using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using Kreta.Ellenorzo.Enums.VN;

namespace Kreta.Ellenorzo.Domain.VN.Common
{
    public class DateTimeIntervalRequest : IValidatableObject
    {
        private DateTime? _toDate;

        public DateTimeIntervalRequest(DefaultInterval defaultInterval)
        {
            switch (defaultInterval)
            {
                case DefaultInterval.AktivTanev:
                    FromDate = null;
                    _toDate = null;
                    break;
                case DefaultInterval.None:
                default:
                    break;
            }
        }

        public DateTimeIntervalRequest(DefaultInterval defaultInterval, DateTime? fromDate, DateTime? toDate) : this(defaultInterval)
        {
            if (fromDate.HasValue || toDate.HasValue)
            {
                FromDate = fromDate;
                ToDate = toDate;
            }
        }

        public DateTime? FromDate { get; private set; }

        public DateTime? ToDate { get => _toDate?.Date.AddDays(1).AddSeconds(-1); private set => _toDate = value; }

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if (FromDate > ToDate)
            {
                yield return new ValidationResult("ToDateMustBeGreaterOrEqualThanFromDate");
            }
        }
    }
}