/**
 * GET /api/scrcpy-server
 *
 * Proxies the scrcpy-server binary from GitHub releases.
 * Fixes CORS issues (GitHub doesn't send Access-Control-Allow-Origin for binaries).
 * Server-side fetch has no CORS restrictions.
 *
 * Response is cached by the browser for 24 hours via Cache-Control header.
 */

import type { RequestHandler } from './$types';

const GITHUB_URL =
	'https://github.com/Genymobile/scrcpy/releases/download/v2.3/scrcpy-server-v2.3';

export const GET: RequestHandler = async () => {
	try {
		const response = await fetch(GITHUB_URL);

		if (!response.ok) {
			console.error(`[scrcpy-server] GitHub returned ${response.status}`);
			return new Response(`Failed to fetch scrcpy-server: ${response.status}`, {
				status: 502
			});
		}

		// Stream the response directly — don't buffer the entire binary in memory on the server
		return new Response(response.body, {
			headers: {
				'Content-Type': 'application/octet-stream',
				'Cache-Control': 'public, max-age=86400, immutable'
			}
		});
	} catch (e) {
		console.error('[scrcpy-server] Fetch failed:', e);
		return new Response('Failed to fetch scrcpy-server from GitHub', { status: 500 });
	}
};