// lib/screens/config_screen.dart

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

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

  @override
  State<ConfigScreen> createState() => _ConfigScreenState();
}

class _ConfigScreenState extends State<ConfigScreen> {
  final _formKey = GlobalKey<FormState>();
  final _urlController = TextEditingController();
  final _tokenController = TextEditingController();

  static const String _prefsKeyUrl = 'firefly_url';
  static const String _prefsKeyToken = 'firefly_token';

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

  /// Memuat konfigurasi yang tersimpan dari shared preferences.
  Future<void> _loadConfig() async {
    final prefs = await SharedPreferences.getInstance();
    final savedUrl = prefs.getString(_prefsKeyUrl) ?? '';
    final savedToken = prefs.getString(_prefsKeyToken) ?? '';

    setState(() {
      _urlController.text = savedUrl;
      _tokenController.text = savedToken;
    });
  }

  /// Menyimpan konfigurasi ke shared preferences.
  Future<void> _saveConfig() async {
    if (_formKey.currentState!.validate()) {
      final prefs = await SharedPreferences.getInstance();
      await prefs.setString(_prefsKeyUrl, _urlController.text);
      await prefs.setString(_prefsKeyToken, _tokenController.text);

      // Menampilkan snackbar konfirmasi
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Konfigurasi tersimpan!')),
        );
      }
    }
  }

  @override
  void dispose() {
    _urlController.dispose();
    _tokenController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Konfigurasi Firefly III'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              const Text(
                'Masukkan detail koneksi ke instance Firefly III Anda:',
                style: TextStyle(fontSize: 16),
              ),
              const SizedBox(height: 20),

              // TextField untuk URL
              TextFormField(
                controller: _urlController,
                decoration: const InputDecoration(
                  labelText: 'Firefly III URL',
                  hintText: 'https://firefly.yourdomain.com',
                  border: OutlineInputBorder(),
                ),
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'URL tidak boleh kosong';
                  }
                  // Validasi sederhana untuk URL
                  if (!value.startsWith('http')) {
                    return 'URL harus dimulai dengan http:// atau https://';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 20),

              // TextField untuk Token
              TextFormField(
                controller: _tokenController,
                decoration: const InputDecoration(
                  labelText: 'Personal Access Token',
                  border: OutlineInputBorder(),
                ),
                obscureText: true, // Sembunyikan token
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Token tidak boleh kosong';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 20),

              // Tombol Simpan
              ElevatedButton.icon(
                onPressed: _saveConfig,
                icon: const Icon(Icons.save),
                label: const Text('Simpan Konfigurasi'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}