using DatabaseCore;
using DatabaseCore.Models.Department;
using DepartmentBusinessLogic.BindingModels;
using DepartmentBusinessLogic.Interfaces;
using DepartmentBusinessLogic.ViewModels;
using ModuleTools.BusinessLogics;
using ModuleTools.Enums;
using ModuleTools.Models;
using System;
using System.Linq;
using System.Threading.Tasks;

namespace DepartmentDatabaseImplementation.Implementations
{
	/// <summary>
	/// Реализация IOrderSyncHistoryService
	/// </summary>
	public class OrderSyncHistoryService : IOrderSyncHistoryService
	{
		public async Task<OperationResultModel> CreateAsync(OrderSyncHistorySetBindingModel model)
		{
			using var context = DatabaseManager.GetContext;

			var entity = Mapper.MapToClass<OrderSyncHistorySetBindingModel, OrderSyncHistory>(model, true);
			await context.OrderSyncHistories.AddAsync(entity);
			await context.SaveChangesAsync();
			return OperationResultModel.Success(Mapper.MapToClass<OrderSyncHistory, OrderSyncHistoryViewModel>(entity, true));
		}

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

				context.OrderSyncHistories.Remove(entity);
				await context.SaveChangesAsync();

				var records = context.OrderSyncHistoryRecords.Where(x => x.OrderSyncHistoryId == model.Id);
				context.OrderSyncHistoryRecords.RemoveRange(records);
				await context.SaveChangesAsync();

				await transaction.CommitAsync();
			}
			catch (Exception)
			{
				await transaction.RollbackAsync();
				throw;
			}

			return OperationResultModel.Success(true);
		}

		public async Task<OperationResultModel> ReadAsync(OrderSyncHistoryGetBindingModel model)
		{
			int countPages = 0;
			using var context = DatabaseManager.GetContext;

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

			var query = context.OrderSyncHistories.AsQueryable();

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

			return await Task.Run(() =>
			{
				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 OrderSyncHistoryListViewModel
				{
					MaxCount = countPages,
					List = query.Select(x => Mapper.MapToClass<OrderSyncHistory, OrderSyncHistoryViewModel>(x, model.HaveRight)).ToList()
				};

				return OperationResultModel.Success(result);
			});
		}

		public async Task<OperationResultModel> UpdateAsync(OrderSyncHistorySetBindingModel model)
		{
			using var context = DatabaseManager.GetContext;

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

			await context.SaveChangesAsync();

			return OperationResultModel.Success(Mapper.MapToClass<OrderSyncHistory, OrderSyncHistoryViewModel>(entity, true));
		}
	}
}