import fs from 'node:fs'
import path from 'node:path'

const desktopDir = path.resolve(import.meta.dirname, '..')
const prebuildsDir = path.join(desktopDir, 'node_modules', 'node-pty', 'prebuilds')

function ensureExecutable(filePath: string): boolean {
  const stat = fs.statSync(filePath)
  if (!stat.isFile()) return false

  const executableMode = stat.mode | 0o755
  if ((stat.mode & 0o777) !== (executableMode & 0o777)) {
    fs.chmodSync(filePath, executableMode)
    return true
  }

  return false
}

if (!fs.existsSync(prebuildsDir)) {
  throw new Error(`node-pty prebuilds directory is missing: ${prebuildsDir}`)
}

let helpersSeen = 0
let helpersChanged = 0

for (const platformDir of fs.readdirSync(prebuildsDir)) {
  const helperPath = path.join(prebuildsDir, platformDir, 'spawn-helper')
  if (!fs.existsSync(helperPath)) continue

  helpersSeen += 1
  if (ensureExecutable(helperPath)) {
    helpersChanged += 1
  }
}

if (process.platform === 'darwin' && helpersSeen === 0) {
  throw new Error(`node-pty spawn-helper is missing under ${prebuildsDir}`)
}

console.log(`[prepare-node-pty] spawn-helper executable bits verified (${helpersChanged}/${helpersSeen} updated)`)