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;
using System.Runtime.InteropServices;

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

		[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 Description { get; set; }

		[Column("layout")]
		public Layout Layout { get; set; }	

		[Column("total_points")]
		public float? Score { get; set; }

		[Column("index")]
		public byte Index { get; set; }

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

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

		// Navigation Properties
		public Assignment? Assignment { get; set; }
		public AssignmentStruct? ParentStruct { get; set;}
		public ICollection<AssignmentStruct> ChildrenGroups { get; set; }
		public ICollection<AssignmentQuestion> AssignmentQuestions { get; set; }


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