using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.StorageContracts;
using CanteenContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenBusinessLogic.BusinessLogics
{
	public class IngredientLogic : IIngredientLogic
	{
		private readonly ILogger _logger;
		private readonly IIngredientStorage _ingredientStorage;
		public IngredientLogic(ILogger<IngredientLogic> logger, IIngredientStorage ingredientStorage)
		{
			_logger = logger;
			_ingredientStorage = ingredientStorage;
		}
		public List<IngredientViewModel>? ReadList(IngredientSearchModel? model)
		{
			_logger.LogInformation("ReadList. IngredientName:{IngredientName}.Id:{ Id}", model?.IngredientName, model?.Id);
			var list = model == null ? _ingredientStorage.GetFullList() : _ingredientStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
			return list;
		}
		public IngredientViewModel? ReadElement(IngredientSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation("ReadElement. IngredientName:{IngredientName}.Id:{ Id}", model.IngredientName, model.Id);
			var element = _ingredientStorage.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(IngredientBindingModel model)
		{
			CheckModel(model);
			if (_ingredientStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}
			return true;
		}
		public bool Update(IngredientBindingModel model)
		{
			CheckModel(model);
			if (_ingredientStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}
		public bool Delete(IngredientBindingModel model)
		{
			CheckModel(model, false);
			_logger.LogInformation("Delete. Id:{Id}", model.Id);
			if (_ingredientStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}
		private void CheckModel(IngredientBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.IngredientName))
			{
				throw new ArgumentNullException("Нет названия материала", nameof(model.IngredientName));
			}
			if (model.IngredientCost <= 0)
			{
				throw new ArgumentNullException("Цена материала должна быть больше 0", nameof(model.IngredientCost));
			}
			_logger.LogInformation("Ingredient. IngredientName:{IngredientName}.IngredientCost:{ IngredientCost}.Id: { Id}", model.IngredientName, model.IngredientCost, model.Id);
			var element = _ingredientStorage.GetElement(new IngredientSearchModel
			{
				IngredientName = model.IngredientName
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Материал с таким названием уже есть");
			}
		}
	}
}