// 引入拖拽js
import { startDrag } from './drag.js'
//引入抖动
import shake from './shake.js'
 
/**
 * 为el-dialog弹框增加拖拽功能
 * @param {*} el 指定dom
 * @param {*} binding 绑定对象
 * desc   只要用到了el-dialog的组件，都可以通过增加v-draggable属性变为可拖拽的弹框
 */
const draggable = (el, binding) => {
    // 绑定拖拽事件 [绑定拖拽触发元素为弹框头部、拖拽移动元素为整个弹框]
    startDrag(el.querySelector('.el-dialog__header'), el.querySelector('.el-dialog'), binding.value);
};
  /*
*  使用方法
*  将以下代码复制到一个drag.js文件中，然后在入口文件main.js中导入：import ‘./util/drog.js’；
*  给elementUI的dialog上加上 v-dialogDrag 指令就可以实现弹窗的全屏和拉伸了。
*  给dialog设置 :close-on-click-modal="false" , 禁止点击遮罩层关闭弹出层
*  如果是form表单，不要将提交等按钮放置el-form-item，以免在上下拉伸时被隐藏
*/
// v-dialogDrag: 弹窗拖拽+水平方向伸缩
const dialogDrag = {
  bind(el, binding, vnode, oldVnode) {
    // 弹框可拉伸最小宽高
    const minWidth = 400
    const minHeight = 300
    // 初始非全屏
    let isFullScreen = false
    // 当前顶部高度
    let nowMarginTop = 0
    // 获取弹框头部（这部分可双击全屏）
    const dialogHeaderEl = el.querySelector('.el-dialog__header')
    // 弹窗
    const dragDom = el.querySelector('.el-dialog')
    // 给弹窗加上overflow auto；不然缩小时框内的标签可能超出dialog；
    dragDom.style.overflow = 'auto'
    // 清除选择头部文字效果
    // dialogHeaderEl.onselectstart = new Function("return false");
    // 头部加上可拖动cursor
    dialogHeaderEl.style.cursor = 'move'
    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
    const moveDown = e => {
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - dialogHeaderEl.offsetLeft
      const disY = e.clientY - dialogHeaderEl.offsetTop
      // 获取到的值带px 正则匹配替换
      let styL, styT
      // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
      if (sty.left.includes('%')) {
        styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)
        styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
      } else {
        styL = +sty.left.replace(/\px/g, '')
        styT = +sty.top.replace(/\px/g, '')
      }
      document.onmousemove = function(e) {
        // 通过事件委托，计算移动的距离
        const l = e.clientX - disX
        const t = e.clientY - disY
        // 移动当前元素
        dragDom.style.left = `${l + styL}px`
        dragDom.style.top = `${t + styT}px`
        // 将此时的位置传出去
        // binding.value({x:e.pageX,y:e.pageY})
      }
      document.onmouseup = function(e) {
        document.onmousemove = null
        document.onmouseup = null
      }
    }
    dialogHeaderEl.onmousedown = moveDown
    // 当前宽高
    let nowWidth = 0
    // let nowHight = 0
    // 双击头部全屏效果
    dialogHeaderEl.ondblclick = e => {
      if (isFullScreen === false) {
        // nowHight = dragDom.clientHeight
        nowWidth = dragDom.clientWidth
        nowMarginTop = dragDom.style.marginTop
        dragDom.style.left = 0
        dragDom.style.top = 0
        dragDom.style.height = '100VH'
        dragDom.style.width = '100VW'
        dragDom.style.marginTop = 0
        isFullScreen = true
        dialogHeaderEl.style.cursor = 'initial'
        dialogHeaderEl.onmousedown = null
      } else {
        dragDom.style.height = 'auto'
        dragDom.style.width = nowWidth + 'px'
        dragDom.style.marginTop = nowMarginTop
        isFullScreen = false
        dialogHeaderEl.style.cursor = 'move'
        dialogHeaderEl.onmousedown = moveDown
      }
    }
    dragDom.onmousemove = function(e) {
      // let moveE = e
      if (
        e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10 ||
        dragDom.offsetLeft + 10 > e.clientX
      ) {
        dragDom.style.cursor = 'w-resize'
      } else if (
        el.scrollTop + e.clientY >
        dragDom.offsetTop + dragDom.clientHeight - 10
      ) {
        dragDom.style.cursor = 's-resize'
      } else {
        dragDom.style.cursor = 'default'

        dragDom.onmousedown = null
      }
      dragDom.onmousedown = e => {
        const clientX = e.clientX
        const clientY = e.clientY
        const elW = dragDom.clientWidth
        const elH = dragDom.clientHeight
        const EloffsetLeft = dragDom.offsetLeft
        const EloffsetTop = dragDom.offsetTop
        dragDom.style.userSelect = 'none'
        const ELscrollTop = el.scrollTop
        // 判断点击的位置是不是为头部
        if (
          clientX > EloffsetLeft &&
          clientX < EloffsetLeft + elW &&
          clientY > EloffsetTop &&
          clientY < EloffsetTop + 100
        ) {
          // 如果是头部在此就不做任何动作，以上有绑定dialogHeaderEl.onmousedown = moveDown;
        } else {
          document.onmousemove = function(e) {
            // 移动时禁用默认事件
            e.preventDefault()
            // 左侧鼠标拖拽位置
            if (clientX > EloffsetLeft && clientX < EloffsetLeft + 10) {
              // 往左拖拽
              if (clientX > e.clientX) {
                dragDom.style.width = elW + (clientX - e.clientX) * 2 + 'px'
              }
              // 往右拖拽
              if (clientX < e.clientX) {
                if (dragDom.clientWidth < minWidth) {
                  console.log()
                } else {
                  dragDom.style.width = elW - (e.clientX - clientX) * 2 + 'px'
                }
              }
            }
            // 右侧鼠标拖拽位置
            if (
              clientX > EloffsetLeft + elW - 10 &&
              clientX < EloffsetLeft + elW
            ) {
              // 往左拖拽
              if (clientX > e.clientX) {
                if (dragDom.clientWidth < minWidth) {
                  console.log()
                } else {
                  dragDom.style.width = elW - (clientX - e.clientX) * 2 + 'px'
                }
              }
              // 往右拖拽
              if (clientX < e.clientX) {
                dragDom.style.width = elW + (e.clientX - clientX) * 2 + 'px'
              }
            }
            // 底部鼠标拖拽位置
            if (
              ELscrollTop + clientY > EloffsetTop + elH - 20 &&
              ELscrollTop + clientY < EloffsetTop + elH
            ) {
              // 往上拖拽
              if (clientY > e.clientY) {
                if (dragDom.clientHeight < minHeight) {
                  console.log()
                } else {
                  dragDom.style.height = elH - (clientY - e.clientY) * 2 + 'px'
                }
              }
              // 往下拖拽
              if (clientY < e.clientY) {
                dragDom.style.height = elH + (e.clientY - clientY) * 2 + 'px'
              }
            }
          }
          // 拉伸结束
          document.onmouseup = function(e) {
            document.onmousemove = null

            document.onmouseup = null
          }
        }
      }
    }
  }
}

//下拉框懒加载
const SelectLazyLoading={
    inserted(el,binding){
        let SELECT_DOM = el.querySelector(".el-select-dropdown .el-select-dropdown__wrap") || el.querySelector('.el-autocomplete-suggestion__wrap') ;
            // console.log(SELECT_DOM)
            if(!SELECT_DOM){
                return false
            }
            SELECT_DOM.addEventListener("scroll", function () {
                // scrollHeight:当前所有选项的高度
              // scrollTop:滚动的距离
              // clientHeight:下拉框的高度
            //   console.log(SELECT_DOM,this.scrollHeight , this.scrollTop , this.clientHeight,this.scrollHeight - this.scrollTop - 1 <= this.clientHeight)
              let condition = this.scrollHeight - this.scrollTop - 1 <= this.clientHeight;
              if (condition) {
                binding.value();
              }
            });
    }
}
//块禁止样式
const disabled = (el,binding)=>{
    if(binding.value){
        // el.style.pointerEvents = 'none';
        // el.style.cursor='not-allowed';
        el.classList.add('pointerEvents')
        if(el.parentNode){
            // el.parentNode.style.cursor='not-allowed';
            // el.parentNode.style.pointerEvents='none';
            el.parentNode.classList.add('disabled')
        }
        el.style.color='#bbb'
    }else{
        // el.style.pointerEvents = '';
        // el.style.cursor='';
        el.classList.remove('pointerEvents')
        if(el.parentNode){
            el.parentNode.classList.remove('disabled')
            // el.parentNode.style.cursor='';
            // el.parentNode.style.pointerEvents='';
        }
        el.style.color=''
    }
}

//获取高度
const DivHeight={
    inserted(el,binding){
      if(el){
        let height = window.innerHeight
        binding.value(el.offsetHeight - 10)
        window.addEventListener('resize',()=>{
          let newHeight = window.innerHeight; 
          if (newHeight !== height) {  
            binding.value(el.offsetHeight - 10) 
            height = newHeight;
          }
          
        })
      }
    },
    unbind(el,binding){
      if(el){
        window.removeEventListener('resize',()=>{
          binding.value(el.offsetHeight - 10)
        })
      }
    },
}

//等高
const equal_heights = {
    inserted(el, binding,vnode) {  
        var that = vnode.context
        // 获取另一个容器的引用  
        const otherContainerSelector = binding.value;  
       
         that.$nextTick(()=>{
          const otherContainer = that.$refs[otherContainerSelector]; 
          if (!otherContainer) {  
            console.error('Unable to find the other container');  
            return;  
          }  
         
          window.addEventListener("resize",that.$commonJS.debounce(()=>{
            const children = el.children;  
            const otherChildren = otherContainer.children; 
            for (let i = 0; i < children.length && i < otherChildren.length; i++) {  
              children[i].style.height = 'auto';  
              otherChildren[i].style.height = 'auto'; 
              const maxHeight = Math.max(children[i].offsetHeight, otherChildren[i].offsetHeight);  
              children[i].style.height = maxHeight + 'px';  
              otherChildren[i].style.height = maxHeight + 'px';  
              otherChildren[i].style.background = '#f3f4f8';  
            } 
          },500))
          // 遍历当前容器和另一个容器的子div，并设置对应索引的高度  
          const children = el.children;  
          const otherChildren = otherContainer.children; 
          for (let i = 0; i < children.length && i < otherChildren.length; i++) {  
            const maxHeight = Math.max(children[i].offsetHeight, otherChildren[i].offsetHeight);  
            children[i].style.height = maxHeight + 'px';  
            otherChildren[i].style.height = maxHeight + 'px';  
            otherChildren[i].style.background = '#f3f4f8';  
          } 
        }) 
      },  
      // 如果需要，可以在更新时再次执行逻辑  
      componentUpdated(el, binding,vnode) {  
        // 这里可能需要额外的逻辑来处理更新后的高度同步  
        var that = vnode.context
        // 获取另一个容器的引用  
        const otherContainerSelector = binding.value;  
       
         that.$nextTick(()=>{
          const otherContainer = that.$refs[otherContainerSelector]; 
          if (!otherContainer) {  
            console.error('Unable to find the other container');  
            return;  
          }  
          // 遍历当前容器和另一个容器的子div，并设置对应索引的高度  
          const children = el.children;  
          const otherChildren = otherContainer.children; 
          for (let i = 0; i < children.length && i < otherChildren.length; i++) {  
            const maxHeight = Math.max(children[i].offsetHeight, otherChildren[i].offsetHeight);  
            children[i].style.height = maxHeight + 'px';  
            otherChildren[i].style.height = maxHeight + 'px';  
            otherChildren[i].style.background = '#f3f4f8';  
          } 
        }) 
      },  
      unbind(el) {
        var eventListener = window.eventListeners_
        if(!eventListener){
          return false
        }
        const listeners = eventListener.resize
        if(listeners){
          window.removeEventListener("resize");
        }
        
      },
}

import elTableInfiniteScroll from './tableInfiniteScroll.js'

const directives = {
    draggable,
    SelectLazyLoading,
    disabled,
    DivHeight, 
    equal_heights,
    shake,
    dialogDrag,
    elTableInfiniteScroll
};
// 这种写法可以批量注册指令
export default {
  install(Vue) {
      Object.keys(directives).forEach((key) => {
      Vue.directive(key, directives[key]);
    });
  },
};