using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDataModels.Models;
using System.Xml.Linq;
namespace ConfectioneryFileImplement.Models
{
	public class Shop : IShopModel
	{
		public int Id { get; private set; }
		public string ShopName { get; private set; } = string.Empty;
		public string Address { get; private set; } = string.Empty;
		public DateTime DateOpen { get; private set; }
		public int MaxCapacity { get; private set; }
		public Dictionary<int, int> Pastries { get; private set; } = new();
		private Dictionary<int, (IPastryModel, int)>? _shopPastries = null;
		public Dictionary<int, (IPastryModel, int)> ShopPastries
		{
			get
			{
				if (_shopPastries == null)
				{
					var source = DataFileSingleton.GetInstance();
					_shopPastries = Pastries.ToDictionary(
						x => x.Key, y => ((source.Pastries
						.FirstOrDefault(z => z.Id == y.Key) as IPastryModel)!,
					y.Value));
				}
				return _shopPastries;
			}
		}
		public static Shop? Create(ShopBindingModel model)
		{
			if (model == null)
				return null;
			return new Shop()
			{
				Id = model.Id,
				ShopName = model.ShopName,
				Address = model.Address,
				DateOpen = model.DateOpen,
				MaxCapacity = model.MaxCapacity,
				Pastries = model.ShopPastries.ToDictionary(
					x => x.Key, x => x.Value.Item2)
			};
		}
		public static Shop? Create(XElement element)
		{
			if (element == null)
			{
				return null;
			}
			return new Shop()
			{
				Id = Convert.ToInt32(element.Attribute("Id")!.Value),
				ShopName = element.Element("ShopName")!.Value,
				Address = element.Element("Address")!.Value,
				MaxCapacity = Convert.ToInt32(
					element.Element("MaxCapacity")!.Value),
				DateOpen = Convert.ToDateTime(
					element.Element("DateOpen")!.Value),
				Pastries = element
					.Element("ShopPastries")!.Elements("ShopPastry")
					.ToDictionary(x => 
					Convert.ToInt32(x.Element("Key")?.Value), 
					x => Convert.ToInt32(x.Element("Value")?.Value))
			};
		}
		public void Update(ShopBindingModel model)
		{
			if (model == null)
			{
				return;
			}
			ShopName = model.ShopName;
			Address = model.Address;
			DateOpen = model.DateOpen;
			MaxCapacity = model.MaxCapacity;
			if (model.ShopPastries.Count > 0)
			{
				Pastries = model.ShopPastries
					.ToDictionary(x => x.Key, x => x.Value.Item2);
				_shopPastries = null;
			}
		}
		public ShopViewModel GetViewModel => new()
		{
			Id = Id,
			ShopName = ShopName,
			Address = Address,
			DateOpen = DateOpen,
			MaxCapacity = MaxCapacity,
			ShopPastries = ShopPastries
		};
		public XElement GetXElement => new("Shop",
			new XAttribute("Id", Id),
			new XElement("ShopName", ShopName),
			new XElement("Address", Address),
			new XElement("DateOpen", DateOpen),
			new XElement("MaxCapacity", MaxCapacity),
			new XElement("ShopPastries", Pastries
				.Select(x => new XElement("ShopPastry", 
					new XElement("Key", x.Key), 
					new XElement("Value", x.Value))).ToArray()));
	}
}