using FlowerShopContracts.BindingModels;
using FlowerShopContracts.ViewModels;
using FlowerShopDataModels.Models;
using System.Xml.Linq;

namespace FlowerShopFileImplement.Models
{
    public class Flower : IFlowerModel
    {
        public int Id { get; private set; }
        public string FlowerName { get; private set; } = string.Empty;
        public double Price { get; private set; }
        public Dictionary<int, int> Components { get; private set; } = new();
        private Dictionary<int, (IComponentModel, int)>? _flowerComponents = null;
        public Dictionary<int, (IComponentModel, int)> FlowerComponents
        {
            get
            {
                if (_flowerComponents == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _flowerComponents = Components.ToDictionary(x => x.Key, 
                        y => ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!,  y.Value));
                }
                return _flowerComponents;
            }
        }
        public static Flower? Create(FlowerBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Flower()
            {
                Id = model.Id,
                FlowerName = model.FlowerName,
                Price = model.Price,
                Components = model.FlowerComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }
        public static Flower? Create(XElement element)
        {
            if (element == null)
            {
                return null;
            }
            return new Flower()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                FlowerName = element.Element("FlowerName")!.Value,
                Price = Convert.ToDouble(element.Element("Price")!.Value),
                Components = element.Element("FlowerComponents")!.Elements("FlowerComponent")
                    .ToDictionary(x =>
                    Convert.ToInt32(x.Element("Key")?.Value), x =>
                    Convert.ToInt32(x.Element("Value")?.Value))
            };
        }
        public void Update(FlowerBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            FlowerName = model.FlowerName;
            Price = model.Price;
            Components = model.FlowerComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
            _flowerComponents = null;
        }
        public FlowerViewModel GetViewModel => new()
        {
            Id = Id,
            FlowerName = FlowerName,
            Price = Price,
            FlowerComponents = FlowerComponents
        };
        public XElement GetXElement => new("Flower",
        new XAttribute("Id", Id),
        new XElement("FlowerName", FlowerName),
        new XElement("Price", Price.ToString()),
        new XElement("FlowerComponents", Components.Select(x =>
            new XElement("FlowerComponent",

            new XElement("Key", x.Key),

            new XElement("Value", x.Value)))

            .ToArray()));
    }

}