using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Sleis.Models
{
    public class SimpleTimeSpan 
    {
         
        public virtual DateTime? StartsOn { get; set; }
        public virtual DateTime? EndsOn { get; set; }

        public SimpleTimeSpan()
        {
            //StartsOn = DateTime.MinValue;
            //EndsOn = DateTime.MaxValue;
        }
        public SimpleTimeSpan(DateTime start, DateTime end)
        {
            StartsOn = start;
            EndsOn = end;
        }
        public SimpleTimeSpan(DateTime start, string end)
        {
            StartsOn = start;
            if (!String.IsNullOrEmpty(end))
            {
                EndsOn = Convert.ToDateTime(end);
            }
        }
        public SimpleTimeSpan(string start, string end)
        {
            if(!String.IsNullOrEmpty(start) && !String.IsNullOrEmpty(end))
            {
                StartsOn = Convert.ToDateTime(start);
                EndsOn = Convert.ToDateTime(end);
            }
        }

        public int Days
        {
            get
            {
                if (StartsOn!= null && EndsOn != null)
                {
                    return GetDays(this.StartsOn.Value, this.EndsOn.Value);
                }
                return 0;
            }
        }
        /// <summary>
        /// Calculates a timespan in days.  Assumes that All spans start on at least 1.
        /// </summary>
        /// <param name="start"></param>
        /// <param name="end"></param>
        /// <returns></returns>
        public static int GetDays(DateTime start, DateTime end)
        {
            //int numOfDays = 0;
            TimeSpan ts = new TimeSpan();
            if (end == null || end == DateTime.MinValue || end > DateTime.Now)
            {
                ts = DateTime.Now - start;
            }
            else if (start > DateTime.MinValue && start < DateTime.MaxValue)
            {
                ts = end - start;
            }
            return Convert.ToInt32(Math.Floor(ts.TotalDays) + 1);
            //return 1 if perfect 0. otherwise all other numbers will be adjusted by the ceiling 
            //return numOfDays == 0 ? 1 : numOfDays;
        }

    }
}