using System;
using System.Text;

namespace JD.Core
{
    public static class TimeSpanExtensions
    {
        public static string ToReadableString(this TimeSpan _this)
        {
            var time = new StringBuilder();
            var needSpace = false;

            if (_this.Days > 0)
            {
                time.AppendFormat("{0}d ", _this.Days);
                needSpace = true;
            }


            if (_this.Hours > 0)
            {
                time.AppendFormat(needSpace ? " {0}h" : "{0}h", _this.Hours);
                needSpace = true;
            }

            if (_this.Minutes > 0)
            {
                time.AppendFormat(needSpace ? " {0}m" : "{0}m", _this.Minutes);
                needSpace = true;
            }

            if (_this.Seconds > 0)
            {
                time.AppendFormat(needSpace ? " {0}s" : "{0}s", _this.Seconds);
                needSpace = true;
            }

            time.AppendFormat(needSpace ? " {0}ms" : "{0}ms", _this.Milliseconds);

            return time.ToString();
        }
    }
}