import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'dart:math';
import 'dart:async';

import 'package:yumi/ui_kit/widgets/headdress/headdress_widget.dart';
import 'package:yumi/ui_kit/widgets/room/anim/room_entrance_widget.dart';

// 红包数据模型
class RedPacket {
  double x; // x坐标
  double y; // y坐标
  double speed; // 下落速度
  double size; // 大小
  double rotation; // 旋转角度
  double rotationSpeed; // 旋转速度
  Color color; // 红包颜色
  bool isCollected; // 是否被收集
  String id; // 唯一标识符

  RedPacket({
    required this.x,
    required this.y,
    required this.speed,
    required this.size,
    required this.rotation,
    required this.rotationSpeed,
    required this.color,
    this.isCollected = false,
    required this.id,
  });
}

class RedPacketRainPage extends StatefulWidget {
  @override
  _RedPacketRainPageState createState() => _RedPacketRainPageState();
}

class _RedPacketRainPageState extends State<RedPacketRainPage>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  final Random _random = Random();
  final List<RedPacket> _redPackets = [];
  final int _maxPackets = 50;
  DateTime? _startTime;
  int _durationSeconds = 30;
  int _collectedCount = 0;

  final List<Color> _redColors = [
    Colors.red[400]!,
    Colors.red[500]!,
    Colors.red[600]!,
    Colors.red[700]!,
    Colors.red[800]!,
    Colors.red[900]!,
  ];

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: Duration(milliseconds: 350),
    )..addListener(_updateRain);

    _startRain();

    Future.delayed(Duration(seconds: 3),(){
      RoomEntranceQueueManager().addToQueue(AnimationQueueItem(resource: "sc_images/room/entrance/test3.svga",dynamicData: {"textReplacements":{"02":"3123123"}}));
    });
  }

  void _startRain() {
    _startTime = DateTime.now();
    _collectedCount = 0;
    _redPackets.clear();
    _controller.repeat();

    Timer(Duration(seconds: _durationSeconds), () {
      if (mounted) {
        _controller.stop();
      }
    });
  }

  void _updateRain() {
    if (!mounted) return;

    final screenWidth = MediaQuery.of(context).size.width;
    final screenHeight = MediaQuery.of(context).size.height;

    // 随机生成新红包
    if (_redPackets.length < _maxPackets && _random.nextDouble() < 0.3) {
      _createNewPacket(screenWidth, screenHeight);
    }

    // 更新现有红包位置
    for (int i = _redPackets.length - 1; i >= 0; i--) {
      final packet = _redPackets[i];

      if (!packet.isCollected) {
        packet.y += packet.speed;
        packet.rotation += packet.rotationSpeed;

        if (packet.y > screenHeight + 100) {
          _redPackets.removeAt(i);
          continue;
        }
      }
    }

    setState(() {});
  }

  void _createNewPacket(double screenWidth, double screenHeight) {
    _redPackets.add(
      RedPacket(
        x: _random.nextDouble() * screenWidth,
        y: -50,
        speed: 2 + _random.nextDouble() * 3,
        size: 30 + _random.nextDouble() * 20,
        rotation: _random.nextDouble() * 2 * pi,
        rotationSpeed: (_random.nextDouble() - 0.5) * 0.1,
        color: _redColors[_random.nextInt(_redColors.length)],
        id: '${DateTime.now().millisecondsSinceEpoch}_${_random.nextInt(1000)}',
      ),
    );
  }

  void _collectPacket(String packetId) {
    final packetIndex = _redPackets.indexWhere(
      (packet) => packet.id == packetId,
    );

    if (packetIndex != -1 && !_redPackets[packetIndex].isCollected) {
      setState(() {
        _redPackets[packetIndex].isCollected = true;
        _collectedCount++;
      });

      // 收集动画效果
      Future.delayed(Duration(milliseconds: 350), () {
        if (mounted) {
          setState(() {
            _redPackets.removeWhere((packet) => packet.id == packetId);
          });
        }
      });
    }
  }

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

  @override
  Widget build(BuildContext context) {
    final remainingTime =
        _startTime != null
            ? max(
              0,
              _durationSeconds -
                  DateTime.now().difference(_startTime!).inSeconds,
            )
            : _durationSeconds;

    return Scaffold(
      backgroundColor: Colors.black,
      body: RoomEntranceWidget(
        height: 90.w,
      ),
    );
  }

  void _handleTap(Offset position) {
    // 从后往前遍历，这样点击检测会优先处理最上层的红包（最后绘制的）
    for (int i = _redPackets.length - 1; i >= 0; i--) {
      final packet = _redPackets[i];
      if (!packet.isCollected && _isPointInRedPacket(position, packet)) {
        _collectPacket(packet.id);
        break; // 只处理最上层的一个红包
      }
    }
  }

  bool _isPointInRedPacket(Offset point, RedPacket packet) {
    // 简化的点击区域检测 - 圆形区域
    final distance = sqrt(
      pow(point.dx - packet.x, 2) + pow(point.dy - packet.y, 2),
    );
    return distance < packet.size;
  }

  Widget _buildInfoCard(String title, String value) {
    return Container(
      padding: EdgeInsets.symmetric(horizontal: 12, vertical: 6),
      decoration: BoxDecoration(
        color: Colors.black54,
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: Colors.red),
      ),
      child: Column(
        children: [
          Text(title, style: TextStyle(color: Colors.white, fontSize: 10)),
          Text(
            value,
            style: TextStyle(
              color: Colors.red,
              fontSize: 14,
              fontWeight: FontWeight.bold,
            ),
          ),
        ],
      ),
    );
  }
}

class RedPacketPainter extends CustomPainter {
  final List<RedPacket> redPackets;

  RedPacketPainter({required this.redPackets});

  @override
  void paint(Canvas canvas, Size size) {
    final textPainter = TextPainter(textDirection: TextDirection.ltr);

    for (final packet in redPackets) {
      if (packet.isCollected) {
        _drawCollectedPacket(canvas, packet);
      } else {
        _drawRedPacket(canvas, packet, textPainter);
      }
    }
  }

  void _drawRedPacket(
    Canvas canvas,
    RedPacket packet,
    TextPainter textPainter,
  ) {
    canvas.save();
    canvas.translate(packet.x, packet.y);
    canvas.rotate(packet.rotation);

    // 绘制红包主体
    final packetPaint =
        Paint()
          ..color = packet.color
          ..style = PaintingStyle.fill;

    final rect = Rect.fromCenter(
      center: Offset.zero,
      width: packet.size,
      height: packet.size * 1.5,
    );

    final rrect = RRect.fromRectAndRadius(rect, Radius.circular(8));
    canvas.drawRRect(rrect, packetPaint);

    // 红包中间的黄色条纹
    final stripePaint =
        Paint()
          ..color = Colors.yellow[700]!
          ..style = PaintingStyle.fill;

    final stripeRect = Rect.fromCenter(
      center: Offset.zero,
      width: packet.size * 0.8,
      height: packet.size * 0.2,
    );
    canvas.drawRRect(
      RRect.fromRectAndRadius(stripeRect, Radius.circular(4)),
      stripePaint,
    );

    // 红包文字
    textPainter.text = TextSpan(
      text: '福',
      style: TextStyle(
        color: Colors.yellow[700],
        fontSize: packet.size * 0.4,
        fontWeight: FontWeight.bold,
      ),
    );
    textPainter.layout();
    textPainter.paint(
      canvas,
      Offset(-textPainter.width / 2, -textPainter.height / 2),
    );

    canvas.restore();
  }

  void _drawCollectedPacket(Canvas canvas, RedPacket packet) {
    final progress = (DateTime.now().millisecondsSinceEpoch % 300) / 300;
    final scale = 1.0 - progress;
    final opacity = 1.0 - progress;

    canvas.save();
    canvas.translate(packet.x, packet.y);
    canvas.scale(scale);

    final packetPaint =
        Paint()
          ..color = packet.color.withOpacity(opacity)
          ..style = PaintingStyle.fill;

    final rect = Rect.fromCenter(
      center: Offset.zero,
      width: packet.size,
      height: packet.size * 1.5,
    );

    final rrect = RRect.fromRectAndRadius(rect, Radius.circular(8));
    canvas.drawRRect(rrect, packetPaint);

    canvas.restore();
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => true;
}