/*
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 simulator

import (
	apiv1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	scheduler_nodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
)

// PredicateChecker checks whether all required predicates pass for given Pod and Node.
type PredicateChecker interface {
	// TODO remove
	SnapshotClusterState() error
	// TODO drop "nodeInfos map[string]*scheduler_nodeinfo.NodeInfo" and check against schedulerLister
	FitsAnyNode(clusterSnapshot ClusterSnapshot, pod *apiv1.Pod, nodeInfos map[string]*scheduler_nodeinfo.NodeInfo) (string, error)
	// TODO replace "*scheduler_nodeinfo.NodeInfo" with node name and expect nodeInfo to be part of schedulerLister
	//      until then use FakeNodeInfoForNodeName when clusterSnapshot is passed
	CheckPredicates(clusterSnapshot ClusterSnapshot, pod *apiv1.Pod, nodeInfo *scheduler_nodeinfo.NodeInfo) PredicateError
}

// FakeNodeInfoForNodeName is used to generate fake node info which passes just a name
func FakeNodeInfoForNodeName(name string) *scheduler_nodeinfo.NodeInfo {
	nodeInfo := scheduler_nodeinfo.NewNodeInfo()
	node := &apiv1.Node{
		ObjectMeta: metav1.ObjectMeta{
			Name: name,
		},
	}

	nodeInfo.SetNode(node)
	return nodeInfo
}