using Microsoft.Extensions.Logging;
using TravelCompanyContracts.BindingModels;
using TravelCompanyContracts.BusinessLogicsContracts;
using TravelCompanyContracts.SearchModels;
using TravelCompanyContracts.StoragesContracts;
using TravelCompanyContracts.ViewModels;
using TravelCompanyDataModels.Enums;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TravelCompanyContracts.BusinessLogicContracts;
using TravelCompanyDataModels.Models;

namespace TravelCompanyBusinessLogic.BusinessLogic
{
    public class ShopLogic : IShopLogic
    {
        private readonly ILogger _logger;
        private readonly IShopStorage _shopStorage;
        private readonly ITravelStorage _travelStorage;

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

        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;
        }

        public bool MakeDelivery(ShopSearchModel model, ITravelModel travel, int count)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
			if (travel == null)
			{
				throw new ArgumentNullException(nameof(travel));
			}
			if (count <= 0)
            {
                throw new ArgumentException("Количество изделий должно быть больше 0");
            }
            var shop = _shopStorage.GetElement(model);
            if (shop == null)
            {
                throw new ArgumentException("Магазина не существует");
            }
			if (shop.TravelsMaximum - shop.ShopTravels.Sum(x => x.Value.Item2) < count)
			{
				_logger.LogWarning("MakeShipment error. No space for new ice creams");
				return false;
			}
			if (shop.ShopTravels.ContainsKey(travel.Id))
            {
				var shopIC = shop.ShopTravels[travel.Id];
				shopIC.Item2 += count;
				shop.ShopTravels[travel.Id] = shopIC;
				_logger.LogInformation("MakeDelivery. Added {count} '{travel}' to '{ShopName}' shop", count, travel.TravelName,
					shop.ShopName);
			}
            else
            {
				shop.ShopTravels.Add(travel.Id, (travel, count));
				_logger.LogInformation("MakeDelivery. Added {count} new '{travel}' to '{ShopName}' shop", count, travel.TravelName,
					shop.ShopName);
			}
            if (_shopStorage.Update(new ShopBindingModel()
            {
                Id = shop.Id,
                ShopName = shop.ShopName,
                Address = shop.Address,
                OpeningDate = shop.OpeningDate,
                TravelsMaximum = shop.TravelsMaximum,
                ShopTravels = shop.ShopTravels,
			}) == null)
			{
				_logger.LogWarning("MakeDelivery. Update operation failed");
				return false;
			}
			return true;
        }

		public bool MakeSale(ITravelModel model, int count)
		{
			return _shopStorage.MakeSale(model, count);
		}

		private void CheckModel(ShopBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Address))
            {
                throw new ArgumentException("Адрес магазина длжен быть заполнен", nameof(model.Address));
            }
            if (string.IsNullOrEmpty(model.ShopName))
            {
                throw new ArgumentException("Название магазина должно быть заполнено", nameof(model.ShopName));
            }
            _logger.LogInformation("Shop. ShopName:{ShopName}.Adres:{Adres}.OpeningDate:{OpeningDate}.Id:{ Id}", model.ShopName, model.Address, model.OpeningDate, 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");
            }
        }
    }
}