using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.BusinessLogicsContracts;
using ConfectioneryContracts.SearchModels;
using ConfectioneryContracts.StoragesContract;
using ConfectioneryContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace ConfectioneryBusinessLogic.BusinessLogics
{
	public class ComponentLogic : IComponentLogic
	{
		private readonly ILogger _logger;
		private readonly IComponentStorage _componentStorage;
		public ComponentLogic(ILogger<ComponentLogic> logger, IComponentStorage componentStorage)
		{
			_logger = logger;
			_componentStorage = componentStorage;
		}
		public List<ComponentViewModel>? ReadList(ComponentSearchModel? model)
		{
			_logger.LogInformation("ReadList. ComponentName:{ComponentName}.Id:{ Id} ",
				model?.ComponentName, model?.Id);
			var list = (model == null) ? _componentStorage.GetFullList() :
			_componentStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
			return list;
		}
		public ComponentViewModel? ReadElement(ComponentSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation("ReadElement. ComponentName:{ComponentName}.Id:{ Id}",
				model.ComponentName, model.Id);
			var element = _componentStorage.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(ComponentBindingModel model)
		{
			CheckModel(model);
			if (_componentStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}
			return true;
		}
		public bool Update(ComponentBindingModel model)
		{
			CheckModel(model);
			if (_componentStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}
		public bool Delete(ComponentBindingModel model)
		{
			CheckModel(model, false);
			_logger.LogInformation("Delete. Id:{Id}", model.Id);
			if (_componentStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}
		private void CheckModel(ComponentBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.ComponentName))
			{
				throw new ArgumentNullException("Нет названия компонента",
				nameof(model.ComponentName));
			}
			if (model.Cost <= 0)
			{
				throw new ArgumentNullException("Цена компонента должна быть больше 0", nameof(model.Cost));
			}
			_logger.LogInformation("Component. ComponentName:{ComponentName}.Cost:{ Cost}. Id: { Id}",
				model.ComponentName, model.Cost, model.Id);
			var element = _componentStorage.GetElement(new ComponentSearchModel
			{
				ComponentName = model.ComponentName
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Компонент с таким названием уже есть");
			}
		}
	}
}