/// 时间: 2026-04-02
/// 功能: 主页设置和控制组件
/// 介绍: 包含收起/恢复悬浮按钮的管理器和组件
/// 最新变化: 2026-04-02 初始创建

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../../../../constants/app_constants.dart';

/// 悬浮按钮收起管理器
class FloatingButtonsVisibilityManager {
  static const String _key = 'floating_buttons_visible';

  static FloatingButtonsVisibilityManager? _instance;
  bool _isVisible = true;
  bool _isFlashing = false;
  int _flashCount = 0;
  final ValueNotifier<bool> _visibleNotifier = ValueNotifier<bool>(true);
  final ValueNotifier<bool> _flashingNotifier = ValueNotifier<bool>(false);
  Timer? _hideTimer;
  Timer? _flashTimer;

  FloatingButtonsVisibilityManager._internal();

  factory FloatingButtonsVisibilityManager() {
    _instance ??= FloatingButtonsVisibilityManager._internal();
    return _instance!;
  }

  Future<void> init() async {
    final prefs = await SharedPreferences.getInstance();
    _isVisible = prefs.getBool(_key) ?? true;
    _visibleNotifier.value = _isVisible;
  }

  bool get isVisible => _isVisible;
  bool get isFlashing => _isFlashing;
  ValueNotifier<bool> get visibleNotifier => _visibleNotifier;
  ValueNotifier<bool> get flashingNotifier => _flashingNotifier;

  Future<void> toggle() async {
    if (_isFlashing) {
      await _restoreFromFlashing();
      return;
    }

    _isVisible = !_isVisible;
    _visibleNotifier.value = _isVisible;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_key, _isVisible);

    if (!_isVisible) {
      _startHideTimer();
    } else {
      _cancelAllTimers();
    }
  }

  Future<void> _restoreFromFlashing() async {
    _cancelAllTimers();
    _isFlashing = false;
    _flashingNotifier.value = false;
    _isVisible = true;
    _visibleNotifier.value = true;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_key, true);
  }

  void _startHideTimer() {
    _cancelAllTimers();
    _hideTimer = Timer(const Duration(seconds: 5), () {
      _startFlashing();
    });
  }

  void _startFlashing() {
    _isFlashing = true;
    _flashingNotifier.value = true;
    _flashCount = 0;
    _flashTimer = Timer.periodic(const Duration(seconds: 1), (timer) async {
      _flashCount++;
      _flashingNotifier.value = !_flashingNotifier.value;

      if (_flashCount >= 6) {
        timer.cancel();
        _isFlashing = false;
        _flashingNotifier.value = false;
        _isVisible = false;
        _visibleNotifier.value = false;
        final prefs = await SharedPreferences.getInstance();
        await prefs.setBool(_key, false);
      }
    });
  }

  void _cancelAllTimers() {
    if (_hideTimer != null) {
      _hideTimer!.cancel();
      _hideTimer = null;
    }
    if (_flashTimer != null) {
      _flashTimer!.cancel();
      _flashTimer = null;
    }
  }

  void dispose() {
    _cancelAllTimers();
    _visibleNotifier.value = true;
    _flashingNotifier.value = false;
  }
}

/// 收起/恢复悬浮按钮组件
class FloatingButtonsToggleButton extends StatelessWidget {
  final FloatingButtonsVisibilityManager manager;
  final bool isDark;

  const FloatingButtonsToggleButton({
    super.key,
    required this.manager,
    required this.isDark,
  });

  @override
  Widget build(BuildContext context) {
    return ValueListenableBuilder<bool>(
      valueListenable: manager.flashingNotifier,
      builder: (context, isFlashing, child) {
        return ValueListenableBuilder<bool>(
          valueListenable: manager.visibleNotifier,
          builder: (context, isVisible, child) {
            final shouldShow = isFlashing ? !isFlashing : isVisible;

            return SizedBox(
              width: 44,
              height: 44,
              child: shouldShow || isFlashing
                  ? Container(
                      decoration: BoxDecoration(
                        color: isDark ? const Color(0xFF2A2A2A) : Colors.white,
                        shape: BoxShape.circle,
                        boxShadow: [
                          BoxShadow(
                            color: Colors.black.withAlpha(isDark ? 40 : 20),
                            blurRadius: 8,
                            offset: const Offset(0, 2),
                          ),
                        ],
                      ),
                      child: Material(
                        color: Colors.transparent,
                        child: InkWell(
                          borderRadius: BorderRadius.circular(22),
                          onTap: () {
                            manager.toggle();
                          },
                          child: Center(
                            child: Icon(
                              isFlashing
                                  ? Icons.visibility
                                  : Icons.visibility_off,
                              color: isFlashing
                                  ? AppConstants.primaryColor
                                  : (isDark
                                        ? Colors.grey[300]
                                        : AppConstants.primaryColor),
                              size: 24,
                            ),
                          ),
                        ),
                      ),
                    )
                  : Material(
                      color: Colors.transparent,
                      child: InkWell(
                        borderRadius: BorderRadius.circular(22),
                        onTap: () {
                          manager.toggle();
                        },
                      ),
                    ),
            );
          },
        );
      },
    );
  }
}