import { existsSync, mkdirSync, createWriteStream, unlinkSync } from 'fs';
import { resolve, dirname } from 'path';
import { fileURLToPath } from 'url';
import { get } from 'https';

const __dirname = dirname(fileURLToPath(import.meta.url));
const rootDir = resolve(__dirname, '..');
const libDir = resolve(rootDir, 'jars', 'pmd', 'lib');

const PMD_VERSION = '7.26.0';
const PMD_JARS = [
  `pmd-core-${PMD_VERSION}.jar`,
  `pmd-java-${PMD_VERSION}.jar`,
  `pmd-javascript-${PMD_VERSION}.jar`,
  `pmd-jsp-${PMD_VERSION}.jar`,
];

const MAVEN_BASE = `https://repo1.maven.org/maven2/net/sourceforge/pmd`;

function downloadFile(url, dest) {
  return new Promise((resolvePromise, reject) => {
    const file = createWriteStream(dest);
    get(url, (response) => {
      if (response.statusCode === 302 || response.statusCode === 301) {
        downloadFile(response.headers.location, dest).then(resolvePromise).catch(reject);
        return;
      }
      response.pipe(file);
      file.on('finish', () => { file.close(); resolvePromise(); });
      file.on('error', (err) => { unlinkSync(dest); reject(err); });
    }).on('error', (err) => { unlinkSync(dest); reject(err); });
  });
}

if (!existsSync(libDir)) {
  mkdirSync(libDir, { recursive: true });
}

for (const jar of PMD_JARS) {
  const moduleName = jar.replace(`-${PMD_VERSION}.jar`, '').replace('pmd-', '');
  const url = `${MAVEN_BASE}/pmd-${moduleName}/${PMD_VERSION}/${jar}`;
  const dest = resolve(libDir, jar);

  if (existsSync(dest)) {
    console.log(`Skip: ${jar} (exists)`);
    continue;
  }

  console.log(`Downloading: ${url}`);
  await downloadFile(url, dest);
  console.log(`Done: ${jar}`);
}

console.log('PMD JARs download complete.');