using Microsoft.Extensions.Logging;
using SecuritySystemContracts.BindingModels;
using SecuritySystemContracts.BusinessLogicsContracts;
using SecuritySystemContracts.SearchModels;
using SecuritySystemContracts.StoragesContracts;
using SecuritySystemContracts.ViewModels;
using SecuritySystemDataModels.Models;
using System.Reflection;

namespace SecuritySystemBusinessLogic.BusinessLogics
{
    public class ShopLogic : IShopLogic
    {
        private readonly ILogger _logger;
        private readonly IShopStorage _shopStorage;

        public ShopLogic(ILogger<ShopLogic> logger, IShopStorage shopStorage)
        {
            _logger = logger;
            _shopStorage = shopStorage;
        }

        public ShopViewModel? ReadElement(ShopSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation("ReadElement. Shop Name:{0}, ID:{1}", model.Name, model.Id);

            var element = _shopStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement. element not found");
                return null;
            }

            _logger.LogInformation("ReadElement found. Id:{Id}", element.Id);

            return element;
        }

        public List<ShopViewModel>? ReadList(ShopSearchModel? model)
        {
            _logger.LogInformation("ReadList. Shop Name:{0}, ID:{1} ", model?.Name, 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 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);

            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.Name))
            {
                throw new ArgumentNullException("Нет названия магазина!", nameof(model.Name));
            }

            _logger.LogInformation("Shop. Name: {0}, Address: {1}, ID: {2}", model.Name, model.Address, model.Id);

            var element = _shopStorage.GetElement(new ShopSearchModel
            {
                Name = model.Name
            });

            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Магазин с таким названием уже есть");
            }
        }
        public bool SupplySecures(ShopSearchModel model, ISecureModel secure, int count)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (secure == null)
            {
                throw new ArgumentNullException(nameof(secure));
            }

            if (count <= 0)
            {
                throw new ArgumentNullException("Количество продукта для пополнения должно быть больше 0", nameof(count));
            }

            var shopElement = _shopStorage.GetElement(model);

            if (shopElement == null)
            {
                _logger.LogWarning("Required shop element not found in storage");
                return false;
            }

            _logger.LogInformation("Shop element found. ID: {0}, Name: {1}", shopElement.Id, shopElement.Name);

            if (shopElement.ShopSecures.TryGetValue(secure.Id, out var sameSecure))
            {
                shopElement.ShopSecures[secure.Id] = (secure, sameSecure.Item2 + count);
                _logger.LogInformation("Same secure found by supply. Added {0} of {1} in {2} shop", count, secure.SecureName, shopElement.Name);
            }
            else
            {
                shopElement.ShopSecures[secure.Id] = (secure, count);
                _logger.LogInformation("New secure added by supply. Added {0} of {1} in {2} shop", count, secure.SecureName, shopElement.Name);
            }

            _shopStorage.Update(new()
            {
                Id = shopElement.Id,
                Name = shopElement.Name,
                Address = shopElement.Address,
                OpeningDate = shopElement.OpeningDate,
                ShopSecures = shopElement.ShopSecures,
                MaxSecuresCount = shopElement.MaxSecuresCount
            });

            return true;
        }
        public bool SupplySecures(ISecureModel secure, int count) => throw new NotImplementedException();
        public bool SellSecures(ISecureModel model, int count) => throw new NotImplementedException();
        public bool CheckSecuresCount(ISecureModel model, int count)
        {
            int securesInShops = _shopStorage.GetFullList()
                .Select(
                    x => x.ShopSecures.Select(y => y.Value.Item1.Id == model.Id ? y.Value.Item2 : 0).Sum()
                ).Sum();
            return securesInShops >= count;
        }
        public bool CheckSupplySecures(ShopSearchModel shopSearchModel, int count)
        {
            if (shopSearchModel == null)
                throw new ArgumentNullException(nameof(shopSearchModel));

            if (secure == null)
                throw new ArgumentNullException(nameof(secure));

            var shop = _shopStorage.GetElement(shopSearchModel);

            if (shop == null)
            {
                _logger.LogWarning("Required shop element not found in storage");
                return false;
            }

            int securesInShop = _shopStorage.GetFullList().Select(x => x.ShopSecures.Select(y => y.Value.Item2).Sum()).Sum();

            return securesInShop + count <= shop.MaxSecuresCount;
        }
        public bool CheckSupplySecures(int count)
        {
            throw new NotImplementedException();
        }
    }
}