PIAPS_CW/DatabaseImplement/Models/Product.cs

using Contracts.BindingModels;
using Contracts.ViewModels;
using DataModels.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;
using static System.Runtime.InteropServices.JavaScript.JSType;

namespace DatabaseImplement.Models
{
	public class Product : IProduct
	{
		[Required]
		public Guid Id { get; set; }
		public Guid? SaleId { get; set; }
		[Required]
		public string Name { get; set; } = string.Empty;
		[Required]
		public double Price { get; set; }
		[Required]
		public double Rate { get; set; }
		[Required]
		public bool IsBeingSold { get; set; }
        public string? Category { get; set; }
		public string? Description { get; set; }
        public virtual Sale? Sale { get; set; }
        [Required]
		public int Amount { get; set; }
        [ForeignKey("ProductId")]
        public virtual List<SellProducts> SellProducts { get; set; } = new();
        public ProductBindingModel GetBindingModel() => new()
		{
			Id = Id,
			Name = Name,
			Price = Price,
			Rate = Rate,
			IsBeingSold = IsBeingSold,
			Amount = Amount,
			Category = Category,
			Description = Description,
			SaleId = SaleId
        };

		public static Product ToProductFromView(ProductViewModel model, Product product) => new()
		{
			Id = model.Id,
			Name = model.Name,
			Price = model.Price,
			Rate = model.Rate,
			IsBeingSold = model.IsBeingSold,
			Amount = model.Amount,
			Category = model.Category,
            SaleId = model.SaleId
        };

		public static Product ToProductFromBinding(ProductBindingModel model, Product product) => new()
		{
			Id = model.Id,
			Name = model.Name,
			Price = model.Price,
			Rate = model.Rate,
			IsBeingSold = model.IsBeingSold,
			Amount = model.Amount,
			Description = model.Description,
			Category = model.Category,
            SaleId = model.SaleId
        };

        public static Product Create(Database context, ProductBindingModel model)
		{
			return new Product()
			{
				Id = model.Id,
				Name = model.Name,
				Price = model.Price,
				Rate = model.Rate,
				IsBeingSold = model.IsBeingSold,
				Amount = model.Amount,
				Description = model.Description,
				Category = model.Category,
				SaleId = model.SaleId
			};
		}


        public void Update(ProductBindingModel model)
		{
			if (model is null)
			{
				throw new ArgumentNullException("Update product: binding model is null");
			}

			Name = model.Name;
			Price = model.Price;
			Rate = model.Rate;
			IsBeingSold = model.IsBeingSold;
			Amount = model.Amount;
			Description = model.Description;
			Category = model.Category;
			SaleId = model.SaleId;
        }
        public ProductViewModel GetViewModel
        {
            get
            {
				double saleValue = 0;
				if (Sale is not null)
                    saleValue = Sale.Value;
				return new()
				{
					Id = Id,
					Name = Name,
					Price = Price,
					IsBeingSold = IsBeingSold,
					Rate = Rate,
					Amount = Amount,
					Description = Description,
					Category = Category,
					SaleId = SaleId,
					ActualPrice = Price / 100 * (100 - saleValue)
				};
            }
        }
    }
}