import { copyFile, readdir } from 'node:fs/promises'
import path from 'node:path'

const chunksDir = path.resolve(process.cwd(), '.next/static/chunks')
const entries = await readdir(chunksDir)
const hashedMainApp = entries.find((entry) => /^main-app-[^.]+\.(js)$/.test(entry))

if (!hashedMainApp) {
  console.warn('[fix-next-main-app] No hashed main-app chunk found, skipping.')
  process.exit(0)
}

const source = path.join(chunksDir, hashedMainApp)
const target = path.join(chunksDir, 'main-app.js')

await copyFile(source, target)
console.log(`[fix-next-main-app] Copied ${hashedMainApp} -> main-app.js`)