using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConfectioneryDatabaseImplement.Models
{
    public class Sweets : ISweetsModel
    {
        public int Id { get; set; }

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

        [Required]
        public double Price { get; set; }

        private Dictionary<int, (IIngredientModel, int)>? _sweetsIngredients = null;

        [NotMapped]
        public Dictionary<int, (IIngredientModel, int)> SweetsIngredients
        {
            get
            {
                if (_sweetsIngredients == null)
                {
                    _sweetsIngredients = Ingredients
                            .ToDictionary(recPC => recPC.IngredientId, recPC => (recPC.Ingredient as IIngredientModel, recPC.Count));
                }
                return _sweetsIngredients;
            }
        }

        [ForeignKey("SweetsId")]
        public virtual List<SweetsIngredient> Ingredients { get; set; } = new();
        [ForeignKey("SweetsId")]
        public virtual List<Order> Orders { get; set; } = new();

        public static Sweets Create(ConfectioneryDatabase context, SweetsBindingModel model)
        {
            return new Sweets()
            {
                Id = model.Id,
                SweetsName = model.SweetsName,
                Price = model.Price,
                Ingredients = model.SweetsIngredients.Select(x => new SweetsIngredient
                {
                    Ingredient = context.Ingredients.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }

        public void Update(SweetsBindingModel model)
        {
            SweetsName = model.SweetsName;
            Price = model.Price;
        }

        public SweetsViewModel GetViewModel => new()
        {
            Id = Id,
            SweetsName = SweetsName,
            Price = Price,
            SweetsIngredients = SweetsIngredients
        };

        public void UpdateIngredients(ConfectioneryDatabase context, SweetsBindingModel model)
        {
            var sweetsIngredients = context.SweetsIngredients.Where(rec => rec.SweetsId == model.Id).ToList();
            if (sweetsIngredients != null && sweetsIngredients.Count > 0)
            {   
                context.SweetsIngredients.RemoveRange(sweetsIngredients.Where(rec => !model.SweetsIngredients.ContainsKey(rec.IngredientId)));
                context.SaveChanges();
                foreach (var updateIngredient in sweetsIngredients)
                {
                    updateIngredient.Count = model.SweetsIngredients[updateIngredient.IngredientId].Item2;
                    model.SweetsIngredients.Remove(updateIngredient.IngredientId);
                }
                context.SaveChanges();
            }
            var sweets = context.ListSweets.First(x => x.Id == Id);
            foreach (var si in model.SweetsIngredients)
            {
                context.SweetsIngredients.Add(new SweetsIngredient
                {
                    Sweets = sweets,
                    Ingredient = context.Ingredients.First(x => x.Id == si.Key),
                    Count = si.Value.Item2
                });
                context.SaveChanges();
            }
            _sweetsIngredients = null;
        }
    }
}