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

namespace Tango.SharedUI.Converters
{
    public class MathOperatorConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            String arguments = parameter.ToStringSafe();

            if (arguments != null && value != null)
            {
                String sign = arguments.First().ToString();
                double a = System.Convert.ToDouble(value);
                double b = System.Convert.ToDouble(new String(arguments.Skip(1).ToArray()));


                switch (sign)
                {
                    case "+":
                        return a + b;
                    case "-":
                        return a - b;
                    case "*":
                        return a * b;
                    case "/":
                        return a / b;
                }
            }

            return null;
        }

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