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

namespace PolyclinicBusinessLogic.BusinessLogics
{
    public class DiagnoseLogic : IDiagnoseLogic
    {
        private ILogger _logger;
        private IDiagnoseStorage _diagnoseStorage;

        public DiagnoseLogic(ILogger<DiagnoseLogic> logger, IDiagnoseStorage diagnoseStorage)
        {
            _logger = logger;
            _diagnoseStorage = diagnoseStorage;
        }

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

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

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

        public List<DiagnoseViewModel> ReadList(DiagnoseSearchModel? model = null)
        {
            _logger.LogInformation("ReadList. Name:{Name} Id:{Id}, UserId:{UserId}", model?.Name, model?.Id, model?.UserId);
            var list = model == null ? _diagnoseStorage.GetFullList() : _diagnoseStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return new List<DiagnoseViewModel>();
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool Update(DiagnoseBindingModel model)
        {
            CheckModel(model);
            if (_diagnoseStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(DiagnoseBindingModel 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 болезни", nameof(model.Name));
            }
            _logger.LogInformation("Diagnose. Name:{Name}. Id: {Id}", model.Name, model.Id);
            var element = _diagnoseStorage.GetElement(new DiagnoseSearchModel
            {
                Name = model.Name
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Болезнь с таким названием уже есть");
            }
        }
    }
}