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

namespace HospitalBusinessLogic
{
    public class ApothecaryLogic : IApothecaryLogic
    {
        private readonly ILogger _logger;
        private readonly IApothecaryStorage _apothecaryStorage;

        public ApothecaryLogic(ILogger<ApothecaryLogic> logger, IApothecaryStorage apothecaryStorage)
        {
            _logger = logger;
            _apothecaryStorage = apothecaryStorage;
        }

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

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

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

        private void CheckModel(ApothecaryBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
           
            if (string.IsNullOrEmpty(model.Login))
            {
                throw new ArgumentNullException("Нет логина пользователя",
               nameof(model.Login));
            }
            if (string.IsNullOrEmpty(model.Password))
            {
                throw new ArgumentNullException("Нет пароля пользователя",
               nameof(model.Password));
            }
            if (model.Password.Length < 5 || model.Password.Length > 15)
            {
                throw new ArgumentNullException("Пароль должен иметь длину от 5 до 15 символов",
               nameof(model.Password));
            }
            _logger.LogInformation("Apothecary. Login:{ Login}. Id: { Id}", model.Login, model.Id);
            var element = _apothecaryStorage.GetElement(new ApothecarySearchModel { Login = model.Login });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Пользователь с таким логином уже есть");
            }
        }
    }
}