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

namespace SchoolScheduleDataBaseImplement.Implements
{
	public class LessonStorage : ILessonStorage
	{
		public List<LessonViewModel> GetFullList()
		{
			using var context = new SchoolScheduleDataBase();
			return context.Lessons.Include(x => x.Grade).Include(x => x.Subject).Include(x => x.SchedulePlace).Include(x => x.Teacher)
			.Select(x => x.GetViewModel)
		   .ToList();
		}
		public List<LessonViewModel> GetFilteredList(LessonSearchModel model)
		{
			using var context = new SchoolScheduleDataBase();
			return context.Lessons.Include(x => x.Grade)
			.Where(x => (!model.Id.HasValue || x.Id == model.Id) && (!model.GradeId.HasValue || x.GradeId == model.GradeId)
			&& (!model.TeacherId.HasValue || x.TeacherId == model.TeacherId) && (!model.SubjectId.HasValue || x.TeacherId == model.SubjectId)
			&& (!model.Date.HasValue || x.Date == model.Date) && (!model.SchedulePlaceId.HasValue || x.SchedulePlaceId == model.SchedulePlaceId)
			&& (!model.DateFrom.HasValue || x.Date >= model.DateFrom) && (!model.DateTo.HasValue || x.Date <= model.DateTo))
		   .Select(x => x.GetViewModel)
		   .ToList();
		}
		public LessonViewModel? GetElement(LessonSearchModel model)
		{
			using var context = new SchoolScheduleDataBase();
			return context.Lessons.Include(x => x.Teacher)
			.FirstOrDefault(x => (!model.Id.HasValue || x.Id == model.Id) && (!model.GradeId.HasValue || x.GradeId == model.GradeId)
			&& (!model.TeacherId.HasValue || x.TeacherId == model.TeacherId) && (!model.SubjectId.HasValue || x.TeacherId == model.SubjectId)
			&& (!model.Date.HasValue || x.Date == model.Date) && (!model.SchedulePlaceId.HasValue || x.SchedulePlaceId == model.SchedulePlaceId))
			?.GetViewModel;
		}
		public LessonViewModel? Insert(LessonBindingModel model)
		{
			using var context = new SchoolScheduleDataBase();
			var newComponent = Lesson.Create(context, model);
			if (newComponent == null)
			{
				return null;
			}
			context.Lessons.Add(newComponent);
			context.SaveChanges();
			return newComponent.GetViewModel;
		}
		public LessonViewModel? Update(LessonBindingModel model)
		{
			using var context = new SchoolScheduleDataBase();
			var component = context.Lessons.FirstOrDefault(x => x.Id ==
		   model.Id);
			if (component == null)
			{
				return null;
			}
			component.Update(context, model);
			context.SaveChanges();
			return component.GetViewModel;
		}
		public LessonViewModel? Delete(LessonBindingModel model)
		{
			using var context = new SchoolScheduleDataBase();
			var element = context.Lessons.FirstOrDefault(rec => rec.Id ==
		   model.Id);
			if (element != null)
			{
				context.Lessons.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}
	}
}