using System;

namespace Wcm.PublicWeb.Skeleton.Wip.Campaign.Templates
{
	public class PrettyDate
	{
		public string TextJustNow { get; set; }
		public string TextOneMinuteAgo { get; set; }
		public string TextMinutesAgo { get; set; }
		public string TextOneHourAgo { get; set; }
		public string TextHoursAgo { get; set; }
		public string TextYesterDay { get; set; }
		public string TextDaysAgo { get; set; }
		public string TextWeeksAgo { get; set; }

		public PrettyDate()
		{
			this.TextJustNow = "just now";
			this.TextOneMinuteAgo = "1 minute ago";
			this.TextMinutesAgo = "{0} minutes ago";
			this.TextHoursAgo = "{0} hours ago";
			this.TextOneHourAgo = "1 hour ago";
			this.TextYesterDay = "yesterday";
			this.TextDaysAgo = "{0} days ago";
			this.TextWeeksAgo = "{0} weeks ago";
		}

		public string GetPrettyDate(DateTime d)
		{

			var s = DateTime.Now.Subtract(d);
			var dayDiff = (int)s.TotalDays;
			var secDiff = (int)s.TotalSeconds;

			if (dayDiff == 0)
			{
				// Less than one minute ago.
				if (secDiff < 60)
				{
					return this.TextJustNow;
				}

				// Less than 2 minutes ago.
				if (secDiff < 120)
				{
					return this.TextOneMinuteAgo;
				}

				// Less than one hour ago.
				if (secDiff < 3600)
				{
					return string.Format(this.TextMinutesAgo, Math.Floor((double)secDiff / 60));
				}

				// Less than 2 hours ago.
				if (secDiff < 7200)
				{
					return this.TextOneHourAgo;
				}

				// Less than one day ago.
				if (secDiff < 86400)
				{
					return string.Format(this.TextHoursAgo, Math.Floor((double)secDiff / 3600));
				}
			}

			// Handle previous days.
			if (dayDiff == 1)
			{
				return this.TextYesterDay;
			}

			if (dayDiff < 7)
			{
				return string.Format(this.TextDaysAgo, dayDiff);
			}

			return string.Format(this.TextWeeksAgo, Math.Ceiling((double)dayDiff / 7));
		}
	}
}