const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');

const html = fs.readFileSync(path.join(__dirname, '..', 'index.html'), 'utf8');

assert.match(html, /id="downloadPdf"[^>]*>PDF herunterladen<\/button>/, 'PDF-Download-Button fehlt');

const start = html.indexOf('/* PDF-DOWNLOAD */');
const end = html.indexOf('/* PDF = Druckdialog', start);
assert.ok(start >= 0 && end > start, 'PDF-Download-Implementierung fehlt');

const sandbox = { Uint8Array, TextEncoder, Blob };
vm.createContext(sandbox);
vm.runInContext(`${html.slice(start, end)}\nglobalThis.api={pdfFilename,buildPdfBytes};`, sandbox);

const { pdfFilename, buildPdfBytes } = sandbox.api;
assert.equal(
  pdfFilename('Napoletana', 4, 250, '24 Stunden'),
  'Pizzateig-Napoletana-4x250g-24-Stunden.pdf'
);
assert.equal(
  pdfFilename('Frei/Test', 2, 199.6, 'Same:Day'),
  'Pizzateig-Frei-Test-2x200g-Same-Day.pdf'
);
assert.equal(
  pdfFilename('Römisch tonda', 4, 200, 'Über Nacht'),
  'Pizzateig-Romisch-tonda-4x200g-Uber-Nacht.pdf'
);

const bytes = buildPdfBytes([
  'PIZZATEIG — Napoletana',
  '4 Teiglinge à 250 g · 1.000 g Teig',
  'Wasser 620 g · Salz 28 g · 20 °C',
]);
assert.ok(bytes instanceof Uint8Array);
const ascii = Buffer.from(bytes).toString('latin1');
assert.ok(ascii.startsWith('%PDF-1.4'));
assert.match(ascii, /\/Type \/Catalog/);
assert.match(ascii, /\/Type \/Page\b/);
assert.match(ascii, /\/Encoding \/WinAnsiEncoding/);
assert.match(ascii, /xref\n0 \d+/);
assert.match(ascii, /%%EOF\n$/);

fs.writeFileSync('/tmp/teig-terminal-download-test.pdf', Buffer.from(bytes));
console.log('pdf download tests: OK');