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

namespace FlowerShopFileImplement.Models
{
    public class Shop : IShopModel
    {
        public int Id { get; private set; }

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

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

        public int MaxCountBouquets { get; private set; }

        public DateTime OpeningDate { get; private set; }

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

        private Dictionary<int, (IBouquetModel, int)>? _shopBouquets = null;

        public Dictionary<int, (IBouquetModel, int)> ShopBouquets
        {
            get
            {
                if (_shopBouquets == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _shopBouquets = Bouquets.ToDictionary(
                        x => x.Key,
                        y => ((source.Bouquets.FirstOrDefault(z => z.Id == y.Key) as IBouquetModel)!, y.Value)
                    );
                }
                return _shopBouquets;
            }
        }

        public static Shop? Create(ShopBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }

            return new Shop()
            {
                Id = model.Id,
                Name = model.Name,
                Address = model.Address,
                MaxCountBouquets = model.MaxCountBouquets,
                OpeningDate = model.OpeningDate,
                Bouquets = model.ShopBouquets.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }

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

            return new Shop()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                Name = element.Element("Name")!.Value,
                Address = element.Element("Address")!.Value,
                MaxCountBouquets = Convert.ToInt32(element.Element("MaxCountBouquets")!.Value),
                OpeningDate = Convert.ToDateTime(element.Element("OpeningDate")!.Value),
                Bouquets = element.Element("ShopBouquets")!.Elements("ShopBouquet").ToDictionary(
                    x => Convert.ToInt32(x.Element("Key")?.Value),
                    x => Convert.ToInt32(x.Element("Value")?.Value)
                )
            };
        }

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

            Name = model.Name;
            Address = model.Address;
            OpeningDate = model.OpeningDate;
            MaxCountBouquets = model.MaxCountBouquets;

            if (model.ShopBouquets.Count > 0)
            {
                Bouquets = model.ShopBouquets.ToDictionary(x => x.Key, x => x.Value.Item2);
                _shopBouquets = null;
            }
        }

        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            Name = Name,
            Address = Address,
            OpeningDate = OpeningDate,
            ShopBouquets = ShopBouquets,
            MaxCountBouquets = MaxCountBouquets
        };

        public XElement GetXElement => new(
            "Shop",
             new XAttribute("Id", Id),
             new XElement("Name", Name),
             new XElement("Address", Address),
             new XElement("MaxCountBouquets", MaxCountBouquets),
             new XElement("OpeningDate", OpeningDate.ToString()),
             new XElement("ShopBouquets", Bouquets.Select(x =>
             new XElement("ShopBouquet",
             new XElement("Key", x.Key),
             new XElement("Value", x.Value)))
            .ToArray())
        );
    }
}