// import fs from 'fs'
var fs = require('fs')
// import csscomb from 'csscomb'
// var csscomb = require('csscomb')
// var comb = new csscomb('zen');
// console.log(comb)

// 刪除文件
const deleteFile = (path)=>{
  return new Promise(resolve => {
    fs.unlink(path, (err) => {
      if (err) {
        console.log(err)
        return
      };
      console.log(`已成功刪除 ${path}文件`);
      resolve()
    });
  })
}

// 刪除文件夾
const deleteDir = async (path)=>{
  let _files = await new Promise (resolve => {
    fs.readdir(path, (err,files) => {
      if (err) {
        console.log(err)
      };
      console.log(`已成功讀取 ${path} 文件夾`);
      resolve(files)
    })
  })

  if(_files && _files.length) {
    for(let i =0;i<_files.length;i++) {
      // console.log(_files[i],'innnnnn')
      await deleteFile('./test/'+ _files[i])
    }
  }
  // console.log('delete hou')

  await new Promise(resolve => {
    fs.rmdir(path, (err) => {
      if (err) {
        console.log(err)
      };
      console.log(`已成功刪除空 ${path}文件夾`);
      resolve()
    })
  });
}
const emptyDir = (path) => {
  return new Promise(resolve => {
    fs.rmdir(path, (err) => {
      if (err) {
        console.log(err)
      };
      console.log(`已成功刪除空 ${path}文件夾`);
      resolve()
    })
  })
}
// 新建文件夾
/**
 * 
 */
const mkdirTest = ()=>{
  return new Promise(resolve => {
    fs.mkdir('./test', { recursive: true }, (err, data)=>{
      if (err) {
        console.log(err)
      };
      console.log('新建文件夾成功')
      resolve()
    })
  })
}

// 讀取html 內(nèi)容
/**
 * 
 */
const readHtml = ()=>{
  return new Promise(resolve => {
    fs.readFile('./test.html', 'utf-8', (err, data)=>{
      if(err) {
        throw Error(err)
      }
      console.log('test.html 讀取成功！--NO1')
      resolve(data)
    })
  })
}

// 寫入css 和js
/**
 * 向文件中追加內(nèi)容
 * @param {是文件名字} path 
 * @param {寫入文件的內(nèi)容} data 
 * @param {文件類型} type 
 * @author erlinger
 * @time 
 */
const appendFile = (path, data, type) => {
  return new Promise(resolve => {
    fs.appendFile(path, data, (err) => {
      if (err) {
        console.log(err)
      };
      console.log(`${type}數(shù)據(jù)已追加到文件`);
      resolve()
    });
  })
}
// 寫一個(gè)html
const writeHtml = (path, data) => {
  return new Promise(resolve => {
    fs.writeFile(path, data, (err) =>{
      if(err) {
        console.log('err', err)
        return
      }
      console.log(`${path} 寫入成功，功能結(jié)束!`);
      resolve() // 必須resolve 。不然 promise 就到此為止，調(diào)用該方法后面的代碼將不執(zhí)行
    })
  })
}

// 插件 方法入口
(async ()=>{
  console.log('==========================game-start=============================');
  await deleteDir('./test');
  console.log('我應(yīng)該是等---刪除文件夾后---才出現(xiàn)')

  await mkdirTest();
  console.log('我應(yīng)該是在---文件夾新建成功---后出現(xiàn)！');

  let cssReg = /<style>[\s|\S]*?<\/style>/ig;
  let jsReg = /<script>[\s|\S]*?<\/script>/ig;
  let allStyleReg = /<\/style>[\s|\S]*?<style>/ig;
  let allScriptReg = /<\/script>[\s|\S]*?<script>/ig;
  let cssLink = '<link rel="stylesheet" href="./test.css" rel="external nofollow" >';
  let jsrc = '<script src="./test.js"></script>';
  let styleCollection, scriptColletion;
  let cssContent = '', jsContent = '', htmlContentStr = '';

  let originContent = await readHtml();
  styleCollection = originContent.match(cssReg);
  scriptColletion = originContent.match(jsReg);
  
  // 處理 css
  for (let i =0;i<styleCollection.length;i++) {
    cssContent += JSON.stringify(styleCollection[i]);
  }

  cssContent = cssContent.replace(/<style>/g,'').replace(/<\/style>/g, '').replace(/("")/g,'')
  
  for (let i =0;i<scriptColletion.length;i++) {
    jsContent += JSON.stringify(scriptColletion[i]);
  }
  
  jsContent = jsContent.replace(/<script>/g,'').replace(/<\/script>/g, '')
  .replace(/<\/script>"*<script>/g, '').replace(/("")/g,'')
  
  await appendFile('./test/test.css', JSON.parse(cssContent), 'css');
  console.log('我應(yīng)該是在---css寫入成功---后出現(xiàn)！');

  await appendFile('./test/test.js', JSON.parse(jsContent), 'js');
  console.log('我應(yīng)該是在---js寫入成功---后出現(xiàn)！');

  htmlContentStr = originContent
  .replace(allStyleReg, '')
  .replace(cssReg, cssLink)
  .replace(allScriptReg, '')
  .replace(jsReg, jsrc);
  console.log('copyTest.html 文本已經(jīng)格式化，準(zhǔn)備寫入');
  await writeHtml('./test/copyTest.html', htmlContentStr);

  console.log('==========================game-over=============================');
})()