import 'package:flutter/material.dart';
import '../services/api_service.dart';
import '../services/security_service.dart';
import 'security_screen.dart';

class SettingsScreen extends StatefulWidget {
  const SettingsScreen({super.key, required this.apiService});

  final ApiService apiService;

  @override
  State<SettingsScreen> createState() => _SettingsScreenState();
}

class _SettingsScreenState extends State<SettingsScreen> {
  final _controller = TextEditingController();
  bool _testing = false;
  String? _message;

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

  Future<void> _load() async {
    _controller.text = await widget.apiService.getBaseUrl();
    if (mounted) setState(() {});
  }

  Future<void> _save() async {
    await widget.apiService.setBaseUrl(_controller.text);
    if (mounted) {
      setState(() => _message = 'URL enregistrée localement.');
    }
  }

  Future<void> _test() async {
    setState(() {
      _testing = true;
      _message = null;
    });

    try {
      await _save();
      final ok = await widget.apiService.healthCheck();
      setState(() => _message = ok ? 'Connexion OK.' : 'Réponse inattendue du serveur.');
    } catch (e) {
      setState(() => _message = 'Erreur : $e');
    } finally {
      if (mounted) setState(() => _testing = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Paramètres'),
      ),
      body: ListView(
        padding: const EdgeInsets.all(16),
        children: [
          const Text(
            'URL du backend FIN65',
            style: TextStyle(fontSize: 18, fontWeight: FontWeight.w700),
          ),
          const SizedBox(height: 8),
          const Text(
            'Émulateur Android : http://10.0.2.2:8000\nTéléphone réel : http://IP_DU_PC:8000',
          ),
          const SizedBox(height: 16),
          TextField(
            controller: _controller,
            decoration: const InputDecoration(
              labelText: 'URL API',
              border: OutlineInputBorder(),
              hintText: 'http://192.168.1.25:8000',
            ),
            keyboardType: TextInputType.url,
          ),
          const SizedBox(height: 12),
          FilledButton(
            onPressed: _testing ? null : _test,
            child: Text(_testing ? 'Test...' : 'Enregistrer et tester'),
          ),
          if (_message != null) ...[
            const SizedBox(height: 16),
            Text(_message!),
          ],
          const SizedBox(height: 24),
          Card(
            child: ListTile(
              leading: const Icon(Icons.lock),
              title: const Text('Sécurité'),
              subtitle: const Text('Activer, changer ou désactiver le verrouillage PIN.'),
              trailing: const Icon(Icons.chevron_right),
              onTap: () {
                Navigator.of(context).push(
                  MaterialPageRoute(
                    builder: (_) => SecurityScreen(
                      securityService: SecurityService(),
                    ),
                  ),
                );
              },
            ),
          ),
          const SizedBox(height: 12),
          const Card(
            child: Padding(
              padding: EdgeInsets.all(12),
              child: Text(
                'L’URL est stockée dans la base SQLite locale du mobile. '
                'Elle reste donc disponible même sans backend.',
              ),
            ),
          ),
        ],
      ),
    );
  }
}