package node

import (
	"context"
	"fmt"

	apierrors "k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/klog/v2"

	"undecided.project/monok8s/pkg/crds"
	"undecided.project/monok8s/pkg/kube"
)

func ApplyCRDs(ctx context.Context, n *NodeContext) error {
	if n.Config.Spec.ClusterRole != "control-plane" {
		return nil
	}

	const kubeconfig = "/etc/kubernetes/admin.conf"

	clients, err := kube.NewClientsFromKubeconfig(kubeconfig)
	if err != nil {
		return fmt.Errorf("build kube clients from %s: %w", kubeconfig, err)
	}

	crdClient := clients.APIExtensions.ApiextensionsV1().CustomResourceDefinitions()

	for _, wanted := range crds.Definitions() {
		_, err := crdClient.Create(ctx, wanted, metav1.CreateOptions{})
		if err == nil {
			klog.InfoS("crd created", "name", wanted.Name)
			continue
		}

		if !apierrors.IsAlreadyExists(err) {
			return fmt.Errorf("create CRD %s: %w", wanted.Name, err)
		}

		current, getErr := crdClient.Get(ctx, wanted.Name, metav1.GetOptions{})
		if getErr != nil {
			return fmt.Errorf("get existing CRD %s: %w", wanted.Name, getErr)
		}

		updated := wanted.DeepCopy()
		updated.ResourceVersion = current.ResourceVersion

		_, err = crdClient.Update(ctx, updated, metav1.UpdateOptions{})
		if err != nil {
			return fmt.Errorf("update CRD %s: %w", wanted.Name, err)
		}

		klog.InfoS("crd updated", "name", wanted.Name)
	}

	return nil
}