// vite build(클라이언트) + vite build --ssr(서버) 이후 실행.
// dist/server/entry-server.js 의 render()로 랜딩 HTML을 만들어 dist/index.html 의 #root 에 주입한다.
import { readFileSync, writeFileSync, rmSync } from 'node:fs';
import { resolve } from 'node:path';

const dist = resolve(process.cwd(), 'dist');
const template = readFileSync(resolve(dist, 'index.html'), 'utf-8');
const { render } = await import(resolve(dist, 'server/entry-server.js'));

const routes = ['/'];
for (const url of routes) {
  const appHtml = render(url);
  const html = template.replace('<div id="root"></div>', `<div id="root">${appHtml}</div>`);
  const out = url === '/' ? 'index.html' : `${url.replace(/^\//, '')}/index.html`;
  writeFileSync(resolve(dist, out), html);
  const words = appHtml.replace(/<[^>]*>/g, ' ').split(/\s+/).filter(Boolean).length;
  console.log(`[prerender] ${url} -> dist/${out} (${words} words)`);
}
rmSync(resolve(dist, 'server'), { recursive: true, force: true });