using StudentEnrollmentContracts.BindingModels;
using StudentEnrollmentContracts.ViewModels;
using StudentEnrollmentDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace StudentEnrollmentDatabaseImplement.Models
{
	public class Student //: IStudentModel
	{
		[Key]
		public int student_id { get; private set; }
		[Required]
		public string firstname { get; private set; } = string.Empty;
		[Required]
		public string lastname { get; private set; } = string.Empty;
		public string middlename { get; private set; } = string.Empty;
		[Required]
		public string email { get; private set; } = string.Empty;
		[Required]
		public long tin { get; private set; }
		[Required]
		public int exampointsid { get; private set; }
		public virtual ExamPoints ExamPoints { get; private set; }
		private Dictionary<int, ICourseModel>? _StudentCourse = null;
		public Dictionary<int, ICourseModel> StudentCourse
		{
			get
			{
				if (_StudentCourse == null)
				{
					_StudentCourse = Courses.ToDictionary(SC => SC.courseid,
						SC => SC.Course as ICourseModel);
				}
				return _StudentCourse;
			}
		}
		[ForeignKey("StudentId")]
		public virtual List<StudentCourse> Courses { get; set; } = new();
		public static Student? Create(StudentEnrollmentDatabase context,StudentBindingModel model)
		{
			if (model == null)
			{
				return null;
			}
			return new Student()
			{
				student_id = model.Id,
				firstname = model.FirstName,
				lastname = model.LastName,
				middlename = model.MiddleName,
				email = model.Email,
				tin = model.TIN,
				Courses = model.StudentCourse.Select(x => new StudentCourse 
				{
					Course = context.course.First(y => y.course_id == x.Key)
				}
				).ToList(),
			};
		}
		public void Update(StudentBindingModel model)
		{
			if (model == null)
			{
				return;
			}
			firstname = model.FirstName;
			lastname = model.LastName;
			middlename = model.MiddleName;
			tin = model.TIN;
			email = model.Email;
		}

		public StudentViewModel GetViewModel => new()
		{
			Id = student_id,
			FirstName = firstname,
			LastName = lastname,
			MiddleName = middlename,
			TIN = tin,
			Email = email,
			ExamPointsId = exampointsid,
			ExamPoints = ExamPoints.summary,
		};
	}
}