using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace BDU.Converters
{
    public class HexConverter : IValueConverter
    {
        // 显示时：int → hex 字符串
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is int i)
                return $"0x{i:X}"; // 例如 255 → 0xFF
            return "0x0";
        }

        // 用户输入时：hex 字符串 → int
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var str = value?.ToString()?.Trim();

            if (string.IsNullOrWhiteSpace(str))
                return 0;

            if (str.StartsWith("0x", StringComparison.OrdinalIgnoreCase))
                str = str.Substring(2);

            if (int.TryParse(str, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out int result))
                return result;

            return 0; // 或 return DependencyProperty.UnsetValue;
        }
    }
}