// 时间: 2026-04-02
// 功能: Tap沉浸光感导航栏控制器
// 介绍: 管理液态玻璃导航栏的开关状态和透明度级别
// 最新变化: 添加透明度级别控制（弱、中、强）

import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../../config/app_config.dart';

/// 透明度级别枚举
enum TransparencyLevel {
  weak, // 弱 - 当前效果
  medium, // 中 - 中等透明度
  strong, // 强 - 几乎透明
}

class TapLiquidGlassController extends GetxController {
  SharedPreferences? _prefs;
  final _isEnabled = true.obs;
  final _transparencyLevel = TransparencyLevel.weak.obs;

  bool get isEnabled => _isEnabled.value;
  RxBool get isEnabledRx => _isEnabled;
  TransparencyLevel get transparencyLevel => _transparencyLevel.value;
  Rx<TransparencyLevel> get transparencyLevelRx => _transparencyLevel;

  /// 获取透明度级别的索引（用于视图层）
  int get transparencyLevelIndex => _transparencyLevel.value.index;

  /// 获取透明度配置
  /// 返回整体背景透明度
  Map<String, double> get transparencyValues {
    switch (_transparencyLevel.value) {
      case TransparencyLevel.weak:
        return {'backgroundOpacity': 0.5};
      case TransparencyLevel.medium:
        return {'backgroundOpacity': 0.2};
      case TransparencyLevel.strong:
        return {'backgroundOpacity': 0.01};
    }
  }

  /// 获取透明度级别的中文名称
  String get transparencyLevelLabel {
    switch (_transparencyLevel.value) {
      case TransparencyLevel.weak:
        return '弱';
      case TransparencyLevel.medium:
        return '中';
      case TransparencyLevel.strong:
        return '强';
    }
  }

  /// 通过索引设置透明度级别
  Future<void> setTransparencyLevelByIndex(int index) async {
    final level = TransparencyLevel
        .values[index.clamp(0, TransparencyLevel.values.length - 1)];
    await setTransparencyLevel(level);
  }

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

  Future<void> _loadSettings() async {
    _prefs = await SharedPreferences.getInstance();
    _isEnabled.value = _prefs?.getBool(AppConfig.keyTapLiquidGlass) ?? true;
    final levelIndex = _prefs?.getInt('tap_liquid_glass_transparency') ?? 0;
    _transparencyLevel.value = TransparencyLevel
        .values[levelIndex.clamp(0, TransparencyLevel.values.length - 1)];
  }

  Future<void> toggleEnabled(bool enabled) async {
    if (_isEnabled.value == enabled) return;
    _isEnabled.value = enabled;
    _prefs ??= await SharedPreferences.getInstance();
    await _prefs?.setBool(AppConfig.keyTapLiquidGlass, enabled);
  }

  Future<void> setTransparencyLevel(TransparencyLevel level) async {
    if (_transparencyLevel.value == level) return;
    _transparencyLevel.value = level;
    _prefs ??= await SharedPreferences.getInstance();
    await _prefs?.setInt('tap_liquid_glass_transparency', level.index);
  }
}