PIbd-21_BatylkinaAO_FurnitureAssembly/FurnitureAssembly/FurnitureAssemblyFileImplement/Implements/ShopStorage.cs

using FurnitureAssemblyContracts.BindingModels;
using FurnitureAssemblyContracts.SearchModels;
using FurnitureAssemblyContracts.StoragesContracts;
using FurnitureAssemblyContracts.ViewModels;
using FurnitureAssemblyFileImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FurnitureAssemFileImplement.Implements
{
    public class ShopStorage : IShopStorage
    {
        private readonly DataFileSingleton source;
        public ShopStorage()
        {
            source = DataFileSingleton.GetInstance();
        }

        public List<ShopViewModel> GetFullList()
        {
            return source.Shops.Select(x => x.GetViewModel).ToList();
        }

        public List<ShopViewModel> GetFilteredList(ShopSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ShopName))
            {
                return new();
            }

            return source.Shops.Where(x => x.ShopName.Equals(model.ShopName)).Select(x => x.GetViewModel).ToList();
        }

        public ShopViewModel? GetElement(ShopSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ShopName) && !model.Id.HasValue)
            {
                return null;
            }

            return source.Shops.FirstOrDefault(x =>
           (model.Id.HasValue && x.Id == model.Id) || (!string.IsNullOrEmpty(model.ShopName) && x.ShopName == model.ShopName))?.GetViewModel;
        }

        public ShopViewModel? Insert(ShopBindingModel model)
        {
            model.Id = source.Shops.Count > 0 ? source.Shops.Max(x => x.Id) + 1 : 1;

            var newShop = Shop.Create(model);
            if (newShop == null)
            {
                return null;
            }
            source.Shops.Add(newShop);
            source.SaveShops();
            return newShop.GetViewModel;
        }

        public ShopViewModel? Update(ShopBindingModel model)
        {
            var shop = source.Shops.FirstOrDefault(x => x.Id == model.Id);
            if (shop == null)
            {
                return null;
            }

            shop.Update(model);
            source.SaveShops();
            return shop.GetViewModel;
        }

        public ShopViewModel? Delete(ShopBindingModel model)
        {
            var element = source.Shops.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                source.Shops.Remove(element);
                source.SaveShops();
                return element.GetViewModel;
            }
            return null;
        }
        private int GetCountFurnitureAllShops(FurnitureBindingModel furniture)
        {
            int count = 0;
            foreach (var shop in source.Shops)
            {
                if (shop.Furnitures.ContainsKey(furniture.Id))
                {
                    count += shop.Furnitures[furniture.Id].Item2;
                }
            }
            return count;
        }


        public bool Sell(FurnitureBindingModel furniture, int count)
        {
            if (GetCountFurnitureAllShops(furniture) < count)
            {
                return false;
            }


            foreach (var shop in source.Shops)
            {
                if (shop.Furnitures.ContainsKey(furniture.Id))
                {
                    if (shop.Furnitures[furniture.Id].Item2 > count)
                    {
                        shop.Furnitures[furniture.Id] = (shop.Furnitures[furniture.Id].Item1, shop.Furnitures[furniture.Id].Item2 - count);
                        shop.Update(new ShopBindingModel
                        {
                            Id = shop.Id,
                            ShopName = shop.ShopName,
                            MaxCount = shop.MaxCount,
                            Furnitures = shop.Furnitures,
                            Address = shop.Address,
                            DateOpening = shop.DateOpening,
                        });
                        break;
                    }
                    count -= shop.Furnitures[furniture.Id].Item2;
                    shop.Furnitures[furniture.Id] = (shop.Furnitures[furniture.Id].Item1, 0);
                    shop.Update(new ShopBindingModel
                    {
                        Id = shop.Id,
                        ShopName = shop.ShopName,
                        MaxCount = shop.MaxCount,
                        Furnitures = shop.Furnitures,
                        Address = shop.Address,
                        DateOpening = shop.DateOpening,
                    });
                }
            }
            source.SaveShops();
            return true;
        }
    }
}