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 EnumToItemsSourceConverter : IValueConverter
    {
        public class EnumValue
        {
            public Object Value { get; set; }
            public String DisplayName { get; set; }

            public override string ToString()
            {
                return DisplayName;
            }
        }

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            Type result = value as Type;

            if (parameter != null && parameter.ToString() == "false")
            {
                return Enum.GetValues(result);
            }
            else
            {
                return Enum.GetValues(result).Cast<object>().Select(e => new EnumValue() { Value = e, DisplayName = (e as Enum).ToDescription() }).ToList();
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if(value is EnumValue)
            {
                return (value as EnumValue).Value;
            }
            return value;
        }
    }
}