using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.StoragesContracts;
using CanteenContracts.View;
using CanteenDataModels.Models;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenBusinessLogic.BusinessLogics
{
    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 AddCooksToProduct(ProductSearchModel model, ICookModel cook)
        {
            var product = _productStorage.GetElement(model);
            product.ProductCooks[cook.Id] = cook;
            if (_productStorage.Update(new()
            {
                Id = product.Id,
                ProductName = product.ProductName,
                Price = product.Price,
                ManagerId = product.ManagerId,
                ProductCooks = product.ProductCooks

            }) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }

            return true;
        }

        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 продукта", nameof(model.ProductName));
            }

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

            if (model.ManagerId <= 0)
            {
                throw new ArgumentNullException("id менеджера должен быть больше 0", nameof(model.ManagerId));
            }

            _logger.LogInformation("Product. ProductName: {ProductName}. Price: {Price}. ManagerId: {ManagerId}. Id: {Id}", model.ProductName, model.Price, model.ManagerId, model.Id);

            var element = _productStorage.GetElement(new ProductSearchModel { ProductName = model.ProductName });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Такое продукт уже есть");
            }
        }
    }
}