const fs = require('fs'), p = require('path'), c = require('crypto')
const root = p.resolve(__dirname, '../..')
const dest = fs.readFileSync(p.join(root, 'server/docs/cleanup-backup-location.txt'), 'utf8').replace(/^\uFEFF/, '').trim()
const skip = new Set(['node_modules', 'vendor', 'runtime', 'dist', '.git'])
const manifest = []
const hash = x => c.createHash('sha256').update(fs.readFileSync(x)).digest('hex')
function walk(d) {
  for (const e of fs.readdirSync(d, { withFileTypes: true })) {
    if (skip.has(e.name) || e.name.startsWith('.env') || e.name.endsWith('.zip') || e.isSymbolicLink()) continue
    const src = p.join(d, e.name)
    if (e.isDirectory()) walk(src)
    else {
      const rel = p.relative(root, src), out = p.join(dest, 'source', rel)
      fs.mkdirSync(p.dirname(out), { recursive: true })
      if (fs.existsSync(out)) throw Error('Backup already exists: ' + rel)
      fs.copyFileSync(src, out)
      if (hash(src) !== hash(out)) throw Error('Verification failed: ' + rel)
      manifest.push({ path: rel, sha256: hash(src) })
    }
  }
}
walk(root)
fs.writeFileSync(p.join(dest, 'source-manifest.json'), JSON.stringify(manifest, null, 2))
console.log('Verified source files:', manifest.length)