using BarContracts.BindingModels;
using BarContracts.ViewModels;
using BarDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Runtime.Serialization;

namespace BarDatabaseImplement.Models
{
	[DataContract]
	public class Cocktail : ICocktailModel
    {
		[DataMember]
		public int Id { get; set; }

		[DataMember]
		[Required]
        public string CocktailName { get; set; } = string.Empty;

		[DataMember]
		[Required]
        public double Price { get; set; }
        private Dictionary<int, (IComponentModel, int)>? _cocktailComponents = null;

		[DataMember]
		[NotMapped]
        public Dictionary<int, (IComponentModel, int)> CocktailComponents
        {
            get
            {
                if (_cocktailComponents == null)
                {
                    _cocktailComponents = Components.ToDictionary(recDC => recDC.ComponentId, recDC => (recDC.Component as IComponentModel, recDC.Count));
                }
                return _cocktailComponents;
            }
        }
        [ForeignKey("CocktailId")]
        public virtual List<CocktailComponent> Components { get; set; } = new();
        [ForeignKey("CocktailId")]
        public virtual List<Order> Orders { get; set; } = new();
        public static Cocktail Create(BarDatabase context, CocktailBindingModel model)
        {
            return new Cocktail()
            {
                Id = model.Id,
                CocktailName = model.CocktailName,
                Price = model.Price,
                Components = model.CocktailComponents.Select(x => new CocktailComponent
                {
                    Component = context.Components.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }
        public void Update(CocktailBindingModel model)
        {
            CocktailName = model.CocktailName;
            Price = model.Price;
        }
        public CocktailViewModel GetViewModel => new()
        {
            Id = Id,
            CocktailName = CocktailName,
            Price = Price,
            CocktailComponents = CocktailComponents
        };
        public void UpdateComponents(BarDatabase context, CocktailBindingModel model)
        {
            var cocktailComponents = context.CocktailComponents.Where(rec => rec.CocktailId == model.Id).ToList();
            if (cocktailComponents != null && cocktailComponents.Count > 0)
            {
                context.CocktailComponents.RemoveRange(cocktailComponents.Where(rec => !model.CocktailComponents.ContainsKey(rec.ComponentId)));
                context.SaveChanges();
                foreach (var updateComponent in cocktailComponents)
                {
                    updateComponent.Count = model.CocktailComponents[updateComponent.ComponentId].Item2;
                    model.CocktailComponents.Remove(updateComponent.ComponentId);
                }
                context.SaveChanges();
            }
            var cocktail = context.Cocktails.First(x => x.Id == Id);
            foreach (var pc in model.CocktailComponents)
            {
                context.CocktailComponents.Add(new CocktailComponent
                {
                    Cocktail = cocktail,
                    Component = context.Components.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _cocktailComponents = null;
        }

    }
}