using AbstractFoodOrdersContracts.BindingModels;
using AbstractFoodOrdersContracts.BusinessLogicsContracts;
using AbstractFoodOrdersContracts.SearchModels;
using AbstractFoodOrdersContracts.StoragesContracts;
using AbstractFoodOrdersContracts.ViewModels;
using AbstractFoodOrdersDataModels.Models;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AbstractFoodOrdersBusinessLogic.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:{ShopName}. Id:{Id}", model?.ShopName, 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 ShopViewModel? ReadElement(ShopSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation("ReadElement. ShopName:{ShopName}. Id:{Id}", model.ShopName, 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 иагазина", nameof(model.ShopName));
			}
			if (string.IsNullOrEmpty(model.ShopAdress))
			{
				throw new ArgumentNullException("Нет адресса магазина", nameof(model.ShopAdress));
			}
			_logger.LogInformation("Shop. ShopName:{ShopName}. Id:{Id}", model.ShopName, model.Id);
			var element = _shopStorage.GetElement(new ShopSearchModel
			{
				ShopName = model.ShopName
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Магазин с таким названием уже есть");
			}
		}

		public bool DeliverDishToShop(ShopBindingModel shopModel, IDishModel dishModel, int count)
		{
			CheckModel(shopModel, false);
			if (dishModel == null)
			{
				throw new ArgumentNullException(nameof(dishModel));
			}
			if (count <= 0)
			{
				throw new ArgumentNullException("Количество изделий в поставке должно быть больше нуля!");
			}
			var element = _shopStorage.GetElement(new ShopSearchModel
			{
				Id = shopModel.Id
			});
			if (element == null)
			{
				_logger.LogWarning("Read operation failed");
				return false;
			}
			_logger.LogInformation("Delivery. ShopName:{ShopName}. Id:{Id}. DishName:{DishName}. Count:{count}", element.ShopName, element.Id, dishModel.DishName, count);
			if (element.ShopDishes.TryGetValue(dishModel.Id, out var shopDish))
			{
				element.ShopDishes[dishModel.Id] = (dishModel, shopDish.Item2 + count);
			}
			else
			{
				element.ShopDishes.Add(dishModel.Id, (dishModel, count));
			}
			_shopStorage.Update(new ShopBindingModel
			{
				Id = element.Id,
				ShopName = element.ShopName,
				ShopAdress = element.ShopAdress,
				OpeningDate = element.OpeningDate,
				ShopDishes = element.ShopDishes
			});
			return true;
		}
	}
}