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

namespace Gestor.Common.Converters
{
	public class ZeroToEmptyConverter : MarkupExtension, IValueConverter
	{
		public ZeroToEmptyConverter()
		{
		}

		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value == null)
			{
				return "";
			}
			if (value is string)
			{
				return value;
			}
			if (Math.Abs(Convert.ToDouble(value)) < 0.01)
			{
				return "";
			}
			return value.ToString();
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			return (value == null || string.IsNullOrEmpty(value.ToString()) ? 0 : int.Parse(value.ToString()));
		}

		public override object ProvideValue(IServiceProvider serviceProvider)
		{
			return this;
		}
	}
}