namespace OINA.Extender.WPF.Testharness
{
    using System;
    using System.Globalization;
    using System.Windows.Data;
    using System.Windows.Markup;

    /// <summary>
    /// Converts between <see cref="TimeSpan"/> and number of milliseconds as a <see cref="string" />.
    /// </summary>
    [ValueConversion(typeof(TimeSpan), typeof(string))]
    public class TimeSpanToStringMillisecondsConverter : IValueConverter
    {
        /// <summary>
        /// Converts a <see cref="TimeSpan"/> to number of milliseconds as a <see cref="string" />.
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            try
            {
                var timeSpan = (TimeSpan)value;
                return timeSpan.TotalMilliseconds.ToString(culture);
            }
            catch
            {
                return 0;
            }
        }

        /// <summary>
        /// Converts number of milliseconds as a <see cref="string" /> to a <see cref="TimeSpan"/>.
        /// </summary>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            try
            {
                var timeSpan = (string)value;
                return TimeSpan.FromMilliseconds(int.Parse(timeSpan, culture));
            }
            catch
            {
                return TimeSpan.Zero;
            }
        }
    }
}