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

namespace Aitex.Sorter.UI.Converter
{
	public class WaferIDConverter : IMultiValueConverter
	{
		public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
		{
			if (values[0] == null || values[0] == DependencyProperty.UnsetValue || values[1] == null || values[1] == DependencyProperty.UnsetValue)
			{
				return -1;
			}

			var obj = values[0];
			var collection = (Array)values[1];
			var index = collection.Length - Array.IndexOf(collection, obj) - 1;
			if (targetType == typeof(int))
			{
				return index;
			}
			else if (targetType == typeof(string))
			{
				return (index + 1).ToString();
			}
			return index;
		}

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