import jwt from 'jsonwebtoken';
import * as dotenv from 'dotenv';

dotenv.config({ path: '.env' });

export const handle = async ({ event, resolve }) => {
	const theme = event.cookies.get('theme');
	const JWT = event.cookies.get('jwt');

	if (process.env.JWT_SECRET === undefined) {
		throw new Error('JWT_SECRET not defined');
	}

	if (JWT) {
		try {
			const decoded = jwt.verify(JWT, process.env.JWT_SECRET);
		} catch (err) {
			event.cookies.delete('jwt', { path: '/' });
		}
	}

	if (!theme) {
		return await resolve(event);
	}
	return await resolve(event, {
		transformPageChunk: ({ html }) => {
			return html.replace('data-theme=""', `data-theme="${theme}"`);
		}
	});
};