using SchoolScheduleContracts.BindingModels;
using SchoolScheduleContracts.SearchModels;
using SchoolScheduleContracts.StoragesContracts;
using SchoolScheduleContracts.ViewModels;
using SchoolScheduleDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SchoolScheduleDataBaseImplement.Implements
{
	public class SubjectStorage : ISubjectStorage
	{
		public List<SubjectViewModel> GetFullList()
		{
			using var context = new SchoolScheduleDataBase();
			return context.Subjects
			.Select(x => x.GetViewModel)
		   .ToList();
		}
		public List<SubjectViewModel> GetFilteredList(SubjectSearchModel
	   model)
		{
			if (string.IsNullOrEmpty(model.SubjectName))
			{
				return new();
			}
			using var context = new SchoolScheduleDataBase();
			return context.Subjects
			.Where(x => x.SubjectName.Contains(model.SubjectName))
		   .Select(x => x.GetViewModel)
		   .ToList();
		}
		public SubjectViewModel? GetElement(SubjectSearchModel model)
		{
			if (string.IsNullOrEmpty(model.SubjectName) && !model.Id.HasValue)
			{
				return null;
			}
			using var context = new SchoolScheduleDataBase();
			return context.Subjects
			.FirstOrDefault(x =>
		   (!string.IsNullOrEmpty(model.SubjectName) && x.SubjectName ==
		   model.SubjectName) ||
			(model.Id.HasValue && x.Id == model.Id))
			?.GetViewModel;
		}
		public SubjectViewModel? Insert(SubjectBindingModel model)
		{
			using var context = new SchoolScheduleDataBase();
			var newComponent = Subject.Create(context, model);
			if (newComponent == null)
			{
				return null;
			}
			context.Subjects.Add(newComponent);
			context.SaveChanges();
			return newComponent.GetViewModel;
		}
		public SubjectViewModel? Update(SubjectBindingModel model)
		{
			using var context = new SchoolScheduleDataBase();
			var component = context.Subjects.FirstOrDefault(x => x.Id ==
		   model.Id);
			if (component == null)
			{
				return null;
			}
			component.Update(context, model);
			context.SaveChanges();
			return component.GetViewModel;
		}
		public SubjectViewModel? Delete(SubjectBindingModel model)
		{
			using var context = new SchoolScheduleDataBase();
			var element = context.Subjects.FirstOrDefault(rec => rec.Id ==
		   model.Id);
			if (element != null)
			{
				context.Subjects.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}

	}
}