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

namespace HospitalBusinessLogic
{
    public class PrescriptionLogic : IPrescriptionLogic
    {
        private readonly ILogger _logger;
        private readonly IPrescriptionStorage _prescriptionStorage;

        public PrescriptionLogic(ILogger<PrescriptionLogic> logger, IPrescriptionStorage prescriptionStorage)
        {
            _logger = logger;
            _prescriptionStorage = prescriptionStorage;
        }

        public PrescriptionViewModel? ReadElement(PrescriptionSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
            var element = _prescriptionStorage.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<PrescriptionViewModel>? ReadList(PrescriptionSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{ Id}",  model?.Id);
            var list = model == null ? _prescriptionStorage.GetFullList() : _prescriptionStorage.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(PrescriptionBindingModel model)
        {
            CheckModel(model);
            if (_prescriptionStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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


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

        private void CheckModel(PrescriptionBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Number <= 0)
            {
                throw new ArgumentNullException("Количество лекарств в поставке должно быть больше 0", nameof(model.Number));
            }
            _logger.LogInformation("Prescription. Date:{ Date}. Number: {Number}. MedicineId: {MedicineId}. Id: { Id}", model.Date, model.Number, model.MedicineId, model.Id);
        }
    }
}