ChickenFarm/UI/CF.APP/chicken_farm/lib/components/vb_rfid_field.dart

import 'package:flutter/material.dart';
import 'package:chicken_farm/core/services/pda/rfid_manager.dart';
import 'package:chicken_farm/core/utils/toast.dart';

/// RFID字段组件，支持单个或多个RFID显示
///
/// 当[multiple]为true时，显示已扫描的RFID数量
/// 当[multiple]为false时，显示单个RFID的具体值
class VberRfidField extends StatefulWidget {
  final List<String>? rfids;
  final String? rfid;
  final ValueChanged<String>? onRfidScanned; // RFID扫描成功回调
  final bool multiple;
  final ValueChanged<int>? onDeleteRfid; // 仅在multiple模式下使用
  final String label; // 显示的标签文本
  final String placeholder; // 未扫描时显示的占位符文本
  final String multiplePlaceholder; // 多个模式下未扫描时显示的占位符文本
  final String multipleFormat; // 多个模式下有值时的显示格式，包含一个%d占位符表示数量

  const VberRfidField({
    super.key,
    this.rfids,
    this.rfid,
    this.onRfidScanned,
    this.multiple = false,
    this.onDeleteRfid,
    this.label = '电子编号',
    this.placeholder = '未扫描',
    this.multiplePlaceholder = '未扫描',
    this.multipleFormat = '已扫描 %d 只鸡',
  });

  @override
  State<VberRfidField> createState() => _VberRfidFieldState();
}

class _VberRfidFieldState extends State<VberRfidField> {
  late final RfidManager _rfidManager;
  bool _isScanning = false; // 内部管理扫描状态

  @override
  void initState() {
    super.initState();
    _rfidManager = RfidManager(_handleRfidScanned, null);
    _rfidManager.initRfid();
  }

  @override
  void dispose() {
    _rfidManager.disposeRfid();
    super.dispose();
  }

  void _handleRfidScanned(String rfid) {
    setState(() {
      _isScanning = false;
    });
    if (widget.onRfidScanned != null) {
      widget.onRfidScanned!(rfid);
    }
  }

  void _scanRfid() {
    setState(() {
      _isScanning = true;
    });
    ToastUtil.success('开始扫描RFID');
    _rfidManager.startScan();
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(widget.label, style: const TextStyle(fontWeight: FontWeight.bold)),
        const SizedBox(height: 10),
        Container(
          padding: const EdgeInsets.fromLTRB(16, 2, 16, 2),
          decoration: BoxDecoration(
            border: Border.all(color: Colors.grey),
            borderRadius: BorderRadius.circular(8),
          ),
          child: Row(
            children: [
              Expanded(
                child: Text(
                  _getDisplayText(),
                  style: TextStyle(
                    color: _hasValue() ? Colors.black : Colors.grey,
                    fontSize: 16,
                  ),
                ),
              ),
              IconButton(
                icon: _isScanning
                    ? const SizedBox(
                        width: 20,
                        height: 20,
                        child: CircularProgressIndicator(strokeWidth: 2),
                      )
                    : Icon(
                        widget.multiple ? Icons.add : Icons.qr_code_scanner,
                        size: 20,
                      ),
                onPressed: _isScanning ? null : _scanRfid,
              ),
            ],
          ),
        ),
      ],
    );
  }

  /// 获取显示的文本
  String _getDisplayText() {
    if (widget.multiple) {
      if (widget.rfids == null || widget.rfids!.isEmpty) {
        return widget.multiplePlaceholder;
      } else {
        return widget.multipleFormat.replaceAll(
          '%d',
          widget.rfids!.length.toString(),
        );
      }
    } else {
      return widget.rfid ?? widget.placeholder;
    }
  }

  /// 判断是否有值
  bool _hasValue() {
    if (widget.multiple) {
      return widget.rfids != null && widget.rfids!.isNotEmpty;
    } else {
      return widget.rfid != null;
    }
  }
}