const { promises } = require("fs"); // used for caching
const path = require("path");

const { ElectronBlocker } = require("@cliqz/adblocker-electron");
const { session } = require("electron");
const fetch = require("node-fetch");

const SOURCES = [
	"https://raw.githubusercontent.com/kbinani/adblock-youtube-ads/master/signed.txt"
];

const loadAdBlockerEngine = (enableBlocking = false) =>
	ElectronBlocker.fromLists(
		fetch,
		SOURCES,
		{},
		{
			path: path.resolve(__dirname, "ad-blocker-engine.bin"),
			read: promises.readFile,
			write: promises.writeFile
		}
	)
		.then(blocker => {
			if (enableBlocking) {
				blocker.enableBlockingInSession(session.defaultSession);
			}
		})
		.catch(err => console.log("Error loading adBlocker engine", err));

module.exports = { loadAdBlockerEngine };
if (require.main === module) {
	loadAdBlockerEngine(false); // Generate the engine without enabling it
}