import * as fs from 'fs'
import os from 'os'
export function deleteFolder(dir) {
  let files = [];
  if (fs.existsSync(dir)) {
    files = fs.readdirSync(dir);
    files.forEach((file) => {
      const curPath = dir + '/' + file
      if (fs.statSync(curPath).isDirectory()) {
        deleteFolder(curPath);
      } else if (fs.existsSync(curPath)) {
        fs.unlinkSync(curPath)
      }
    })
    fs.existsSync(dir) && fs.rmdirSync(dir)
  }
}

export function bytesToSize(bytes) {
  if (bytes === 0) return '0 B'
  const k = 1024
  const sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
  const i = Math.floor(Math.log(bytes) / Math.log(k))
  const num = bytes / Math.pow(k, i)
  return num.toPrecision(3) + ' ' + sizes[i]
}

export function getLocalIP() {
  const networkInterfaces = os.networkInterfaces();
  let localIP;
 
  Object.keys(networkInterfaces).forEach((e) => {
    networkInterfaces[e].forEach(network => {
      if (network.family === 'IPv4' && !network.internal) {
        localIP = network.address;
      }
    });
  });
 
  return localIP;
}