import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'core/auth/auth_state.dart';
import 'core/router/app_router.dart';
import 'core/theme/app_theme.dart';

void main() {
  FlutterError.onError = (details) {
    FlutterError.presentError(details);
    debugPrint('═══ FlutterError ════════════════════════════');
    debugPrint(details.exceptionAsString());
    debugPrint(details.stack.toString());
  };

  runZonedGuarded(
    () => runApp(const ProviderScope(child: JiuApp())),
    (error, stack) {
      debugPrint('═══ Zone Error ═══════════════════════════════');
      debugPrint(error.toString());
      debugPrint(stack.toString());
    },
  );
}

class JiuApp extends ConsumerWidget {
  const JiuApp({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return MaterialApp(
      title: '酒库管理系统',
      theme: AppTheme.light(),
      debugShowCheckedModeBanner: false,
      home: const _AppBootstrap(),
    );
  }
}

/// Restores persisted auth before handing off to the router.
class _AppBootstrap extends ConsumerStatefulWidget {
  const _AppBootstrap();

  @override
  ConsumerState<_AppBootstrap> createState() => _AppBootstrapState();
}

class _AppBootstrapState extends ConsumerState<_AppBootstrap> {
  bool _ready = false;

  @override
  void initState() {
    super.initState();
    _init();
  }

  Future<void> _init() async {
    await ref.read(authStateProvider.notifier).restore();
    if (mounted) setState(() => _ready = true);
  }

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

class _RouterApp extends ConsumerWidget {
  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final router = ref.watch(appRouterProvider);
    return MaterialApp.router(
      title: '酒库管理系统',
      theme: AppTheme.light(),
      routerConfig: router,
      debugShowCheckedModeBanner: false,
      builder: (context, child) => SelectionArea(child: child!),
    );
  }
}