// OAuth login flow — opens browser, receives callback, prints tokens.
//
// Prerequisites: pnpm install && pnpm add -D open
// Run: npx tsx examples/oauth-login.ts

import * as http from 'node:http';
import {ListenHubClient} from '../src/index.js';

const client = new ListenHubClient();

// 1. Start a temporary server to receive the OAuth callback
const {port, codePromise, server} = await startCallbackServer();

// 2. Get the auth URL and open it in the browser
const {authUrl, sessionId} = await client.connectInit({callbackPort: port});
const open = (await import('open')).default;
await open(authUrl);
console.log('Opened browser for login...');

// 3. Wait for the user to authorize, then exchange the code for tokens
const code = await codePromise;
const tokens = await client.connectToken({sessionId, code});
server.close();

console.log('Login successful!');
console.log('Access token:', tokens.accessToken.slice(0, 20) + '...');
console.log('Refresh token:', tokens.refreshToken.slice(0, 20) + '...');
console.log('Expires in:', tokens.expiresIn, 'seconds');

// --- Helper ---

function startCallbackServer(): Promise<{
	port: number;
	codePromise: Promise<string>;
	server: http.Server;
}> {
	return new Promise((resolve) => {
		let resolveCode!: (code: string) => void;
		const codePromise = new Promise<string>((r) => (resolveCode = r));

		const server = http.createServer((req, res) => {
			const code = new URL(req.url!, 'http://localhost').searchParams.get('code');
			if (code) {
				res.writeHead(200, {'Content-Type': 'text/html'});
				res.end('<h1>Login successful! you can close this tab.</h1>');
				resolveCode(code);
			} else {
				res.writeHead(400).end('Missing code');
			}
		});

		server.listen(0, '127.0.0.1', () => {
			const addr = server.address() as {port: number};
			resolve({port: addr.port, codePromise, server});
		});
	});
}