import 'dart:html';
import 'dart:convert';

class Backend {
  static WebSocket? _socket;
  static String? _url;

  static void setup(String url) {
    _url = url;
    connect();
  }

  static void auth(username) {
    _socket!.send(
        json.encode({'username': username})
    );
  }

  static void connect() {
    _socket = WebSocket(_url!);
    _socket!.onOpen.listen((event) {
      print('Connected to the WebSocket server');
      auth("the-user");
      ping(); 
    });
    _socket!.onError.listen((event) {
      print('Error: $event');
      _reconnect();
    });
    _socket!.onClose.listen((event) {
      print('Disconnected. Attempting to reconnect...');
      _reconnect();
    });
  }

  static void _reconnect() {
    Future.delayed(Duration(seconds: 5), () {
      connect();
    });
  }

  static void ping() {
    if (_socket != null && _socket!.readyState == WebSocket.OPEN) {
      final data = json.encode({'path': 'ping'});
      _socket!.send(data);
      print('Ping sent: $data');
    }
  }
}