using AbstractLawFirmContracts.BindingModels;
using AbstractLawFirmContracts.ViewModels;
using AbstractLawFirmDataModels.Models;
using AbstractLawFirmFileImpliment;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace AbstractLawFirmFileImplement.Models
{
    public class Document : IDocumentModel
    {
        public int Id { get; private set; }
        public string DocumentName { 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)>? _productComponents =
       null;
        public Dictionary<int, (IComponentModel, int)> ProductComponents
        {
            get
            {
                if (_productComponents == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _productComponents = Components.ToDictionary(x => x.Key, y =>
                    ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!,
                    y.Value));
                }
                return _productComponents;
            }
        }
        public static Document? Create(DocumentBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Document()
            {
                Id = model.Id,
                DocumentName = model.DocumentName,
                Price = model.Price,
                Components = model.DocumentComponents.ToDictionary(x => x.Key, x
               => x.Value.Item2)
            };
        }
        public static Document? Create(XElement element)
        {
            if (element == null)
            {
                return null;
            }
            return new Document()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                DocumentName = element.Element("ProductName")!.Value,
                Price = Convert.ToDouble(element.Element("Price")!.Value),
                Components =
           element.Element("ProductComponents")!.Elements("ProductComponent")
            .ToDictionary(x =>
           Convert.ToInt32(x.Element("Key")?.Value), x =>
           Convert.ToInt32(x.Element("Value")?.Value))
            };
        }
        public void Update(DocumentBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            DocumentName = model.DocumentName;
            Price = model.Price;
            Components = model.DocumentComponents.ToDictionary(x => x.Key, x =>
           x.Value.Item2);
            _productComponents = null;
        }
        public DocumentViewModel GetViewModel => new()
        {
            Id = Id,
            DocumentName = DocumentName,
            Price = Price,
            DocumentComponents = ProductComponents
        };
        public XElement GetXElement => new("Product",
        new XAttribute("Id", Id),
        new XElement("ProductName", DocumentName),
        new XElement("Price", Price.ToString()),
        new XElement("ProductComponents", Components.Select(x =>
       new XElement("ProductComponent",

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

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

       .ToArray()));

        public Dictionary<int, (IComponentModel, int)> DocumentComponents => throw new NotImplementedException();
    }
}