using Microsoft.EntityFrameworkCore;
using WordVersioning.Api.Models;

namespace WordVersioning.Api.Data;

public class AppDbContext(DbContextOptions<AppDbContext> options) : DbContext(options)
{
    public DbSet<Document> Documents => Set<Document>();

    public DbSet<DocumentVersion> DocumentVersions => Set<DocumentVersion>();

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Document>(entity =>
        {
            entity.HasKey(x => x.Id);
            entity.Property(x => x.FileName).HasMaxLength(512);
            entity.Property(x => x.AddInSignature).HasMaxLength(64);
        });

        modelBuilder.Entity<DocumentVersion>(entity =>
        {
            entity.HasKey(x => x.Id);

            // กัน versionNumber ซ้ำตอน upload พร้อมกัน (retry ที่ controller เมื่อชน constraint)
            entity.HasIndex(x => new { x.DocumentId, x.VersionNumber }).IsUnique();

            entity.Property(x => x.ObjectKey).HasMaxLength(1024);
            entity.Property(x => x.ContentHash).HasMaxLength(64);

            entity.HasOne(x => x.Document)
                .WithMany(d => d.Versions)
                .HasForeignKey(x => x.DocumentId);
        });
    }
}