import { mkdir, readFile, writeFile } from 'node:fs/promises';
import { dirname, resolve } from 'node:path';
import { fileURLToPath, pathToFileURL } from 'node:url';

const publicRoutes = ['/', '/product', '/pricing', '/blogs', '/guides'];

const rootDir = resolve(dirname(fileURLToPath(import.meta.url)), '..');
const distDir = resolve(rootDir, 'dist');
const ssrEntry = resolve(rootDir, 'dist-ssr/entry-public-ssr.js');
const templatePath = resolve(distDir, 'index.html');

const template = await readFile(templatePath, 'utf8');
const { render } = await import(pathToFileURL(ssrEntry));
const baseTemplate = template.replace('<title>Socialize</title>', '');

function outputPathForRoute(route) {
  if (route === '/') {
    return resolve(distDir, 'index.html');
  }

  return resolve(distDir, route.replace(/^\//, ''), 'index.html');
}

for (const route of publicRoutes) {
  const { appHtml, headTags } = await render(route);
  const html = baseTemplate
    .replace('</head>', `${headTags.headTags}\n</head>`)
    .replace('<div id="app"></div>', `<div id="app">${appHtml}</div>`);

  const outputPath = outputPathForRoute(route);
  await mkdir(dirname(outputPath), { recursive: true });
  await writeFile(outputPath, html);
  console.log(`Prerendered ${route}`);
}