// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 v1alpha1

import (
	apierrors "k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/util/validation/field"
	ctrl "sigs.k8s.io/controller-runtime"
	logf "sigs.k8s.io/controller-runtime/pkg/log"
	"sigs.k8s.io/controller-runtime/pkg/webhook"
)

// log is for logging in this package.
var dsmasterlog = logf.Log.WithName("dsmaster-resource")

func (r *DSMaster) SetupWebhookWithManager(mgr ctrl.Manager) error {
	return ctrl.NewWebhookManagedBy(mgr).
		For(r).
		Complete()
}

// TODO(user): EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!

//+kubebuilder:webhook:path=/mutate-ds-apache-dolphinscheduler-dev-v1alpha1-dsmaster,mutating=true,failurePolicy=fail,sideEffects=None,groups=ds.apache.dolphinscheduler.dev,resources=dsmasters,verbs=create;update,versions=v1alpha1,name=mdsmaster.kb.io,admissionReviewVersions=v1

var _ webhook.Defaulter = &DSMaster{}

// Default implements webhook.Defaulter so a webhook will be registered for the type
func (r *DSMaster) Default() {

	if r.Spec.HpaPolicy != nil {
		if &r.Spec.HpaPolicy.MinReplicas == nil {
			r.Spec.HpaPolicy.MinReplicas = int32(1)
		}

		if &r.Spec.HpaPolicy.MaxReplicas == nil {
			r.Spec.HpaPolicy.MinReplicas = int32(5)
		}
	}

}

// TODO(user): change verbs to "verbs=create;update;delete" if you want to enable deletion validation.
//+kubebuilder:webhook:path=/validate-ds-apache-dolphinscheduler-dev-v1alpha1-dsmaster,mutating=false,failurePolicy=fail,sideEffects=None,groups=ds.apache.dolphinscheduler.dev,resources=dsmasters,verbs=create;update,versions=v1alpha1,name=vdsmaster.kb.io,admissionReviewVersions=v1

var _ webhook.Validator = &DSMaster{}

// ValidateCreate implements webhook.Validator so a webhook will be registered for the type
func (r *DSMaster) ValidateCreate() error {
	var allErrs field.ErrorList

	if r.Spec.HpaPolicy != nil {
		if &r.Spec.HpaPolicy.MinReplicas != nil && &r.Spec.HpaPolicy.MaxReplicas != nil && r.Spec.HpaPolicy.MinReplicas > r.Spec.HpaPolicy.MaxReplicas {
			return apierrors.NewInvalid(
				schema.GroupKind{Group: "ds", Kind: "DSMaster"},
				r.Name,
				allErrs)
		}

	} else {
		dsmasterlog.Info("Hpa `s replicas is valid")
		return nil
	}
	return nil
}

// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type
func (r *DSMaster) ValidateUpdate(old runtime.Object) error {
	dsmasterlog.Info("validate update", "name", r.Name)

	// TODO(user): fill in your validation logic upon object update.
	return nil
}

// ValidateDelete implements webhook.Validator so a webhook will be registered for the type
func (r *DSMaster) ValidateDelete() error {
	dsmasterlog.Info("validate delete", "name", r.Name)

	// TODO(user): fill in your validation logic upon object deletion.
	return nil
}