using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Data;
using System.Globalization;
using System.Windows;

namespace SudokuWeek4.Models.Converters
{
    internal class VisibilityValueConverter : IValueConverter
    {
        private static readonly VisibilityValueConverter _instance = new VisibilityValueConverter();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is bool) || targetType != typeof(Visibility))
                throw new InvalidCastException();

            bool visible = (bool)value;
            if (parameter != null)
                visible =! visible;

            if (visible)
                return Visibility.Visible;
            else
                return Visibility.Hidden;
        }

        // Create a property to get the instance of the OptionsValue
        public static VisibilityValueConverter Instance
        {
            get { return _instance; }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}