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

namespace PrecastConcretePlantDatabaseImplement.Models
{
    public class Shop : IShopModel
    {
        public int Id { get; set; }
        [Required]
        public string Name { get; set; } = string.Empty;
        [Required]
        public string Address { get; set; } = string.Empty;
        [Required]
        public DateTime DateOpening { get; set; }
        [Required]
        public int ReinforcedMaxCount { get; set; }

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

        [NotMapped]
        public Dictionary<int, (IReinforcedModel, int)> ShopReinforcedies
        {
            get
            {
                if (_shopReinforcedies == null)
                {
                    _shopReinforcedies = Reinforcedies.ToDictionary(recST => recST.ReinforcedId, recST => (recST.Reinforced as IReinforcedModel, recST.Count));
                }
                return _shopReinforcedies;
            }
        }
        [ForeignKey("ShopId")]
        public virtual List<ShopReinforced> Reinforcedies { get; set; } = new();
        public static Shop Create(PrecastConcretePlantDataBase context, ShopBindingModel model)
        {
            return new Shop()
            {
                Id = model.Id,
                Name = model.Name,
                Address = model.Address,
                DateOpening = model.DateOpening,
                ReinforcedMaxCount = model.ReinforcedMaxCount,
                Reinforcedies = model.ShopReinforcedies.Select(x => new ShopReinforced
                {
                    Reinforced = context.Reinforcedies.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }

        public void Update(ShopBindingModel model)
        {
            Name = model.Name;
            Address = model.Address;
            DateOpening = model.DateOpening;
            ReinforcedMaxCount = model.ReinforcedMaxCount;
        }

        public ShopViewModel GetViewModel => new()
        {
            Id = Id,
            Name = Name,
            Address = Address,
            DateOpening = DateOpening,
            ReinforcedMaxCount = ReinforcedMaxCount,
            ShopReinforcedies = ShopReinforcedies
        };

        public void UpdateReinforcedies(PrecastConcretePlantDataBase context, ShopBindingModel model)
        {
            var shopReinforcedies = context.ShopReinforcedies.Where(rec => rec.ShopId == model.Id).ToList();
            if (shopReinforcedies != null && shopReinforcedies.Count > 0)
            {  
                context.ShopReinforcedies.RemoveRange(shopReinforcedies.Where(rec => !model.ShopReinforcedies.ContainsKey(rec.ReinforcedId)));
                context.SaveChanges();

                foreach (var updateReinforced in shopReinforcedies)
                {
                    updateReinforced.Count = model.ShopReinforcedies[updateReinforced.ReinforcedId].Item2;
                    model.ShopReinforcedies.Remove(updateReinforced.ReinforcedId);
                }
                context.SaveChanges();
            }
            var shop = context.Shops.First(x => x.Id == Id);
            foreach (var st in model.ShopReinforcedies)
            {
                context.ShopReinforcedies.Add(new ShopReinforced
                {
                    Shop = shop,
                    Reinforced = context.Reinforcedies.First(x => x.Id == st.Key),
                    Count = st.Value.Item2
                });
                context.SaveChanges();
            }
            _shopReinforcedies = null;
        }
    }
}