package mastermgr

import (
	"context"

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"

	"github.com/tidbcloud/infra-provider/pkg/deploy"
)

// NOTE: DON'T delete namespace, we may lost some resources like PVC if we have

const (
	// See https://kubernetes-sigs.github.io/aws-load-balancer-controller/v2.4/deploy/pod_readiness_gate/
	labelKeyNLBPodReadinessGateInject        = "elbv2.k8s.aws/pod-readiness-gate-inject"
	labelValNLBPodReadinessGateInjectEnabled = "enabled"
)

type Namespace struct {
	*BaseTask
}

func NewNamespace(ctx *Context) *Namespace {
	return &Namespace{BaseTask: &BaseTask{Context: ctx}}
}

func (t *Namespace) Name() string {
	return "Namespace"
}

func (t *Namespace) Create(ctx context.Context) deploy.Result {
	cli, err := t.Remote.GetClient(ctx)
	if err != nil {
		return deploy.Panic(err)
	}
	ns := &corev1.Namespace{
		ObjectMeta: metav1.ObjectMeta{
			Name: t.Namer.GetTiflowNamespace(),
			Labels: map[string]string{
				labelKeyNLBPodReadinessGateInject: labelValNLBPodReadinessGateInjectEnabled,
			},
		},
	}
	_, err = controllerutil.CreateOrUpdate(ctx, cli, ns, func() error { return nil })
	if err != nil {
		return deploy.ErrorOrDone(err)
	}
	return deploy.Done()
}

func (t *Namespace) PostCreate(ctx context.Context) deploy.Result {
	cli, err := t.Remote.GetClient(ctx)
	if err != nil {
		return deploy.Panic(err)
	}

	var ns corev1.Namespace
	if err = cli.Get(ctx, types.NamespacedName{Name: t.Namer.GetTiflowNamespace()}, &ns); err != nil {
		return deploy.Error(err)
	}
	return deploy.Done()
}