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

namespace Gestor.Common.Converters
{
	public class ComparativoConverter : IMultiValueConverter
	{
		public ComparativoConverter()
		{
		}

		public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
		{
			decimal num;
			decimal num1;
			if (values[0] == null)
			{
				return 0;
			}
			if (values[1] == null)
			{
				return 0;
			}
			num = (!(values[0] is int) ? ((decimal?)values[0]).GetValueOrDefault() : (int)values[0]);
			num1 = (!(values[1] is int) ? ((decimal?)values[1]).GetValueOrDefault() : (int)values[1]);
			if (num == decimal.Zero && num1 == decimal.Zero)
			{
				return 0;
			}
			if (num == decimal.Zero && num1 > decimal.Zero)
			{
				return -1;
			}
			if (num1 == decimal.Zero && num > decimal.Zero)
			{
				return 1;
			}
			if (num == decimal.Zero && num1 < decimal.Zero)
			{
				return 1;
			}
			if (num1 == decimal.Zero && num < decimal.Zero)
			{
				return -1;
			}
			return (num - num1) / (num1 > decimal.Zero ? num1 : -num1);
		}

		public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
		{
			return null;
		}
	}
}