package controllers

import (
	formolv1alpha1 "github.com/desmo999r/formol/api/v1alpha1"
	batchv1 "k8s.io/api/batch/v1"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
)

func (r *BackupConfigurationReconciler) DeleteCronJob(backupConf formolv1alpha1.BackupConfiguration) error {
	cronjob := &batchv1.CronJob{}
	if err := r.Get(r.Context, client.ObjectKey{
		Namespace: backupConf.Namespace,
		Name:      "backup-" + backupConf.Name,
	}, cronjob); err == nil {
		r.Log.V(0).Info("Deleting cronjob", "cronjob", cronjob.Name)
		return r.Delete(r.Context, cronjob)
	} else {
		return err
	}
}

func (r *BackupConfigurationReconciler) AddCronJob(backupConf formolv1alpha1.BackupConfiguration) error {
	cronjob := &batchv1.CronJob{}
	if err := r.Get(r.Context, client.ObjectKey{
		Namespace: backupConf.Namespace,
		Name:      "backup-" + backupConf.Name,
	}, cronjob); err == nil {
		r.Log.V(0).Info("there is already a cronjob")
		var changed bool
		if backupConf.Spec.Schedule != cronjob.Spec.Schedule {
			r.Log.V(0).Info("cronjob schedule has changed", "old schedule", cronjob.Spec.Schedule, "new schedule", backupConf.Spec.Schedule)
			cronjob.Spec.Schedule = backupConf.Spec.Schedule
			changed = true
		}
		if backupConf.Spec.Suspend != nil && backupConf.Spec.Suspend != cronjob.Spec.Suspend {
			r.Log.V(0).Info("cronjob suspend has changed", "before", cronjob.Spec.Suspend, "new", backupConf.Spec.Suspend)
			cronjob.Spec.Suspend = backupConf.Spec.Suspend
			changed = true
		}
		if changed == true {
			if err := r.Update(r.Context, cronjob); err != nil {
				r.Log.Error(err, "unable to update cronjob definition")
				return err
			}
			backupConf.Status.Suspended = *backupConf.Spec.Suspend
		}
		return nil
	} else if errors.IsNotFound(err) == false {
		r.Log.Error(err, "something went wrong")
		return err
	}

	cronjob = &batchv1.CronJob{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "backup-" + backupConf.Name,
			Namespace: backupConf.Namespace,
		},
		Spec: batchv1.CronJobSpec{
			Suspend:  backupConf.Spec.Suspend,
			Schedule: backupConf.Spec.Schedule,
			JobTemplate: batchv1.JobTemplateSpec{
				Spec: batchv1.JobSpec{
					Template: corev1.PodTemplateSpec{
						Spec: corev1.PodSpec{
							RestartPolicy:      corev1.RestartPolicyOnFailure,
							ServiceAccountName: "backupsession-creator",
							Containers: []corev1.Container{
								corev1.Container{
									Name:  "job-createbackupsession-" + backupConf.Name,
									Image: backupConf.Spec.Image,
									Args: []string{
										"backupsession",
										"create",
										"--namespace",
										backupConf.Namespace,
										"--name",
										backupConf.Name,
									},
								},
							},
						},
					},
				},
			},
		},
	}
	if err := ctrl.SetControllerReference(&backupConf, cronjob, r.Scheme); err != nil {
		r.Log.Error(err, "unable to set controller on job", "cronjob", cronjob, "backupconf", backupConf)
		return err
	}
	r.Log.V(0).Info("creating the cronjob")
	if err := r.Create(r.Context, cronjob); err != nil {
		r.Log.Error(err, "unable to create the cronjob", "cronjob", cronjob)
		return err
	} else {
		return nil
	}
}