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 StringToOneLineConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value != null)
            {
                string str = value.ToString();
                int newLineIndex = str.IndexOf("\n");

                if (newLineIndex == -1)
                {
                    newLineIndex = str.IndexOf(Environment.NewLine);
                }

                string firstline = str;

                if (newLineIndex > 0)
                {
                    firstline = str.Substring(0, newLineIndex);
                }

                if (parameter != null)
                {
                    firstline = firstline.Ellipsis(System.Convert.ToInt32(parameter));
                }

                return firstline.Trim();
            }
            else
            {
                return value;
            }
        }

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