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

namespace TransportLogisticBusinessLogic
{
	public class OrderLogic : IOrderLogic
	{
		private readonly IOrderStorage _orderStorage;

		public OrderLogic(IOrderStorage orderStorage)
		{
			_orderStorage = orderStorage;
		}

		public List<OrderViewModel>? ReadList(OrderSearchModel? model)
		{
			var list = model == null ? _orderStorage.GetFullList() :
		   _orderStorage.GetFilteredList(model);
			if (list == null)
			{
				return null;
			}
			return list;
		}

		public OrderViewModel? ReadElement(OrderSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			var element = _orderStorage.GetElement(model);
			if (element == null)
			{
				return null;
			}
			return element;
		}

		public bool CreateOrder(OrderBindingModel model)
		{
			CheckModel(model);
			if (model.Status != OrderStatus.Неизвестен) return false;
			model.Status = OrderStatus.Принят;
			if (_orderStorage.Insert(model) == null)
			{
				return false;
			}
			return true;
		}

		public bool ChangeStatus(OrderBindingModel model, OrderStatus status)
		{
			CheckModel(model);
			var element = _orderStorage.GetElement(new OrderSearchModel { Id = model.Id });
			if (element == null)
			{
				return false;
			}
			if (element.Status != status - 1)
			{
				throw new InvalidOperationException("Текущий статус заказа не может быть переведен в выбранный");
			}
			model.Status = status;
			if (model.Status == OrderStatus.Выдан) model.DateDelivered = DateTime.Now;
			if (_orderStorage.Update(model) == null)
			{
				model.Status--;
				return false;
			}
			return true;
		}

		public bool TakeOrderInWork(OrderBindingModel model)
		{
			return ChangeStatus(model, OrderStatus.В_пути);
		}

		public bool FinishOrder(OrderBindingModel model)
		{
			return ChangeStatus(model, OrderStatus.Доставлен);
		}
		public bool DeliveryOrder(OrderBindingModel model)
		{
			return ChangeStatus(model, OrderStatus.Выдан);
		}
		public bool Create(OrderBindingModel model)
		{
			CheckModel(model);
			if (_orderStorage.Insert(model) == null)
			{
				return false;
			}
			return true;
		}

		public bool Update(OrderBindingModel model)
		{
			CheckModel(model);
			if (_orderStorage.Update(model) == null)
			{

				return false;
			}
			return true;
		}

		public bool Delete(OrderBindingModel model)
		{
			CheckModel(model, false);
			if (_orderStorage.Delete(model) == null)
			{
				return false;
			}
			return true;
		}
		private void CheckModel(OrderBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
		}
	}
}