import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:mobile_scanner/mobile_scanner.dart';

class ScanCode extends StatefulWidget {
  const ScanCode({super.key});

  @override
  State<ScanCode> createState() => _ScanCodeState();
}

class _ScanCodeState extends State<ScanCode> {
  Barcode? _barcode;
  MobileScannerController? _controller; // 添加控制器

  Widget _buildBarcode(Barcode? value) {
    if (value == null) {
      return const Text('Scan something!',
          overflow: TextOverflow.fade, style: TextStyle(color: Colors.white));
    }
    return Text(value.displayValue ?? 'No display value.',
        overflow: TextOverflow.fade,
        style: const TextStyle(color: Colors.white));
  }

  bool _isScanCompleted = false; // 添加标志位
  void _handleBarcode(BarcodeCapture barcodes) {
    if (mounted && !_isScanCompleted) {
      setState(() {
        _barcode = barcodes.barcodes.firstOrNull;
        print(_barcode?.displayValue);
        if (_barcode?.displayValue != null) {
          // 关闭页面并返回结果
          _isScanCompleted = true; // 设置标志位为 true
          _controller?.stop(); // 停止扫描
          Future.delayed(const Duration(milliseconds: 500), () {
            Get.back(result: _barcode?.displayValue); // 返回结果
          });
        }
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Scan Code'),
      ),
      body: Stack(
        children: [
          MobileScanner(
              controller: _controller, // 传递控制器
              onDetect: _handleBarcode),
          Align(
            alignment: Alignment.bottomCenter,
            child: Container(
              alignment: Alignment.bottomCenter,
              height: 100,
              padding: const EdgeInsets.all(16),
              decoration: BoxDecoration(
                color: const Color.fromRGBO(0, 0, 0, 0.4),
                borderRadius: BorderRadius.circular(16),
              ),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: [
                  Expanded(
                    child: Center(
                      child: _buildBarcode(_barcode),
                    ),
                  ),
                  IconButton(
                    icon: const Icon(Icons.close, color: Colors.white),
                    onPressed: () {
                      Get.back(); // 手动关闭页面
                    },
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}