const fs = require('fs/promises')
const path = require('path')
const { spawn } = require('child_process')

const repoRoot = process.cwd()
const nextBin = path.join(repoRoot, 'node_modules', 'next', 'dist', 'bin', 'next')
const tscBin = path.join(repoRoot, 'node_modules', 'typescript', 'bin', 'tsc')

function run(command, args) {
  return new Promise((resolve, reject) => {
    const child = spawn(command, args, {
      cwd: repoRoot,
      stdio: 'inherit',
      shell: false,
    })

    child.on('exit', (code) => {
      if (code === 0) {
        resolve()
        return
      }

      reject(new Error(`${command} ${args.join(' ')} exited with code ${code}`))
    })
  })
}

async function ensureNextCacheLifeStub() {
  const typesDir = path.join(repoRoot, '.next', 'types')
  const cacheLifePath = path.join(typesDir, 'cache-life.d.ts')

  await fs.mkdir(typesDir, { recursive: true })

  try {
    await fs.access(cacheLifePath)
  } catch {
    await fs.writeFile(cacheLifePath, '', 'utf8')
  }
}

async function main() {
  await run(process.execPath, [nextBin, 'typegen'])
  await ensureNextCacheLifeStub()
  await run(process.execPath, [tscBin, '--noEmit', '--incremental', 'false'])
}

main().catch((error) => {
  console.error(error)
  process.exitCode = 1
})