using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Wox.Plugin.QueryHistory
{
    public class HistoryItem
    {
        public string Query { get; set; }
        public DateTime ExecutedDateTime { get; set; }

        public string GetTimeAgo()
        {
            return DateTimeAgo(ExecutedDateTime);
        }

        private string DateTimeAgo(DateTime dt)
        {
            TimeSpan span = DateTime.Now - dt;
            if (span.Days > 365)
            {
                int years = (span.Days / 365);
                if (span.Days % 365 != 0)
                    years += 1;
                return String.Format("about {0} {1} ago",
                years, years == 1 ? "year" : "years");
            }
            if (span.Days > 30)
            {
                int months = (span.Days / 30);
                if (span.Days % 31 != 0)
                    months += 1;
                return String.Format("about {0} {1} ago",
                months, months == 1 ? "month" : "months");
            }
            if (span.Days > 0)
                return String.Format("about {0} {1} ago",
                span.Days, span.Days == 1 ? "day" : "days");
            if (span.Hours > 0)
                return String.Format("about {0} {1} ago",
                span.Hours, span.Hours == 1 ? "hour" : "hours");
            if (span.Minutes > 0)
                return String.Format("about {0} {1} ago",
                span.Minutes, span.Minutes == 1 ? "minute" : "minutes");
            if (span.Seconds > 5)
                return String.Format("about {0} seconds ago", span.Seconds);
            if (span.Seconds <= 5)
                return "just now";
            return string.Empty;
        }
    }
}