using Avalonia.Data.Converters;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Plugin.Cowain.Driver.Converters;


/// <summary>
/// 将多选集合拼接为字符串（如："系统, 设备"）
/// </summary>
public class ListToJoinedStringConverter : IValueConverter
{
    public object Convert(object? value, Type targetType, object? parameter, System.Globalization.CultureInfo culture)
    {
        // 参数：分隔符（默认逗号+空格）
        string separator = parameter as string ?? ", ";

        // 空值处理
        if (value is not IEnumerable<object> list || !list.Any())
        {
            return "请选择"; // 占位提示
        }
        // 拼接选中项的Name属性
        return string.Join(separator, list
            .Where(item => item != null)
            .Select(item => item.GetType().GetProperty("Name")?.GetValue(item)?.ToString() ?? string.Empty)
            .Where(name => !string.IsNullOrEmpty(name)));
    }

    public object ConvertBack(object? value, Type targetType, object? parameter, System.Globalization.CultureInfo culture)
    {
        // 无需反向转换
        return Avalonia.Data.BindingOperations.DoNothing;
    }
}