using FurnitureAssemblyDataModels.Models;
using FurnitureAssemblyContracts.BindingModels;
using FurnitureAssemblyContracts.ViewModels;
using FurnitureAssemFileImplement;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace FurnitureAssemblyFileImplement.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; }

        private Dictionary<int, (IFurnitureModel, int)>? _furnitures = null;
        public Dictionary<int, (IFurnitureModel, int)> Furnitures
        {
            get
            {
                if (_furnitures == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _furnitures = CurrentCount.ToDictionary(
                        x => x.Key,
                        y => (source.Furnitures.FirstOrDefault(z => z.Id == y.Key)! as IFurnitureModel, y.Value));

                }
                return _furnitures;
            }
            private set { }
        }
        public int MaxCount { get; private set; }

        public Dictionary<int, int> CurrentCount { get; private set; } = new();

        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,
                MaxCount = model.MaxCount,
                CurrentCount = model.Furnitures.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),
                MaxCount = Convert.ToInt32(element.Element("MaxCount")!.Value),
                CurrentCount = element.Element("CurrentCount")!.Elements("CurrentCountFurniture")
                    .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;
            MaxCount = model.MaxCount;
            DateOpening = model.DateOpening;
            if (model.Furnitures.Count > 0)
            {
                CurrentCount = model.Furnitures.ToDictionary(x => x.Key, x => x.Value.Item2);
                _furnitures = null;
            }
        }

        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            ShopName = ShopName,
            Address = Address,
            DateOpening = DateOpening,
            MaxCount = MaxCount,
            Furnitures = Furnitures
        };

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