import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import 'screens/scan_screen.dart';
import 'services/ble_client.dart';
import 'services/protocol_log.dart';
import 'settings.dart';
import 'theme.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Future.wait([ProtocolLog.instance.init(), AppSettings.instance.load()]);
  SystemChrome.setSystemUIOverlayStyle(const SystemUiOverlayStyle(
    statusBarColor: Colors.transparent,
    statusBarIconBrightness: Brightness.light,
    systemNavigationBarColor: OsColors.background,
  ));
  runApp(const OpenScooterApp());
}

/// Single BLE client for the whole app (one active connection at a time).
final _ble = FlutterBleClient();

/// Logs route changes into the protocol log for field debugging.
class _RouteLogger extends NavigatorObserver {
  @override
  void didPush(Route route, Route? previous) =>
      ProtocolLog.instance.log('NAV', 'push ${route.settings.name ?? route.runtimeType}');
  @override
  void didPop(Route route, Route? previous) =>
      ProtocolLog.instance.log('NAV', 'pop ${route.settings.name ?? route.runtimeType}');
  @override
  void didRemove(Route route, Route? previous) =>
      ProtocolLog.instance.log('NAV', 'remove ${route.settings.name ?? route.runtimeType}');
}

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

  @override
  Widget build(BuildContext context) {
    final settings = AppSettings.instance;
    return ListenableBuilder(
      listenable: settings,
      builder: (context, _) => MaterialApp(
        title: 'OpenMotion',
        debugShowCheckedModeBanner: false,
        theme: buildOsTheme(settings.accent.color),
        navigatorObservers: [_RouteLogger()],
        home: ScanScreen(ble: _ble),
      ),
    );
  }
}