food-market/src/food-market.infrastructure/Persistence/Configurations/PurchasesConfigurations.cs

using foodmarket.Domain.Purchases;
using Microsoft.EntityFrameworkCore;

namespace foodmarket.Infrastructure.Persistence.Configurations;

public static class PurchasesConfigurations
{
    public static void ConfigurePurchases(this ModelBuilder b)
    {
        b.Entity<Supply>(e =>
        {
            e.ToTable("supplies");
            // Optimistic concurrency через Postgres xmin (Npgsql-native):
            // UseXminAsConcurrencyToken создаёт shadow-property "xmin" — EF
            // её читает в SELECT и сверяет в WHERE при UPDATE. Доступ из C#
            // через EF.Property<uint>(supply, "xmin") (см. GetInternal).
            // Свою .NET-property Xmin игнорируем — она существует только для
            // транспорта в DTO (контроллер заполняет вручную).
            e.UseXminAsConcurrencyToken();
            e.Ignore(x => x.Xmin);
            e.Property(x => x.Number).HasMaxLength(50).IsRequired();
            e.Property(x => x.Notes).HasMaxLength(1000);
            e.Property(x => x.Total).HasPrecision(18, 4);

            e.HasOne(x => x.Supplier).WithMany().HasForeignKey(x => x.SupplierId).OnDelete(DeleteBehavior.Restrict);
            e.HasOne(x => x.Store).WithMany().HasForeignKey(x => x.StoreId).OnDelete(DeleteBehavior.Restrict);
            e.HasOne(x => x.Currency).WithMany().HasForeignKey(x => x.CurrencyId).OnDelete(DeleteBehavior.Restrict);

            e.HasMany(x => x.Lines).WithOne(l => l.Supply).HasForeignKey(l => l.SupplyId).OnDelete(DeleteBehavior.Cascade);

            e.HasIndex(x => new { x.OrganizationId, x.Number }).IsUnique();
            e.HasIndex(x => new { x.OrganizationId, x.Date });
            e.HasIndex(x => new { x.OrganizationId, x.Status });
            e.HasIndex(x => new { x.OrganizationId, x.SupplierId });
        });

        b.Entity<SupplyLine>(e =>
        {
            e.ToTable("supply_lines");
            e.Property(x => x.Quantity).HasPrecision(18, 4);
            e.Property(x => x.UnitPrice).HasPrecision(18, 4);
            e.Property(x => x.LineTotal).HasPrecision(18, 4);

            e.HasOne(x => x.Product).WithMany().HasForeignKey(x => x.ProductId).OnDelete(DeleteBehavior.Restrict);

            e.HasIndex(x => new { x.OrganizationId, x.ProductId });
        });

        b.Entity<Enter>(e =>
        {
            e.ToTable("enters");
            e.Property(x => x.Number).HasMaxLength(50).IsRequired();
            e.Property(x => x.Notes).HasMaxLength(1000);
            e.Property(x => x.Total).HasPrecision(18, 4);

            e.HasOne(x => x.Store).WithMany().HasForeignKey(x => x.StoreId).OnDelete(DeleteBehavior.Restrict);
            e.HasOne(x => x.Currency).WithMany().HasForeignKey(x => x.CurrencyId).OnDelete(DeleteBehavior.Restrict);

            e.HasMany(x => x.Lines).WithOne(l => l.Enter).HasForeignKey(l => l.EnterId).OnDelete(DeleteBehavior.Cascade);

            e.HasIndex(x => new { x.OrganizationId, x.Number }).IsUnique();
            e.HasIndex(x => new { x.OrganizationId, x.Date });
            e.HasIndex(x => new { x.OrganizationId, x.Status });
        });

        b.Entity<EnterLine>(e =>
        {
            e.ToTable("enter_lines");
            e.Property(x => x.Quantity).HasPrecision(18, 4);
            e.Property(x => x.UnitCost).HasPrecision(18, 4);
            e.Property(x => x.LineTotal).HasPrecision(18, 4);

            e.HasOne(x => x.Product).WithMany().HasForeignKey(x => x.ProductId).OnDelete(DeleteBehavior.Restrict);

            e.HasIndex(x => new { x.OrganizationId, x.ProductId });
        });

        b.Entity<SupplierReturn>(e =>
        {
            e.ToTable("supplier_returns");
            e.Property(x => x.Number).HasMaxLength(50).IsRequired();
            e.Property(x => x.Notes).HasMaxLength(1000);
            e.Property(x => x.Total).HasPrecision(18, 4);

            e.HasOne(x => x.Supplier).WithMany().HasForeignKey(x => x.SupplierId).OnDelete(DeleteBehavior.Restrict);
            e.HasOne(x => x.Store).WithMany().HasForeignKey(x => x.StoreId).OnDelete(DeleteBehavior.Restrict);
            e.HasOne(x => x.Currency).WithMany().HasForeignKey(x => x.CurrencyId).OnDelete(DeleteBehavior.Restrict);
            e.HasOne(x => x.ReferenceSupply).WithMany().HasForeignKey(x => x.ReferenceSupplyId).OnDelete(DeleteBehavior.Restrict);

            e.HasMany(x => x.Lines).WithOne(l => l.SupplierReturn).HasForeignKey(l => l.SupplierReturnId).OnDelete(DeleteBehavior.Cascade);

            e.HasIndex(x => new { x.OrganizationId, x.Number }).IsUnique();
            e.HasIndex(x => new { x.OrganizationId, x.Date });
            e.HasIndex(x => new { x.OrganizationId, x.Status });
            e.HasIndex(x => new { x.OrganizationId, x.SupplierId });
            e.HasIndex(x => x.ReferenceSupplyId);
        });

        b.Entity<SupplierReturnLine>(e =>
        {
            e.ToTable("supplier_return_lines");
            e.Property(x => x.Quantity).HasPrecision(18, 4);
            e.Property(x => x.UnitPrice).HasPrecision(18, 4);
            e.Property(x => x.LineTotal).HasPrecision(18, 4);

            e.HasOne(x => x.Product).WithMany().HasForeignKey(x => x.ProductId).OnDelete(DeleteBehavior.Restrict);

            e.HasIndex(x => new { x.OrganizationId, x.ProductId });
        });
    }
}