using CoreDatabase;
using CoreDatabase.Models.Department;
using DepartmentBusinessLogic.BindingModels;
using DepartmentBusinessLogic.Interfaces;
using DepartmentBusinessLogic.ViewModels;
using Microsoft.EntityFrameworkCore;
using ToolsModule.Enums;
using ToolsModule.Models;
using System.Linq;

namespace DepartmentDatabaseImplementation.Implementations
{
	/// <summary>
	/// Реализация IPostService
	/// </summary>
	public class PostService :
		AbstractGenerticEntityService<PostGetBindingModel, PostSetBindingModel, Post, PostListViewModel, PostViewModel>,
		IPostService
	{
		protected override OperationResultModel AdditionalCheckingWhenAdding(DbContext context, PostSetBindingModel model) => OperationResultModel.Success(null);

		protected override OperationResultModel AdditionalCheckingWhenDeleting(DbContext context, Post entity, PostGetBindingModel model)
		{
			if (context.Set<EmployeePost>().Any(x => x.PostId == model.Id && !x.IsDeleted))
			{
				return OperationResultModel.Error("Error:", "Существуют сотрудники с этой должностью", ResultServiceStatusCode.ExsistItem);
			}
			if (context.Set<LecturerPost>().Any(x => x.PostId == model.Id && !x.IsDeleted))
			{
				return OperationResultModel.Error("Error:", "Существуют преподаватели с этой должностью", ResultServiceStatusCode.ExsistItem);
			}
			return OperationResultModel.Success(null);
		}

		protected override IQueryable<Post> AdditionalCheckingWhenReadingList(IQueryable<Post> query, PostGetBindingModel model) => query;

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

		protected override void AdditionalDeleting(DbContext context, Post entity, PostGetBindingModel model) { }

		protected override Post GetUniqueEntity(PostSetBindingModel model, DbContext context) => context.Set<Post>().FirstOrDefault(x => x.PostName == model.PostName && x.Id != model.Id);

		protected override IQueryable<Post> IncludingWhenReading(IQueryable<Post> query) => query;

		protected override IQueryable<Post> OrderingWhenReading(IQueryable<Post> query) => query.OrderByDescending(x => x.Order);
	}
}