using SushiBarContracts.BindingModel;
using SushiBarContracts.ViewModels;
using SushiBarDataModels;
using SushiBarDataModels.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace SushiBarFileImplement.Models
{
    public class Shop : IShopModel
    {
        public int Id { get; private set; }
        public string ShopName { get; private set; }
        public string Address { get; private set; }
        public DateTime DateOpening { get; private set; }
        public int MaxCountSushis { get; private set; }
        public Dictionary<int, int> Sushis { get; private set; } = new();

        private Dictionary<int, (ISushiModel, int)>? _shopSushis = null;
        public Dictionary<int, (ISushiModel, int)> ShopSushis
        {
            get
            {
                if (_shopSushis == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _shopSushis = Sushis.ToDictionary(x => x.Key, y => ((source.Sushis.FirstOrDefault(z => z.Id == y.Key) as ISushiModel)!, y.Value));
                }
                return _shopSushis;
            }
        }
        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,
                MaxCountSushis = model.MaxCountSushis,
                Sushis = model.ShopSushis.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,
                MaxCountSushis = Convert.ToInt32(element.Element("MaxCountSushis")!.Value),
                DateOpening = Convert.ToDateTime(element.Element("DateOpening")!.Value),
                Sushis = element.Element("ShopSushis")!.Elements("ShopSushis").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;
            MaxCountSushis = model.MaxCountSushis;
            if (model.ShopSushis.Count > 0)
            {
                Sushis = model.ShopSushis.ToDictionary(x => x.Key, x => x.Value.Item2);
                _shopSushis = null;
            }
        }
        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            ShopName = ShopName,
            Address = Address,
            DateOpening = DateOpening,
            MaxCountSushis = MaxCountSushis,
            ShopSushis = ShopSushis
        };

        public XElement GetXElement => new XElement("Shop",
            new XAttribute("Id", Id),
            new XElement("ShopName", ShopName),
            new XElement("Address", Address),
            new XElement("DateOpening", DateOpening),
            new XElement("MaxCountSushis", MaxCountSushis),
            new XElement("ShopSushis", Sushis.Select(x => new XElement("ShopSushis", new XElement("Key", x.Key), new XElement("Value", x.Value))).ToArray()));
    }
}