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

namespace DTS.Common.Converters
{
    public class VisibilityToRowHeightConverter : DependencyObject, IValueConverter
    {
        /// <summary>
        /// inverts the source prior to conversion
        /// </summary>
        public bool InvertSource
        {
            get => (bool)GetValue(InvertSourceProperty);
            set => SetValue(InvertSourceProperty, value);
        }
        public static readonly DependencyProperty InvertSourceProperty =
            DependencyProperty.Register("InvertSource", typeof(bool), typeof(VisibilityToRowHeightConverter), new PropertyMetadata(false));

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is Visibility vis)
            {
                if (InvertSource)
                {
                    switch (vis)
                    {
                        case Visibility.Visible:
                            vis = Visibility.Collapsed;
                            break;
                        case Visibility.Hidden:
                        case Visibility.Collapsed:
                            vis = Visibility.Visible;
                            break;
                    }
                }
                if (vis == Visibility.Collapsed)
                {
                    return 0;
                }
            }

            //return parameter;
            return parameter ?? 0;
        }

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