package job

import (
	"context"
	"pandax/base/global"

	"go.uber.org/zap"
	batch "k8s.io/api/batch/v1"
	v1 "k8s.io/api/core/v1"
	metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/fields"
	"k8s.io/apimachinery/pkg/labels"
	"k8s.io/client-go/kubernetes"
	"pandax/apps/devops/entity/k8s"
	k8scommon "pandax/apps/devops/services/k8s/common"
	"pandax/apps/devops/services/k8s/event"
	"pandax/apps/devops/services/k8s/pods"
)

type PodList struct {
	ListMeta k8s.ListMeta `json:"listMeta"`

	// Basic information about resources status on the list.
	Status k8scommon.ResourceStatus `json:"status"`

	// Unordered list of Pods.
	Pods []pods.Pod `json:"pods"`
}

// Returns simple info about pods(running, desired, failing, etc.) related to given job.
func getJobPodInfo(client *kubernetes.Clientset, job *batch.Job) (*k8scommon.PodInfo, error) {
	labelSelector := labels.SelectorFromSet(job.Spec.Selector.MatchLabels)
	channels := &k8scommon.ResourceChannels{
		PodList: k8scommon.GetPodListChannelWithOptions(client, k8scommon.NewSameNamespaceQuery(
			job.Namespace),
			metaV1.ListOptions{
				LabelSelector: labelSelector.String(),
				FieldSelector: fields.Everything().String(),
			}, 1),
	}

	podList := <-channels.PodList.List
	if err := <-channels.PodList.Error; err != nil {
		return nil, err
	}

	podInfo := k8scommon.GetPodInfo(job.Status.Active, job.Spec.Completions, podList.Items)

	// This pod info for jobs should be get from job status, similar to kubectl describe logic.
	podInfo.Running = job.Status.Active
	podInfo.Succeeded = job.Status.Succeeded
	podInfo.Failed = job.Status.Failed
	return &podInfo, nil
}

func getJobToPod(client *kubernetes.Clientset, job *batch.Job) (po *PodList) {

	selector, err := metaV1.LabelSelectorAsSelector(job.Spec.Selector)
	if err != nil {
		return nil
	}
	options := metaV1.ListOptions{LabelSelector: selector.String()}

	podData, err := client.CoreV1().Pods(job.Namespace).List(context.TODO(), options)
	if err != nil {
		global.Log.Error("Get a pod exception from the job", zap.Any("err", err))
	}
	podList := PodList{
		Pods: make([]pods.Pod, 0),
	}
	podList.ListMeta = k8s.ListMeta{TotalItems: len(podData.Items)}
	for _, pod := range podData.Items {
		warnings := event.GetPodsEventWarnings(nil, []v1.Pod{pod})
		podDetail := pods.ToPod(&pod, warnings)
		podList.Pods = append(podList.Pods, podDetail)
	}
	return &podList
}