using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Entities.Contracts
{
	[Table("assignment_group")]
	public class AssignmentGroup
	{
		[Key]
		[Column("id")]
		public Guid Id { get; set; }

		[Required]
		[Column("assignment")]
		[ForeignKey("Assignment")]
		public Guid AssignmentId { get; set; }

		[Required]
		[Column("title")]
		[MaxLength(65535)] 
		public string Title { get; set; }

		[Column("descript")]
		[MaxLength(65535)] 
		public string Descript { get; set; }


		[Column("total_points")]
		public decimal? TotalPoints { get; set; }

		[Column("number")]
		public byte Number { get; set; }

		[Column("parent_group")]
		public Guid? ParentGroup { get; set; }

		[Column("deleted")]
		public bool IsDeleted { get; set; }

		// Navigation Properties
		public Assignment Assignment { get; set; }
		public AssignmentGroup ParentAssignmentGroup { get; set;}
		public ICollection<AssignmentGroup> ChildAssignmentGroups { get; set; }
		public ICollection<AssignmentQuestion> AssignmentQuestions { get; set; }


		public AssignmentGroup()
		{
			Id = Guid.NewGuid();
			ChildAssignmentGroups = new HashSet<AssignmentGroup>();
			AssignmentQuestions = new HashSet<AssignmentQuestion>();
		}
	}
}