// EmergencyRecoveryScreen - 簡素化された緊急回復画面
import 'package:flutter/material.dart';

class EmergencyRecoveryScreen extends StatelessWidget {
  final String errorMessage;
  
  const EmergencyRecoveryScreen({super.key, this.errorMessage = ''});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
            colors: [Colors.orange.shade50, Colors.yellow.shade50],
          ),
        ),
        child: SafeArea(
          child: Center(
            child: SingleChildScrollView(
              padding: const EdgeInsets.all(24),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Icon(
                    Icons.refresh, 
                    size: 80, 
                    color: Colors.deepOrange.shade600,
                  ),
                  const SizedBox(height: 16),
                  
                  Text(
                    'アプリの停止が発生しました',
                    textAlign: TextAlign.center,
                    style: TextStyle(
                      fontSize: 20,
                      fontWeight: FontWeight.bold,
                      color: Colors.orange[700],
                    ),
                  ),
                  
                  const SizedBox(height: 8),
                  
                  Text(
                    errorMessage.isNotEmpty ? errorMessage : 'アプリが異常に停止しました。',
                    textAlign: TextAlign.center,
                    style: TextStyle(color: Colors.grey[600]),
                  ),
                  
                  const SizedBox(height: 32),
                  
                  ElevatedButton.icon(
                    icon: Icon(Icons.refresh),
                    label: Text('アプリを再起動'),
                    style: ElevatedButton.styleFrom(
                      padding: const EdgeInsets.symmetric(vertical: 16),
                    ),
                    onPressed: () => _rebootApp(context),
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  Future<void> _rebootApp(BuildContext context) async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('アプリを再起動しますか？'),
        content: Text(errorMessage.isNotEmpty ? errorMessage : 'アプリが正常に動作していないようです。再起動しますか？'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('キャンセル')),
          ElevatedButton(
            onPressed: () {
              if (context.mounted) {
                WidgetsBinding.instance.addPostFrameCallback((_) {
                  SystemNavigator.pop();
                });
                Navigator.pop(ctx, true);
              }
            },
            style: ElevatedButton.styleFrom(backgroundColor: Colors.blue.shade500),
            child: const Text('再起動'),
          ),
        ],
      ),
    );

    if (confirmed == true) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        SystemNavigator.pop();
      });
    }
  }
}