import 'package:flutter/material.dart';
import '../services/database.dart';

class AppState extends ChangeNotifier {
  final DatabaseService _db = DatabaseService();

  bool _darkMode = false;
  String _mapStyle = 'voyager'; // 'voyager', 'osm', 'dark', 'positron'
  bool _isLoaded = false;

  bool get darkMode => _darkMode;
  String get mapStyle => _mapStyle;
  bool get isLoaded => _isLoaded;

  ThemeData get theme => _darkMode ? _darkTheme : _lightTheme;

  String get tileUrl {
    if (_darkMode) {
      return 'https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png';
    }
    switch (_mapStyle) {
      case 'osm':
        return 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';
      case 'dark':
        return 'https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png';
      case 'positron':
        return 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png';
      case 'voyager':
      default:
        return 'https://{s}.basemaps.cartocdn.com/rastertiles/voyager/{z}/{x}/{y}{r}.png';
    }
  }

  String get tileSubdomains => 'abcd';

  Future<void> loadSettings() async {
    _darkMode = await _db.getSetting('dark_mode', false);
    _mapStyle = await _db.getSetting('map_style', 'voyager');
    _isLoaded = true;
    notifyListeners();
  }

  Future<void> setDarkMode(bool value) async {
    _darkMode = value;
    notifyListeners();
    await _db.setSetting('dark_mode', value);
  }

  Future<void> setMapStyle(String style) async {
    _mapStyle = style;
    notifyListeners();
    await _db.setSetting('map_style', style);
  }

  // ── Themes ──────────────────────────────────────────────

  static final _lightTheme = ThemeData(
    colorScheme: ColorScheme.fromSeed(
      seedColor: Colors.blue,
      brightness: Brightness.light,
    ),
    useMaterial3: true,
    brightness: Brightness.light,
  );

  static final _darkTheme = ThemeData(
    colorScheme: ColorScheme.fromSeed(
      seedColor: Colors.blue,
      brightness: Brightness.dark,
    ),
    useMaterial3: true,
    brightness: Brightness.dark,
    scaffoldBackgroundColor: const Color(0xFF121212),
    cardColor: const Color(0xFF1E1E1E),
    appBarTheme: const AppBarTheme(
      backgroundColor: Color(0xFF1E1E1E),
      foregroundColor: Colors.white,
    ),
    bottomSheetTheme: const BottomSheetThemeData(
      backgroundColor: Color(0xFF1E1E1E),
    ),
  );
}