using Microsoft.Extensions.Logging;
using VeterinaryClinicContracts.BindingModels;
using VeterinaryClinicContracts.BusinessLogicsContracts;
using VeterinaryClinicContracts.SearchModels;
using VeterinaryClinicContracts.StorageContracts;
using VeterinaryClinicContracts.ViewModels;

namespace VeterinaryClinicBusinessLogic.BusinessLogics
{
    public class MedicationLogic : IMedicationLogic
    {
        private readonly ILogger _logger;
        private readonly IMedicationStorage _MedicationStorage;
        public MedicationLogic(ILogger<MedicationLogic> logger, IMedicationStorage
       MedicationStorage)
        {
            _logger = logger;
            _MedicationStorage = MedicationStorage;
        }
        public List<MedicationViewModel>? ReadList(MedicationSearchModel? model)
        {
            _logger.LogInformation("ReadList. MedicationName:{MedicationName}.Id:{ Id}", model?.MedicationName, model?.Id);
            var list = model == null ? _MedicationStorage.GetFullList() : _MedicationStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public MedicationViewModel? ReadElement(MedicationSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. MedicationName:{MedicationName}.Id:{ Id}", model.MedicationName, model.Id);
            var element = _MedicationStorage.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(MedicationBindingModel model)
        {
            CheckModel(model);
            if (_MedicationStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(MedicationBindingModel model)
        {
            CheckModel(model);
            if (_MedicationStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(MedicationBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_MedicationStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(MedicationBindingModel model, bool withParams =
       true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.MedicationName))
            {
                throw new ArgumentNullException("Нет названия компонента",
               nameof(model.MedicationName));
            }
            if (model.Cost <= 0)
            {
                throw new ArgumentNullException("Цена компонента должна быть больше 0", nameof(model.Cost));
            }
            _logger.LogInformation("Medication. MedicationName:{MedicationName}. Cost:{ Cost}. Id: { Id}", model.MedicationName, model.Cost, model.Id);
            var element = _MedicationStorage.GetElement(new MedicationSearchModel
            {
                MedicationName = model.MedicationName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Компонент с таким названием уже есть");
            }
        }
    }
}