export function noop () {
}

export function getKeyFromChildrenIndex (child, menuEventKey, index) {
  const prefix = menuEventKey || ''
  return child.key === undefined ? `${prefix}item_${index}` : child.key
}

export function getMenuIdFromSubMenuEventKey (eventKey) {
  return `${eventKey}-menu-`
}

export function loopMenuItem (children, cb) {
  let index = -1
  children.forEach((c) => {
    index++
    if (c && c.type && c.type.isMenuItemGroup) {
      c.$slots.default.forEach((c2) => {
        index++
        c.componentOptions && cb(c2, index)
      })
    } else {
      c.componentOptions && cb(c, index)
    }
  })
}

export function loopMenuItemRecursively (children, keys, ret) {
  if (!children || ret.find) {
    return
  }
  children.forEach((c) => {
    if (ret.find) {
      return
    }
    if (c.data && c.data.slot && c.data.slot !== 'default') {
      return
    }
    if (c && c.componentOptions) {
      const options = c.componentOptions.Ctor.options
      if (!options || !(options.isSubMenu || options.isMenuItem || options.isMenuItemGroup)) {
        return
      }
      if (keys.indexOf(c.key) !== -1) {
        ret.find = true
      } else if (c.componentOptions.children) {
        loopMenuItemRecursively(c.componentOptions.children, keys, ret)
      }
    }
  })
}

export const menuAllProps = {
  props: [
    'defaultSelectedKeys',
    'selectedKeys',
    'defaultOpenKeys',
    'openKeys',
    'mode',
    'getPopupContainer',
    'openTransitionName',
    'openAnimation',
    'subMenuOpenDelay',
    'subMenuCloseDelay',
    'forceSubMenuRender',
    'triggerSubMenuAction',
    'level',
    'selectable',
    'multiple',
    'visible',
    'focusable',
    'defaultActiveFirst',
    'prefixCls',
    'inlineIndent',
    'parentMenu',
    'title',
    'rootPrefixCls',
    'eventKey',
    'active',
    'popupAlign',
    'popupOffset',
    'isOpen',
    'renderMenuItem',
    'manualRef',
    'subMenuKey',
    'disabled',
    'index',
    'isSelected',
    'store',
    'activeKey',
    'builtinPlacements',
    'overflowedIndicator',

    // the following keys found need to be removed from test regression
    'attribute',
    'value',
    'popupClassName',
    'inlineCollapsed',
    'menu',
    'theme',
    'itemIcon',
    'expandIcon',
  ],
  on: [
    'select',
    'deselect',
    'destroy',
    'openChange',
    'itemHover',
    'titleMouseenter',
    'titleMouseleave',
    'titleClick',
  ],
}

export const getWidth = (elem) => (
  elem &&
  typeof elem.getBoundingClientRect === 'function' &&
  elem.getBoundingClientRect().width
) || 0

export const setStyle = (elem, styleProperty, value) => {
  if (elem && typeof elem.style === 'object') {
    elem.style[styleProperty] = value
  }
}