using AutomobilePlantContracts.BindingModels;
using AutomobilePlantContracts.ViewModels;
using AutomobilePlantDataModels.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace AutomobilePlantFileImplement.Models
{
    public class Shop : IShopModel
    {
        public int Id { get; private set; }

        public string Name { get; private set; } = string.Empty;

        public string Address { get; private set; } = string.Empty;

        public int MaxCountCars { get; private set; }

        public DateTime OpeningDate { get; private set; }

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

        private Dictionary<int, (ICarModel, int)>? _shopCars = null;

        public Dictionary<int, (ICarModel, int)> ShopCars
        {
            get
            {
                if (_shopCars == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _shopCars = Cars.ToDictionary(
                        x => x.Key,
                        y => ((source.Cars.FirstOrDefault(z => z.Id == y.Key) as ICarModel)!, y.Value)
                    );
                }
                return _shopCars;
            }
        }

        public static Shop? Create(ShopBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }
            return new Shop()
            {
                Id = model.Id,
                Name = model.Name,
                Address = model.Address,
                MaxCountCars = model.MaxCountCars,
                OpeningDate = model.OpeningDate,
                Cars = model.ShopCars.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),
                Name = element.Element("Name")!.Value,
                Address = element.Element("Address")!.Value,
                MaxCountCars = Convert.ToInt32(element.Element("MaxCountCars")!.Value),
                OpeningDate = Convert.ToDateTime(element.Element("OpeningDate")!.Value),
                Cars = element.Element("ShopCars")!.Elements("ShopCar").ToDictionary(
                    x => Convert.ToInt32(x.Element("Key")?.Value),
                    x => Convert.ToInt32(x.Element("Value")?.Value)
                )
            };
        }


        public void Update(ShopBindingModel? model)
        {
            if (model == null)
            {
                return;
            }
            Name = model.Name;
            Address = model.Address;
            OpeningDate = model.OpeningDate;
            MaxCountCars = model.MaxCountCars;
            if (model.ShopCars.Count > 0)
            {
                Cars = model.ShopCars.ToDictionary(x => x.Key, x => x.Value.Item2);
                _shopCars = null;
            }
        }
        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            Name = Name,
            Address = Address,
            OpeningDate = OpeningDate,
            ShopCars = ShopCars,
            MaxCountCars = MaxCountCars
        };

        public XElement GetXElement => new(
            "Shop",
             new XAttribute("Id", Id),
             new XElement("Name", Name),
             new XElement("Address", Address),
             new XElement("MaxCountCars", MaxCountCars),
             new XElement("OpeningDate", OpeningDate.ToString()),
             new XElement("ShopCars", Cars.Select(x =>
             new XElement("ShopCar",
             new XElement("Key", x.Key),
             new XElement("Value", x.Value)))
            .ToArray()));
    }
}