var fs = require('fs');
var path=require('path');

var dir= "E:/exam"; //path.dirname("D:/0228/");
console.log(dir);
var state =fs.lstatSync(dir)
if(!state.isDirectory())
{
    console.log("請輸入目錄")
}

var dirNameList=[];
var fileList=[];
getDirNames(dir,dirNameList);
//replace(fileList)
replaceFileName(fileList)

 
function replaceFileName(fileList){
    fileList.sort(function(a, b){
  return b.length - a.length;
});
console.log(fileList);
    for(let i =0;i<fileList.length;++i){
        let fileName = fileList[i];
    let item =fileName.split("\\").slice(-1);
    //console.log(item);
    if(item[0].toLowerCase().indexOf("zhaomin03")>=0){
        let arr
 
=fileName.split(path.sep);
        arr.pop();
        let dirnew = arr.join(path.sep);
        fs.renameSync(fileName, path.join(dirnew,item[0].replace("zhaomin03","Wangbo03")));
        fs.renameSync(fileName, path.join(dirnew,item[0].replace("Zhaomin03","Wangbo03")));
        
    }
    
}
}

function replace(dirNameList){
    dirNameList.sort(
 
function(a, b){
  // ASC  -> a.length - b.length
  // DESC -> b.length - a.length
  return b.length - a.length;
});
console.log(dirNameList);
    for(let i =0;i<dirNameList.length;++i){
        let folder = dirNameList[i];
    let item =folder.split("\\").slice(-1);
    //console.log(item);
    if(item[0].toLowerCase().indexOf("zhaomin03")>=0){
        let arr=folder.split(path.sep);
        arr.pop();
        let dirnew = arr.join(path.sep);
        fs.renameSync(folder, path.join(dirnew,item[0].replace("zhaomin03","Wangbo03")));
        fs.renameSync(folder, path.join(dirnew,item[0].replace("Zhaomin03","Wangbo03")));
        
    }
    
}
}


function getDirNames(dir,dirNameList){
        var files = fs.readdirSync(dir);
        for(var i=0;i<files.length;++i){
            var item =files[i];
            var state =fs.lstatSync(path.resolve(dir,item))
            if(state.isDirectory()){
                dirNameList.push(path.resolve(dir,item));
                //console.log(dirNameList);
                getDirNames(path.resolve(dir,item),dirNameList)
            }else{
                fileList.push(path.join(dir,item));
            }
        }
        
}