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

import 'auth/auth_screen.dart';
import 'auth/session_store.dart';
import 'camera/camera_screen.dart';
import 'container.dart';
import 'home/home_screen.dart';
import 'payment/paywall_screen.dart';

class ObserverApp extends StatelessWidget {
  final AppContainer container;

  const ObserverApp({super.key, required this.container});

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        Provider.value(value: container),
        Provider.value(value: container.sessionStore),
        ChangeNotifierProvider.value(value: container.authViewModel),
        ChangeNotifierProvider.value(value: container.homeViewModel),
        ChangeNotifierProvider.value(value: container.paywallViewModel),
      ],
      child: MaterialApp(
        title: '视野',
        theme: ThemeData(
          colorScheme: ColorScheme.fromSeed(seedColor: Colors.green),
        ),
        initialRoute: '/gate',
        routes: {
          '/gate': (_) => const StartupGate(),
          '/login': (_) => const AuthScreen(),
          '/home': (_) => const HomeScreen(),
          '/paywall': (_) => const PaywallScreen(),
          '/camera': (_) => const CameraScreen(),
        },
      ),
    );
  }
}

/// 启动门卫：无登录 token → 登录页；已登录 → 主界面（到期状态由主界面展示）
class StartupGate extends StatefulWidget {
  const StartupGate({super.key});

  @override
  State<StartupGate> createState() => _StartupGateState();
}

class _StartupGateState extends State<StartupGate> {
  @override
  void initState() {
    super.initState();
    _check();
  }

  Future<void> _check() async {
    final session = context.read<SessionStore>();
    final token = await session.readToken();
    if (!mounted) return;
    Navigator.of(context)
        .pushReplacementNamed(token == null ? '/login' : '/home');
  }

  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      body: Center(child: CircularProgressIndicator()),
    );
  }
}