using StudentPerformanceContracts.BindingModels;
using StudentPerformanceContracts.ViewModels;
using StudentPerformanceDataModels.Models;

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

namespace StudentPerformanceDatabaseImplement.Models
{
    public class Students : IStudentModel
    {
        [Required]
        public string Fullname { get; set; } = string.Empty;

        // Средний балл по сесии (не более 6 сессий) 
        public List<string> AverageScore { get; set; } = new List<string>();

        public int Id { get; private set; }

        public int FormatId { get; set; }
        public virtual Formats Format { get; set; } = new();

        public DateTime AdmissionDate { get; set; }

        public static Students? Create(StudentsDatabase context, StudentBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }
            return new Students()
            {
                Id = model.Id,
                Fullname = model.Fullname,
                Format = context.Formats.First(x => x.Id == model.FormatId),
                AverageScore = model.AverageScore,
                AdmissionDate = model.AdmissionDate.ToUniversalTime()
            };
        }

        public void Update(StudentBindingModel? model, StudentsDatabase context)
        {
            if (model == null)
            {
                return;
            }
            Fullname = model.Fullname;
            Format = context.Formats.First(x => x.Id == model.Id);
            AverageScore = model.AverageScore.ToList();
            AdmissionDate = model.AdmissionDate.ToUniversalTime();
        }

        public StudentViewModel GetViewModel => new()
        {
            Id = Id,
            Fullname = Fullname,
            FormatId = Format.Id,
            Format = Format.Name,
            AverageScore = AverageScore,
            AdmissionDate = AdmissionDate,
        };
    }
}