using CarRentContracts.BindingModels;
using CarRentContracts.BusinessLogicContracts;
using CarRentContracts.SearchModels;
using CarRentContracts.StoragesContracts;
using CarRentContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CarRentBusinessLogic.BusinessLogics
{
	public class CarLogic : ICarLogic
	{
		private readonly ICarStorage _carStorage;
		public CarLogic(ICarStorage CarStorage)
		{
			_carStorage = CarStorage;
		}
		public List<CarViewModel>? ReadList(CarSearchModel? model)
		{
			var list = model == null ? _carStorage.GetFullList() :
								   _carStorage.GetFilteredList(model);
			if (list == null)
			{
				return null;
			}
			return list;
		}
		public CarViewModel? ReadElement(CarSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			var element = _carStorage.GetElement(model);
			if (element == null)
			{
				return null;
			}
			return element;
		}
		public bool Create(CarBindingModel model)
		{
			CheckModel(model);
			if (_carStorage.Insert(model) == null)
			{
				return false;
			}
			return true;
		}
		public bool Update(CarBindingModel model)
		{
			CheckModel(model);
			if (_carStorage.Update(model) == null)
			{
				return false;
			}
			return true;
		}
		public bool Delete(CarBindingModel model)
		{
			CheckModel(model, false);
			if (_carStorage.Delete(model) == null)
			{
				return false;
			}
			return true;
		}
		private void CheckModel(CarBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.Brand))
			{
				throw new ArgumentNullException("Нет производителя авто",
			   nameof(model.Brand));
			}
			if (string.IsNullOrEmpty(model.Model))
			{
				throw new ArgumentNullException("Нет адреса филиала",
			   nameof(model.Model));
			}
			if (string.IsNullOrEmpty(model.Color))
			{
				throw new ArgumentNullException("Нет номера телефона филиала",
			   nameof(model.Color));
			}
			if (string.IsNullOrEmpty(model.LicensePlate))
			{
				throw new ArgumentNullException("Нет номера телефона филиала",
			   nameof(model.LicensePlate));
			}
			if(model.RentalCostPerHour < 0)
			{
				throw new ArgumentNullException("Цена аренды должна быть больше 0",
					nameof(model.RentalCostPerHour));
			}
			if(model.YearOfManuf > DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Utc))
			{
				throw new ArgumentNullException("Неверно указана дата выпуска автомобиля",
					nameof(model.YearOfManuf));
			}
			if (model.BranchId < 0)
			{
				throw new ArgumentNullException("Укажите филиал",
					nameof(model.BranchId));
			}
			var element = _carStorage.GetElement(
				new CarSearchModel
				{
					LicensePlate = model.LicensePlate
				}
			);
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Автомобиль с таким номером уже есть");
			}
		}
	}
}