using FurnitureAssemblyContracts.BindingModels;
using FurnitureAssemblyContracts.ViewModels;
using FurnitureAssemblyDataModels.Models;
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 Users : IUsersModel
    {
        public int Id { get; private set; }

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

        public double Price { get; private set; }

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

        private Dictionary<int, (IKommentModel, int)>? _usersKomments = null;

        public Dictionary<int, (IKommentModel, int)> UsersKomments
        {
            get
            {
                if (_usersKomments == null)
                {
                    var source = DataFileSingleton.GetInstance();

                    _usersKomments = Komments.ToDictionary(x => x.Key,
                        y => ((source.Komments.FirstOrDefault(z => z.Id == y.Key) as IKommentModel)!, y.Value));
                }

                return _usersKomments;
            }
        }

        public static Users? Create(UsersBindingModel model)
        {
            if (model == null)
            {
                return null;
            }

            return new Users()
            {
                Id = model.Id,
                UsersName = model.UsersName,
                Price = model.Price,
                Komments = model.UsersKomments.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }

        public static Users? Create(XElement element)
        {
            if (element == null)
            {
                return null;
            }

            return new Users()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                UsersName = element.Element("UsersName")!.Value,
                Price = Convert.ToDouble(element.Element("Price")!.Value),
                Komments = element.Element("FurnitureWorkPieces")!.Elements("FurnitureWorkPieces").ToDictionary(
                    x => Convert.ToInt32(x.Element("Key")?.Value),
                    y => Convert.ToInt32(y.Element("Value")?.Value))
            };
        }

        public void Update(UsersBindingModel model)
        {
            if (model == null)
            {
                return;
            }

            UsersName = model.UsersName;
            Price = model.Price;
            Komments = model.UsersKomments.ToDictionary(x => x.Key, x => x.Value.Item2);
            _usersKomments = null;
        }

        public UsersViewModel GetViewModel => new()
        {
            Id = Id,
            UsersName = UsersName,
            Price = Price,
            UsersKomments = UsersKomments
        };

        public XElement GetXElement => new("User",
            new XAttribute("Id", Id),
            new XElement("UsersName", UsersName),
            new XElement("Price", Price.ToString()),
            new XElement("UsersKomments", Komments.Select(
                x => new XElement("UsersKomments",
                    new XElement("Key", x.Key),
                    new XElement("Value", x.Value))
                ).ToArray()));
    }
}