everything/EveryThing/Models/Project/ProjectPartItem.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Threading.Tasks;
using EveryThing.Models.CodeTable;
using EveryThing.Models.Invoice;

namespace EveryThing.Models.Project
{
    public class ProjectPartItemStatusAttribute : Attribute
    {
        public int Order { get; set; }

        public ProjectPartItemStatusAttribute(int order)
        {
            Order = order;
        }
    }
    public enum ProjectPartItemStatus
    {
        [ProjectPartItemStatus(1)]
        [Display(Name = "Odprto")]
        Opened = 0,

        [ProjectPartItemStatus(2)]
        [Display(Name = "V izdelavi")]
        InProduction = 1,

        [ProjectPartItemStatus(3)]
        [Display(Name = "V koop.")]
        InCooperation = 10,

        [ProjectPartItemStatus(4)]
        [Display(Name = "Zaključeno")]
        Finished = 2,

        [ProjectPartItemStatus(5)]
        [Display(Name = "Odpremljeno")]
        Shipped = 3
    }

    public class ProjectPartItem
    {
        [Key]
        public int IdProjectPartItem { get; set; }

        [Required]
        [ForeignKey("ProjectPart")]
        public int IdProjectPartFk { get; set; }

        [ForeignKey("Item")]
        [Display(Name = "Artikel")]
        public int? IdItemFk { get; set; }
        
        [Required]
        [Display(Name = "Število kosov")]
        public float NumberOfItems { get; set; }

        [Display(Name = "Število kompletov")]
        public float NumberOfSets { get; set; }

        [ForeignKey("Material")]
        [Display(Name = "Material")]
        public int? IdMaterialFk { get; set; }

        [Display(Name = "Dimenzije surovca")]
        public string MaterialDimensions { get; set; }

        [Required]
        [ForeignKey("MaterialSupplier")]
        [Display(Name = "Dobavitelj materiala")]
        public int? IdMaterialSupplierFk { get; set; }

        [Display(Name = "Cena - Material")]
        public float MaterialPrice { get; set; }

        [Display(Name = "Cena - Delo")]
        public float WorkPrice { get; set; }

        [Display(Name = "Prodajna cena")]
        public float SellingPrice { get; set; } = 0;

        [Display(Name = "Število kosov - Zaključeno")]
        public float NumberOfItemsFinished { get; set; }

        [NotMapped]
        [Display(Name = "Vrednost - Delo")]
        public double WorkValue
        {
            get => Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems) * Convert.ToDouble(WorkPrice);
            set => WorkPrice = Convert.ToSingle(Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems == 0
                ? 0
                : value / (Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems))));
        }

        [NotMapped]
        [Display(Name = "Vrednost - Delo")]
        public double MaterialValue
        {
            get => Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems) * Convert.ToDouble(MaterialPrice);
            set => MaterialPrice = Convert.ToSingle(Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems == 0
                ? 0
                : value / (Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems))));
        }

        [NotMapped]
        [Display(Name = "Vrednost - cena")]
        public double CostPrice=> Convert.ToDouble(WorkPrice) + Convert.ToDouble(MaterialPrice);

        [NotMapped]
        [Display(Name = "Vrednost - strošek")]
        public double CostValue => Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems) * Convert.ToDouble(CostPrice);

        [NotMapped]
        [Display(Name = "Prodajna vrednost")]
        public double SellingValue
        {
            get => Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems) * Convert.ToDouble(SellingPrice);
            set => SellingPrice = Convert.ToSingle(Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems == 0
                ? 0
                : value / (Convert.ToDouble(NumberOfSets) * Convert.ToDouble(NumberOfItems))));
        }

        [NotMapped]
        [Display(Name = "RVC")]
        public double DifferenceInPrice
        {
            get => SellingPrice - (MaterialPrice + WorkPrice);
            set => SellingPrice = Convert.ToSingle(value + (MaterialPrice + WorkPrice));
        }

        [NotMapped]
        [Display(Name = "RVC")]
        public double DifferenceInPriceValue => SellingValue - (MaterialValue + WorkValue);

        [NotMapped]
        [Display(Name = "RVC")]
        public double DifferenceInPricePercentage =>
            (Convert.ToDouble(MaterialValue) + Convert.ToDouble(WorkValue)) == 0 
                ? 100 
                : ((SellingValue / (MaterialValue + WorkValue) - 1) * 100);

        [Required]
        [Display(Name = "Status")]
        public ProjectPartItemStatus Status { get; set; } = ProjectPartItemStatus.Opened;

        [Display(Name = "Datum zaključka")]
        [DisplayFormat(DataFormatString = "{0:dd.MM.yyyy}", ApplyFormatInEditMode = true)]
        public DateTime? FinishedDate { get; set; }

        [Display(Name = "Datum odpreme")]
        [DisplayFormat(DataFormatString = "{0:dd.MM.yyyy}", ApplyFormatInEditMode = true)]
        public DateTime? ShippingDate { get; set; }

        [Display(Name = "Dobavni rok")]
        [DisplayFormat(DataFormatString = "{0:dd.MM.yyyy}", ApplyFormatInEditMode = true)]
        public DateTime? DeliveryDate { get; set; }

        [Display(Name = "Spremenjeno")]
        public DateTime DateModified { get; set; } = DateTime.Now;


        [Required]
        public int ProjectPartItemNumber { get; set; } = 0;

        [NotMapped]
        public string ProjectPartNumberFormatted => (ProjectPart != null ? ProjectPart.ProjectPartNumberFormatted : "") + $"-{ProjectPartItemNumber:D4}";

        // ForeignKey
        public ProjectPart ProjectPart { get; set; }
        public CodeTablePartner MaterialSupplier { get; set; }
        public CodeTableItem Item { get; set; }
        public CodeTableItem Material { get; set; }

        //Invoice item
        [InverseProperty("ProjectPartItem")]
        public virtual ICollection<InvoiceItem> InvoiceItem { get; set; }
    }
}