using HospitalContracts.BindingModels;
using HospitalContracts.BusinessLogicContracts;
using HospitalContracts.SearchModels;
using HospitalContracts.StorageContracts;
using HospitalContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace HospitalBusinessLogic
{
    public class TreatmentLogic : ITreatmentLogic
    {
        private readonly ILogger _logger;
        private readonly ITreatmentStorage _treatmentStorage;

        public TreatmentLogic(ILogger<TreatmentLogic> logger, ITreatmentStorage treatmentStorage)
        {
            _logger = logger;
            _treatmentStorage = treatmentStorage;
        }

        public TreatmentViewModel? ReadElement(TreatmentSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
            var element = _treatmentStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
            return element;
        }

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

        public bool Create(TreatmentBindingModel model)
        {
            CheckModel(model);
            if (_treatmentStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

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

        private void CheckModel(TreatmentBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет названия лечения",
               nameof(model.Name));
            }

            _logger.LogInformation("Treatment. Name: {Name}.Id: { Id}", model.Name, model.Id);
        }
    }
}