import { unlinkSync } from 'node:fs';
import { resolve } from 'path';
const transpiler = Bun.Transpiler({
	loader: 'cjs',
});

export default {
	port: Bun.env.BUN_PORT || Bun.env.APP_PORT || 3000,
	async fetch(req) {
		const magicKey = Math.random().toString(36).substring(2, 10);
		const url = new URL(req.url);
		if (url.pathname == '/main.js') {
			const path = resolve(__dirname, `./.cache/`);
			const filename = `${magicKey}.js`;
			const filePath = resolve(path, filename);
			const file = Bun.file(filePath);
			const result = await Bun.build({
				entrypoints: ['./src/main.js'],
				outdir: path,
				target: 'browser',
				splitting: true,
				naming: `[dir]/${filename}`,
			});

			let content = await file.arrayBuffer();
			let headers = {
				'Cache-Control': 'no-cache',
				'Content-Length': file.size,
				'Content-Type': file.type,
			};

			if (req.headers.get('accept-encoding').includes('gzip')) {
				headers['Content-Encoding'] = 'gzip';
				headers['Vary'] = 'Accept-Encoding';
				content = Bun.gzipSync(content);
			}

			const resp = new Response(content, {
				headers,
			});

			setTimeout(() => {
				unlinkSync(filePath);
			}, 400);

			return resp;
		}
		if (url.pathname == '/') {
			const file = Bun.file(resolve('./index.html'));
			let content = await file.arrayBuffer();
			let headers = {
				'Cache-Control': 'no-cache',
				'Content-Length': file.size,
				'Content-Type': file.type,
			};

			if (req.headers.get('accept-encoding').includes('gzip')) {
				headers['Content-Encoding'] = 'gzip';
				headers['Vary'] = 'Accept-Encoding';
				content = Bun.gzipSync(content);
			}

			console.log(headers, req.headers.get('accept-encoding'));
			return new Response(content, {
				headers,
			});
		}
		return new Response('ERR 404: Not Found', { status: 404 });
	},
};