package k8s

import (
	"fmt"

	"github.com/omnex/control-plane/api/internal/config"

	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/rest"
	"k8s.io/client-go/tools/clientcmd"
	metricsclient "k8s.io/metrics/pkg/client/clientset/versioned"
)

func restConfig(cfg *config.Config) (*rest.Config, error) {
	if cfg.Kubeconfig != "" {
		return clientcmd.BuildConfigFromFlags("", cfg.Kubeconfig)
	}
	return rest.InClusterConfig()
}

func NewClient(cfg *config.Config) (*kubernetes.Clientset, error) {
	k8sCfg, err := restConfig(cfg)
	if err != nil {
		return nil, fmt.Errorf("k8s config: %w", err)
	}

	client, err := kubernetes.NewForConfig(k8sCfg)
	if err != nil {
		return nil, fmt.Errorf("k8s clientset: %w", err)
	}

	return client, nil
}

// NewMetricsClient crée un client pour l'API metrics.k8s.io (metrics-server),
// utilisée pour lire l'usage CPU/mémoire en direct des pods.
func NewMetricsClient(cfg *config.Config) (*metricsclient.Clientset, error) {
	k8sCfg, err := restConfig(cfg)
	if err != nil {
		return nil, fmt.Errorf("k8s config: %w", err)
	}

	client, err := metricsclient.NewForConfig(k8sCfg)
	if err != nil {
		return nil, fmt.Errorf("metrics clientset: %w", err)
	}

	return client, nil
}