import puppeteer from 'puppeteer';
import { resolve, basename } from 'path';
import { existsSync, mkdirSync } from 'fs';
import { fileURLToPath } from 'url';

const OUTPUT_DIR = resolve(fileURLToPath(import.meta.url), '../../../output/pdf');

async function generatePdf(htmlPath) {
  const absolutePath = resolve(htmlPath);
  if (!existsSync(absolutePath)) {
    console.error(`File not found: ${absolutePath}`);
    process.exit(1);
  }

  mkdirSync(OUTPUT_DIR, { recursive: true });

  const pdfName = basename(absolutePath, '.html') + '.pdf';
  const pdfPath = resolve(OUTPUT_DIR, pdfName);

  const browser = await puppeteer.launch({ headless: true });
  const page = await browser.newPage();

  await page.goto(`file://${absolutePath}`, { waitUntil: 'networkidle0' });

  await page.pdf({
    path: pdfPath,
    format: 'A4',
    printBackground: true,
    margin: { top: 0, right: 0, bottom: 0, left: 0 },
    preferCSSPageSize: true,
  });

  await browser.close();
  console.log(`PDF generated: ${pdfPath}`);
  return pdfPath;
}

const htmlFile = process.argv[2];
if (!htmlFile) {
  console.error('Usage: node generate-pdf.mjs <html-file>');
  process.exit(1);
}

generatePdf(htmlFile);