using ComputerHardwareStoreContracts.BindingModels;
using ComputerHardwareStoreContracts.ViewModels;
using ComputerHardwareStoreDataModels.Enums;
using ComputerHardwareStoreDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace ComputerHardwareStoreDatabaseImplement.Models
{
    public class Order : IOrderModel
    {
        public int Id { get; private set; }
        [Required]
        public double Sum { get; set; }
        [Required]
        public OrderStatus Status { get; set; } = OrderStatus.Неизвестен;
        [Required]
        public DateTime DateCreate { get; set; } = DateTime.Now;
        public DateTime? DateImplement { get; set; }

        private Dictionary<int, (IProductModel, int)>? _orderProducts = null;
        [NotMapped]
        public Dictionary<int, (IProductModel, int)> OrderProducts 
        {
            get
            {
                if (_orderProducts == null)
                {
                    _orderProducts = Products
                        .ToDictionary(
                            op => op.ProductId, 
                            op => (op.Product as IProductModel, op.Count));
                }
                return _orderProducts;
            }
        }
        [ForeignKey("OrderId")]
        public virtual List<OrderProduct> Products { get; set; } = new();
        public static Order? Create(ComputerHardwareStoreDBContext context, OrderBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Order()
            {
                Id = model.Id,
                Sum = model.Sum,
                Status = model.Status,
                DateCreate = model.DateCreate,
                DateImplement = model.DateImplement,
                Products = context.Products
                    .Where(p => model.OrderProducts.ContainsKey(p.Id))
                    .Select(p => new OrderProduct()
                    {
                        OrderId = model.Id,
                        ProductId = p.Id,
                        Product = p,
                        Count = model.OrderProducts[p.Id].Item2
                    })
                    .ToList()
            };
        }
        public void Update(OrderBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            Status = model.Status;
            DateImplement = model.DateImplement;
        }
        public OrderViewModel GetViewModel => new()
        {
            Id = Id,
            Sum = Sum,
            Status = Status,
            DateCreate = DateCreate,
            DateImplement = DateImplement,
        };
    }
}