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

namespace DepartmentDatabaseImplementation.Implementations.AbstractGenerticEntityService
{
    /// <summary>
    /// Реализация IStudentMarkSyncHistoryService
    /// </summary>
    public class StudentMarkSyncHistoryService : IStudentMarkSyncHistoryService
	{
		public OperationResultModel Create(StudentMarkSyncHistorySetBindingModel model)
		{
			using var context = DatabaseManager.GetContext;

			var entity = Mapper.MapToClass<StudentMarkSyncHistorySetBindingModel, StudentMarkSyncHistory>(model, true);
			context.StudentMarkSyncHistories.Add(entity);
			context.SaveChanges();
			return OperationResultModel.Success(Mapper.MapToClass<StudentMarkSyncHistory, StudentMarkSyncHistoryViewModel>(entity, true));
		}

		public OperationResultModel Delete(StudentMarkSyncHistoryGetBindingModel model)
		{
			using var context = DatabaseManager.GetContext;
			using var transaction = context.Database.BeginTransaction();
			try
			{
				var entity = context.StudentMarkSyncHistories.FirstOrDefault(x => x.Id == model.Id);
				if (entity == null)
				{
					return OperationResultModel.Error("Error:", "Элемент не найден", ResultServiceStatusCode.NotFound);
				}

				context.StudentMarkSyncHistories.Remove(entity);
				context.SaveChanges();

				var records = context.StudentMarkSyncHistoryRecords.Where(x => x.StudentMarkSyncHistoryId == model.Id);
				context.StudentMarkSyncHistoryRecords.RemoveRange(records);
				context.SaveChanges();

				transaction.Commit();
			}
			catch (Exception)
			{
				transaction.Rollback();
				throw;
			}

			return OperationResultModel.Success(true);
		}

		public OperationResultModel Read(StudentMarkSyncHistoryGetBindingModel model)
		{
			int countPages = 0;
			using var context = DatabaseManager.GetContext;

			// для одной записи
			if (model.Id.HasValue)
			{
				var entity = context.StudentMarkSyncHistories.FirstOrDefault(x => x.Id == model.Id.Value);
				if (entity == null)
				{
					return OperationResultModel.Error("Error:", "Элемент не найден", ResultServiceStatusCode.NotFound);
				}
				return OperationResultModel.Success(Mapper.MapToClass<StudentMarkSyncHistory, StudentMarkSyncHistoryViewModel>(entity, model.HaveRight));
			}

			var query = context.StudentMarkSyncHistories.AsQueryable();

			query = query.OrderByDescending(x => x.SyncDate);

			if (model.PageNumber.HasValue && model.PageSize.HasValue)
			{
				countPages = (int)Math.Ceiling((double)query.Count() / model.PageSize.Value);
				query = query
							.Skip(model.PageSize.Value * model.PageNumber.Value)
							.Take(model.PageSize.Value);
			}
			var result = new StudentMarkSyncHistoryListViewModel
			{
				MaxCount = countPages,
				List = query.Select(x => Mapper.MapToClass<StudentMarkSyncHistory, StudentMarkSyncHistoryViewModel>(x, model.HaveRight)).ToList()
			};

			return OperationResultModel.Success(result);
		}

		public OperationResultModel Restore(StudentMarkSyncHistoryGetBindingModel model)
		{
			throw new NotImplementedException();
		}

		public OperationResultModel Update(StudentMarkSyncHistorySetBindingModel model)
		{
			using var context = DatabaseManager.GetContext;

			var entity = context.StudentMarkSyncHistories.FirstOrDefault(x => x.Id == model.Id);
			if (entity == null)
			{
				return OperationResultModel.Error("Error:", "Элемент не найден", ResultServiceStatusCode.NotFound);
			}
			entity = Mapper.MapToClass(model, entity, true);

			context.SaveChanges();

			return OperationResultModel.Success(Mapper.MapToClass<StudentMarkSyncHistory, StudentMarkSyncHistoryViewModel>(entity, true));
		}
	}
}