using FurnitureAssemblyContracts.BindingModels;
using FurnitureAssemblyContracts.BusinessLogicsContracts;
using FurnitureAssemblyContracts.SearchModels;
using FurnitureAssemblyContracts.StoragesContracts;
using FurnitureAssemblyContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FurnitureAssemblyBusinessLogic.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 bool Create(ProductBindingModel model)
        {
            CheckModel(model);

            if (_productStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert 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;
        }

        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 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 bool Update(ProductBindingModel model)
        {
            CheckModel(model);

            if (_productStorage.Update(model) == null)
            {
                _logger.LogWarning("Update 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 изделия", nameof(model.ProductName));
            }

            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Цена изделия должна быть больше 0", nameof(model.Price));
            }

            _logger.LogInformation("Product. ProductName:{ProductName}.Price:{ Cost}. 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("Изделие с таким названием уже есть");
            }
        }
    }
}