using PizzeriaContracts.BindingModels;
using PizzeriaContracts.BusinessLogicsContracts;
using PizzeriaContracts.SearchModels;
using PizzeriaContracts.StoragesContracts;
using PizzeriaContracts.ViewModels;
using Microsoft.Extensions.Logging;
using PizzeriaDataModels;

namespace PizzeriaBusinessLogic
{
    public class ShopLogic : IShopLogic
    {
        private readonly ILogger _logger;
        private readonly IShopStorage _shopStorage;
        public ShopLogic(ILogger<ShopLogic> logger, IShopStorage shopStorage)
        {
            _logger = logger;
            _shopStorage = shopStorage;
        }
        public List<ShopViewModel>? ReadList(ShopSearchModel? model)
        {
            _logger.LogInformation("ReadList. ShopName:{ShopName}. Id:{ Id}", model?.ShopName, model?.Id);
            var list = model == null ? _shopStorage.GetFullList() : _shopStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public ShopViewModel? ReadElement(ShopSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. ShopName:{ShopName}. Id:{ Id}", model.ShopName, model.Id);
            var element = _shopStorage.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(ShopBindingModel model)
        {
            CheckModel(model);
            if (_shopStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(ShopBindingModel model)
        {
            CheckModel(model);
            if (_shopStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(ShopBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_shopStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(ShopBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ShopName))
            {
                throw new ArgumentNullException("Нет названия магазина", nameof(model.ShopName));
            }
            if (string.IsNullOrEmpty(model.Addres))
            {
                throw new ArgumentNullException("Нет адреса магазина", nameof(model.ShopName));
            }
            _logger.LogInformation("Shop. ShopName:{ShopName}. Addres:{Addres}. Id: {Id}", model.ShopName, model.Addres, model.Id);
            var element = _shopStorage.GetElement(new ShopSearchModel
            {
                ShopName = model.ShopName
            });

            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Магазин с таким названием уже есть");
            }
        }

        public bool AddPizza(ShopSearchModel shop, IPizzaModel pizza, int count)
        {
            if (shop == null)
            {
                throw new ArgumentNullException(nameof(shop));
            }
            if (count <= 0)
            {
                throw new ArgumentException("Количество добавляемого изделия должно быть больше 0", nameof(count));
            }

            ShopViewModel model = _shopStorage.GetElement(shop);

            if(model.ShopPizzas.TryGetValue(pizza.Id, out var pair))
            {
                if(model.Capacity - pair.Item2 < count)
                {
                    throw new ArgumentException("Количество добавляемого изделия слишком велико");
                }
                model.ShopPizzas[pizza.Id] = (pair.Item1, pair.Item2 + count);
            } else
            {
                if (model.Capacity < count)
                {
                    throw new ArgumentException("Количество добавляемого изделия слишком велико");
                }
                model.ShopPizzas.Add(pizza.Id, (pizza, count));
            }

            _shopStorage.Update(new()
            {
                Id = model.Id,
                ShopName = model.ShopName,
                OpenTime = model.OpenTime,
                Addres = model.Addres,
                Capacity = model.Capacity,
                ShopPizzas = model.ShopPizzas,
            });

            return true;
        }

        public bool sellPizza(IPizzaModel pizza, int count)
        {
            bool result = _shopStorage.TrySellPizza(pizza, count);

            if(!result)
            {
                throw new ArgumentException("Количество продаваемого изделия слишком велико");
            }

            return result;
        }
    }
}