import 'dart:html' as html;
import 'dart:io' as io;
import 'package:flutter/material.dart';
import 'chat_screen.dart';
import 'backend.dart';

class Config {
  static String? backendUrl; // Declare it as nullable

  static void loadConfig() {
    // Check the platform for web or other
    if (html.window.location.origin.isNotEmpty) {
      // For web applications
      backendUrl = html.window.location.origin; // Get the server URL from window.location
    } else if (io.Platform.environment.containsKey('BACKEND_URL')) {
      // For Android or other platforms, check for the environment variable
      backendUrl = io.Platform.environment['BACKEND_URL'];
    } else {
      // If no value is determined, set it to null
      backendUrl = null;
    }
  }
}

void main() {
  Config.loadConfig(); // Load the configuration before running the app

  Backend.setup('${Config.backendUrl}/ws');
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Chat',
      theme: ThemeData.dark(),
      home: const ChatScreen(),
    );
  }
}