using BarContracts.BindingModels;
using BarContracts.ViewModels;
using BarDataModels.Models;
using System.Collections.Generic;
using System.Xml.Linq;

namespace BarFileImplement.Models
{
    public class Cocktail : ICocktailModel
    {
        public int Id { get; private set; }
        public string CocktailName { 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)>? _cocktailComponents = null;
        public Dictionary<int, (IComponentModel, int)> CocktailComponents
        {
            get
            {
                if (_cocktailComponents == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _cocktailComponents = Components.ToDictionary(x => x.Key, y => ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!, y.Value));
                }
                return _cocktailComponents;
            }
        }
        public static Cocktail? Create(CocktailBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Cocktail()
            {
                Id = model.Id,
                CocktailName = model.CocktailName,
                Price = model.Price,
                Components = model.CocktailComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }
        public static Cocktail? Create(XElement element)
        {
            if (element == null)
            { return null; }
            return new Cocktail()
            {
                Id = Convert.ToInt32(element.Attribute("Id")?.Value),
                CocktailName = element.Element("CocktailName")!.Value,
                Price = Convert.ToDouble(element.Element("Price")!.Value, new System.Globalization.CultureInfo("en-US")),
                Components = element.Element("CocktailComponents")!.Elements("CocktailComponent").ToDictionary(x => Convert.ToInt32(x.Element("Key")?.Value), x => Convert.ToInt32(x.Element("Value")?.Value))
            };
        }
        public void Update(CocktailBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            CocktailName = model.CocktailName;
            Price = model.Price;
            Components = model.CocktailComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
            _cocktailComponents = null;
        }
        public CocktailViewModel GetViewModel => new()
        {
            Id = Id,
            CocktailName = CocktailName,
            Price = Price,
            CocktailComponents = CocktailComponents
        };
        public XElement GetXElement => new("Cocktail",
            new XAttribute("Id", Id),
            new XElement("CocktailName", CocktailName),
            new XElement("Price", Price),
            new XElement("CocktailComponents", Components.Select(x => new XElement("CocktailComponent", new XElement("Key", x.Key), new XElement("Value", x.Value))).ToArray()));
    }
}