import { readdirSync, statSync } from 'node:fs';
import { resolve } from 'node:path';

const assetsDirectory = resolve(process.cwd(), 'dist/assets');
const assets = readdirSync(assetsDirectory);
const excelAssets = assets.filter((name) => /^exceljs(?:\.min)?-[\w-]+\.js$/.test(name));
const mileageWorkers = assets.filter((name) => /^mileageExport\.worker-[\w-]+\.js$/.test(name));

if (excelAssets.length !== 1) {
  throw new Error(`production build must contain exactly one ExcelJS asset, found ${excelAssets.length}: ${excelAssets.join(', ') || 'none'}`);
}
if (mileageWorkers.length !== 1) {
  throw new Error(`production build must contain exactly one mileage export worker, found ${mileageWorkers.length}: ${mileageWorkers.join(', ') || 'none'}`);
}

const excelBytes = statSync(resolve(assetsDirectory, excelAssets[0])).size;
const workerBytes = statSync(resolve(assetsDirectory, mileageWorkers[0])).size;
process.stdout.write(`web_build_gate=ok exceljs_assets=1 exceljs_bytes=${excelBytes} mileage_workers=1 worker_bytes=${workerBytes}\n`);