import {
  cpSync,
  existsSync,
  mkdirSync,
  readdirSync,
  readFileSync,
  renameSync,
  writeFileSync,
  rmSync,
} from 'node:fs';
import { fileURLToPath } from 'node:url';
const source = new URL('../dist/build/h5/', import.meta.url);
const destination = new URL('../../server/public/water-mini/', import.meta.url);
if (!existsSync(new URL('index.html', source)))
  throw new Error('Run npm run build:h5 before publishing the local preview.');
mkdirSync(fileURLToPath(destination), { recursive: true });
// Publish assets before switching HTML; keep previous hashed assets for already-open pages.
const html = readFileSync(new URL('index.html', source), 'utf8');
for (const match of html.matchAll(/(?:src|href)="(\/water-mini\/[^"?#]+)"/g)) {
  const relative = match[1].slice('/water-mini/'.length);
  if (!existsSync(new URL(relative, source))) throw new Error('Missing build asset: ' + relative);
}
for (const entry of readdirSync(source)) {
  if (entry !== 'index.html')
    cpSync(new URL(entry, source), new URL(entry, destination), { recursive: true });
}
const temporaryIndex = new URL('index.html.' + process.pid + '.tmp', destination);
try {
  writeFileSync(temporaryIndex, html);
  renameSync(temporaryIndex, new URL('index.html', destination));
} finally {
  rmSync(temporaryIndex, { force: true });
}
console.log('Local preview: http://127.0.0.1:8787/water-mini/index.html');