/*
Copyright 2019 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package job

import (
	batchv1 "k8s.io/api/batch/v1"
	"k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/kubernetes/test/e2e/framework"
)

// NewTestJob returns a Job which does one of several testing behaviors. notTerminate starts a Job that will run
// effectively forever. fail starts a Job that will fail immediately. succeed starts a Job that will succeed
// immediately. randomlySucceedOrFail starts a Job that will succeed or fail randomly. failOnce fails the Job the
// first time it is run and succeeds subsequently. name is the Name of the Job. RestartPolicy indicates the restart
// policy of the containers in which the Pod is running. Parallelism is the Job's parallelism, and completions is the
// Job's required number of completions.
func NewTestJob(behavior, name string, rPol v1.RestartPolicy, parallelism, completions int32, activeDeadlineSeconds *int64, backoffLimit int32) *batchv1.Job {
	manualSelector := false
	job := &batchv1.Job{
		ObjectMeta: metav1.ObjectMeta{
			Name: name,
		},
		TypeMeta: metav1.TypeMeta{
			Kind: "Job",
		},
		Spec: batchv1.JobSpec{
			ActiveDeadlineSeconds: activeDeadlineSeconds,
			Parallelism:           &parallelism,
			Completions:           &completions,
			BackoffLimit:          &backoffLimit,
			ManualSelector:        &manualSelector,
			Template: v1.PodTemplateSpec{
				ObjectMeta: metav1.ObjectMeta{
					Labels: map[string]string{JobSelectorKey: name},
				},
				Spec: v1.PodSpec{
					RestartPolicy: rPol,
					Volumes: []v1.Volume{
						{
							Name: "data",
							VolumeSource: v1.VolumeSource{
								EmptyDir: &v1.EmptyDirVolumeSource{},
							},
						},
					},
					Containers: []v1.Container{
						{
							Name:    "c",
							Image:   framework.BusyBoxImage,
							Command: []string{},
							VolumeMounts: []v1.VolumeMount{
								{
									MountPath: "/data",
									Name:      "data",
								},
							},
						},
					},
				},
			},
		},
	}
	switch behavior {
	case "notTerminate":
		job.Spec.Template.Spec.Containers[0].Command = []string{"sleep", "1000000"}
	case "fail":
		job.Spec.Template.Spec.Containers[0].Command = []string{"/bin/sh", "-c", "exit 1"}
	case "succeed":
		job.Spec.Template.Spec.Containers[0].Command = []string{"/bin/sh", "-c", "exit 0"}
	case "randomlySucceedOrFail":
		// Bash's $RANDOM generates pseudorandom int in range 0 - 32767.
		// Dividing by 16384 gives roughly 50/50 chance of success.
		job.Spec.Template.Spec.Containers[0].Command = []string{"/bin/sh", "-c", "exit $(( $RANDOM / 16384 ))"}
	case "failOnce":
		// Fail the first the container of the pod is run, and
		// succeed the second time. Checks for file on emptydir.
		// If present, succeed.  If not, create but fail.
		// Note that this cannot be used with RestartNever because
		// it always fails the first time for a pod.
		job.Spec.Template.Spec.Containers[0].Command = []string{"/bin/sh", "-c", "if [[ -r /data/foo ]] ; then exit 0 ; else touch /data/foo ; exit 1 ; fi"}
	}
	return job
}

// FinishTime returns finish time of the specified job.
func FinishTime(finishedJob *batchv1.Job) metav1.Time {
	var finishTime metav1.Time
	for _, c := range finishedJob.Status.Conditions {
		if (c.Type == batchv1.JobComplete || c.Type == batchv1.JobFailed) && c.Status == v1.ConditionTrue {
			return c.LastTransitionTime
		}
	}
	return finishTime
}
