using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Nuuru.Server.Models.Booru;

namespace Nuuru.Server.Data.EntityConfigurations
{
    public class CommentMentionConfiguration : IEntityTypeConfiguration<CommentMention>
    {
        public void Configure(EntityTypeBuilder<CommentMention> builder)
        {
            builder.HasKey(cm => new { cm.CommentId, cm.MentionedUserId });

            builder.HasOne(cm => cm.Comment)
                .WithMany(c => c.Mentions)
                .HasForeignKey(cm => cm.CommentId)
                .OnDelete(DeleteBehavior.Cascade);

            // Cascade delete: when mentioned user is deleted, remove mention records
            builder.HasOne(cm => cm.MentionedUser)
                .WithMany()
                .HasForeignKey(cm => cm.MentionedUserId)
                .OnDelete(DeleteBehavior.Cascade);

            builder.HasIndex(cm => cm.MentionedUserId);
        }
    }
}