using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.BusinessLogicsContracts;
using ConfectioneryContracts.SearchModels;
using ConfectioneryContracts.StoragesContracts;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDataModels.Models;
using Microsoft.Extensions.Logging;
namespace ConfectioneryBusinessLogic.BusinessLogics
{
	public class ShopLogic : IShopLogic
	{
		private readonly ILogger _logger;
		private readonly IShopStorage _shopStorage;
		public ShopLogic(ILogger<ShopLogic> logger, IShopStorage shopStorage)
		{
			_logger = logger;
			_shopStorage = shopStorage;
		}
		public List<ShopViewModel> ReadList(ShopSearchModel model)
		{
			_logger.LogInformation("ReadList. ShopName:{Name}. Id:{ Id}", 
				model?.Name, model?.Id);
			var list = model == null ? _shopStorage.GetFullList() : 
				_shopStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
			return list;
		}
		public bool MakeSupply(ShopSearchModel model, 
			IPastryModel pastry, int count)
		{
			if (model == null)
				throw new ArgumentNullException(nameof(model));
			if (pastry == null)
				throw new ArgumentNullException(nameof(pastry));
			if (count <= 0)
				throw new ArgumentNullException(
					"Количество должно быть положительным числом");

			ShopViewModel curModel = _shopStorage.GetElement(model);
			if (curModel == null)
				throw new ArgumentNullException(nameof(curModel));
			var countItems = curModel.ShopPastries
				.Select(x => x.Value.Item2).Sum();
			if (curModel.MaxCapacity - countItems >= count)
			{
				if (curModel.ShopPastries.TryGetValue(
					pastry.Id, out var sameDocument))
				{
					curModel.ShopPastries[pastry.Id] = 
						(pastry, sameDocument.Item2 + count);
					_logger.LogInformation(
						"Same pastry found by supply. " +
						"Added {0} of {1} in {2} shop", count, 
						pastry.PastryName, curModel.ShopName);
				}
				else
				{
					curModel.ShopPastries[pastry.Id] = (pastry, count);
					_logger.LogInformation("New pastry added by supply. " +
						"Added {0} of {1} in {2} shop", count, 
						pastry.PastryName, curModel.ShopName);
				}
				_shopStorage.Update(new()
				{
					Id = curModel.Id,
					ShopName = curModel.ShopName,
					Address = curModel.Address,
					DateOpen = curModel.DateOpen,
					ShopPastries = curModel.ShopPastries,
					MaxCapacity = curModel.MaxCapacity
				});
			}
			else
			{
				_logger.LogWarning("Required shop is overflowed");
				return false;
			}
			return true;
		}
		public ShopViewModel ReadElement(ShopSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation(
				"ReadElement. ShopName:{ShopName}.Id:{ Id}", 
				model.Name, model.Id);
			var element = _shopStorage.GetElement(model);
			if (element == null)
			{
				_logger.LogWarning("ReadElement element not found");
				return null;
			}
			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
			return element;
		}
		public bool Create(ShopBindingModel model)
		{
			CheckModel(model);
			if (_shopStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}
			return true;
		}
		public bool Update(ShopBindingModel model)
		{
			CheckModel(model);
			if (_shopStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}
		public bool Delete(ShopBindingModel model)
		{
			CheckModel(model, false);
			_logger.LogInformation("Delete. Id:{Id}", model.Id);
			if (_shopStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}
		private void CheckModel(ShopBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.ShopName))
			{
				throw new ArgumentNullException("Нет названия магазина", 
					nameof(model.ShopName));
			}
			if (string.IsNullOrEmpty(model.Address))
			{
				throw new ArgumentNullException("Нет адресса магазина", 
					nameof(model.Address));
			}
			if (model.DateOpen == null)
			{
				throw new ArgumentNullException("Нет даты открытия магазина", 
					nameof(model.DateOpen));
			}
			_logger.LogInformation(
				"Shop. ShopName:{ShopName}.Address:{Address}. " +
				"DateOpen:{DateOpen}. Id: { Id}", model.ShopName, 
				model.Address, model.DateOpen, model.Id);
			var element = _shopStorage.GetElement(new ShopSearchModel
			{
				Name = model.ShopName
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException(
					"Магазин с таким названием уже есть");
			}
		}
		public bool MakeSell(IPastryModel pastry, int count)
		{
			return _shopStorage.SellPastries(pastry, count);
		}
	}
}