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

namespace TransportCompanyBusinessLogic.BusinessLogics
{
    public class TransportationLogic : ITransportationLogic
    {
        private readonly ILogger _logger;

        private readonly ITransportationStorage _transportationStorage;

        public TransportationLogic(ILogger<TransportationLogic> logger, ITransportationStorage transportationStorage)
        {
            _logger = logger;
            _transportationStorage = transportationStorage;
        }

        public List<TransportationViewModel>? ReadList(TransportationSearchModel? model)
        {
            _logger.LogInformation("ReadList. TransportationId:{Id}", model?.Id);
            var list = model == null ? _transportationStorage.GetFullList() : _transportationStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool CreateTransportation(TransportationBindingModel model)
        {
            CheckModel(model);
            if (model.Status != TransportationStatus.Неизвестен)
                return false;
            model.Status = TransportationStatus.Принят;
            if (_transportationStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool DeliveredTransportation(TransportationBindingModel model)
        {
            return ChangeStatus(model, TransportationStatus.Доставляется);
        }

        public bool ArrivedTransportation(TransportationBindingModel model)
        {
            return ChangeStatus(model, TransportationStatus.Прибыл);
        }

        public bool ShippedTransportation(TransportationBindingModel model)
        {
            return ChangeStatus(model, TransportationStatus.Отгружен);
        }

        private void CheckModel(TransportationBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Count <= 0)
            {
                throw new ArgumentException("Колличество груза в транспортировке не может быть меньше 1", nameof(model.Count));
            }
            if (model.ArrivalDate.HasValue && model.ArrivalDate < model.DepartureDate)
            {
                throw new ArithmeticException($"Дата отгрузки {model.ArrivalDate} не может быть раньше даты отправки {model.DepartureDate}");
            }
            _logger.LogInformation("Transportation. CargoId:{CargoId}.Count:{Count.}Id:{Id}",
                model.CargoId, model.Count, model.Id);
        }

        private bool ChangeStatus(TransportationBindingModel model, TransportationStatus requiredStatus)
        {
            CheckModel(model, false);
            var element = _transportationStorage.GetElement(new TransportationSearchModel()
            {
                Id = model.Id
            });
            if (element == null)
            {
                throw new ArgumentNullException(nameof(element));
            }
            model.DepartureDate = element.DepartureDate;
            model.CargoId = element.CargoId;
            model.ArrivalDate = element.ArrivalDate;
            model.Status = element.Status;
            model.Count = element.Count;
            if (requiredStatus - model.Status == 1)
            {
                model.Status = requiredStatus;
                if (model.Status == TransportationStatus.Отгружен)
                    model.ArrivalDate = DateTime.Now;
                if (_transportationStorage.Update(model) == null)
                {
                    _logger.LogWarning("Update operation failed");
                    return false;
                }
                return true;
            }
            _logger.LogWarning("Changing status operation faled: Current-{Status}:required-{requiredStatus}.", model.Status, requiredStatus);
            throw new ArgumentException($"Невозможно присвоить статус {requiredStatus} заказу с текущим статусом {model.Status}");
        }
    }
}