package router

import (
	"context"

	"github.com/fission/fission/pkg/utils"
	"github.com/fission/fission/pkg/utils/manager"
)

type routerNamespaceAdder interface {
	AddNamespace(ctx context.Context, ns string, mgr manager.Interface) error
}

func NewNamespaceSubscriber(ts routerNamespaceAdder, mgr manager.Interface) utils.NamespaceSubscriber {
	return utils.NamespaceSubscriberFuncs{
		SubscriberName: "router",
		AddFunc: func(ctx context.Context, record utils.NamespaceRecord) error {
			return registerRouterNamespace(ctx, record.Name, ts, mgr)
		},
		ResyncFunc: func(ctx context.Context, record utils.NamespaceRecord) error {
			return registerRouterNamespace(ctx, record.Name, ts, mgr)
		},
	}
}

func registerRouterNamespace(ctx context.Context, namespace string, ts routerNamespaceAdder, mgr manager.Interface) error {
	if namespace == "" || ts == nil {
		return nil
	}
	return ts.AddNamespace(ctx, namespace, mgr)
}