using CanteenContracts.BindingModels;
using CanteenContracts.View;
using CanteenDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace CanteenDatabaseImplement.Models
{
    public class Product : IProductModel
    {
        public int Id { get; private set; }
        [Required]
        public string ProductName { get; private set; } = string.Empty;
        [Required]
        public double Cost { get; private set; }
        [Required]
        public int ManagerId { get; private set; }
        private Dictionary<int, ICookModel>? _productCooks = null;
        [NotMapped]
        public Dictionary<int, ICookModel> ProductCooks
        {
            get
            {
                if (_productCooks == null)
                {
                    _productCooks = Cooks.ToDictionary(record => record.CookId, record => record.Cook as ICookModel);
                }
                return _productCooks;
            }
        }
        [ForeignKey("ProductId")]
        public virtual List<ProductCook> Cooks { get; set; } = new();
        [ForeignKey("ProductId")]
        public virtual List<DishProduct> Dishes { get; set; } = new();
        public static Product? Create(CanteenDatabase context, ProductBindingModel model)
        {
            return new Product()
            {
                Id = model.Id,
                ProductName = model.ProductName,
                Cost = model.Cost,
                Cooks = model.ProductCooks.Select(x => new ProductCook
                {
                    Cook = context.Cooks.First(y => y.Id == x.Key)
                }).ToList()
            };
        }

        public void Update(ProductBindingModel model)
        {
            ProductName = model.ProductName;
            Cost = model.Cost;
        }

        public ProductViewModel GetViewModel => new()
        {
            Id = Id,
            ProductName = ProductName,
            Cost = Cost,
            ProductCooks = ProductCooks,
            ManagerId = ManagerId
        };

        public void UpdateCooks(CanteenDatabase context, ProductBindingModel model)
        {
            var productCooks = context.ProductCooks.Where(record => record.ProductId == model.Id).ToList();
            if (productCooks != null && productCooks.Count > 0)
            {
                context.ProductCooks.RemoveRange(productCooks.Where(record => !model.ProductCooks.ContainsKey(record.CookId)));
                context.SaveChanges();
            }

            var product = context.Products.First(x => x.Id == Id);
            foreach (var pc in model.ProductCooks)
            {
                context.ProductCooks.Add(new ProductCook
                {
                    Product = product,
                    Cook = context.Cooks.First(x => x.Id == pc.Key),
                });
                context.SaveChanges();
            }

            _productCooks = null;
        }
    }
}