using CoreDatabase;
using CoreDatabase.Models.Department;
using DepartmentContract.BindingModels;
using DepartmentContract.Services.IGenericEntityService;
using DepartmentContract.ViewModels;
using Microsoft.EntityFrameworkCore;
using System.Linq;
using ToolsModule.ManagmentEntity;

namespace DepartmentDatabaseImplementation.Implementations.AbstractGenerticEntityService
{
    /// <summary>
    /// Реализация IEnrollmentYearService
    /// </summary>
    public class EnrollmentYearService :
		AbstractGenerticEntityService<EnrollmentYearGetBindingModel, EnrollmentYearSetBindingModel, EnrollmentYear, EnrollmentYearListViewModel, EnrollmentYearViewModel>,
		IEnrollmentYearService
	{
		protected override OperationResultModel AdditionalCheckingWhenAdding(DbContext context, EnrollmentYearSetBindingModel model) => OperationResultModel.Success(null);

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

		protected override IQueryable<EnrollmentYear> AdditionalCheckingWhenReadingList(IQueryable<EnrollmentYear> query, EnrollmentYearGetBindingModel model)
		{
			if (model.AcademicPlanId.HasValue)
			{
				query = query.Where(x => x.AcademicPlanId == model.AcademicPlanId.Value);
			}
			if (model.EducationDirectionId.HasValue)
			{
				query = query.Where(x => x.AcademicPlan.EducationDirectionId == model.EducationDirectionId.Value);
			}
			if (model.Year.HasValue)
			{
				query = query.Where(x => x.YearEntrance == model.Year.Value);
			}
			return query;
		}

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

		protected override void AdditionalDeleting(DbContext context, EnrollmentYear entity, EnrollmentYearGetBindingModel model)
		{
			var records = context.Set<Student>().Where(x => x.EnrollmentYearId == model.Id);
			foreach (var record in records)
			{
				record.EnrollmentYearId = null;
			}
			context.SaveChanges();
		}

		protected override EnrollmentYear GetUniqueEntity(EnrollmentYearSetBindingModel model, IQueryable<EnrollmentYear> query) => query.FirstOrDefault(x => x.AcademicPlanId == model.AcademicPlanId && x.YearEntrance == model.YearEntrance && x.Id != model.Id);

		protected override IQueryable<EnrollmentYear> IncludingWhenReading(IQueryable<EnrollmentYear> query) => query.Include(x => x.AcademicPlan).Include(x => x.AcademicPlan.EducationDirection);

		protected override IQueryable<EnrollmentYear> OrderingWhenReading(IQueryable<EnrollmentYear> query) => query.OrderBy(x => x.AcademicPlan.EducationDirection.Cipher).ThenBy(x => x.YearEntrance);

        protected override bool AdditionalCheckForSingleGet(EnrollmentYearGetBindingModel model)
		{
			if (model.EducationDirectionId.HasValue && model.Year.HasValue)
			{
				return true;
			}
			return base.AdditionalCheckForSingleGet(model);
        }

        protected override EnrollmentYear GetSingleRecord(IQueryable<EnrollmentYear> list, EnrollmentYearGetBindingModel model)
		{
			if (model.EducationDirectionId.HasValue && model.Year.HasValue)
			{
				return list.FirstOrDefault(x => x.AcademicPlan.EducationDirectionId == model.EducationDirectionId && x.YearEntrance == model.Year);
			}
			return base.GetSingleRecord(list, model);
        }
    }
}