i am in 

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        // NOTE: Pivot tables for PPPoE plans and routers are now created in
        // tenant-specific migrations (database/migrations/tenant).
        // This root migration is kept for compatibility and is intentionally
        // a no-op on connections that do not have the tenant tables.

        if (!Schema::hasTable('pppoe_plans') || !Schema::hasTable('routers')) {
            // Nothing to do on this connection.
            return;
        }

        if (Schema::hasTable('pppoe_plan_routers')) {
            return;
        }

        Schema::create('pppoe_plan_routers', function (Blueprint $table) {
            $table->id();
            $table->foreignId('plan_id')->constrained('pppoe_plans')->onDelete('cascade');
            $table->foreignId('router_id')->constrained('routers')->onDelete('cascade');
            $table->enum('sync_status', ['pending', 'synced', 'failed', 'retrying'])->default('pending');
            $table->timestamp('last_synced_at')->nullable();
            $table->text('sync_error')->nullable();
            $table->timestamps();

            // Constraints
            $table->unique(['plan_id', 'router_id'], 'unique_pppoe_plan_router');

            // Indexes for performance
            $table->index('router_id', 'idx_pppoe_plan_routers_router');
            $table->index('sync_status', 'idx_pppoe_plan_routers_sync_status');
            $table->index(['plan_id', 'router_id'], 'idx_pppoe_plan_routers_plan_router');
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('pppoe_plan_routers');
    }
};