import { type HandleFetch } from '@sveltejs/kit';

export const handleFetch: HandleFetch = async ({ request, fetch }) => {
	if (request.url.startsWith('https://maps.owlboard.info')) {
		const newUrl = request.url.replace('https://maps.owlboard.info', 'http://localhost:3000');

		const headers = new Headers(request.headers);
		headers.set('host', 'maps.owlboard.info');

		request = new Request(newUrl, {
			method: request.method,
			headers: headers,
			body: request.body,
			// @ts-expect-error - 'duplex' is needed for node fetch with bodies
			duplex: 'half'
		});
	}

	return fetch(request);
};