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

namespace JD.WPF.Converters
{
    public class BoolToVisibilityConverter : IValueConverter
    {
        public Visibility VisibilityWhenNotDisplayed { get; set; }

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (!(value is bool))
                throw new ArgumentException("Converter value must be of type Boolean");
            if (!(parameter is bool))
                throw new ArgumentException("Converter parameter must be of type Boolean");

            bool boolValue = (bool)value;
            bool invertTest = (bool)parameter;
            if (boolValue)
                return invertTest ? Visibility.Visible : VisibilityWhenNotDisplayed;
            else
                return invertTest ? VisibilityWhenNotDisplayed : Visibility.Visible;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (!(value is Visibility))
                throw new ArgumentException("Converter value must be of type System.Windows.Visibility");
            if (!(parameter is bool))
                throw new ArgumentException("Converter parameter must be of type Boolean");

            Visibility visibility = (Visibility)value;
            bool invertTest = (bool)parameter;
            if (visibility == Visibility.Collapsed || visibility == Visibility.Hidden)
                return invertTest ? false : true;
            else
                return invertTest ? true : false;
        }
    }
}