import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:cashumit/services/firefly_api_service.dart';

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

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

class _SettingsScreenState extends State<SettingsScreen> {
  final _formKey = GlobalKey<FormState>();
  final _urlController = TextEditingController();
  final _tokenController = TextEditingController();
  bool _isTestingConnection = false;
  bool _isTestingAuth = false;

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

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

  Future<void> _loadSettings() async {
    final prefs = await SharedPreferences.getInstance();
    // Tambahkan pengecekan mounted sebelum setState
    if (mounted) {
      setState(() {
        _urlController.text = prefs.getString('firefly_url') ?? '';
        _tokenController.text = prefs.getString('firefly_token') ?? '';
      });
    }
  }

  Future<void> _saveSettings() async {
    if (_formKey.currentState!.validate()) {
      final prefs = await SharedPreferences.getInstance();
      await prefs.setString('firefly_url', _urlController.text.trim());
      await prefs.setString('firefly_token', _tokenController.text.trim());
      
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Pengaturan berhasil disimpan')),
        );
      }
    }
  }

  Future<void> _testConnection() async {
    // Tambahkan pengecekan mounted
    if (!mounted) return;
    
    setState(() {
      _isTestingConnection = true;
    });

    // Simpan pengaturan terlebih dahulu
    await _saveSettings();
    
    // Uji koneksi
    final success = await FireflyApiService.testConnection(baseUrl: _urlController.text.trim());
    
    // Tambahkan pengecekan mounted sebelum setState
    if (mounted) {
      setState(() {
        _isTestingConnection = false;
      });
      
      if (success) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Koneksi berhasil!')),
        );
      } else {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Koneksi gagal. Periksa URL dan pastikan Firefly III berjalan.')),
        );
      }
    }
  }

  Future<void> _testAuthentication() async {
    // Tambahkan pengecekan mounted
    if (!mounted) return;
    
    setState(() {
      _isTestingAuth = true;
    });

    // Simpan pengaturan terlebih dahulu
    await _saveSettings();
    
    // Uji autentikasi
    final success = await FireflyApiService.testAuthentication(baseUrl: _urlController.text.trim(), accessToken: _tokenController.text.trim());
    
    // Tambahkan pengecekan mounted sebelum setState
    if (mounted) {
      setState(() {
        _isTestingAuth = false;
      });
      
      if (success) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Autentikasi berhasil!')),
        );
      } else {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Autentikasi gagal. Periksa token yang digunakan.')),
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Pengaturan Firefly III'),
        centerTitle: true,
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text(
                'Koneksi ke Firefly III',
                style: TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.bold,
                ),
              ),
              const SizedBox(height: 16),
              const Text(
                'Masukkan URL lengkap ke instance Firefly III Anda (contoh: https://firefly.example.com)',
              ),
              const SizedBox(height: 8),
              TextFormField(
                controller: _urlController,
                decoration: const InputDecoration(
                  labelText: 'Firefly III URL',
                  border: OutlineInputBorder(),
                  hintText: 'https://firefly.example.com',
                ),
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Mohon masukkan URL Firefly III';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 16),
              const Text(
                'Masukkan Personal Access Token dari Firefly III',
              ),
              const SizedBox(height: 8),
              TextFormField(
                controller: _tokenController,
                decoration: const InputDecoration(
                  labelText: 'Access Token',
                  border: OutlineInputBorder(),
                ),
                obscureText: true,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Mohon masukkan access token';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 16),
              Row(
                children: [
                  Expanded(
                    child: ElevatedButton(
                      onPressed: _isTestingConnection ? null : _testConnection,
                      child: _isTestingConnection
                          ? const Text('Menguji Koneksi...')
                          : const Text('Uji Koneksi'),
                    ),
                  ),
                  const SizedBox(width: 16),
                  Expanded(
                    child: ElevatedButton(
                      onPressed: _isTestingAuth ? null : _testAuthentication,
                      child: _isTestingAuth
                          ? const Text('Menguji Auth...')
                          : const Text('Uji Auth'),
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 16),
              SizedBox(
                width: double.infinity,
                child: ElevatedButton(
                  onPressed: _saveSettings,
                  child: const Text('Simpan Pengaturan'),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}