// restore_from_recovery_phrase.dart

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

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

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

class _RestoreFromRecoveryPhrasePageState extends State<RestoreFromRecoveryPhrasePage> {
  final KeyManagement _keyManagement = KeyManagement();
  final TextEditingController _controller = TextEditingController();
  bool _isRestoring = false;

  Future<void> _restoreKeyPair() async {
    String mnemonic = _controller.text.trim();

    if (mnemonic.isEmpty) {
      _showErrorDialog('Please enter your recovery phrase.');
      return;
    }

    setState(() {
      _isRestoring = true;
    });

    try {
      EcdsaKeyPair keyPair = await _keyManagement.restoreKeyPair(mnemonic);
      _showSuccessDialog('Key pair restored successfully.');
    } catch (e) {
      _showErrorDialog('Failed to restore key pair: $e');
    } finally {
      setState(() {
        _isRestoring = false;
      });
    }
  }

  void _showSuccessDialog(String message) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Success'),
        content: Text(message),
        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
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      appBar: AppBar(
        title: const Text('Restore Key Pair'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: _isRestoring
            ? const Center(child: CircularProgressIndicator())
            : Column(
          children: [
            const Text(
              'Enter your 12-word recovery phrase to restore your key pair.',
              style: TextStyle(color: Colors.white),
            ),
            const SizedBox(height: 20),
            TextField(
              controller: _controller,
              decoration: const InputDecoration(
                border: OutlineInputBorder(),
                labelText: 'Recovery Phrase',
              ),
            ),
            const SizedBox(height: 20),
            ElevatedButton(
              onPressed: _restoreKeyPair,
              child: const Text('Restore Key Pair'),
            ),
          ],
        ),
      ),
    );
  }
}