/*
Copyright 2016 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 v2alpha1

import (
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/pkg/api/v1"
	batchv1 "k8s.io/client-go/pkg/apis/batch/v1"
)

// JobTemplate describes a template for creating copies of a predefined pod.
type JobTemplate struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object's metadata.
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Template defines jobs that will be created from this template
	// http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status
	// +optional
	Template JobTemplateSpec `json:"template,omitempty" protobuf:"bytes,2,opt,name=template"`
}

// JobTemplateSpec describes the data a Job should have when created from a template
type JobTemplateSpec struct {
	// Standard object's metadata of the jobs created from this template.
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Specification of the desired behavior of the job.
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status
	// +optional
	Spec batchv1.JobSpec `json:"spec,omitempty" protobuf:"bytes,2,opt,name=spec"`
}

// +genclient=true

// CronJob represents the configuration of a single cron job.
type CronJob struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object's metadata.
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Spec is a structure defining the expected behavior of a job, including the schedule.
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status
	// +optional
	Spec CronJobSpec `json:"spec,omitempty" protobuf:"bytes,2,opt,name=spec"`

	// Status is a structure describing current status of a job.
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status
	// +optional
	Status CronJobStatus `json:"status,omitempty" protobuf:"bytes,3,opt,name=status"`
}

// CronJobList is a collection of cron jobs.
type CronJobList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
	// +optional
	metav1.ListMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Items is the list of CronJob.
	Items []CronJob `json:"items" protobuf:"bytes,2,rep,name=items"`
}

// CronJobSpec describes how the job execution will look like and when it will actually run.
type CronJobSpec struct {

	// Schedule contains the schedule in Cron format, see https://en.wikipedia.org/wiki/Cron.
	Schedule string `json:"schedule" protobuf:"bytes,1,opt,name=schedule"`

	// Optional deadline in seconds for starting the job if it misses scheduled
	// time for any reason.  Missed jobs executions will be counted as failed ones.
	// +optional
	StartingDeadlineSeconds *int64 `json:"startingDeadlineSeconds,omitempty" protobuf:"varint,2,opt,name=startingDeadlineSeconds"`

	// ConcurrencyPolicy specifies how to treat concurrent executions of a Job.
	// Defaults to Allow.
	// +optional
	ConcurrencyPolicy ConcurrencyPolicy `json:"concurrencyPolicy,omitempty" protobuf:"bytes,3,opt,name=concurrencyPolicy,casttype=ConcurrencyPolicy"`

	// Suspend flag tells the controller to suspend subsequent executions, it does
	// not apply to already started executions.  Defaults to false.
	// +optional
	Suspend *bool `json:"suspend,omitempty" protobuf:"varint,4,opt,name=suspend"`

	// JobTemplate is the object that describes the job that will be created when
	// executing a CronJob.
	JobTemplate JobTemplateSpec `json:"jobTemplate" protobuf:"bytes,5,opt,name=jobTemplate"`

	// The number of successful finished jobs to retain.
	// This is a pointer to distinguish between explicit zero and not specified.
	// +optional
	SuccessfulJobsHistoryLimit *int32 `json:"successfulJobsHistoryLimit,omitempty" protobuf:"varint,6,opt,name=successfulJobsHistoryLimit"`

	// The number of failed finished jobs to retain.
	// This is a pointer to distinguish between explicit zero and not specified.
	// +optional
	FailedJobsHistoryLimit *int32 `json:"failedJobsHistoryLimit,omitempty" protobuf:"varint,7,opt,name=failedJobsHistoryLimit"`
}

// ConcurrencyPolicy describes how the job will be handled.
// Only one of the following concurrent policies may be specified.
// If none of the following policies is specified, the default one
// is AllowConcurrent.
type ConcurrencyPolicy string

const (
	// AllowConcurrent allows CronJobs to run concurrently.
	AllowConcurrent ConcurrencyPolicy = "Allow"

	// ForbidConcurrent forbids concurrent runs, skipping next run if previous
	// hasn't finished yet.
	ForbidConcurrent ConcurrencyPolicy = "Forbid"

	// ReplaceConcurrent cancels currently running job and replaces it with a new one.
	ReplaceConcurrent ConcurrencyPolicy = "Replace"
)

// CronJobStatus represents the current state of a cron job.
type CronJobStatus struct {
	// Active holds pointers to currently running jobs.
	// +optional
	Active []v1.ObjectReference `json:"active,omitempty" protobuf:"bytes,1,rep,name=active"`

	// LastScheduleTime keeps information of when was the last time the job was successfully scheduled.
	// +optional
	LastScheduleTime *metav1.Time `json:"lastScheduleTime,omitempty" protobuf:"bytes,4,opt,name=lastScheduleTime"`
}
