using System;
using System.Globalization;
using Avalonia.Data.Converters;
using XSDVisualiser.Models;

namespace XSDVisualiser.Desktop.Converters
{
    public class CardinalityToLabelConverter : IValueConverter
    {
        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value is not Occurs occ) return null;
            
            var min = occ.Min;
            var max = occ.MaxIsUnbounded ? "*" : occ.Max.ToString(culture);
            return $"[{min}..{max}]";
        }

        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
            => throw new NotSupportedException();
    }
}