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

namespace FlowerShopDatabaseImplement.Models
{
    public class Bouquet : IBouquetModel
    {
        public int Id { get; private set; }

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

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

        private Dictionary<int, (IComponentModel, int)>? _bouquetComponents = null;

        [NotMapped]
        public Dictionary<int, (IComponentModel, int)> BouquetComponents
        {
            get
            {
                if (_bouquetComponents == null)
                {
                    _bouquetComponents = Components.ToDictionary(record => record.ComponentId, record => (record.Component as IComponentModel, record.Count));
                }
                return _bouquetComponents;
            }
        }

        [ForeignKey("BouquetId")]
        public virtual List<BouquetComponent> Components { get; set; } = new();

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

        public static Bouquet? Create(FlowerShopDatabase context, BouquetBindingModel model)
        {
            return new Bouquet()
            {
                Id = model.Id,
                BouquetName = model.BouquetName,
                Price = model.Price,
                Components = model.BouquetComponents.Select(x => new BouquetComponent
                {
                    Component = context.Components.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }

        public void Update(BouquetBindingModel model)
        {
            BouquetName = model.BouquetName;
            Price = model.Price;
        }

        public BouquetViewModel GetViewModel => new()
        {
            Id = Id,
            BouquetName = BouquetName,
            Price = Price,
            BouquetComponents = BouquetComponents
        };

        public void UpdateComponents(FlowerShopDatabase context, BouquetBindingModel model)
        {
            var bouquetComponents = context.BouquetComponents.Where(record => record.BouquetId == model.Id).ToList();
            if (bouquetComponents != null && bouquetComponents.Count > 0)
            {
                context.BouquetComponents.RemoveRange(bouquetComponents.Where(record => !model.BouquetComponents.ContainsKey(record.ComponentId)));
                context.SaveChanges();

                foreach (var updateComponent in bouquetComponents)
                {
                    updateComponent.Count = model.BouquetComponents[updateComponent.ComponentId].Item2;
                    model.BouquetComponents.Remove(updateComponent.ComponentId);
                }
                context.SaveChanges();
            }

            var bouquet = context.Bouquets.First(x => x.Id == Id);
            foreach (var pc in model.BouquetComponents)
            {
                context.BouquetComponents.Add(new BouquetComponent
                {
                    Bouquet = bouquet,
                    Component = context.Components.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }

            _bouquetComponents = null;
        }
    }
}