import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:descope/descope.dart';
import 'package:go_router/go_router.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:flutter_web_plugins/url_strategy.dart';
import 'features/auth/presentation/login_screen.dart';
import 'features/dashboard/presentation/dashboard_screen.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  usePathUrlStrategy();

  // Load Env (Handling error if missing for now)
  try {
    await dotenv.load(fileName: ".env");
  } catch (e) {
    debugPrint("Warning: .env file not found.");
  }

  // Initialize Descope
  final projectId = dotenv.env['DESCOPE_PROJECT_ID'] ?? 'your-project-id';
  Descope.setup(projectId);

  // Load saved session if any
  try {
    await Descope.sessionManager.loadSession();
  } catch (e) {
    debugPrint("Failed to load session: $e");
  }

  runApp(const ProviderScope(child: BaronSSOApp()));
}

// Router Configuration
final _router = GoRouter(
  initialLocation: '/',
  routes: [
    GoRoute(path: '/', builder: (context, state) => const LoginScreen()),
    GoRoute(
      path: '/verify/:token',
      builder: (context, state) {
        final token = state.pathParameters['token'];
        return LoginScreen(verificationToken: token);
      },
    ),
    GoRoute(
      path: '/dashboard',
      builder: (context, state) => const DashboardScreen(),
    ),
  ],
  redirect: (context, state) {
    final isLoggedIn =
        Descope.sessionManager.session?.refreshToken.isExpired == false;
    final path = state.uri.path;
    final isLoggingIn = path == '/' || path.startsWith('/verify/');

    if (!isLoggedIn && !isLoggingIn) return '/';
    if (isLoggedIn && path == '/') return '/dashboard';

    return null;
  },
);

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: 'Baron SSO',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(
          seedColor: const Color(0xFF1A1F2C), // Dark Navy/Black base
          brightness: Brightness.light,
        ),
        useMaterial3: true,
        textTheme: GoogleFonts.interTextTheme(),
      ),
      routerConfig: _router,
    );
  }
}