const fs = require('fs');
const path = require('path');
const https = require('https');

const vendorDir = path.join(__dirname, '..', 'public', 'vendor');
if (!fs.existsSync(vendorDir)) {
  fs.mkdirSync(vendorDir, { recursive: true });
}

const files = [
  { url: 'https://cdn.jsdelivr.net/npm/quill@2.0.2/dist/quill.snow.css', dest: 'quill.snow.css' },
  { url: 'https://cdn.jsdelivr.net/npm/quill@2.0.2/dist/quill.js', dest: 'quill.js' },
  { url: 'https://cdn.jsdelivr.net/npm/chart.js', dest: 'chart.js' },
  { url: 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js', dest: 'pdf.min.js' },
  { url: 'https://cdn.jsdelivr.net/npm/pdf-lib@1.17.1/dist/pdf-lib.min.js', dest: 'pdf-lib.min.js' }
];

function download(url, destPath) {
  return new Promise((resolve, reject) => {
    https.get(url, (res) => {
      if (res.statusCode >= 300 && res.statusCode < 400 && res.headers.location) {
        return download(res.headers.location, destPath).then(resolve).catch(reject);
      }
      if (res.statusCode !== 200) {
        return reject(new Error(`Failed to download ${url}: status ${res.statusCode}`));
      }
      const file = fs.createWriteStream(destPath);
      res.pipe(file);
      file.on('finish', () => {
        file.close(() => {
          console.log(`Downloaded: ${path.basename(destPath)} (${fs.statSync(destPath).size} bytes)`);
          resolve();
        });
      });
    }).on('error', (err) => {
      reject(err);
    });
  });
}

async function main() {
  for (const f of files) {
    const destPath = path.join(vendorDir, f.dest);
    try {
      await download(f.url, destPath);
    } catch (err) {
      console.error(`Error downloading ${f.dest}:`, err.message);
    }
  }
}

main();