import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:get/get.dart';
import 'package:vbvs_app/common/util/FitTool.dart';
import 'package:vbvs_app/common/util/MyUtils.dart';
import 'package:vbvs_app/controller/theme_controller/ThemeController.dart';


class NewTopSlideNotification extends StatefulWidget {
  final String text;
  final double fontSize;
  final Color? textColor;
  final double slideOffset;
  final Duration duration;

  const NewTopSlideNotification({
    super.key,
    required this.text,
    required this.fontSize,
    this.textColor,
    required this.slideOffset,
    required this.duration,
  });

  static OverlayEntry? _currentEntry;
  static bool _isShowing = false;

  /// ✅ 不需要传 context
  static void show({
    String text = '操作成功!',
    double fontSize = 16,
    Color? textColor,
    double slideOffset = 300.0,
    Duration duration = const Duration(seconds: 2),
  }) {
    _showInternal(
      text: text,
      fontSize: fontSize,
      textColor: textColor,
      slideOffset: slideOffset,
      duration: duration,
    );
  }

  static void _showInternal({
    required String text,
    required double fontSize,
    Color? textColor,
    required double slideOffset,
    required Duration duration,
  }) {
    // 移除现有弹窗
    _removeCurrentEntry();

    // ✅ 自动获取全局可用的 context
    final context = Get.overlayContext ?? Get.context;
    if (context == null) {
      debugPrint('NewTopSlideNotification: 无法获取有效的上下文');
      return;
    }

    final overlay = Overlay.of(context);
    if (overlay == null) {
      debugPrint('NewTopSlideNotification: 未找到 Overlay');
      return;
    }

    final entry = OverlayEntry(
      builder: (_) => NewTopSlideNotification(
        text: text,
        fontSize: fontSize,
        textColor: textColor,
        slideOffset: slideOffset,
        duration: duration,
      ),
    );

    _currentEntry = entry;
    _isShowing = true;
    overlay.insert(entry);

    // 自动移除
    Future.delayed(duration + const Duration(milliseconds: 500), () {
      _removeCurrentEntry();
    });
  }

  static void _removeCurrentEntry() {
    if (_currentEntry != null && _isShowing) {
      _currentEntry!.remove();
      _currentEntry = null;
      _isShowing = false;
    }
  }

  @override
  State<NewTopSlideNotification> createState() => _TopSlideNotificationState();
}

class _TopSlideNotificationState extends State<NewTopSlideNotification>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<Offset> _animation;
  bool _isAnimating = false;

  @override
  void initState() {
    super.initState();

    _controller = AnimationController(
      duration: const Duration(milliseconds: 300),
      vsync: this,
    );

    SchedulerBinding.instance.addPostFrameCallback((_) {
      _startAnimation();
    });
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();

    final screenHeight = MediaQuery.of(context).size.height;
    final offsetValue = widget.slideOffset / screenHeight;

    _animation = Tween<Offset>(
      begin: const Offset(0, -1),
      end: Offset(0, offsetValue),
    ).animate(CurvedAnimation(
      parent: _controller,
      curve: Curves.easeOut,
      reverseCurve: Curves.easeIn,
    ));
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  Color get _textColor =>
      widget.textColor ?? Get.find<ThemeController>().currentColor.sc2;

  @override
  Widget build(BuildContext context) {
    return Positioned(
      top: 140.rpx,
      left: 0,
      right: 0,
      child: SlideTransition(
        position: _animation,
        child: Material(
          color: stringToColor("#000000").withOpacity(0.8),
          child: Padding(
            padding: EdgeInsets.symmetric(vertical: 20.rpx),
            child: Center(
              child: Text(
                widget.text,
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: widget.fontSize,
                  color: _textColor,
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }

  Future<void> _startAnimation() async {
    if (_isAnimating) return;
    _isAnimating = true;

    try {
      await _controller.forward();
      await Future.delayed(widget.duration);
      if (mounted) {
        await _controller.reverse();
      }
    } finally {
      _isAnimating = false;
    }
  }
}