using SushiBarContracts.BindingModels;
using SushiBarContracts.ViewModels;
using SushiBarDataModels.Models;
using System.Reflection.Metadata;
using System.Xml.Linq;

namespace SushiBarFileImplement.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 int MaxCountSushi { get; private set; }
        public Dictionary<int, int> CountSushi 
        { 
            get; 
            private set;
        } = new();

        private Dictionary<int, (ISushiModel, int)>? _shopSushi = null;
        public Dictionary<int, (ISushiModel, int)> ListSushi
        {
            get
            {
                if (_shopSushi == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _shopSushi = 
                        CountSushi.ToDictionary(x => x.Key, 
                        y => ((source.ListSushi.FirstOrDefault(z => z.Id == y.Key) as ISushiModel)!, y.Value));
                }
                return _shopSushi;
            }
        }

        public static Shop? Create(ShopBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }
            return new Shop()
            {
                Id = model.Id,
                ShopName = model.ShopName,
                Address = model.Address,
                MaxCountSushi = model.MaxCountSushi,
                DateOpening = model.DateOpening,
                CountSushi = model.ListSushi.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }
        public static Shop? Create(XElement element)
        {
            if (element == null)
            {
                return null;
            }
            return new()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                ShopName = element.Element("ShopName")!.Value,
                Address = element.Element("Address")!.Value,
                DateOpening = Convert.ToDateTime(element.Element("DateOpening")!.Value),
                MaxCountSushi = Convert.ToInt32(element.Element("MaxCountSushi")!.Value),
                CountSushi = element.Element("ListSushi")!.Elements("Sushi").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;
            MaxCountSushi = model.MaxCountSushi;
            CountSushi = model.ListSushi.ToDictionary(x => x.Key, x => x.Value.Item2);
            _shopSushi = null;
        }
        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            ShopName = ShopName,
            Address = Address,
            ListSushi = ListSushi,
            DateOpening = DateOpening,
            MaxCountSushi = MaxCountSushi,
        };
        public XElement GetXElement => new("Shop",
             new XAttribute("Id", Id),
             new XElement("ShopName", ShopName),
             new XElement("Address", Address),
             new XElement("DateOpening", DateOpening),
             new XElement("MaxCountSushi", MaxCountSushi),
             new XElement("ListSushi", CountSushi
                 .Select(x => new XElement("Sushi",
                     new XElement("Key", x.Key),
                     new XElement("Value", x.Value))
                 ).ToArray()));
    }
}