using FlowerShopContracts.BindingModels;
using FlowerShopContracts.ViewModels;
using FlowerShopDataModels.Models;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

namespace FlowerShopDatabaseImplement.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 OpeningDate { get; set; }

        [ForeignKey("ShopId")]
        public List<ShopBouquet> Bouquets { get; set; } = new();

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

        [NotMapped]
        public Dictionary<int, (IBouquetModel, int)> ShopBouquets
        {
            get
            {
                if (_shopBouquets == null)
                {
                    _shopBouquets = Bouquets.ToDictionary(recPC => recPC.BouquetId, recPC => (recPC.Bouquet as IBouquetModel, recPC.Count));
                }

                return _shopBouquets;
            }
        }

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

        public static Shop Create(FlowerShopDatabase context, ShopBindingModel model)
        {
            return new Shop()
            {
                Id = model.Id,
                Name = model.Name,
                Address = model.Address,
                OpeningDate = model.OpeningDate,
                Bouquets = model.ShopBouquets.Select(x => new ShopBouquet
                {
                    Bouquet = context.Bouquets.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList(),
                MaxCountBouquets = model.MaxCountBouquets
            };
        }

        public void Update(ShopBindingModel model)
        {
            Name = model.Name;
            Address = model.Address;
            OpeningDate = model.OpeningDate;
            MaxCountBouquets = model.MaxCountBouquets;
        }

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

        public void UpdateBouquets(FlowerShopDatabase context, ShopBindingModel model)
        {
            var ShopBouquets = context.ShopBouquets.Where(rec => rec.ShopId == model.Id).ToList();
            
            if (ShopBouquets != null && this.ShopBouquets.Count > 0)
            {
                context.ShopBouquets.RemoveRange(ShopBouquets.Where((ShopBouquet rec) => !model.ShopBouquets.ContainsKey(rec.BouquetId)));
                context.SaveChanges();
                
                ShopBouquets = context.ShopBouquets.Where((ShopBouquet rec) => rec.ShopId == model.Id).ToList();
                
                foreach (var updateBouquet in ShopBouquets)
                {
                    updateBouquet.Count = model.ShopBouquets[updateBouquet.BouquetId].Item2;
                    model.ShopBouquets.Remove(updateBouquet.BouquetId);
                }

                context.SaveChanges();
            }
            var shop = context.Shops.First(x => x.Id == Id);

            foreach (var elem in model.ShopBouquets)
            {
                context.ShopBouquets.Add(new ShopBouquet
                {
                    Shop = shop,
                    Bouquet = context.Bouquets.First(x => x.Id == elem.Key),
                    Count = elem.Value.Item2
                });

                context.SaveChanges();
            }

            _shopBouquets = null;
        }
    }
}