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

class LocalizationService {
  static final LocalizationService _instance = LocalizationService._internal();
  static LocalizationService get instance => _instance;

  Locale _currentLocale = const Locale('id');
  Locale get currentLocale => _currentLocale;

  final Map<String, Map<String, String>> _localizedValues = {
    'id': {
      // Common
      'app_name': 'Plant Disease Detection',
      'ok': 'OK',
      'cancel': 'Batal',
      'back': 'Kembali',
      'retry': 'Coba Lagi',
      'error': 'Error',
      'success': 'Berhasil',
      
      // Plant Scanner
      'analyze_plant': 'Analisis Tanaman',
      'take_photo': 'Ambil Foto',
      'choose_from_gallery': 'Pilih dari Galeri',
      'analyzing': 'Menganalisis...',
      'plant_detected': 'Tanaman Terdeteksi',
      'no_plant_detected': 'Tidak Ada Tanaman Terdeteksi',
      'disease_detected': 'Penyakit Terdeteksi',
      'healthy_plant': 'Tanaman Sehat',
      'symptoms': 'Gejala',
      'treatment': 'Pengobatan',
      'prevention': 'Pencegahan',
      'confidence': 'Tingkat Kepercayaan',
      
      // Help Dialog
      'help_title': 'Panduan Penggunaan',
      'help_take_clear_photo': 'Ambil foto dengan pencahayaan yang baik',
      'help_focus_infected': 'Fokus pada bagian tanaman yang terinfeksi',
      'help_ensure_clear': 'Pastikan gambar jelas dan tidak buram',
      'got_it': 'Mengerti',
    },
    'en': {
      // Common
      'app_name': 'Plant Disease Detection',
      'ok': 'OK',
      'cancel': 'Cancel',
      'back': 'Back',
      'retry': 'Retry',
      'error': 'Error',
      'success': 'Success',
      
      // Plant Scanner
      'analyze_plant': 'Analyze Plant',
      'take_photo': 'Take Photo',
      'choose_from_gallery': 'Choose from Gallery',
      'analyzing': 'Analyzing...',
      'plant_detected': 'Plant Detected',
      'no_plant_detected': 'No Plant Detected',
      'disease_detected': 'Disease Detected',
      'healthy_plant': 'Healthy Plant',
      'symptoms': 'Symptoms',
      'treatment': 'Treatment',
      'prevention': 'Prevention',
      'confidence': 'Confidence',
      
      // Help Dialog
      'help_title': 'Usage Guide',
      'help_take_clear_photo': 'Take a photo with good lighting',
      'help_focus_infected': 'Focus on the infected part of the plant',
      'help_ensure_clear': 'Ensure the image is clear and not blurry',
      'got_it': 'Got it',
    },
  };

  LocalizationService._internal();

  String getString(String key) {
    return _localizedValues[_currentLocale.languageCode]?[key] ?? key;
  }

  void setLocale(Locale locale) {
    if (_localizedValues.containsKey(locale.languageCode)) {
      _currentLocale = locale;
    }
  }

  bool isIndonesian() {
    return _currentLocale.languageCode == 'id';
  }

  void toggleLanguage() {
    setLocale(_currentLocale.languageCode == 'id' ? const Locale('en') : const Locale('id'));
  }
}