const fs = require("node:fs");
const path = require("node:path");
const { brotliCompressSync, gzipSync } = require("node:zlib");

const distDirectory = path.resolve(process.cwd(), "dist");

function getFiles(directory) {
  return fs.readdirSync(directory, { withFileTypes: true }).flatMap((entry) => {
    const entryPath = path.join(directory, entry.name);
    return entry.isDirectory() ? getFiles(entryPath) : [entryPath];
  });
}

function toKilobytes(bytes) {
  return `${(bytes / 1000).toFixed(2)} kB`;
}

if (!fs.existsSync(distDirectory)) {
  console.error("dist/ nicht gefunden. Bitte zuerst npm run build ausführen.");
  process.exit(1);
}

const rows = getFiles(distDirectory)
  .sort()
  .map((filePath) => {
    const contents = fs.readFileSync(filePath);
    return {
      Datei: path.relative(distDirectory, filePath),
      Unkomprimiert: toKilobytes(contents.length),
      GZip: toKilobytes(gzipSync(contents).length),
      Brotli: toKilobytes(brotliCompressSync(contents).length),
    };
  });

console.table(rows);