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

namespace AIDiagnosisDemo.Extensions
{
    [MarkupExtensionReturnType(typeof(IValueConverter))]
    public class BoolToVisibilityConverterExtension : MarkupExtension
    {
        [ThreadStatic]
        private static BoolToVisibilityConverter _converter;

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return _converter ?? (_converter = new BoolToVisibilityConverter());
        }

        private class BoolToVisibilityConverter : IValueConverter
        {
            public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
            {
                var converterParameter = parameter?.ToString();
                if (value == null)
                {
                    return converterParameter == "Reverse" ? Visibility.Collapsed : Visibility.Visible;
                }

                if ((bool)value)
                {
                    return converterParameter == "Reverse" ? Visibility.Collapsed : Visibility.Visible;
                }

                return converterParameter == "Reverse" ? Visibility.Visible : Visibility.Collapsed;
            }

            public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
            {
                var converterParameter = parameter?.ToString();
                if (value == null)
                {
                    return Visibility.Visible;
                }

                if ((Visibility)value == Visibility.Visible)
                {
                    return converterParameter == "Reverse" ? false : true;
                }

                return converterParameter == "Reverse" ? true : false;
            }
        }
    }
}