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

class ThemeProvider with ChangeNotifier {
  static const String _themeModeKey = 'user_theme_mode';
  static const String _accentKey = 'user_accent_color';

  ThemeMode _themeMode = ThemeMode.system;
  AppAccentColor _accent = AppAccentColor.blue;

  ThemeMode get themeMode => _themeMode;
  AppAccentColor get currentAccent => _accent;
  Color get primaryColor => _accent.color;

  ThemeData get lightTheme => AppTheme.buildLightTheme(_accent);
  ThemeData get darkTheme => AppTheme.buildDarkTheme(_accent);

  ThemeProvider() {
    loadSettings();
  }

  Future<void> loadSettings() async {
    final prefs = await SharedPreferences.getInstance();
    final modeIndex = prefs.getInt(_themeModeKey);
    final accentId = prefs.getString(_accentKey);

    if (modeIndex != null) {
      _themeMode = ThemeMode.values[modeIndex];
    }
    if (accentId != null) {
      _accent = AppAccentColor.fromId(accentId);
    }
    notifyListeners();
  }

  Future<void> setThemeMode(ThemeMode mode) async {
    if (_themeMode == mode) return;

    _themeMode = mode;
    notifyListeners();

    final prefs = await SharedPreferences.getInstance();
    await prefs.setInt(_themeModeKey, mode.index);
  }

  Future<void> setAccent(AppAccentColor accent) async {
    if (_accent.id == accent.id) return;

    _accent = accent;
    notifyListeners();

    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(_accentKey, accent.id);
  }

  String get themeModeName {
    switch (_themeMode) {
      case ThemeMode.system:
        return 'Automatique';
      case ThemeMode.light:
        return 'Clair';
      case ThemeMode.dark:
        return 'Sombre';
    }
  }
}