/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const clickoutsideContext = '@@clickoutsideContext'

export default {
  bind (el, binding, vnode) {
    const documentHandler = function (e) {
      if (!vnode.context || el.contains(e.target)) {
        return false
      }
      if (binding.expression) {
        vnode.context[el[clickoutsideContext].methodName](e)
      } else {
        el[clickoutsideContext].bindingFn(e)
      }
    }
    el[clickoutsideContext] = {
      documentHandler,
      methodName: binding.expression,
      bindingFn: binding.value
    }
    setTimeout(() => {
      document.addEventListener('click', documentHandler)
    }, 0)
  },
  update (el, binding) {
    el[clickoutsideContext].methodName = binding.expression
    el[clickoutsideContext].bindingFn = binding.value
  },
  unbind (el) {
    document.removeEventListener('click', el[clickoutsideContext].documentHandler)
  }
}
