import { readdir, readFile, writeFile, cp } from 'node:fs/promises';

try {
  const dirs = await readdir('.', { withFileTypes: true });
  for (const dir of dirs) {
    if (dir.path.startsWith('.')) continue
    if (dir.isDirectory()) {
      let pack
      try {
        const packFile = (await readFile(dir.path + '/pack.json')).toString()
        pack = JSON.parse(packFile).pack
      } catch {
        continue
      }
      const contents = await readdir(dir.path, { withFileTypes: true });
      const files = Object.fromEntries(
        contents
          .map(x => [x.name.replace(/\.\w+$/, ''), x.name])
          .filter(([k, v]) => v.match(/\.(a?png|jpe?g|gif)$/) != null)
      )
      cp(dir.path + '/pack.json', dir.path + '/pack_backup.json')
      const output = { files, pack, files_count: Object.keys(files).length }
      await writeFile(dir.path + '/pack.json', JSON.stringify(output, null, 2))
    }
  }
} catch (err) {
  console.error(err);
}