using BlueLaminate.EFCore.Entities;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

namespace BlueLaminate.EFCore.Configurations;

public class SkinConfiguration : IEntityTypeConfiguration<Skin>
{
    public void Configure(EntityTypeBuilder<Skin> entity)
    {
        // Nullable: null means the catalogue gives no wear range (e.g. vanilla
        // knives), distinct from a genuine 0.0–1.0 range.
        entity.Property(e => e.FloatMin).HasColumnType("numeric(10,9)");
        entity.Property(e => e.FloatMax).HasColumnType("numeric(10,9)");

        entity.Property(e => e.TrueFloat)
            .HasComputedColumnSql("float_min = 0.0 AND float_max = 1.0", stored: true);

        entity.HasIndex(e => e.TrueFloat);

        // Slug is the natural key the sync upserts against.
        entity.HasIndex(e => e.Slug).IsUnique();

        // Market listings join back to a skin by (def_index, paint_index). Unique
        // among populated rows; filtered so the many catalogue rows that predate
        // these columns (null) don't collide. Postgres treats nulls as distinct
        // anyway, but the filter makes the intent explicit and the index smaller.
        entity.HasIndex(e => new { e.DefIndex, e.PaintIndex })
            .IsUnique()
            .HasFilter("def_index IS NOT NULL AND paint_index IS NOT NULL");

        // Per-site "last swept" checkpoints live in skin_sweeps (one row per site);
        // see SkinSweepConfiguration for the indexes that order them.

        entity.HasOne(e => e.Weapon)
            .WithMany(w => w.Skins)
            .HasForeignKey(e => e.WeaponId);

        // A skin can come from many collections and containers, and each of those
        // holds many skins.
        entity.HasMany(e => e.Collections)
            .WithMany(c => c.Skins)
            .UsingEntity(join => join.ToTable("skin_collections"));
    }
}