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

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

  @override
  State<BarcodeScannerScreen> createState() => _BarcodeScannerScreenState();
}

class _BarcodeScannerScreenState extends State<BarcodeScannerScreen> {
  final MobileScannerController _controller = MobileScannerController();
  String? _detectedBarcode;

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Сканирование штрихкода'),
        centerTitle: true,
      ),
      body: SafeArea(
        child: Column(
          children: [
            Expanded(
              child: MobileScanner(
                controller: _controller,
                onDetect: (capture) {
                  final List<Barcode> barcodes = capture.barcodes;
                  if (barcodes.isEmpty) return;
                  final rawValue = barcodes.first.rawValue;
                  if (rawValue == null || rawValue == _detectedBarcode) return;
                  setState(() {
                    _detectedBarcode = rawValue;
                  });
                },
              ),
            ),
            Container(
              width: double.infinity,
              padding: const EdgeInsets.all(16),
              decoration: const BoxDecoration(
                color: Color(0xFFF6F6F6),
                borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
              ),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  const Text(
                    'Найденный штрихкод',
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.w500),
                  ),
                  const SizedBox(height: 8),
                  Text(
                    _detectedBarcode ?? 'Наведите камеру на штрихкод',
                    textAlign: TextAlign.center,
                    style: TextStyle(
                      fontSize: 18,
                      fontWeight: FontWeight.w600,
                      color: _detectedBarcode == null ? Colors.grey : Colors.black,
                    ),
                  ),
                  const SizedBox(height: 16),
                  if (_detectedBarcode != null)
                    SizedBox(
                      width: double.infinity,
                      child: ElevatedButton(
                        onPressed: () {
                          Navigator.of(context).pop(_detectedBarcode);
                        },
                        child: const Text('Использовать штрихкод'),
                      ),
                    ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}