using DatabaseCore;
using DatabaseCore.Models.Department;
using DepartmentBusinessLogic.BindingModels;
using DepartmentBusinessLogic.Interfaces;
using DepartmentBusinessLogic.ViewModels;
using Microsoft.EntityFrameworkCore;
using ModuleTools.Models;
using System;
using System.Linq;

namespace DepartmentDatabaseImplementation.Implementations
{
	/// <summary>
	/// Реализация IStudentService
	/// </summary>
	public class StudentService :
		AbstractGenerticEntityService<StudentGetBindingModel, StudentSetBindingModel, Student, StudentListViewModel, StudentViewModel>,
		IStudentService
	{
		protected override OperationResultModel AdditionalCheckingWhenAdding(DbContext context, StudentSetBindingModel model) => OperationResultModel.Success(null);

		protected override OperationResultModel AdditionalCheckingWhenDeleting(DbContext context, Student entity, StudentGetBindingModel model) => OperationResultModel.Success(null);

		protected override IQueryable<Student> AdditionalCheckingWhenReadingList(IQueryable<Student> query, StudentGetBindingModel model)
		{
			if (model.UserId.HasValue)
			{
				query = query.Where(x => x.UserId == model.UserId.Value);
			}
			if (model.StudentGroupId.HasValue)
			{
				query = query.Where(x => x.StudentGroupId == model.StudentGroupId.Value);
			}
			if (model.StudentState.HasValue)
			{
				query = query.Where(x => x.StudentState == (int)model.StudentState.Value);
			}
			return query;
		}

		protected override OperationResultModel AdditionalCheckingWhenUpdateing(DbContext context, StudentSetBindingModel model) => OperationResultModel.Success(null);

		protected override void AdditionalDeleting(DbContext context, Student entity, StudentGetBindingModel model)
		{
			var orders = context.Set<OrderStudentRecord>().Where(x => x.StudentId == model.Id);
			foreach (var o in orders)
			{
				o.IsDeleted = true;
				o.DateDelete = DateTime.Now;
			}
			context.SaveChanges();
		}

		protected override Student GetUniqueEntity(StudentSetBindingModel model, DbContext context) => context.Set<Student>().FirstOrDefault(x => x.NumberOfBook == model.NumberOfBook && x.Id != model.Id);

		protected override IQueryable<Student> IncludingWhenReading(IQueryable<Student> query) => query.Include(x => x.StudentGroup).Include(x => x.User);

		protected override IQueryable<Student> OrderingWhenReading(IQueryable<Student> query) => query.OrderBy(x => x.StudentGroup.AcademicCourse).ThenBy(x => x.StudentGroup.GroupNumber).ThenBy(x => x.LastName).ThenBy(x => x.FirstName);
	}
}