import React,{Component} from 'react';
import style from './index.less';
import config from "@config/index";
import {filterArr,isIE,getPageCoordinate,filterDataArr,preventDefault} from '@utils/tools.js';
import Notify from '../Notify/index.js';
import classNames from 'classnames';

import $ from 'jquery';
/*****
 * author:zn@2018-12-10
 * 自由文本输入组件
 * 接收参数：
 * value:默认显示文字
 * handleChange:输入变化时触发函数，接收以下参数：
 * * boxMark:病例项标识
 * * i:标签index
 * * text:标签内文字
 *
 * ****/

class EditableSpan extends Component{
  constructor(props){
    super(props);
    this.state={
      timer:null,
      clearTimer:null,
      oldText:props.value,
      labelVal:'',  //存放标签原有的值--主诉字数限制用
      preVal:'',
      index:null,
      searchPre:'',
    };
    this.$span = React.createRef();
    this.handleFocus = this.handleFocus.bind(this);
    this.onChange = this.onChange.bind(this);
    this.handleBlur = this.handleBlur.bind(this);
    this.handleKeydown = this.handleKeydown.bind(this);
    this.handleKeyup = this.handleKeyup.bind(this);
    this.moveEnd = this.moveEnd.bind(this);
    this.handleClick = this.handleClick.bind(this);
  }
  handleFocus(e){
    e.stopPropagation();
    const that = this;
    let txt = '';
    //黏贴时去掉html格式
    $(this.$span.current).on("paste",function(e){
      setTimeout(function(){
        txt = that.$span.current.innerText;
        that.$span.current.innerHTML = txt;
      });
    })
    const {mainSaveText,full,setFocusIndex,i,boxMark,value}= this.props;
    let mainText = filterDataArr(mainSaveText);//主诉字数
    if(+boxMark==3||+boxMark==4){         //主诉为空，且第一次聚焦其他史查体时提示且不可输入
      if(!mainText&&full&&(value===''||value===undefined)){
        Notify.error("无法操作，请先输入主诉");
        e.target.blur();
        return ;
      }
    }
    let text = e.target.innerText || e.target.innerHTML;
    setFocusIndex&&setFocusIndex({i,boxMark,dom:this.$span});
    this.setState({
      labelVal:text,
      index:i,
      searchPre:text
    });
  }
  onChange(e){
    e.stopPropagation();
    const {handleChange,boxMark,i,handleSearch,noSearch,mainSaveText,mainIds,handleClear} = this.props;
    const {labelVal,searchPre} = this.state;
    const text1 = e.target.innerText || e.target.innerHTML;
    // e.newValue IE浏览器DOMCharacterDataModified监听
    // const text1 = e.target.innerText || e.target.innerHTML || e.newValue;
    let mainText = filterDataArr(mainSaveText);//主诉字数
    if(+boxMark==1){
      if(mainText.length >= config.limited){
        if(text1.length > labelVal.length){
          e.target.innerText = labelVal;
          Notify.info(config.limitText);
          return
        }else if(text1.length == labelVal.length){
          this.setState({
            labelVal:text1
          });
        }else{
          handleChange&&handleChange({text1,boxMark,i});
        }
        return
      }
    }
    this.setState({
      labelVal:text1
    });

    const that = this;
    handleChange&&handleChange({text1,boxMark,i});
    if(noSearch){
      return;
    }
    //延迟搜索
    clearTimeout(this.state.timer);
    const timer = setTimeout(function(){
      let newText = e.target.innerText || e.target.innerHTML;
      let temp = '',isEnd=false;
      let search='';
      clearTimeout(that.state.timer);
      temp = newText.replace(searchPre,'');
      isEnd = !(newText.indexOf(searchPre)>0);
      search = temp.replace(config.regPreAndAft,'');
      if(!temp&&searchPre&&newText){
        search = searchPre;
      }
      if(config.punctuationReg.test(search)){    //只有标点符号时不搜索
        handleSearch&&handleSearch({text:search,isEnd,boxMark,mainIds});
      }else{//只有标点符号时要清空搜索结果
        handleClear && handleClear({boxMark})
      }
      //搜索后保持现在的值，继续输入时要用于对比
      /*that.setState({
        searchPre:newText
      });*/
    },config.delayTime);
    this.setState({
      timer
    });
  }

  handleBlur(e){//为了阻止冒泡事件
    e.stopPropagation();
    //解除绑定事件
    $(this.$span.current).off("paste");
  }

  moveEnd(obj) {
    if(window.getSelection){//ie11 10 9 ff safari
      obj.focus(); //解决ff不获取焦点无法定位问题
      var range = window.getSelection();//创建range
      range.selectAllChildren(obj);//range 选择obj下所有子内容
      range.collapseToEnd();//光标移至最后
    }
    else if (document.selection) {//ie10 9 8 7 6 5
      var range = document.selection.createRange();//创建选择对象
      range.moveToElementText(obj);//range定位到obj
      range.collapse(false);//光标移至最后
      range.select();
    }
  }

  handleKeydown(e){
    const ev = e||window.event;
    const {i} = this.props;
    const target = ev.target||ev.srcElement;
    let innerVal = target.innerText || target.innerHTML,ele,boxTop;
    //禁止回车事件
    if(ev.keyCode==13){return false;}
    //backspace事件 和delete
    if(ev.keyCode==8 || ev.keyCode==46){
      //用于对比backspace前后的值
      this.setState({
        preVal:innerVal
      })
    }
    let range = window.getSelection();
    let textIndex = range.focusOffset;
    let textLength = range.anchorNode.length;
    if(ev.keyCode==37&& i!=0){//向左
      let preObj = $(this.$span.current).prev();
      let obj = preObj[0]&&preObj[0].nodeName=="DIV"?preObj.prev():preObj;
      if(textIndex == 0){
        preventDefault(ev);
        if(obj){
          this.moveEnd(obj[0]);
        }
      }
    }
    if(ev.keyCode==39){//向右
      let nextObj = $(this.$span.current).next();
      let obj = nextObj[0]&&nextObj[0].nodeName=="DIV"?nextObj.next():nextObj;
      if(textIndex == textLength || textLength==undefined || (textIndex == 0 && textLength==1)){
        preventDefault(ev);
        if(obj){
          obj.focus();
        }
      }
    }
  }
  handleKeyup(e){
    const {boxMark,handleKeydown,removeId,handleClear,removeSpan} = this.props;
    const {preVal,index} = this.state;
    const ev = e||window.event;
    const target = ev.target||ev.srcElement;
    let innerVal = target.innerText || target.innerHTML,ele,boxTop;
    // 可编辑div不支持oninput事件，用此事件替代
    /*if(isIE() && innerVal != preVal){
      this.onChange(ev);
    }*/
    if(ev.keyCode==46){//delete
      //判断nexObj
      // let nextObj = $(this.$span.current).next();
      let nextObj = $(this.$span.current);
      if(preVal.trim().length==1&& !innerVal){
        removeId && removeId({boxMark,i:index,text:"",flag:'del'});
        handleClear && handleClear({boxMark});//删除最后一个字时清空搜索结果，避免现病史搜索框不立即消失的情况
        //如果后一个不是标签，则光标移到最前
        if(nextObj && nextObj[0].nodeName !=="DIV"){
          nextObj.focus();
        }
      }
      //action里往后删除
      if(innerVal == preVal){
        let data = innerVal.trim();
        if(nextObj && !config.punctuationReg.test(data) || data=='<br>'){
          handleKeydown&&handleKeydown({boxMark,i:index,text:data,flag:'del'});
          // nextObj.focus();  
          if(nextObj && nextObj[0] && nextObj[0].nodeName !=="DIV"){
            // IE浏览器focus光标在最后，其他浏览器在最前
            nextObj.focus();
          }
          /*this.setState({
            index: null
          })*/
        }
      }
    }

    if(ev.keyCode==8){
      // 主诉现病史去重：删除最后一个字的时候移除该数据（将name、id和value替换成空）并移除id
      // 前面是标签，内容为空时再删一次才移除标签；前面是文本，则直接移除；
      let preObj = $(this.$span.current).prev();
      if(index!==0&&preVal.trim().length==1&& !innerVal){
        removeId && removeId({boxMark,i:index,text:""});
        handleClear && handleClear({boxMark});//删除最后一个字时清空搜索结果，避免现病史搜索框不立即消失的情况
        if(preObj[0].nodeName !=="DIV"){
          this.moveEnd(preObj[0]);
        }
      }

      if(innerVal !== preVal){

      }else{
        // 中英文数字和下划线--单独删除标签
        /*const reg = new RegExp("([\u4E00-\uFA29]|[\uE7C7-\uE7F3]|[a-zA-Z0-9_])");
        if(index!==0 && reg.test(innerVal)){
          let obj = preObj[0].nodeName=="DIV"?preObj.prev():preObj;
          delSingleLable && delSingleLable({boxMark,i:index});
          this.moveEnd(obj[0]);
          this.setState({
            index: null
          })
        }*/
        let data = innerVal.trim();
        //判断是否为空、中英文：, 。、；,且不是第一位
        // let pattern = new RegExp(/^\,?$|^\，?$|^\.?$|^\。?$|^\、?$|^\;?$|^\；?$|^\:?$|^\：?$|\s/);
        // if(index!==0 && pattern.test(data)){
        // 后半段是处理IE
        if(index!==0 && !config.punctuationReg.test(data) || index!==0 && data=='<br>'){
          // let preObj = $(this.$span.current).prev();
          let obj = preObj[0].nodeName=="DIV"?preObj.prev():preObj;
          handleKeydown&&handleKeydown({boxMark,i:index,text:data,flag:'backsp'});
          this.moveEnd(obj[0]);
          this.setState({
            index: null
          })
        }
      }
      // 主诉使用模板删除最后一个空span时移除
      if(boxMark==1 && index==0 && !innerVal){
        removeSpan();
      }
    }

  }
  componentWillReceiveProps(next){
    const isRead = this.props.isRead;
    if(next.isRead != isRead){
      this.$span.current.innerText?(this.$span.current.innerText = next.value||''):(this.$span.current.innerHTML = next.value||'');
    }
  }
  handleClick(e){
    $(this.$span.current).attr({"contentEditable":true}).focus()
  }
  componentDidMount(){
    const {value} = this.props;
    if(value){
      this.$span.current.innerText?(this.$span.current.innerText = value||''):(this.$span.current.innerHTML = value||'');
    }
  }
  getClass(){
    const {full,value,saveText,i,preIsExt,afterIsExt} = this.props;
    const br = preIsExt&&!afterIsExt;       //最后一个体征标签
    const preSelected = saveText[i-1];
    const isFull = full?' '+style['full']:'';       //是否宽度设为整行宽度
    //有标点符号之外的字符或者前一个标签有选中值时，显示为黑色，否则查体中，有体征标记显示蓝色，否则灰显
    const ext = preIsExt?style['ext']:style['unselect'];
    const unselect = value.match(config.punctuationReg)||preSelected?'':ext;
    const hasBr = br?style['editable-br']:'';       //最后一个体征标签换行
    const $span = this.$span.current;
    if(br&&$span&&!$span.innerText){
      this.$span.current.innerHTML='&nbsp;';
    }
    return classNames(style['editable-span'],isFull,unselect,hasBr);
  }

  render() {
    return <span className={this.getClass()}
                 contentEditable='true'
                 ref={this.$span}
                 onInput={this.onChange}
                 onFocus={this.handleFocus}
                 onBlur={this.handleBlur}
                 onkeydown={this.handleKeydown}
                 onclick={this.handleClick}
                 onkeyup={this.handleKeyup}></span>;

  }
}

export default EditableSpan;