using ComputerShopContracts.BindingModels;
using ComputerShopContracts.BusinessLogicContracts;
using ComputerShopContracts.SearchModels;
using ComputerShopContracts.StorageContracts;
using ComputerShopContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace ComputerShopBusinessLogic.BusinessLogics
{
	public class ShipmentLogic : IShipmentLogic
	{
		private readonly ILogger _logger;
		private readonly IShipmentStorage _shipmentStorage;

		public ShipmentLogic(ILogger<ShipmentLogic> logger, IShipmentStorage shipmentStorage)
		{
			_logger = logger;
			_shipmentStorage = shipmentStorage;
		}

		//!!!ТУТ МБ ПО-ДРУГОМУ ПРИСВАИВАТЬ ЗНАЧЕНИЕ ДЛЯ list (через fulllist)
		//!!!ИЛИ СОЗДАТЬ ОТДЕЛЬНЫЙ МЕТОД ReadListUser
		public List<ShipmentViewModel> ReadList(ShipmentSearchModel? model)
		{
			//model.UserId = -1 для swagger, чтобы можно было считать все партии товаров всех пользователей
			var list = (model == null || model.UserId == -1) ? _shipmentStorage.GetFullList() : _shipmentStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList Count:{Count}", list.Count);
			return list;
		}

		public ShipmentViewModel? ReadElement(ShipmentSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			var shipment = _shipmentStorage.GetElement(model);
			if (shipment == null)
			{
				_logger.LogWarning("ReadElement shipment not found");
				return null;
			}
			_logger.LogInformation("ReadElement found. Id:{Id}", shipment.Id);
			return shipment;
		}

		public bool Create(ShipmentBindingModel model)
		{
			CheckModel(model);
			if (_shipmentStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}
			return true;
		}

		public bool Update(ShipmentBindingModel model)
		{
			CheckModel(model);
			if (_shipmentStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}

		public bool Delete(ShipmentBindingModel model)
		{
			CheckModel(model, false);
			_logger.LogInformation("Delete. Id:{Id}", model.Id);
			if (_shipmentStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}

		private void CheckModel(ShipmentBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.ProviderName))
			{
				throw new ArgumentNullException("Нет имени поставщика", nameof(model.ProviderName));
			}
			if (model.DateShipment > DateTime.Now)
			{
				throw new ArgumentException($"Дата поступления {model.DateShipment} партии товаров не может быть в будущем");
			}
		}
	}
}