
          if (_this4.state.visible && _this4.isOutsideClicked(event)) {
            _this4.hide(event);
          }
        };

        document.addEventListener('click', this.documentClickListener);
      }

      if (!this.documentResizeListener) {
        this.documentResizeListener = function (event) {
          if (_this4.state.visible && !DomHandler.isTouchDevice()) {
            _this4.hide(event);
          }
        };

        window.addEventListener('resize', this.documentResizeListener);
      }
    }
  }, {
    key: "unbindDocumentListeners",
    value: function unbindDocumentListeners() {
      if (this.documentClickListener) {
        document.removeEventListener('click', this.documentClickListener);
        this.documentClickListener = null;
      }

      if (this.documentResizeListener) {
        window.removeEventListener('resize', this.documentResizeListener);
        this.documentResizeListener = null;
      }
    }
  }, {
    key: "bindScrollListener",
    value: function bindScrollListener() {
      var _this5 = this;

      if (!this.scrollHandler) {
        this.scrollHandler = new ConnectedOverlayScrollHandler(this.target, function (event) {
          if (_this5.state.visible) {
            _this5.hide(event);
          }
        });
      }

      this.scrollHandler.bindScrollListener();
    }
  }, {
    key: "unbindScrollListener",
    value: function unbindScrollListener() {
      if (this.scrollHandler) {
        this.scrollHandler.unbindScrollListener();
      }
    }
  }, {
    key: "isOutsideClicked",
    value: function isOutsideClicked(event) {
      return this.menuRef && this.menuRef.current && !(this.menuRef.current.isSameNode(event.target) || this.menuRef.current.contains(event.target));
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      this.unbindDocumentListeners();

      if (this.scrollHandler) {
        this.scrollHandler.destroy();
        this.scrollHandler = null;
      }

      ZIndexUtils.clear(this.menuRef.current);
    }
  }, {
    key: "renderSubmenu",
    value: function renderSubmenu(submenu, index) {
      var _this6 = this;

      var className = classNames('p-submenu-header', {
        'p-disabled': submenu.disabled
      }, submenu.className);
      var items = submenu.items.map(function (item, index) {
        return _this6.renderMenuitem(item, index);
      });
      return /*#__PURE__*/React.createElement(React.Fragment, {
        key: submenu.label + '_' + index
      }, /*#__PURE__*/React.createElement("li", {
        className: className,
        style: submenu.style,
        role: "presentation",
        "aria-disabled": submenu.disabled
      }, submenu.label), items);
    }
  }, {
    key: "renderSeparator",
    value: function renderSeparator(index) {
      return /*#__PURE__*/React.createElement("li", {
        key: 'separator_' + index,
        className: "p-menu-separator",
        role: "separator"
      });
    }
  }, {
    key: "renderMenuitem",
    value: function renderMenuitem(item, index) {
      var _this7 = this;

      var className = classNames('p-menuitem', item.className);
      var linkClassName = classNames('p-menuitem-link', {
        'p-disabled': item.disabled
      });
      var iconClassName = classNames('p-menuitem-icon', item.icon);
      var icon = item.icon && /*#__PURE__*/React.createElement("span", {
        className: iconClassName
      });
      var label = item.label && /*#__PURE__*/React.createElement("span", {
        className: "p-menuitem-text"
      }, item.label);
      var tabIndex = item.disabled ? null : 0;
      var content = /*#__PURE__*/React.createElement("a", {
        href: item.url || '#',
        className: linkClassName,
        role: "menuitem",
        target: item.target,
        onClick: function onClick(event) {
          return _this7.onItemClick(event, item);
        },
        onKeyDown: function onKeyDown(event) {
          return _this7.onItemKeyDown(event, item);
        },
        tabIndex: tabIndex,
        "aria-disabled": item.disabled
      }, icon, label);

      if (item.template) {
        var defaultContentOptions = {
          onClick: function onClick(event) {
            return _this7.onItemClick(event, item);
          },
          onKeyDown: function onKeyDown(event) {
            return _this7.onItemKeyDown(event, item);
          },
          className: linkClassName,
          tabIndex: tabIndex,
          labelClassName: 'p-menuitem-text',
          iconClassName: iconClassName,
          element: content,
          props: this.props
        };
        content = ObjectUtils.getJSXElement(item.template, item, defaultContentOptions);
      }

      return /*#__PURE__*/React.createElement("li", {
        key: item.label + '_' + index,
        className: className,
        style: item.style,
        role: "none"
      }, content);
    }
  }, {
    key: "renderItem",
    value: function renderItem(item, index) {
      if (item.separator) {
        return this.renderSeparator(index);
      } else {
        if (item.items) return this.renderSubmenu(item, index);else return this.renderMenuitem(item, index);
      }
    }
  }, {
    key: "renderMenu",
    value: function renderMenu() {
      var _this8 = this;

      return this.props.model.map(function (item, index) {
        return _this8.renderItem(item, index);
      });
    }
  }, {
    key: "renderElement",
    value: function renderElement() {
      if (this.props.model) {
        var className = classNames('p-menu p-component', this.props.className, {
          'p-menu-overlay': this.props.popup
        });
        var menuitems = this.renderMenu();
        return /*#__PURE__*/React.createElement(CSSTransition, {
          nodeRef: this.menuRef,
          classNames: "p-connected-overlay",
          "in": this.state.visible,
          timeout: {
            enter: 120,
            exit: 100
          },
          options: this.props.transitionOptions,
          unmountOnExit: true,
          onEnter: this.onEnter,
          onEntered: this.onEntered,
          onExit: this.onExit,
          onExited: this.onExited
        }, /*#__PURE__*/React.createElement("div", {
          ref: this.menuRef,
          id: this.props.id,
          className: className,
          style: this.props.style,
          onClick: this.onPanelClick
        }, /*#__PURE__*/React.createElement("ul", {
          className: "p-menu-list p-reset",
          role: "menu"
        }, menuitems)));
      }

      return null;
    }
  }, {
    key: "render",
    value: function render() {
      var element = this.renderElement();
      return this.props.popup ? /*#__PURE__*/React.createElement(Portal, {
        element: element,
        appendTo: this.props.appendTo
      }) : element;
    }
  }]);

  return Menu;
}(Component);

_defineProperty(Menu, "defaultProps", {
  id: null,
  model: null,
  popup: false,
  style: null,
  className: null,
  autoZIndex: true,
  baseZIndex: 0,
  appendTo: null,
  transitionOptions: null,
  onShow: null,
  onHide: null
});

export { Menu };