using SewingDressesContracts.BindingModels;
using SewingDressesContracts.ViewModels;
using SewingDressesDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace SewingDressesDatabaseImplement.Models
{
	public class Shop : IShopModel
	{
		public int Id { get; private set; }
		[Required]
		public string ShopName { get; private set; }
		[Required]
		public string Adress { get; private set; }
		[Required]
		public DateTime DateOpen { get; private set; }
		[Required]
		public int MaxCount { get; private set; }
		private Dictionary<int, (IDressModel, int)>? _shopDresses = null;
		[NotMapped]
		public Dictionary<int, (IDressModel, int)>? ShopDresses
		{
			get
			{
				if ( _shopDresses == null )
				{
					_shopDresses = Dresses.ToDictionary(x => x.DressId, x => (x.Dress as IDressModel, x.Count));
				}
				return _shopDresses;
			}
		}
		[ForeignKey("ShopId")]
		public virtual List<ShopDress> Dresses { get; set; } = new();
		public static Shop? Create(SewingDressesDatabase context, ShopBindingModel model)
		{
			if (model == null)
				return null;
			return new Shop()
			{
				Id = model.Id,
				ShopName = model.ShopName,
				Adress = model.Adress,
				DateOpen = model.DateOpen,
				MaxCount = model.MaxCount,
				Dresses = model.ShopDresses.Select(x => new ShopDress
				{
					Dress = context.Dresses.First(y => y.Id == x.Key),
					Count = x.Value.Item2
				}).ToList()
			};
		}
		public void Update(ShopBindingModel? model) 
		{
			if (model == null )
				return;
			ShopName = model.ShopName;
			Adress = model.Adress;
			DateOpen = model.DateOpen;
			MaxCount = model.MaxCount;
		}
		public ShopViewModel GetViewModel => new()
		{ 
			Id = Id,
			ShopName = ShopName,
			Adress = Adress,
			DateOpen = DateOpen,
			MaxCount = MaxCount,
			ShopDresses = ShopDresses
		};

		public void UpdateDresses(SewingDressesDatabase context, ShopBindingModel model)
		{
			var shopDresses = context.ShopDresses.Where(rec => rec.ShopId == model.Id).ToList();
			if (shopDresses != null && shopDresses.Count > 0)
			{
				context.ShopDresses.RemoveRange(shopDresses.Where(rec => !model.ShopDresses.ContainsKey(rec.DressId)));
				context.SaveChanges();
				foreach (var uDress in shopDresses)
				{
					uDress.Count = model.ShopDresses[uDress.DressId].Item2;
					model.ShopDresses.Remove(uDress.DressId);
				}
				context.SaveChanges();
			}
			var shop = context.Shops.First(x => x.Id == Id);
			foreach (var pc in model.ShopDresses)
			{
				context.ShopDresses.Add(new ShopDress
				{
					Shop = shop,
					Dress = context.Dresses.First(x => x.Id == pc.Key),
					Count = pc.Value.Item2
				});
				context.SaveChanges() ;
			}
			_shopDresses = null;
		}
	}
}