using CoreDatabase;
using CoreDatabase.Models.Department;
using CoreDatabase.Models.Security;
using Microsoft.EntityFrameworkCore;
using SecurityContract.BindingModels;
using SecurityContract.Services.IGenericEntityService;
using SecurityContract.ViewModels;
using System;
using System.Linq;
using ToolsModule.Enums;
using ToolsModule.Extensions;
using ToolsModule.Models;

namespace SecurityDatabaseImplementation.Implementations.AbstractGenerticEntityService
{
    /// <summary>
    /// Реализация IUserService
    /// </summary>
    public class UserService :
		AbstractGenerticEntityService<UserGetBindingModel, UserSetBindingModel, User, UserListViewModel, UserViewModel>,
		IUserService
	{
		protected override OperationResultModel AdditionalCheckingWhenAdding(DbContext context, UserSetBindingModel model)
		{
			if (model.PasswordHash.IsEmpty())
			{
				model.PasswordHash = "qwerty";
			}
			model.PasswordHash = SecurityManager.GetPasswordHash(model.PasswordHash);
			return OperationResultModel.Success(null);
		}

		protected override OperationResultModel AdditionalCheckingWhenDeleting(DbContext context, User entity, UserGetBindingModel model)
		{
			if (context.Set<Employee>().Any(x => x.UserId == model.Id && !x.IsDeleted))
			{
				return OperationResultModel.Error("Error:", "Имеется сотрудник, приязанный к этой учетке", ResultServiceStatusCode.ExsistItem);
			}
			if (context.Set<Lecturer>().Any(x => x.UserId == model.Id && !x.IsDeleted))
			{
				return OperationResultModel.Error("Error:", "Имеется преподаватель, приязанный к этой учетке", ResultServiceStatusCode.ExsistItem);
			}
			if (context.Set<Student>().Any(x => x.UserId == model.Id && !x.IsDeleted))
			{
				return OperationResultModel.Error("Error:", "Имеется студент, приязанный к этой учетке", ResultServiceStatusCode.ExsistItem);
			}
			return OperationResultModel.Success(null);
		}

		protected override IQueryable<User> AdditionalCheckingWhenReadingList(IQueryable<User> query, UserGetBindingModel model)
		{
			if (model.UserNameForSearch.IsNotEmpty())
			{
				query = query.Where(x => x.UserName.Contains(model.UserNameForSearch));
			}
			return query;
		}

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

		protected override void AdditionalDeleting(DbContext context, User entity, UserGetBindingModel model)
		{
			var users = context.Set<UserRole>().Where(x => x.UserId == model.Id);
			foreach (var u in users)
			{
				u.IsDeleted = true;
				u.DateDelete = DateTime.Now;
			}
			context.SaveChanges();
		}

		protected override User GetUniqueEntity(UserSetBindingModel model, DbContext context) => context.Set<User>().FirstOrDefault((System.Linq.Expressions.Expression<Func<User, bool>>)(x => x.UserName == model.UserName && x.Id != model.Id));

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

		protected override IQueryable<User> OrderingWhenReading(IQueryable<User> query) => query.OrderBy(x => x.UserName);

		protected override bool AdditionalCheckForSingleGet(UserGetBindingModel model)
		{
			if (model.Login.IsNotEmpty())
			{
				return true;
			}
			return base.AdditionalCheckForSingleGet(model);
		}

		protected override User GetSingleRecord(IQueryable<User> list, UserGetBindingModel model)
		{
			if (model.Login.IsNotEmpty())
			{
				return list.FirstOrDefault(x => x.UserName == model.Login);
			}
			return base.GetSingleRecord(list, model);
		}
	}
}