// generate_with_recovery_phrase.dart

import 'package:bip39_mnemonic/bip39_mnemonic.dart';
import 'package:flutter/material.dart';
import 'widgets/key_management.dart';

class GenerateWithRecoveryPhrasePage extends StatefulWidget {
  const GenerateWithRecoveryPhrasePage({super.key});

  @override
  _GenerateWithRecoveryPhrasePageState createState() => _GenerateWithRecoveryPhrasePageState();
}

class _GenerateWithRecoveryPhrasePageState extends State<GenerateWithRecoveryPhrasePage> {
  final KeyManagement _keyManagement = KeyManagement();
  bool _isGenerating = false;
  String? _recoveryPhrase;

  Future<void> _generateKeyPair() async {
    setState(() {
      _isGenerating = true;
    });

    try {
      Mnemonic mnemonic = await _keyManagement.generateKeyPairWithRecovery();
      setState(() {
        _recoveryPhrase = mnemonic.toString();
      });
      _showRecoveryPhraseDialog(mnemonic.toString());
    } catch (e) {
      _showErrorDialog('Failed to generate key pair: $e');
    } finally {
      setState(() {
        _isGenerating = false;
      });
    }
  }

  void _showRecoveryPhraseDialog(String phrase) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Recovery Phrase'),
        content: SingleChildScrollView(
          child: Text(
            'Please write down your recovery phrase and keep it in a safe place. This phrase can be used to restore your key pair.\n\n$phrase',
            style: const TextStyle(fontSize: 16),
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('OK'),
          ),
        ],
      ),
    );
  }

  void _showErrorDialog(String message) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Error'),
        content: Text(message),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('OK'),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      appBar: AppBar(
        title: const Text('Generate Key Pair with Recovery'),
      ),
      body: Center(
        child: _isGenerating
            ? const CircularProgressIndicator()
            : ElevatedButton(
          onPressed: _generateKeyPair,
          child: const Text('Generate Key Pair'),
        ),
      ),
    );
  }
}