Coursach/Course/DatabaseImplement/Models/Production.cs

using DataModels;
using DataModels.Models;
using Contracts.BindingModels;
using Contracts.ViewModels;
using Contracts.SearchModels;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace DatabaseImplement.Models
{
	public class Production : IProductionModel
	{
		public int Id { get; set; }
		[Required]
		public string Name { get; set; } = string.Empty;
		[Required]
		public double Cost { get; set; }
		[Required]
		public int UserId {  get; set; }
		private Dictionary<int, IDetailModel>? _detailProductions = null;
		[NotMapped]
		public Dictionary<int, IDetailModel>? DetailProductions
		{
			get
			{
				if (_detailProductions == null)
				{
					_detailProductions = Details.ToDictionary(recDP => recDP.DetailId, recDp => recDp.Detail as IDetailModel);
				}
				return _detailProductions;
			}
		}
		[ForeignKey("ProductionId")]
		public List<DetailProduction> Details { get; set; } = new();
		public virtual Implementer User { get; set; }
		
		public static Production Create(FactoryGoWorkDatabase context, ProductionBindingModel model)
		{
			return new Production()
			{
				Id = model.Id,
				Name = model.Name,
				Cost = model.Cost,
				UserId = model.UserId,
				Details = model.ProductionDetails.Select(x => new DetailProduction
				{
					Detail = context.Details.First(y => y.Id == x.Key),
				}).ToList(),
			};
		}
		public void Update(ProductionBindingModel model)
		{
			Name = model.Name;
			Cost = model.Cost;
		}
		public ProductionViewModel GetViewModel => new()
		{
			Id = Id,
			Name = Name,
			Cost = Cost,
			UserId = UserId,
			DetailProductions = DetailProductions
		};
		public void UpdateDetails(FactoryGoWorkDatabase context, ProductionBindingModel model)
		{
			var productionDetails = context.DetailProductions.Where(rec => rec.ProductionId == model.Id).ToList();
			if (productionDetails != null && productionDetails.Count > 0) 
			{
				context.DetailProductions.RemoveRange(productionDetails.Where(rec => !model.ProductionDetails.ContainsKey(rec.DetailId)));
				context.SaveChanges();
			}
			var production = context.Productions.First(x => x.Id == model.Id);
			foreach (var dp in model.ProductionDetails)
			{
				context.DetailProductions.Add(new DetailProduction
				{
					Production = production,
					Detail = context.Details.First(x => x.Id == dp.Key),
				});
				context.SaveChanges();
			}
			_detailProductions = null;
		}
	}
}