import { readdirSync, readFileSync, writeFileSync } from 'node:fs'
import { basename, resolve } from 'node:path'
import JavaScriptObfuscator from 'javascript-obfuscator'

const assetsDirectory = resolve('dist/assets')
const appChunks = readdirSync(assetsDirectory)
  .filter((file) => file.endsWith('.js') && !file.startsWith('vendor-'))
  .map((file) => resolve(assetsDirectory, file))

if (!appChunks.length) throw new Error('No application chunks found to obfuscate')

const options = {
  identifierNamesGenerator: 'hexadecimal',
  stringArray: true,
  stringArrayEncoding: ['base64'],
  stringArrayThreshold: 0.75,
  splitStrings: true,
  splitStringsChunkLength: 8,
  controlFlowFlattening: false,
  deadCodeInjection: false,
  selfDefending: false,
  debugProtection: false,
  renameGlobals: false,
  sourceMap: false,
}

let originalBytes = 0
let obfuscatedBytes = 0
for (const file of appChunks) {
  const source = readFileSync(file, 'utf8')
  const output = JavaScriptObfuscator.obfuscate(source, options).getObfuscatedCode()
  writeFileSync(file, output)
  originalBytes += Buffer.byteLength(source)
  obfuscatedBytes += Buffer.byteLength(output)
  console.log(`obfuscated ${basename(file)}`)
}

console.log(`application chunks: +${((obfuscatedBytes / originalBytes - 1) * 100).toFixed(1)}% raw size`)