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


namespace ElectronicsShopBusinessLogic.BusinessLogic
{
    public class CostItemLogic : ICostItemLogic
    {
        private readonly ILogger _logger;
        private readonly ICostItemStorage _storage;

        public CostItemLogic(ILogger<CostItemLogic> logger, ICostItemStorage storage) {
            _logger = logger;
            _storage = storage;
        }

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

        public bool Delete(CostItemBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation($"Delete.ID:{model.ID}");
            if (_storage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public CostItemViewModel? ReadElement(CostItemSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation($"ReadElement.Name:{model.Name}.ID:{model.ID}");
            var element = _storage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement. element not fount");
                return null;
            }
            _logger.LogInformation($"ReadElement.find.ID:{element.ID}");
            return element;
        }

        public List<CostItemViewModel>? ReadList(CostItemSearchModel model)
        {
            _logger.LogInformation($"ReadList. ClientID:{model?.ID}");
            var list = model == null ? _storage.GetFullList() : _storage.GetFillteredList(model); ;
            if (list == null)
            {
                _logger.LogWarning("ReadList. return null list");
                return null;
            }
            _logger.LogInformation($"ReadList.Count:{list.Count}");
            return list;
        }

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

        private void CheckModel(CostItemBindingModel model, bool withParams = true)
        {
            if (!withParams)
            {
                return;
            }
            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Затраты должны быть больше 0", nameof(model.Price));
            }
            if (string.IsNullOrEmpty(model.Name)) {
                throw new ArgumentNullException("Отсутствует название статьи затрат", nameof(model.Price));
            }
            _logger.LogInformation($"CostItem. ID:{model.ID}.EmployeeID:{model.EmployeeID}.Name:{model.Name}.Price:{model.Price}");
            var element = _storage.GetElement(new CostItemSearchModel { ID = model.ID });
            if (element != null && element.ID != model.EmployeeID)
            {
                throw new InvalidOperationException("Такая статья затрат уде есть");
            }
        }
    }
}