using System;
using System.Collections;
using System.Windows;
using System.Windows.Data;

namespace DTS.Common.Converters
{
    /// <summary>
    /// simple converter that converts array or lists so visible or hidden
    /// </summary>
    public class ArrayVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (null == value) { return Visibility.Hidden; }
            if (value is IList list) { return list.Count > 0 ? Visibility.Visible : Visibility.Collapsed; }

            if (value is Array array)
            {
                return array.Length > 0 ? Visibility.Visible : Visibility.Collapsed;
            }

            return Visibility.Visible;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return null;
        }
    }
}