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

namespace Nuuru.Server.Data.Configurations
{
    public class NotificationConfiguration : IEntityTypeConfiguration<Notification>
    {
        public void Configure(EntityTypeBuilder<Notification> builder)
        {
            builder.HasKey(n => n.Id);

            builder.HasIndex(n => new { n.UserId, n.IsRead, n.CreatedAt });

            // Cascade delete: when user is deleted, remove their notifications
            builder.HasOne(n => n.User)
                .WithMany(u => u.Notifications)
                .HasForeignKey(n => n.UserId)
                .OnDelete(DeleteBehavior.Cascade);

            // User who triggered the notification (optional)
            builder.HasOne(n => n.TriggeredByUser)
                .WithMany()
                .HasForeignKey(n => n.TriggeredByUserId)
                .OnDelete(DeleteBehavior.SetNull);
        }
    }
}