using PrecastConcretePlantContracts.BindingModels;
using PrecastConcretePlantContracts.ViewModels;
using PrecastConcretePlantDataModels.Models;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

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

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

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

        [Required]
        public DateTime DateOpening { get; set; }

        [Required]
        public int ReinforcedsMax { get; set; }

        private Dictionary<int, (IReinforcedModel, int)>? _shopReinforceds = null;

        [NotMapped]
        public Dictionary<int, (IReinforcedModel, int)> ShopReinforceds
        {
            get
            {
                if (_shopReinforceds == null)
                {
                    _shopReinforceds = Reinforceds
                            .ToDictionary(x => x.ReinforcedId, x => (x.Reinforced as IReinforcedModel, x.Count));
                }
                return _shopReinforceds;
            }
        }
        //3ий вопрос
        [ForeignKey("ShopId")]//список записей класса-связи
        public virtual List<ShopReinforced> Reinforceds { get; set; } = new();

        public static Shop Create(PrecastConcretePlantDataBase context, ShopBindingModel model)
        {
            return new Shop()
            {
                Id = model.Id,
                ShopName = model.ShopName,
                Address = model.Address,
                DateOpening = model.DateOpening,
                ReinforcedsMax = model.ReinforcedsMax,
                Reinforceds = model.ShopReinforceds.Select(x => new ShopReinforced
                {
                    Reinforced = context.Reinforceds.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }

        public void Update(ShopBindingModel model)
        {
            ShopName = model.ShopName;
            Address = model.Address;
            DateOpening = model.DateOpening;
            ReinforcedsMax = model.ReinforcedsMax;
        }

        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            ShopName = ShopName,
            Address = Address,
            DateOpening = DateOpening,
            ReinforcedsMax = ReinforcedsMax,
            ShopReinforceds = ShopReinforceds
        };

        public void UpdateReinforceds(PrecastConcretePlantDataBase context, ShopBindingModel model)
        {
            var shopReinforceds = context.ShopReinforceds.Where(rec => rec.ShopId == model.Id).ToList();
            if (shopReinforceds != null && shopReinforceds.Count > 0)
            {
                context.ShopReinforceds.RemoveRange(shopReinforceds.Where(rec => !model.ShopReinforceds.ContainsKey(rec.ReinforcedId)));
                context.SaveChanges();
                foreach (var updateReinforced in shopReinforceds)
                {
                    if (model.ShopReinforceds.ContainsKey(updateReinforced.ReinforcedId))
                    {
                        updateReinforced.Count = model.ShopReinforceds[updateReinforced.ReinforcedId].Item2;
                        model.ShopReinforceds.Remove(updateReinforced.ReinforcedId);
                    }
                }
                context.SaveChanges();
            }
            var shop = context.Shops.First(x => x.Id == Id);
            foreach (var ic in model.ShopReinforceds)
            {
                context.ShopReinforceds.Add(new ShopReinforced
                {
                    Shop = shop,
                    Reinforced = context.Reinforceds.First(x => x.Id == ic.Key),
                    Count = ic.Value.Item2
                });
                context.SaveChanges();
            }
            _shopReinforceds = null;
        }
    }
}