using FlowerShopContracts.BindingModels;
using FlowerShopContracts.ViewModels;
using FlowerShopDataModels.Models;
using System.Xml.Linq;

namespace FlowerShopFileImplement.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 DateOpening { get; private set; }
		public Dictionary<int, int> Flowers { get; private set; } = new();
		private Dictionary<int, (IFlowerModel, int)> _shopFlowers = null;
		public Dictionary<int, (IFlowerModel, int)> ShopFlowers 
		{
			get
			{
				if (_shopFlowers == null)
				{
					var source = DataFileSingleton.GetInstance();
					_shopFlowers = Flowers.ToDictionary(x => x.Key,
						y => ((source.Flowers.FirstOrDefault(z => z.Id == y.Key) as IFlowerModel)!, y.Value));
				}
				return _shopFlowers;
			}
		}
		public int MaximumFlowers { get; private set; }
		public static Shop? Create(ShopBindingModel model)
		{
			if (model == null) return null;
			return new Shop()
			{
				Id = model.Id,
				ShopName = model.ShopName,
				Address = model.Address,
				DateOpening = model.DateOpening,
				Flowers = model.ShopFlowers.ToDictionary(x => x.Key, x => x.Value.Item2),
				MaximumFlowers = model.MaximumFlowers,
			};
		}
		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,
				DateOpening = Convert.ToDateTime(element.Element("DateOpening")!.Value),
				MaximumFlowers = Convert.ToInt32(element.Element("MaximumFlowers")!.Value),
				Flowers = element.Element("ShopFlowers")!.Elements("ShopFlower")
								.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;
			DateOpening = model.DateOpening;
			MaximumFlowers = model.MaximumFlowers;
			Flowers = model.ShopFlowers.ToDictionary(x => x.Key, x => x.Value.Item2);
			_shopFlowers = null;
		}
		public ShopViewModel GetViewModel => new()
		{
			Id = Id,
			ShopName = ShopName,
			Address = Address,
			DateOpening = DateOpening,
			MaximumFlowers = MaximumFlowers,
			ShopFlowers = ShopFlowers,
		};

		public XElement GetXElement => new("Shop",
						new XAttribute("Id", Id),
						new XElement("ShopName", ShopName),
						new XElement("Address", Address),
						new XElement("DateOpening", DateOpening.ToString()),
						new XElement("MaximumFlowers", MaximumFlowers.ToString()),
						new XElement("ShopFlowers",
							Flowers.Select(x => new XElement("ShopFlower",
																new XElement("Key", x.Key),
																new XElement("Value", x.Value))).ToArray()));
	}
}