using Microsoft.Extensions.Logging;
using PolyclinicContracts.BindingModels;
using PolyclinicContracts.BusinessLogicsContracts;
using PolyclinicContracts.SearchModels;
using PolyclinicContracts.StoragesContracts;
using PolyclinicContracts.ViewModels;

namespace PolyclinicBusinessLogic.BusinessLogics
{
    public class SymptomLogic : ISymptomLogic
    {
        private ILogger _logger;
        private ISymptomStorage _symptomStorage;

        public SymptomLogic(ILogger logger, ISymptomStorage symptomStorage)
        {
            _logger = logger;
            _symptomStorage = symptomStorage;
        }

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

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

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

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

        public bool Update(SymptomBindingModel model)
        {
            CheckModel(model);
            if (_symptomStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(SymptomBindingModel 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 симптома", nameof(model.Name));
            }
            _logger.LogInformation("Symptom. Name:{Name}. Id: {Id}", model.Name, model.Id);
            var element = _symptomStorage.GetElement(new SymptomSearchModel
            {
                Name = model.Name
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Симптом с таким названием уже есть");
            }
        }
    }
}