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

class PriceInputField extends StatelessWidget {
  final double? value;
  final ValueChanged<double?> onChanged;

  const PriceInputField({
    Key? key,
    required this.value,
    required this.onChanged,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final controller = TextEditingController(
      text: value != null ? value.toString() : '',
    );

    return TextField(
      controller: controller,
      keyboardType: TextInputType.numberWithOptions(decimal: true),
      inputFormatters: [
        FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,2}$')),
      ],
      decoration: InputDecoration(
        labelText: "物品价格",
        hintText: "请输入物品价格",
        border: OutlineInputBorder(),
      ),
      onChanged: (text) {
        final parsed = double.tryParse(text);
        onChanged(parsed);
      },
    );
  }
}