import path from 'node:path';

import createDebug from 'debug';

import { getPuppeteerLaunchConfig, getPageOptions, revealBasePath } from './config.js';

const debug = createDebug('reveal-md');

let puppeteer;

try {

puppeteer = await import('puppeteer');

} catch (err) {

console.warn(`Puppeteer unavailable, unable to generate PDF file.`);

debug(err);

}

// Exports ---------------------------------------------------------------------

export default async (initialUrl, print, printSize) => {

if (!puppeteer) {

return;

}

const puppeteerLaunchConfig = getPuppeteerLaunchConfig();

const printPluginPath = path.join(revealBasePath, 'plugin', 'print-pdf', 'print-pdf.js');

const filename = path.basename(initialUrl);

const pdfFilename = typeof print === 'string' ? print : filename.replace(/\.md$/, '.pdf');

debug({ initialUrl, printPluginPath, pdfFilename, puppeteerLaunchConfig });

console.log(`Attempting to print "${filename}" to "${pdfFilename}".`);

try {

const browser = await puppeteer.launch(puppeteerLaunchConfig);

const page = await browser.newPage();

const pdfOptions = { path: pdfFilename, printBackground: true };

Object.assign(pdfOptions, getPageOptions(printSize));

await page.goto(`${initialUrl}?view=print`, { waitUntil: 'networkidle0' });

await page.pdf(pdfOptions);

await browser.close();

} catch (err) {

console.error(`Error while generating PDF for "${filename}"`);

debug(err);

}

};