using SchoolScheduleContracts.BindingModels;
using SchoolScheduleContracts.ViewModels;
using SchoolScheduleDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SchoolScheduleDataBaseImplement.Models
{
	public class Grade : IGradeModel
	{
		public int Id { get; private set; }
		[Required]
		public int Year { get; private set; }
		[Required]
		public char Letter { get; private set; }
		[Required]
		public int TeacherId { get; private set; }
		[ForeignKey("GradeId")]
		public virtual List<Student> Students { get; set; } =
new();
		[ForeignKey("GradeId")]
		public virtual List<Lesson> Lessons { get; set; } =
new();
		public virtual Teacher Teacher { get; set; } = new();
		public static Grade? Create(SchoolScheduleDataBase context, GradeBindingModel model)
		{
			if (model == null)
			{
				return null;
			}
			return new Grade()
			{
				Id = model.Id,
				Year = model.Year,
				TeacherId = model.TeacherId,
				Teacher = context.Teachers.First(y => y.Id == model.TeacherId),
				Letter = model.Letter
			};
		}
		public void Update(SchoolScheduleDataBase context, GradeBindingModel model)
		{
			if (model == null)
			{
				return;
			}
			Year = model.Year;
			Letter = model.Letter;
			TeacherId = model.TeacherId;
			Teacher = context.Teachers.First(x => x.Id == TeacherId);
		}
		public GradeViewModel GetViewModel => new()
		{
			Id = Id,
			Year = Year,
			Letter = Letter,
			TeacherId = TeacherId,
			TeacherFullName = Teacher.FullName,
			FullName = Year.ToString() + Letter.ToString(),
		};

	}
}