import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:logger/logger.dart';
import 'pages/login.dart';
import 'pages/home.dart';

void main() {
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Ping Pong Tracker',
      theme: ThemeData.dark(useMaterial3: true).copyWith(
        colorScheme: ColorScheme.dark(
          primary: Colors.blue.shade800,
        ),
      ),
      home: EntryPoint(),
    );
  }
}

class EntryPoint extends StatelessWidget {
  final Logger _logger = Logger();

  Future<Widget> _getInitialPage() async {
    _logger.d("Fetching token from SharedPreferences");
    final prefs = await SharedPreferences.getInstance();
    final token = prefs.getString('token');
    _logger.d("Token value from SharedPreferences: $token");

    if (token == null || token.isEmpty) {
      _logger.d("No token found. Returning LoginPage.");
      return LoginPage();
    } else {
      _logger.d("Token found. Returning HomePage.");
      return HomePage();
    }
  }

  @override
  Widget build(BuildContext context) {
    _logger.d("Building EntryPoint UI with FutureBuilder");
    return FutureBuilder<Widget>(
      future: _getInitialPage(),
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          _logger.d("Waiting for initial page resolution.");
          return const Scaffold(
            body: Center(child: CircularProgressIndicator()),
          );
        } else if (snapshot.hasError) {
          _logger.e("Error while resolving initial page: ${snapshot.error}");
          return LoginPage(); // Fallback to LoginPage on error
        } else {
          _logger.d("Navigation target resolved: ${snapshot.data.runtimeType}");
          return snapshot.data!;
        }
      },
    );
  }
}