using Microsoft.Extensions.Logging;
using PizzeriaContracts.BindingModels;
using PizzeriaContracts.BusinessLogicsContracts;
using PizzeriaContracts.SearchModels;
using PizzeriaContracts.StorageContracts;
using PizzeriaContracts.ViewModels;


namespace PizzeriaBusinessLogic.BusinessLogic
{
    public class ProductLogic : IProductLogic
    {
        private readonly ILogger _logger;
        private readonly IProductStorage _productStorage;
        public ProductLogic(ILogger<ProductLogic> logger, IProductStorage ProductStorage)
        {
            //_logger = logger;
            _productStorage = ProductStorage;
        }
        public List<ProductViewModel>? ReadList(ProductSearchModel? model)
        {
            _logger.LogInformation("ReadList. ProductName:{ProductName}.Id:{ Id}", model?.ProductName, model?.Id);
            var list = model == null ? _productStorage.GetFullList() :
            _productStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public ProductViewModel? ReadElement(ProductSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. ProductName:{ProductName}.Id:{ Id} ", model.ProductName, model.Id);
            var element = _productStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
            return element;
        }
        public bool Create(ProductBindingModel model)
        {
            CheckModel(model);
            if (_productStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(ProductBindingModel model)
        {
            CheckModel(model);
            if (_productStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(ProductBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_productStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(ProductBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ProductName))
            {
                throw new ArgumentNullException("Нет названия продукта", nameof(model.ProductName));
            }
            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Цена продукта должна быть больше 0", nameof(model.Price));
            }
            _logger.LogInformation("Product. ProductName:{ProductName}.Price:{ Price}. Id: { Id}", model.ProductName, model.Price, model.Id);
            var element = _productStorage.GetElement(new ProductSearchModel { ProductName = model.ProductName });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Продукт с таким названием уже есть");
            }
        }
    }
}