using AircraftPlantContracts.BindingModels;
using AircraftPlantContracts.ViewModels;
using AircraftPlantDataModels.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace AircraftPlantFileImplement.Models
{
    /// <summary>
    /// Сущность "Изделие"
    /// </summary>
    public class Plane : IPlaneModel
    {
        /// <summary>
        /// Идентификатор
        /// </summary>
        public int Id { get; private set; }

        /// <summary>
        /// Название изделия
        /// </summary>
        public string PlaneName { get; private set; } = string.Empty;

        /// <summary>
        /// Стоимость изделия
        /// </summary>
        public double Price { get; private set; }

        /// <summary>
        /// Коллекция компонентов изделия в виде
        /// «идентификатор компонента – количество компонентов»
        /// </summary>
        public Dictionary<int, int> Components { get; private set; } = new();

        /// <summary>
        /// Коллекция компонентов изделия
        /// </summary>
        private Dictionary<int, (IComponentModel, int)>? _planeComponents = null;
        public Dictionary<int, (IComponentModel, int)> PlaneComponents
        {
            get
            {
                if (_planeComponents == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _planeComponents = Components.ToDictionary(x => x.Key, y => ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!, y.Value));
                }
                return _planeComponents;
            }
        }

        /// <summary>
        /// Создание модели изделия
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public static Plane? Create(PlaneBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }

            return new Plane()
            {
                Id = model.Id,
                PlaneName = model.PlaneName,
                Price = model.Price,
                Components = model.PlaneComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }

        /// <summary>
        /// Создание модели изделия из данных файла
        /// </summary>
        /// <param name="element"></param>
        /// <returns></returns>
        public static Plane? Create(XElement element)
        {
            if (element == null)
            {
                return null;
            }

            return new Plane()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                PlaneName = element.Element("PlaneName")!.Value,
                Price = Convert.ToDouble(element.Element("Price")!.Value),
                Components = element.Element("PlaneComponents")!.Elements("PlaneComponent")
                    .ToDictionary(x => Convert.ToInt32(x.Element("Key")?.Value), x => Convert.ToInt32(x.Element("Value")?.Value))
            };
        }

        /// <summary>
        /// Изменение модели изделия
        /// </summary>
        /// <param name="model"></param>
        public void Update(PlaneBindingModel? model)
        {
            if (model == null)
            {
                return;
            }

            PlaneName = model.PlaneName;
            Price = model.Price;
            Components = model.PlaneComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
            _planeComponents = null;
        }

        /// <summary>
        /// Получение модели изделия
        /// </summary>
        public PlaneViewModel GetViewModel => new()
        {
            Id = Id,
            PlaneName = PlaneName,
            Price = Price,
            PlaneComponents = PlaneComponents
        };

        /// <summary>
        /// Запись данных о модели изделия в файл
        /// </summary>
        public XElement GetXElement => new("Plane",
            new XAttribute("Id", Id),
            new XElement("PlaneName", PlaneName),
            new XElement("Price", Price.ToString()),
            new XElement("PlaneComponents", Components.Select(x =>
                new XElement("PlaneComponent",
                new XElement("Key", x.Key),
                new XElement("Value", x.Value)))
            .ToArray()));
    }
}