using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace TeamsISO.App.Converters;

/// <summary>
/// Tiny utility converter — null or empty string ⇒ Collapsed, otherwise
/// Visible. Used by the v2 command palette's optional shortcut chip
/// (e.g. "Ctrl+R") so rows without a bound shortcut don't render the
/// empty pill outline.
/// </summary>
public sealed class NullToCollapsedConverter : IValueConverter
{
    public object Convert(object value, System.Type targetType, object parameter, CultureInfo culture)
    {
        if (value is null) return Visibility.Collapsed;
        if (value is string s && string.IsNullOrEmpty(s)) return Visibility.Collapsed;
        return Visibility.Visible;
    }

    public object ConvertBack(object value, System.Type targetType, object parameter, CultureInfo culture) =>
        System.Windows.Data.Binding.DoNothing;
}