using GiftShopContracts.BindingModels;
using GiftShopContracts.SearchModels;
using GiftShopContracts.StoragesContracts;
using GiftShopContracts.ViewModels;
using GiftShopDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;

namespace GiftShopDatabaseImplement.Implements
{
	public class OrderStorage : IOrderStorage
	{
		public OrderViewModel? Delete(OrderBindingModel model)
		{
			using var context = new GiftShopDatabase();
			var element = context.Orders.FirstOrDefault(rec => rec.Id == model.Id);
			if (element != null)
			{
				context.Orders.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}

		public OrderViewModel? GetElement(OrderSearchModel model)
		{
			using var context = new GiftShopDatabase();
			return context.Orders.Include(x => x.Gift).Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(
				x => ((model.Id.HasValue && x.Id == model.Id) ||
				(x.ImplementerId == model.ImplementerId && x.Status == model.Status)))?.GetViewModel;
		}

		public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
		{
			if (model is null)
			{
				return new();
			}
			using var context = new GiftShopDatabase();
			return context.Orders
			.Include(x => x.Gift)
				.Include(x => x.Client).Include(x => x.Implementer).Where(x => (
						(!model.Id.HasValue || x.Id == model.Id) &&
						(!model.DateFrom.HasValue || x.DateCreate >= model.DateFrom) &&
						(!model.DateTo.HasValue || x.DateCreate <= model.DateTo)
						&&
						(!model.ClientId.HasValue || x.ClientId == model.ClientId)
					)
				)
		   .Select(x => x.GetViewModel)
		   .ToList();
		}

		public List<OrderViewModel> GetFullList()
		{
			using var context = new GiftShopDatabase();
			return context.Orders.Include(x => x.Gift)
				.Include(x => x.Client).Include(x => x.Implementer).Select(x => x.GetViewModel).ToList();
		}

		public OrderViewModel? Insert(OrderBindingModel model)
		{
			using var context = new GiftShopDatabase();
			var newOrder = Order.Create(model, context);
			if (newOrder == null)
			{
				return null;
			}
			context.Orders.Add(newOrder);
			context.SaveChanges();

			return context.Orders
						  .Include(x => x.Gift)
						  .Include(x => x.Client)
						  .Include(x => x.Implementer)
						  .FirstOrDefault(x => x.Id == newOrder.Id)
						  ?.GetViewModel;
		}

		public OrderViewModel? Update(OrderBindingModel model)
		{
			using var context = new GiftShopDatabase();
			var order = context.Orders.Include(x => x.Gift)
				.Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(x => x.Id == model.Id);
			if (order == null)
			{
				return null;
			}
			order.Update(model);
			context.SaveChanges();
			return order.GetViewModel;
		}
	}
}