using TransportLogisticContracts.BindingModels;
using TransportLogisticContracts.BusinessLogicsContracts;
using TransportLogisticContracts.SearchModels;
using TransportLogisticContracts.StorageContracts;
using TransportLogisticContracts.ViewModels;

namespace TransportLogisticBusinessLogic
{
	public class CustomerLogic : ICustomerLogic
	{
		public readonly ICustomerStorage _CustomerStorage;

		public CustomerLogic(ICustomerStorage CustomerStorage)
		{
			_CustomerStorage = CustomerStorage;
		}

		public List<CustomerViewModel>? ReadList(CustomerSearchModel? model)
		{
			var list = model == null ? _CustomerStorage.GetFullList() : _CustomerStorage.GetFilteredList(model);
			if (list == null)
			{
				return null;
			}
			return list;
		}

		public CustomerViewModel? ReadElement(CustomerSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			var element = _CustomerStorage.GetElement(model);
			if (element == null)
			{
				return null;
			}
			return element;
		}

		public bool Create(CustomerBindingModel model)
		{
			CheckModel(model);
			if (_CustomerStorage.Insert(model) == null)
			{
				return false;
			}
			return true;
		}

		public bool Delete(CustomerBindingModel model)
		{
			CheckModel(model, false);
			if (_CustomerStorage.Delete(model) == null)
			{
				return false;
			}
			return true;
		}

		public bool Update(CustomerBindingModel model)
		{
			CheckModel(model);
			if (_CustomerStorage.Update(model) == null)
			{
				return false;
			}
			return true;
		}

		private void CheckModel(CustomerBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.Name))
			{
				throw new ArgumentNullException("Нет имени заказчика",
			   nameof(model.Name));
			}
			var element = _CustomerStorage.GetElement(new CustomerSearchModel
			{
				Name = model.Name
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Заказчик с таким названием уже есть");
			}
		}
	}
}