using Microsoft.Extensions.Logging;
using TransportCompanyContracts.BindingModels;
using TransportCompanyContracts.BusinessLogicsContracts;
using TransportCompanyContracts.SearchModels;
using TransportCompanyContracts.StoragesContracts;
using TransportCompanyContracts.ViewModels;

namespace TransportCompanyBusinessLogic.BusinessLogics
{
    public class CargoLogic : ICargoLogic
    {
        private readonly ILogger _logger;

        private readonly ICargoStorage _cargoStorage;

        public CargoLogic(ILogger <CargoLogic> logger, ICargoStorage cargoStorage)
        {
            _logger = logger;
            _cargoStorage = cargoStorage;
        }

        public List<CargoViewModel>? ReadList(CargoSearchModel? model)
        {
            _logger.LogInformation("ReadList. CargoName:{CargoName}. Id:{Id}", model?.CargoName, model?.Id);
            var list = model == null ? _cargoStorage.GetFullList() : _cargoStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public CargoViewModel? ReadElement(CargoSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. CargoName:{CargoName}. Id:{Id}", model.CargoName, model.Id);
            var element = _cargoStorage.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(CargoBindingModel model)
        {
            CheckModel(model);
            if (_cargoStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Update(CargoBindingModel model)
        {
            CheckModel(model);
            if (_cargoStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(CargoBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_cargoStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(CargoBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.CargoName))
            {
                throw new ArgumentNullException("Нет названия груза", nameof(model.CargoName));
            }
            if (model.Weight <= 0)
            {
                throw new ArgumentNullException("Вес груза должен быть больше 0", nameof(model.Weight));
            }
            _logger.LogInformation("Cargo. CargoName:{CargoName}. Weight:{Weight}. Id:{Id}", model.CargoName, model.Weight, model.Id);
            var element = _cargoStorage.GetElement(new CargoSearchModel
            {
                CargoName = model.CargoName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Груз с таким названием уже есть");
            }
        }
    }
}