import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'services/push_notification_background.dart';
import 'services/push_notification_service.dart';

final _navigatorKey = GlobalKey<NavigatorState>();

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

  await Firebase.initializeApp();

  FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);

  final pushService = PushNotificationService();
  pushService.init();

  runApp(MyApp(pushService: pushService));
}

class MyApp extends StatelessWidget {
  final PushNotificationService pushService;

  const MyApp({super.key, required this.pushService});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Mattermost',
      navigatorKey: _navigatorKey,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: const MyHomePage(title: 'Mattermost'),
      builder: (context, child) {
        // 알림 탭 시 네비게이션 콜백 등록
        pushService.onNavigateToChannel = (serverUrl, channelId) {
          // TODO: 채널 화면으로 이동
          // _navigatorKey.currentState?.pushNamed(
          //   '/channel',
          //   arguments: {'serverUrl': serverUrl, 'channelId': channelId},
          // );
          print('[Nav] Navigate to channel: $channelId on $serverUrl');
        };
        pushService.onNavigateToThread = (serverUrl, rootId) {
          // TODO: 스레드 화면으로 이동
          // _navigatorKey.currentState?.pushNamed(
          //   '/thread',
          //   arguments: {'serverUrl': serverUrl, 'rootId': rootId},
          // );
          print('[Nav] Navigate to thread: $rootId on $serverUrl');
        };
        return child!;
      },
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: const Center(
        child: Text('Mattermost Flutter'),
      ),
    );
  }
}