ISEbd-21_KashtanovD.A.FishFactory/FishFactory/FishFactoryFileImplement/Implements/OrderStorage.cs

using FishFactoryContracts.BindingModels;
using FishFactoryContracts.SearchModels;
using FishFactoryContracts.StoragesContracts;
using FishFactoryContracts.ViewModels;
using FishFactoryFileImplement.Models;

namespace FishFactoryFileImplement.Implements
{
    public class OrderStorage : IOrderStorage
	{
		private readonly DataFileSingleton source;

		public OrderStorage()
		{
			source = DataFileSingleton.GetInstance();
		}

		public List<OrderViewModel> GetFullList() => source.Orders.Select(x => AttachCannedName(x.GetViewModel)).ToList();

		public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
		{
			if (model.DateFrom.HasValue)
			{
				return source.Orders.Where(x => x.DateCreate >= model.DateFrom && x.DateCreate <= model.DateTo)
					.Select(x => GetViewModel(x)).ToList();
			}

			if (model.ClientId.HasValue && !model.Id.HasValue)
			{
				return source.Orders.Where(x => x.ClientId == model.ClientId).Select(x => x.GetViewModel).ToList();
			}

			if (!model.ImplementerId.HasValue && !model.Id.HasValue)
			{
				return source.Orders.Where(x => x.ImplementerId == model.ImplementerId).Select(x => x.GetViewModel).ToList();

			}

			if (model.Id.HasValue)
			{
				return source.Orders.Where(x => x.Id.Equals(model.Id)).Select(x => GetViewModel(x)).ToList();
			}
			return new();
		}

		public OrderViewModel? GetElement(OrderSearchModel model)
		{
			if (model.ImplementerId.HasValue)
			{
				return source.Orders.FirstOrDefault(x => x.ImplementerId == model.ImplementerId)?.GetViewModel;
			}
			if (!model.Id.HasValue)
			{
				return new();
			}
			return AttachCannedName(source.Orders.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel);
		}

		private OrderViewModel GetViewModel(Order order)
		{
			var viewModel = order.GetViewModel;

			var canned = source.Canneds.FirstOrDefault(x => x.Id == order.CannedId);
			var client = source.Clients.FirstOrDefault(x => x.Id == order.ClientId);

			if (canned != null)
			{
				viewModel.CannedName = canned.CannedName;
			}
			if (client != null)
			{
				viewModel.ClientFIO = client.ClientFIO;
			}
			return viewModel;
		}


		public OrderViewModel? Insert(OrderBindingModel model)
        {
            model.Id = source.Orders.Count > 0 ? source.Orders.Max(x => x.Id) + 1 : 1;
            var newOrder = Order.Create(model);
            if (newOrder == null)
            {
                return null;
            }
            source.Orders.Add(newOrder);
            source.SaveOrders();
            return AttachCannedName(newOrder.GetViewModel);
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (order == null)
            {
                return null;
            }
            order.Update(model);
            source.SaveOrders();
            return AttachCannedName(order.GetViewModel);
        }

        public OrderViewModel? Delete(OrderBindingModel model)
        {
            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (order != null)
            {
                source.Orders.Remove(order);
                source.SaveOrders();
                return AttachCannedName(order.GetViewModel);
            }
            return null;
        }

        private OrderViewModel? AttachCannedName(OrderViewModel? model)
        {
            if (model == null)
            {
                return null;
            }
            var canned = source.Canneds.FirstOrDefault(x => x.Id == model.CannedId);
                model.CannedName = canned?.CannedName;
            return model;
        }
    }

}