package kubernetes

import (
	"path/filepath"

	k8sRegistry "github.com/go-kratos/kratos/contrib/registry/kubernetes/v2"
	"github.com/go-kratos/kratos/v2/log"

	k8s "k8s.io/client-go/kubernetes"
	k8sRest "k8s.io/client-go/rest"
	k8sTools "k8s.io/client-go/tools/clientcmd"
	k8sUtil "k8s.io/client-go/util/homedir"

	conf "github.com/tx7do/kratos-bootstrap/api/gen/go/conf/v1"
)

// NewRegistry 创建一个注册发现客户端 - Kubernetes
func NewRegistry(cfg *conf.Registry) *k8sRegistry.Registry {
	if cfg == nil || cfg.Kubernetes == nil {
		return nil
	}

	restConfig, err := k8sRest.InClusterConfig()
	if err != nil {
		home := k8sUtil.HomeDir()
		kubeConfig := filepath.Join(home, ".kube", "config")
		restConfig, err = k8sTools.BuildConfigFromFlags("", kubeConfig)
		if err != nil {
			log.Fatal(err)
			return nil
		}
	}

	clientSet, err := k8s.NewForConfig(restConfig)
	if err != nil {
		log.Fatal(err)
		return nil
	}

	var namespace string
	reg := k8sRegistry.NewRegistry(clientSet, namespace)

	return reg
}