package runtime

import (
	"context"
	"fmt"
	"reflect"
	"sort"
	"time"

	v1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/sets"
	"k8s.io/client-go/informers"
	clientset "k8s.io/client-go/kubernetes"
	"k8s.io/client-go/tools/events"
	"k8s.io/component-helpers/scheduling/corev1"
	"k8s.io/klog/v2"
	"k8s.io/kube-scheduler/config/v1beta1"
	"k8s.io/kubernetes/pkg/scheduler/apis/config"
	"k8s.io/kubernetes/pkg/scheduler/apis/config/scheme"
	"k8s.io/kubernetes/pkg/scheduler/framework"
	"k8s.io/kubernetes/pkg/scheduler/internal/parallelize"
	"k8s.io/kubernetes/pkg/scheduler/metrics"
)

const (

	Filter = "Filter"

	maxTimeout                  = 15 * time.Minute
	preFilter                   = "PreFilter"
	preFilterExtensionAddPod    = "PreFilterExtensionAddPod"
	preFilterExtensionRemovePod = "PreFilterExtensionRemovePod"
	postFilter                  = "PostFilter"
	preScore                    = "PreScore"
	score                       = "Score"
	scoreExtensionNormalize     = "ScoreExtensionNormalize"
	preBind                     = "PreBind"
	bind                        = "Bind"
	postBind                    = "PostBind"
	reserve                     = "Reserve"
	unreserve                   = "Unreserve"
	permit                      = "Permit"
)

var allClusterEvents = []framework.ClusterEvent{
	{Resource: framework.Pod, ActionType: framework.All},
	{Resource: framework.Node, ActionType: framework.All},
	{Resource: framework.CSINode, ActionType: framework.All},
	{Resource: framework.PersistentVolume, ActionType: framework.All},
	{Resource: framework.PersistentVolumeClaim, ActionType: framework.All},
	{Resource: framework.Service, ActionType: framework.All},
	{Resource: framework.StorageClass, ActionType: framework.All},
}

var configDecoder = scheme.Codecs.UniversalDecoder()

type frameworkImpl struct {
	registry              Registry
	snapshotSharedLister  framework.SharedLister
	waitingPods           *waitingPodsMap
	pluginNameToWeightMap map[string]int
	queueSortPlugins      []framework.QueueSortPlugin
	preFilterPlugins      []framework.PreFilterPlugin
	filterPlugins         []framework.FilterPlugin
	postFilterPlugins     []framework.PostFilterPlugin
	preScorePlugins       []framework.PreScorePlugin
	scorePlugins          []framework.ScorePlugin
	reservePlugins        []framework.ReservePlugin
	preBindPlugins        []framework.PreBindPlugin
	bindPlugins           []framework.BindPlugin
	postBindPlugins       []framework.PostBindPlugin
	permitPlugins         []framework.PermitPlugin

	clientSet       clientset.Interface
	eventRecorder   events.EventRecorder
	informerFactory informers.SharedInformerFactory

	metricsRecorder *metricsRecorder
	profileName     string

	extenders []framework.Extender
	framework.PodNominator

	runAllFilters bool
}

type extensionPoint struct {

	plugins config.PluginSet

	slicePtr interface{}
}

func (f *frameworkImpl) getExtensionPoints(plugins *config.Plugins) []extensionPoint {
	return []extensionPoint{
		{plugins.PreFilter, &f.preFilterPlugins},
		{plugins.Filter, &f.filterPlugins},
		{plugins.PostFilter, &f.postFilterPlugins},
		{plugins.Reserve, &f.reservePlugins},
		{plugins.PreScore, &f.preScorePlugins},
		{plugins.Score, &f.scorePlugins},
		{plugins.PreBind, &f.preBindPlugins},
		{plugins.Bind, &f.bindPlugins},
		{plugins.PostBind, &f.postBindPlugins},
		{plugins.Permit, &f.permitPlugins},
		{plugins.QueueSort, &f.queueSortPlugins},
	}
}

func (f *frameworkImpl) Extenders() []framework.Extender {
	return f.extenders
}

type frameworkOptions struct {
	clientSet            clientset.Interface
	eventRecorder        events.EventRecorder
	informerFactory      informers.SharedInformerFactory
	snapshotSharedLister framework.SharedLister
	metricsRecorder      *metricsRecorder
	profileName          string
	podNominator         framework.PodNominator
	extenders            []framework.Extender
	runAllFilters        bool
	captureProfile       CaptureProfile
	clusterEventMap      map[framework.ClusterEvent]sets.String
}

type Option func(*frameworkOptions)

func WithClientSet(clientSet clientset.Interface) Option {
	return func(o *frameworkOptions) {
		o.clientSet = clientSet
	}
}

func WithEventRecorder(recorder events.EventRecorder) Option {
	return func(o *frameworkOptions) {
		o.eventRecorder = recorder
	}
}

func WithInformerFactory(informerFactory informers.SharedInformerFactory) Option {
	return func(o *frameworkOptions) {
		o.informerFactory = informerFactory
	}
}

func WithSnapshotSharedLister(snapshotSharedLister framework.SharedLister) Option {
	return func(o *frameworkOptions) {
		o.snapshotSharedLister = snapshotSharedLister
	}
}

func WithRunAllFilters(runAllFilters bool) Option {
	return func(o *frameworkOptions) {
		o.runAllFilters = runAllFilters
	}
}

func WithProfileName(name string) Option {
	return func(o *frameworkOptions) {
		o.profileName = name
	}
}

func withMetricsRecorder(recorder *metricsRecorder) Option {
	return func(o *frameworkOptions) {
		o.metricsRecorder = recorder
	}
}

func WithPodNominator(nominator framework.PodNominator) Option {
	return func(o *frameworkOptions) {
		o.podNominator = nominator
	}
}

func WithExtenders(extenders []framework.Extender) Option {
	return func(o *frameworkOptions) {
		o.extenders = extenders
	}
}

type CaptureProfile func(config.KubeSchedulerProfile)

func WithCaptureProfile(c CaptureProfile) Option {
	return func(o *frameworkOptions) {
		o.captureProfile = c
	}
}

func defaultFrameworkOptions() frameworkOptions {
	return frameworkOptions{
		metricsRecorder: newMetricsRecorder(1000, time.Second),
		clusterEventMap: make(map[framework.ClusterEvent]sets.String),
	}
}

func WithClusterEventMap(m map[framework.ClusterEvent]sets.String) Option {
	return func(o *frameworkOptions) {
		o.clusterEventMap = m
	}
}

var _ framework.Framework = &frameworkImpl{}

func NewFramework(r Registry, plugins *config.Plugins, args []config.PluginConfig, opts ...Option) (framework.Framework, error) {
	options := defaultFrameworkOptions()
	for _, opt := range opts {
		opt(&options)
	}

	f := &frameworkImpl{
		registry:              r,
		snapshotSharedLister:  options.snapshotSharedLister,
		pluginNameToWeightMap: make(map[string]int),
		waitingPods:           newWaitingPodsMap(),
		clientSet:             options.clientSet,
		eventRecorder:         options.eventRecorder,
		informerFactory:       options.informerFactory,
		metricsRecorder:       options.metricsRecorder,
		profileName:           options.profileName,
		runAllFilters:         options.runAllFilters,
		extenders:             options.extenders,
		PodNominator:          options.podNominator,
	}
	if plugins == nil {
		return f, nil
	}

	pg := f.pluginsNeeded(plugins)

	pluginConfig := make(map[string]runtime.Object, len(args))
	for i := range args {
		name := args[i].Name
		if _, ok := pluginConfig[name]; ok {
			return nil, fmt.Errorf("repeated config for plugin %s", name)
		}
		pluginConfig[name] = args[i].Args
	}
	outputProfile := config.KubeSchedulerProfile{
		SchedulerName: f.profileName,
		Plugins:       plugins,
		PluginConfig:  make([]config.PluginConfig, 0, len(pg)),
	}

	pluginsMap := make(map[string]framework.Plugin)
	var totalPriority int64
	for name, factory := range r {

		if _, ok := pg[name]; !ok {
			continue
		}

		args, err := getPluginArgsOrDefault(pluginConfig, name)
		if err != nil {
			return nil, fmt.Errorf("getting args for Plugin %q: %w", name, err)
		}
		if args != nil {
			outputProfile.PluginConfig = append(outputProfile.PluginConfig, config.PluginConfig{
				Name: name,
				Args: args,
			})
		}
		p, err := factory(args, f)
		if err != nil {
			return nil, fmt.Errorf("initializing plugin %q: %w", name, err)
		}
		pluginsMap[name] = p

		fillEventToPluginMap(p, options.clusterEventMap)

		f.pluginNameToWeightMap[name] = int(pg[name].Weight)
		if f.pluginNameToWeightMap[name] == 0 {
			f.pluginNameToWeightMap[name] = 1
		}

		if int64(f.pluginNameToWeightMap[name])*framework.MaxNodeScore > framework.MaxTotalScore-totalPriority {
			return nil, fmt.Errorf("total score of Score plugins could overflow")
		}
		totalPriority += int64(f.pluginNameToWeightMap[name]) * framework.MaxNodeScore
	}

	for _, e := range f.getExtensionPoints(plugins) {
		if err := updatePluginList(e.slicePtr, e.plugins, pluginsMap); err != nil {
			return nil, err
		}
	}

	for _, scorePlugin := range f.scorePlugins {
		if f.pluginNameToWeightMap[scorePlugin.Name()] == 0 {
			return nil, fmt.Errorf("score plugin %q is not configured with weight", scorePlugin.Name())
		}
	}

	if len(f.queueSortPlugins) == 0 {
		return nil, fmt.Errorf("no queue sort plugin is enabled")
	}
	if len(f.queueSortPlugins) > 1 {
		return nil, fmt.Errorf("only one queue sort plugin can be enabled")
	}
	if len(f.bindPlugins) == 0 {
		return nil, fmt.Errorf("at least one bind plugin is needed")
	}

	if options.captureProfile != nil {
		if len(outputProfile.PluginConfig) != 0 {
			sort.Slice(outputProfile.PluginConfig, func(i, j int) bool {
				return outputProfile.PluginConfig[i].Name < outputProfile.PluginConfig[j].Name
			})
		} else {
			outputProfile.PluginConfig = nil
		}
		options.captureProfile(outputProfile)
	}

	return f, nil
}

func fillEventToPluginMap(p framework.Plugin, eventToPlugins map[framework.ClusterEvent]sets.String) {
	ext, ok := p.(framework.EnqueueExtensions)
	if !ok {

		registerClusterEvents(p.Name(), eventToPlugins, allClusterEvents)
		return
	}

	events := ext.EventsToRegister()

	if len(events) == 0 {
		klog.InfoS("Plugin's EventsToRegister() returned nil", "plugin", p.Name())
		return
	}

	registerClusterEvents(p.Name(), eventToPlugins, events)
}

func registerClusterEvents(name string, eventToPlugins map[framework.ClusterEvent]sets.String, evts []framework.ClusterEvent) {
	for _, evt := range evts {
		if eventToPlugins[evt] == nil {
			eventToPlugins[evt] = sets.NewString(name)
		} else {
			eventToPlugins[evt].Insert(name)
		}
	}
}

func getPluginArgsOrDefault(pluginConfig map[string]runtime.Object, name string) (runtime.Object, error) {
	res, ok := pluginConfig[name]
	if ok {
		return res, nil
	}

	gvk := v1beta1.SchemeGroupVersion.WithKind(name + "Args")
	obj, _, err := configDecoder.Decode(nil, &gvk, nil)
	if runtime.IsNotRegisteredError(err) {

		return nil, nil
	}
	return obj, err
}

func updatePluginList(pluginList interface{}, pluginSet config.PluginSet, pluginsMap map[string]framework.Plugin) error {
	plugins := reflect.ValueOf(pluginList).Elem()
	pluginType := plugins.Type().Elem()
	set := sets.NewString()
	for _, ep := range pluginSet.Enabled {
		pg, ok := pluginsMap[ep.Name]
		if !ok {
			return fmt.Errorf("%s %q does not exist", pluginType.Name(), ep.Name)
		}

		if !reflect.TypeOf(pg).Implements(pluginType) {
			return fmt.Errorf("plugin %q does not extend %s plugin", ep.Name, pluginType.Name())
		}

		if set.Has(ep.Name) {
			return fmt.Errorf("plugin %q already registered as %q", ep.Name, pluginType.Name())
		}

		set.Insert(ep.Name)

		newPlugins := reflect.Append(plugins, reflect.ValueOf(pg))
		plugins.Set(newPlugins)
	}
	return nil
}

func (f *frameworkImpl) QueueSortFunc() framework.LessFunc {
	if f == nil {

		return func(_, _ *framework.QueuedPodInfo) bool { return false }
	}

	if len(f.queueSortPlugins) == 0 {
		panic("No QueueSort plugin is registered in the frameworkImpl.")
	}

	return f.queueSortPlugins[0].Less
}

func (f *frameworkImpl) RunPreFilterPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(preFilter, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.preFilterPlugins {
		status = f.runPreFilterPlugin(ctx, pl, state, pod)
		if !status.IsSuccess() {
			status.SetFailedPlugin(pl.Name())
			if status.IsUnschedulable() {
				return status
			}
			return framework.AsStatus(fmt.Errorf("running PreFilter plugin %q: %w", pl.Name(), status.AsError())).WithFailedPlugin(pl.Name())
		}
	}

	return nil
}

func (f *frameworkImpl) runPreFilterPlugin(ctx context.Context, pl framework.PreFilterPlugin, state *framework.CycleState, pod *v1.Pod) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreFilter(ctx, state, pod)
	}
	startTime := time.Now()
	status := pl.PreFilter(ctx, state, pod)
	f.metricsRecorder.observePluginDurationAsync(preFilter, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunPreFilterExtensionAddPod(
	ctx context.Context,
	state *framework.CycleState,
	podToSchedule *v1.Pod,
	podInfoToAdd *framework.PodInfo,
	nodeInfo *framework.NodeInfo,
) (status *framework.Status) {
	for _, pl := range f.preFilterPlugins {
		if pl.PreFilterExtensions() == nil {
			continue
		}
		status = f.runPreFilterExtensionAddPod(ctx, pl, state, podToSchedule, podInfoToAdd, nodeInfo)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running AddPod on PreFilter plugin", "plugin", pl.Name(), "pod", klog.KObj(podToSchedule))
			return framework.AsStatus(fmt.Errorf("running AddPod on PreFilter plugin %q: %w", pl.Name(), err))
		}
	}

	return nil
}

func (f *frameworkImpl) runPreFilterExtensionAddPod(ctx context.Context, pl framework.PreFilterPlugin, state *framework.CycleState, podToSchedule *v1.Pod, podInfoToAdd *framework.PodInfo, nodeInfo *framework.NodeInfo) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreFilterExtensions().AddPod(ctx, state, podToSchedule, podInfoToAdd, nodeInfo)
	}
	startTime := time.Now()
	status := pl.PreFilterExtensions().AddPod(ctx, state, podToSchedule, podInfoToAdd, nodeInfo)
	f.metricsRecorder.observePluginDurationAsync(preFilterExtensionAddPod, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunPreFilterExtensionRemovePod(
	ctx context.Context,
	state *framework.CycleState,
	podToSchedule *v1.Pod,
	podInfoToRemove *framework.PodInfo,
	nodeInfo *framework.NodeInfo,
) (status *framework.Status) {
	for _, pl := range f.preFilterPlugins {
		if pl.PreFilterExtensions() == nil {
			continue
		}
		status = f.runPreFilterExtensionRemovePod(ctx, pl, state, podToSchedule, podInfoToRemove, nodeInfo)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running RemovePod on PreFilter plugin", "plugin", pl.Name(), "pod", klog.KObj(podToSchedule))
			return framework.AsStatus(fmt.Errorf("running RemovePod on PreFilter plugin %q: %w", pl.Name(), err))
		}
	}

	return nil
}

func (f *frameworkImpl) runPreFilterExtensionRemovePod(ctx context.Context, pl framework.PreFilterPlugin, state *framework.CycleState, podToSchedule *v1.Pod, podInfoToRemove *framework.PodInfo, nodeInfo *framework.NodeInfo) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreFilterExtensions().RemovePod(ctx, state, podToSchedule, podInfoToRemove, nodeInfo)
	}
	startTime := time.Now()
	status := pl.PreFilterExtensions().RemovePod(ctx, state, podToSchedule, podInfoToRemove, nodeInfo)
	f.metricsRecorder.observePluginDurationAsync(preFilterExtensionRemovePod, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunFilterPlugins(
	ctx context.Context,
	state *framework.CycleState,
	pod *v1.Pod,
	nodeInfo *framework.NodeInfo,
) framework.PluginToStatus {
	statuses := make(framework.PluginToStatus)
	for _, pl := range f.filterPlugins {
		pluginStatus := f.runFilterPlugin(ctx, pl, state, pod, nodeInfo)
		if !pluginStatus.IsSuccess() {
			if !pluginStatus.IsUnschedulable() {

				errStatus := framework.AsStatus(fmt.Errorf("running %q filter plugin: %w", pl.Name(), pluginStatus.AsError())).WithFailedPlugin(pl.Name())
				return map[string]*framework.Status{pl.Name(): errStatus}
			}
			pluginStatus.SetFailedPlugin(pl.Name())
			statuses[pl.Name()] = pluginStatus
			if !f.runAllFilters {

				return statuses
			}
		}
	}

	return statuses
}

func (f *frameworkImpl) runFilterPlugin(ctx context.Context, pl framework.FilterPlugin, state *framework.CycleState, pod *v1.Pod, nodeInfo *framework.NodeInfo) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Filter(ctx, state, pod, nodeInfo)
	}
	startTime := time.Now()
	status := pl.Filter(ctx, state, pod, nodeInfo)
	f.metricsRecorder.observePluginDurationAsync(Filter, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunPostFilterPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, filteredNodeStatusMap framework.NodeToStatusMap) (_ *framework.PostFilterResult, status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(postFilter, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()

	statuses := make(framework.PluginToStatus)
	for _, pl := range f.postFilterPlugins {
		r, s := f.runPostFilterPlugin(ctx, pl, state, pod, filteredNodeStatusMap)
		if s.IsSuccess() {
			return r, s
		} else if !s.IsUnschedulable() {

			return nil, framework.AsStatus(s.AsError())
		}
		statuses[pl.Name()] = s
	}

	return nil, statuses.Merge()
}

func (f *frameworkImpl) runPostFilterPlugin(ctx context.Context, pl framework.PostFilterPlugin, state *framework.CycleState, pod *v1.Pod, filteredNodeStatusMap framework.NodeToStatusMap) (*framework.PostFilterResult, *framework.Status) {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PostFilter(ctx, state, pod, filteredNodeStatusMap)
	}
	startTime := time.Now()
	r, s := pl.PostFilter(ctx, state, pod, filteredNodeStatusMap)
	f.metricsRecorder.observePluginDurationAsync(postFilter, pl.Name(), s, metrics.SinceInSeconds(startTime))
	return r, s
}

func (f *frameworkImpl) RunFilterPluginsWithNominatedPods(ctx context.Context, state *framework.CycleState, pod *v1.Pod, info *framework.NodeInfo) *framework.Status {
	var status *framework.Status

	podsAdded := false

	for i := 0; i < 2; i++ {
		stateToUse := state
		nodeInfoToUse := info
		if i == 0 {
			var err error
			podsAdded, stateToUse, nodeInfoToUse, err = addNominatedPods(ctx, f, pod, state, info)
			if err != nil {
				return framework.AsStatus(err)
			}
		} else if !podsAdded || !status.IsSuccess() {
			break
		}

		statusMap := f.RunFilterPlugins(ctx, stateToUse, pod, nodeInfoToUse)
		status = statusMap.Merge()
		if !status.IsSuccess() && !status.IsUnschedulable() {
			return status
		}
	}

	return status
}

func addNominatedPods(ctx context.Context, fh framework.Handle, pod *v1.Pod, state *framework.CycleState, nodeInfo *framework.NodeInfo) (bool, *framework.CycleState, *framework.NodeInfo, error) {
	if fh == nil || nodeInfo.Node() == nil {

		return false, state, nodeInfo, nil
	}
	nominatedPodInfos := fh.NominatedPodsForNode(nodeInfo.Node().Name)
	if len(nominatedPodInfos) == 0 {
		return false, state, nodeInfo, nil
	}
	nodeInfoOut := nodeInfo.Clone()
	stateOut := state.Clone()
	podsAdded := false
	for _, pi := range nominatedPodInfos {
		if corev1.PodPriority(pi.Pod) >= corev1.PodPriority(pod) && pi.Pod.UID != pod.UID {
			nodeInfoOut.AddPodInfo(pi)
			status := fh.RunPreFilterExtensionAddPod(ctx, stateOut, pod, pi, nodeInfoOut)
			if !status.IsSuccess() {
				return false, state, nodeInfo, status.AsError()
			}
			podsAdded = true
		}
	}
	return podsAdded, stateOut, nodeInfoOut, nil
}

func (f *frameworkImpl) RunPreScorePlugins(
	ctx context.Context,
	state *framework.CycleState,
	pod *v1.Pod,
	nodes []*v1.Node,
) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(preScore, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.preScorePlugins {
		status = f.runPreScorePlugin(ctx, pl, state, pod, nodes)
		if !status.IsSuccess() {
			return framework.AsStatus(fmt.Errorf("running PreScore plugin %q: %w", pl.Name(), status.AsError()))
		}
	}

	return nil
}

func (f *frameworkImpl) runPreScorePlugin(ctx context.Context, pl framework.PreScorePlugin, state *framework.CycleState, pod *v1.Pod, nodes []*v1.Node) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreScore(ctx, state, pod, nodes)
	}
	startTime := time.Now()
	status := pl.PreScore(ctx, state, pod, nodes)
	f.metricsRecorder.observePluginDurationAsync(preScore, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunScorePlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodes []*v1.Node) (ps framework.PluginToNodeScores, status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(score, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	pluginToNodeScores := make(framework.PluginToNodeScores, len(f.scorePlugins))
	for _, pl := range f.scorePlugins {
		pluginToNodeScores[pl.Name()] = make(framework.NodeScoreList, len(nodes))
	}
	ctx, cancel := context.WithCancel(ctx)
	errCh := parallelize.NewErrorChannel()

	parallelize.Until(ctx, len(nodes), func(index int) {
		for _, pl := range f.scorePlugins {
			nodeName := nodes[index].Name
			s, status := f.runScorePlugin(ctx, pl, state, pod, nodeName)
			if !status.IsSuccess() {
				err := fmt.Errorf("plugin %q failed with: %w", pl.Name(), status.AsError())
				errCh.SendErrorWithCancel(err, cancel)
				return
			}
			pluginToNodeScores[pl.Name()][index] = framework.NodeScore{
				Name:  nodeName,
				Score: s,
			}
		}
	})
	if err := errCh.ReceiveError(); err != nil {
		return nil, framework.AsStatus(fmt.Errorf("running Score plugins: %w", err))
	}

	parallelize.Until(ctx, len(f.scorePlugins), func(index int) {
		pl := f.scorePlugins[index]
		nodeScoreList := pluginToNodeScores[pl.Name()]
		if pl.ScoreExtensions() == nil {
			return
		}
		status := f.runScoreExtension(ctx, pl, state, pod, nodeScoreList)
		if !status.IsSuccess() {
			err := fmt.Errorf("plugin %q failed with: %w", pl.Name(), status.AsError())
			errCh.SendErrorWithCancel(err, cancel)
			return
		}
	})
	if err := errCh.ReceiveError(); err != nil {
		return nil, framework.AsStatus(fmt.Errorf("running Normalize on Score plugins: %w", err))
	}

	parallelize.Until(ctx, len(f.scorePlugins), func(index int) {
		pl := f.scorePlugins[index]

		weight := f.pluginNameToWeightMap[pl.Name()]
		nodeScoreList := pluginToNodeScores[pl.Name()]

		for i, nodeScore := range nodeScoreList {

			if nodeScore.Score > framework.MaxNodeScore || nodeScore.Score < framework.MinNodeScore {
				err := fmt.Errorf("plugin %q returns an invalid score %v, it should in the range of [%v, %v] after normalizing", pl.Name(), nodeScore.Score, framework.MinNodeScore, framework.MaxNodeScore)
				errCh.SendErrorWithCancel(err, cancel)
				return
			}
			nodeScoreList[i].Score = nodeScore.Score * int64(weight)
		}
	})
	if err := errCh.ReceiveError(); err != nil {
		return nil, framework.AsStatus(fmt.Errorf("applying score defaultWeights on Score plugins: %w", err))
	}

	return pluginToNodeScores, nil
}

func (f *frameworkImpl) runScorePlugin(ctx context.Context, pl framework.ScorePlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) (int64, *framework.Status) {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Score(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	s, status := pl.Score(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(score, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return s, status
}

func (f *frameworkImpl) runScoreExtension(ctx context.Context, pl framework.ScorePlugin, state *framework.CycleState, pod *v1.Pod, nodeScoreList framework.NodeScoreList) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.ScoreExtensions().NormalizeScore(ctx, state, pod, nodeScoreList)
	}
	startTime := time.Now()
	status := pl.ScoreExtensions().NormalizeScore(ctx, state, pod, nodeScoreList)
	f.metricsRecorder.observePluginDurationAsync(scoreExtensionNormalize, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunPreBindPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(preBind, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.preBindPlugins {
		status = f.runPreBindPlugin(ctx, pl, state, pod, nodeName)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running PreBind plugin", "plugin", pl.Name(), "pod", klog.KObj(pod))
			return framework.AsStatus(fmt.Errorf("running PreBind plugin %q: %w", pl.Name(), err))
		}
	}
	return nil
}

func (f *frameworkImpl) runPreBindPlugin(ctx context.Context, pl framework.PreBindPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreBind(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status := pl.PreBind(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(preBind, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunBindPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(bind, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	if len(f.bindPlugins) == 0 {
		return framework.NewStatus(framework.Skip, "")
	}
	for _, bp := range f.bindPlugins {
		status = f.runBindPlugin(ctx, bp, state, pod, nodeName)
		if status != nil && status.Code() == framework.Skip {
			continue
		}
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running Bind plugin", "plugin", bp.Name(), "pod", klog.KObj(pod))
			return framework.AsStatus(fmt.Errorf("running Bind plugin %q: %w", bp.Name(), err))
		}
		return status
	}
	return status
}

func (f *frameworkImpl) runBindPlugin(ctx context.Context, bp framework.BindPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return bp.Bind(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status := bp.Bind(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(bind, bp.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunPostBindPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(postBind, framework.Success.String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.postBindPlugins {
		f.runPostBindPlugin(ctx, pl, state, pod, nodeName)
	}
}

func (f *frameworkImpl) runPostBindPlugin(ctx context.Context, pl framework.PostBindPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	if !state.ShouldRecordPluginMetrics() {
		pl.PostBind(ctx, state, pod, nodeName)
		return
	}
	startTime := time.Now()
	pl.PostBind(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(postBind, pl.Name(), nil, metrics.SinceInSeconds(startTime))
}

func (f *frameworkImpl) RunReservePluginsReserve(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(reserve, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.reservePlugins {
		status = f.runReservePluginReserve(ctx, pl, state, pod, nodeName)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running Reserve plugin", "plugin", pl.Name(), "pod", klog.KObj(pod))
			return framework.AsStatus(fmt.Errorf("running Reserve plugin %q: %w", pl.Name(), err))
		}
	}
	return nil
}

func (f *frameworkImpl) runReservePluginReserve(ctx context.Context, pl framework.ReservePlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Reserve(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status := pl.Reserve(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(reserve, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

func (f *frameworkImpl) RunReservePluginsUnreserve(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(unreserve, framework.Success.String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()

	for i := len(f.reservePlugins) - 1; i >= 0; i-- {
		f.runReservePluginUnreserve(ctx, f.reservePlugins[i], state, pod, nodeName)
	}
}

func (f *frameworkImpl) runReservePluginUnreserve(ctx context.Context, pl framework.ReservePlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	if !state.ShouldRecordPluginMetrics() {
		pl.Unreserve(ctx, state, pod, nodeName)
		return
	}
	startTime := time.Now()
	pl.Unreserve(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(unreserve, pl.Name(), nil, metrics.SinceInSeconds(startTime))
}

func (f *frameworkImpl) RunPermitPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(permit, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	pluginsWaitTime := make(map[string]time.Duration)
	statusCode := framework.Success
	for _, pl := range f.permitPlugins {
		status, timeout := f.runPermitPlugin(ctx, pl, state, pod, nodeName)
		if !status.IsSuccess() {
			if status.IsUnschedulable() {
				msg := fmt.Sprintf("rejected pod %q by permit plugin %q: %v", pod.Name, pl.Name(), status.Message())
				klog.V(4).Infof(msg)
				status.SetFailedPlugin(pl.Name())
				return status
			}
			if status.Code() == framework.Wait {

				if timeout > maxTimeout {
					timeout = maxTimeout
				}
				pluginsWaitTime[pl.Name()] = timeout
				statusCode = framework.Wait
			} else {
				err := status.AsError()
				klog.ErrorS(err, "Failed running Permit plugin", "plugin", pl.Name(), "pod", klog.KObj(pod))
				return framework.AsStatus(fmt.Errorf("running Permit plugin %q: %w", pl.Name(), err)).WithFailedPlugin(pl.Name())
			}
		}
	}
	if statusCode == framework.Wait {
		waitingPod := newWaitingPod(pod, pluginsWaitTime)
		f.waitingPods.add(waitingPod)
		msg := fmt.Sprintf("one or more plugins asked to wait and no plugin rejected pod %q", pod.Name)
		klog.V(4).Infof(msg)
		return framework.NewStatus(framework.Wait, msg)
	}
	return nil
}

func (f *frameworkImpl) runPermitPlugin(ctx context.Context, pl framework.PermitPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) (*framework.Status, time.Duration) {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Permit(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status, timeout := pl.Permit(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(permit, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status, timeout
}

func (f *frameworkImpl) WaitOnPermit(ctx context.Context, pod *v1.Pod) *framework.Status {
	waitingPod := f.waitingPods.get(pod.UID)
	if waitingPod == nil {
		return nil
	}
	defer f.waitingPods.remove(pod.UID)
	klog.V(4).Infof("pod %q waiting on permit", pod.Name)

	startTime := time.Now()
	s := <-waitingPod.s
	metrics.PermitWaitDuration.WithLabelValues(s.Code().String()).Observe(metrics.SinceInSeconds(startTime))

	if !s.IsSuccess() {
		if s.IsUnschedulable() {
			msg := fmt.Sprintf("pod %q rejected while waiting on permit: %v", pod.Name, s.Message())
			klog.V(4).Infof(msg)
			s.SetFailedPlugin(s.FailedPlugin())
			return s
		}
		err := s.AsError()
		klog.ErrorS(err, "Failed waiting on permit for pod", "pod", klog.KObj(pod))
		return framework.AsStatus(fmt.Errorf("waiting on permit for pod: %w", err)).WithFailedPlugin(s.FailedPlugin())
	}
	return nil
}

func (f *frameworkImpl) SnapshotSharedLister() framework.SharedLister {
	return f.snapshotSharedLister
}

func (f *frameworkImpl) IterateOverWaitingPods(callback func(framework.WaitingPod)) {
	f.waitingPods.iterate(callback)
}

func (f *frameworkImpl) GetWaitingPod(uid types.UID) framework.WaitingPod {
	if wp := f.waitingPods.get(uid); wp != nil {
		return wp
	}
	return nil 
}

func (f *frameworkImpl) RejectWaitingPod(uid types.UID) {
	waitingPod := f.waitingPods.get(uid)
	if waitingPod != nil {
		waitingPod.Reject("", "removed")
	}
}

func (f *frameworkImpl) HasFilterPlugins() bool {
	return len(f.filterPlugins) > 0
}

func (f *frameworkImpl) HasPostFilterPlugins() bool {
	return len(f.postFilterPlugins) > 0
}

func (f *frameworkImpl) HasScorePlugins() bool {
	return len(f.scorePlugins) > 0
}

func (f *frameworkImpl) ListPlugins() map[string][]config.Plugin {
	m := make(map[string][]config.Plugin)

	for _, e := range f.getExtensionPoints(&config.Plugins{}) {
		plugins := reflect.ValueOf(e.slicePtr).Elem()
		extName := plugins.Type().Elem().Name()
		var cfgs []config.Plugin
		for i := 0; i < plugins.Len(); i++ {
			name := plugins.Index(i).Interface().(framework.Plugin).Name()
			p := config.Plugin{Name: name}
			if extName == "ScorePlugin" {

				p.Weight = int32(f.pluginNameToWeightMap[name])
			}
			cfgs = append(cfgs, p)
		}
		if len(cfgs) > 0 {
			m[extName] = cfgs
		}
	}
	if len(m) > 0 {
		return m
	}
	return nil
}

func (f *frameworkImpl) ClientSet() clientset.Interface {
	return f.clientSet
}

func (f *frameworkImpl) EventRecorder() events.EventRecorder {
	return f.eventRecorder
}

func (f *frameworkImpl) SharedInformerFactory() informers.SharedInformerFactory {
	return f.informerFactory
}

func (f *frameworkImpl) pluginsNeeded(plugins *config.Plugins) map[string]config.Plugin {
	pgMap := make(map[string]config.Plugin)

	if plugins == nil {
		return pgMap
	}

	find := func(pgs config.PluginSet) {
		for _, pg := range pgs.Enabled {
			pgMap[pg.Name] = pg
		}
	}
	for _, e := range f.getExtensionPoints(plugins) {
		find(e.plugins)
	}
	return pgMap
}

func (f *frameworkImpl) ProfileName() string {
	return f.profileName
}
/*
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 runtime

import (
	"context"
	"fmt"
	"reflect"
	"sort"
	"time"

	v1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/sets"
	"k8s.io/client-go/informers"
	clientset "k8s.io/client-go/kubernetes"
	"k8s.io/client-go/tools/events"
	"k8s.io/component-helpers/scheduling/corev1"
	"k8s.io/klog/v2"
	"k8s.io/kube-scheduler/config/v1beta1"
	"k8s.io/kubernetes/pkg/scheduler/apis/config"
	"k8s.io/kubernetes/pkg/scheduler/apis/config/scheme"
	"k8s.io/kubernetes/pkg/scheduler/framework"
	"k8s.io/kubernetes/pkg/scheduler/internal/parallelize"
	"k8s.io/kubernetes/pkg/scheduler/metrics"
)

const (
	// Filter is the name of the filter extension point.
	Filter = "Filter"
	// Specifies the maximum timeout a permit plugin can return.
	maxTimeout                  = 15 * time.Minute
	preFilter                   = "PreFilter"
	preFilterExtensionAddPod    = "PreFilterExtensionAddPod"
	preFilterExtensionRemovePod = "PreFilterExtensionRemovePod"
	postFilter                  = "PostFilter"
	preScore                    = "PreScore"
	score                       = "Score"
	scoreExtensionNormalize     = "ScoreExtensionNormalize"
	preBind                     = "PreBind"
	bind                        = "Bind"
	postBind                    = "PostBind"
	reserve                     = "Reserve"
	unreserve                   = "Unreserve"
	permit                      = "Permit"
)

var allClusterEvents = []framework.ClusterEvent{
	{Resource: framework.Pod, ActionType: framework.All},
	{Resource: framework.Node, ActionType: framework.All},
	{Resource: framework.CSINode, ActionType: framework.All},
	{Resource: framework.PersistentVolume, ActionType: framework.All},
	{Resource: framework.PersistentVolumeClaim, ActionType: framework.All},
	{Resource: framework.Service, ActionType: framework.All},
	{Resource: framework.StorageClass, ActionType: framework.All},
}

var configDecoder = scheme.Codecs.UniversalDecoder()

// frameworkImpl is the component responsible for initializing and running scheduler
// plugins.
type frameworkImpl struct {
	registry              Registry
	snapshotSharedLister  framework.SharedLister
	waitingPods           *waitingPodsMap
	pluginNameToWeightMap map[string]int
	queueSortPlugins      []framework.QueueSortPlugin
	preFilterPlugins      []framework.PreFilterPlugin
	filterPlugins         []framework.FilterPlugin
	postFilterPlugins     []framework.PostFilterPlugin
	preScorePlugins       []framework.PreScorePlugin
	scorePlugins          []framework.ScorePlugin
	reservePlugins        []framework.ReservePlugin
	preBindPlugins        []framework.PreBindPlugin
	bindPlugins           []framework.BindPlugin
	postBindPlugins       []framework.PostBindPlugin
	permitPlugins         []framework.PermitPlugin

	clientSet       clientset.Interface
	eventRecorder   events.EventRecorder
	informerFactory informers.SharedInformerFactory

	metricsRecorder *metricsRecorder
	profileName     string

	extenders []framework.Extender
	framework.PodNominator

	// Indicates that RunFilterPlugins should accumulate all failed statuses and not return
	// after the first failure.
	runAllFilters bool
}

// extensionPoint encapsulates desired and applied set of plugins at a specific extension
// point. This is used to simplify iterating over all extension points supported by the
// frameworkImpl.
type extensionPoint struct {
	// the set of plugins to be configured at this extension point.
	plugins config.PluginSet
	// a pointer to the slice storing plugins implementations that will run at this
	// extension point.
	slicePtr interface{}
}

func (f *frameworkImpl) getExtensionPoints(plugins *config.Plugins) []extensionPoint {
	return []extensionPoint{
		{plugins.PreFilter, &f.preFilterPlugins},
		{plugins.Filter, &f.filterPlugins},
		{plugins.PostFilter, &f.postFilterPlugins},
		{plugins.Reserve, &f.reservePlugins},
		{plugins.PreScore, &f.preScorePlugins},
		{plugins.Score, &f.scorePlugins},
		{plugins.PreBind, &f.preBindPlugins},
		{plugins.Bind, &f.bindPlugins},
		{plugins.PostBind, &f.postBindPlugins},
		{plugins.Permit, &f.permitPlugins},
		{plugins.QueueSort, &f.queueSortPlugins},
	}
}

// Extenders returns the registered extenders.
func (f *frameworkImpl) Extenders() []framework.Extender {
	return f.extenders
}

type frameworkOptions struct {
	clientSet            clientset.Interface
	eventRecorder        events.EventRecorder
	informerFactory      informers.SharedInformerFactory
	snapshotSharedLister framework.SharedLister
	metricsRecorder      *metricsRecorder
	profileName          string
	podNominator         framework.PodNominator
	extenders            []framework.Extender
	runAllFilters        bool
	captureProfile       CaptureProfile
	clusterEventMap      map[framework.ClusterEvent]sets.String
}

// Option for the frameworkImpl.
type Option func(*frameworkOptions)

// WithClientSet sets clientSet for the scheduling frameworkImpl.
func WithClientSet(clientSet clientset.Interface) Option {
	return func(o *frameworkOptions) {
		o.clientSet = clientSet
	}
}

// WithEventRecorder sets clientSet for the scheduling frameworkImpl.
func WithEventRecorder(recorder events.EventRecorder) Option {
	return func(o *frameworkOptions) {
		o.eventRecorder = recorder
	}
}

// WithInformerFactory sets informer factory for the scheduling frameworkImpl.
func WithInformerFactory(informerFactory informers.SharedInformerFactory) Option {
	return func(o *frameworkOptions) {
		o.informerFactory = informerFactory
	}
}

// WithSnapshotSharedLister sets the SharedLister of the snapshot.
func WithSnapshotSharedLister(snapshotSharedLister framework.SharedLister) Option {
	return func(o *frameworkOptions) {
		o.snapshotSharedLister = snapshotSharedLister
	}
}

// WithRunAllFilters sets the runAllFilters flag, which means RunFilterPlugins accumulates
// all failure Statuses.
func WithRunAllFilters(runAllFilters bool) Option {
	return func(o *frameworkOptions) {
		o.runAllFilters = runAllFilters
	}
}

// WithProfileName sets the profile name.
func WithProfileName(name string) Option {
	return func(o *frameworkOptions) {
		o.profileName = name
	}
}

// withMetricsRecorder is only used in tests.
func withMetricsRecorder(recorder *metricsRecorder) Option {
	return func(o *frameworkOptions) {
		o.metricsRecorder = recorder
	}
}

// WithPodNominator sets podNominator for the scheduling frameworkImpl.
func WithPodNominator(nominator framework.PodNominator) Option {
	return func(o *frameworkOptions) {
		o.podNominator = nominator
	}
}

// WithExtenders sets extenders for the scheduling frameworkImpl.
func WithExtenders(extenders []framework.Extender) Option {
	return func(o *frameworkOptions) {
		o.extenders = extenders
	}
}

// CaptureProfile is a callback to capture a finalized profile.
type CaptureProfile func(config.KubeSchedulerProfile)

// WithCaptureProfile sets a callback to capture the finalized profile.
func WithCaptureProfile(c CaptureProfile) Option {
	return func(o *frameworkOptions) {
		o.captureProfile = c
	}
}

func defaultFrameworkOptions() frameworkOptions {
	return frameworkOptions{
		metricsRecorder: newMetricsRecorder(1000, time.Second),
		clusterEventMap: make(map[framework.ClusterEvent]sets.String),
	}
}

// WithClusterEventMap sets clusterEventMap for the scheduling frameworkImpl.
func WithClusterEventMap(m map[framework.ClusterEvent]sets.String) Option {
	return func(o *frameworkOptions) {
		o.clusterEventMap = m
	}
}

var _ framework.Framework = &frameworkImpl{}

// NewFramework initializes plugins given the configuration and the registry.
func NewFramework(r Registry, plugins *config.Plugins, args []config.PluginConfig, opts ...Option) (framework.Framework, error) {
	options := defaultFrameworkOptions()
	for _, opt := range opts {
		opt(&options)
	}

	f := &frameworkImpl{
		registry:              r,
		snapshotSharedLister:  options.snapshotSharedLister,
		pluginNameToWeightMap: make(map[string]int),
		waitingPods:           newWaitingPodsMap(),
		clientSet:             options.clientSet,
		eventRecorder:         options.eventRecorder,
		informerFactory:       options.informerFactory,
		metricsRecorder:       options.metricsRecorder,
		profileName:           options.profileName,
		runAllFilters:         options.runAllFilters,
		extenders:             options.extenders,
		PodNominator:          options.podNominator,
	}
	if plugins == nil {
		return f, nil
	}

	// get needed plugins from config
	pg := f.pluginsNeeded(plugins)

	pluginConfig := make(map[string]runtime.Object, len(args))
	for i := range args {
		name := args[i].Name
		if _, ok := pluginConfig[name]; ok {
			return nil, fmt.Errorf("repeated config for plugin %s", name)
		}
		pluginConfig[name] = args[i].Args
	}
	outputProfile := config.KubeSchedulerProfile{
		SchedulerName: f.profileName,
		Plugins:       plugins,
		PluginConfig:  make([]config.PluginConfig, 0, len(pg)),
	}

	pluginsMap := make(map[string]framework.Plugin)
	var totalPriority int64
	for name, factory := range r {
		// initialize only needed plugins.
		if _, ok := pg[name]; !ok {
			continue
		}

		args, err := getPluginArgsOrDefault(pluginConfig, name)
		if err != nil {
			return nil, fmt.Errorf("getting args for Plugin %q: %w", name, err)
		}
		if args != nil {
			outputProfile.PluginConfig = append(outputProfile.PluginConfig, config.PluginConfig{
				Name: name,
				Args: args,
			})
		}
		p, err := factory(args, f)
		if err != nil {
			return nil, fmt.Errorf("initializing plugin %q: %w", name, err)
		}
		pluginsMap[name] = p

		// Update ClusterEventMap in place.
		fillEventToPluginMap(p, options.clusterEventMap)

		// a weight of zero is not permitted, plugins can be disabled explicitly
		// when configured.
		f.pluginNameToWeightMap[name] = int(pg[name].Weight)
		if f.pluginNameToWeightMap[name] == 0 {
			f.pluginNameToWeightMap[name] = 1
		}
		// Checks totalPriority against MaxTotalScore to avoid overflow
		if int64(f.pluginNameToWeightMap[name])*framework.MaxNodeScore > framework.MaxTotalScore-totalPriority {
			return nil, fmt.Errorf("total score of Score plugins could overflow")
		}
		totalPriority += int64(f.pluginNameToWeightMap[name]) * framework.MaxNodeScore
	}

	for _, e := range f.getExtensionPoints(plugins) {
		if err := updatePluginList(e.slicePtr, e.plugins, pluginsMap); err != nil {
			return nil, err
		}
	}

	// Verifying the score weights again since Plugin.Name() could return a different
	// value from the one used in the configuration.
	for _, scorePlugin := range f.scorePlugins {
		if f.pluginNameToWeightMap[scorePlugin.Name()] == 0 {
			return nil, fmt.Errorf("score plugin %q is not configured with weight", scorePlugin.Name())
		}
	}

	if len(f.queueSortPlugins) == 0 {
		return nil, fmt.Errorf("no queue sort plugin is enabled")
	}
	if len(f.queueSortPlugins) > 1 {
		return nil, fmt.Errorf("only one queue sort plugin can be enabled")
	}
	if len(f.bindPlugins) == 0 {
		return nil, fmt.Errorf("at least one bind plugin is needed")
	}

	if options.captureProfile != nil {
		if len(outputProfile.PluginConfig) != 0 {
			sort.Slice(outputProfile.PluginConfig, func(i, j int) bool {
				return outputProfile.PluginConfig[i].Name < outputProfile.PluginConfig[j].Name
			})
		} else {
			outputProfile.PluginConfig = nil
		}
		options.captureProfile(outputProfile)
	}

	return f, nil
}

func fillEventToPluginMap(p framework.Plugin, eventToPlugins map[framework.ClusterEvent]sets.String) {
	ext, ok := p.(framework.EnqueueExtensions)
	if !ok {
		// If interface EnqueueExtensions is not implemented, register the default events
		// to the plugin. This is to ensure backward compatibility.
		registerClusterEvents(p.Name(), eventToPlugins, allClusterEvents)
		return
	}

	events := ext.EventsToRegister()
	// It's rare that a plugin implements EnqueueExtensions but returns nil.
	// We treat it as: the plugin is not interested in any event, and hence pod failed by that plugin
	// cannot be moved by any regular cluster event.
	if len(events) == 0 {
		klog.InfoS("Plugin's EventsToRegister() returned nil", "plugin", p.Name())
		return
	}
	// The most common case: a plugin implements EnqueueExtensions and returns non-nil result.
	registerClusterEvents(p.Name(), eventToPlugins, events)
}

func registerClusterEvents(name string, eventToPlugins map[framework.ClusterEvent]sets.String, evts []framework.ClusterEvent) {
	for _, evt := range evts {
		if eventToPlugins[evt] == nil {
			eventToPlugins[evt] = sets.NewString(name)
		} else {
			eventToPlugins[evt].Insert(name)
		}
	}
}

// getPluginArgsOrDefault returns a configuration provided by the user or builds
// a default from the scheme. Returns `nil, nil` if the plugin does not have a
// defined arg types, such as in-tree plugins that don't require configuration
// or out-of-tree plugins.
func getPluginArgsOrDefault(pluginConfig map[string]runtime.Object, name string) (runtime.Object, error) {
	res, ok := pluginConfig[name]
	if ok {
		return res, nil
	}
	// Use defaults from latest config API version.
	gvk := v1beta1.SchemeGroupVersion.WithKind(name + "Args")
	obj, _, err := configDecoder.Decode(nil, &gvk, nil)
	if runtime.IsNotRegisteredError(err) {
		// This plugin is out-of-tree or doesn't require configuration.
		return nil, nil
	}
	return obj, err
}

func updatePluginList(pluginList interface{}, pluginSet config.PluginSet, pluginsMap map[string]framework.Plugin) error {
	plugins := reflect.ValueOf(pluginList).Elem()
	pluginType := plugins.Type().Elem()
	set := sets.NewString()
	for _, ep := range pluginSet.Enabled {
		pg, ok := pluginsMap[ep.Name]
		if !ok {
			return fmt.Errorf("%s %q does not exist", pluginType.Name(), ep.Name)
		}

		if !reflect.TypeOf(pg).Implements(pluginType) {
			return fmt.Errorf("plugin %q does not extend %s plugin", ep.Name, pluginType.Name())
		}

		if set.Has(ep.Name) {
			return fmt.Errorf("plugin %q already registered as %q", ep.Name, pluginType.Name())
		}

		set.Insert(ep.Name)

		newPlugins := reflect.Append(plugins, reflect.ValueOf(pg))
		plugins.Set(newPlugins)
	}
	return nil
}

// QueueSortFunc returns the function to sort pods in scheduling queue
func (f *frameworkImpl) QueueSortFunc() framework.LessFunc {
	if f == nil {
		// If frameworkImpl is nil, simply keep their order unchanged.
		// NOTE: this is primarily for tests.
		return func(_, _ *framework.QueuedPodInfo) bool { return false }
	}

	if len(f.queueSortPlugins) == 0 {
		panic("No QueueSort plugin is registered in the frameworkImpl.")
	}

	// Only one QueueSort plugin can be enabled.
	return f.queueSortPlugins[0].Less
}

// RunPreFilterPlugins runs the set of configured PreFilter plugins. It returns
// *Status and its code is set to non-success if any of the plugins returns
// anything but Success. If a non-success status is returned, then the scheduling
// cycle is aborted.
func (f *frameworkImpl) RunPreFilterPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(preFilter, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.preFilterPlugins {
		status = f.runPreFilterPlugin(ctx, pl, state, pod)
		if !status.IsSuccess() {
			status.SetFailedPlugin(pl.Name())
			if status.IsUnschedulable() {
				return status
			}
			return framework.AsStatus(fmt.Errorf("running PreFilter plugin %q: %w", pl.Name(), status.AsError())).WithFailedPlugin(pl.Name())
		}
	}

	return nil
}

func (f *frameworkImpl) runPreFilterPlugin(ctx context.Context, pl framework.PreFilterPlugin, state *framework.CycleState, pod *v1.Pod) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreFilter(ctx, state, pod)
	}
	startTime := time.Now()
	status := pl.PreFilter(ctx, state, pod)
	f.metricsRecorder.observePluginDurationAsync(preFilter, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunPreFilterExtensionAddPod calls the AddPod interface for the set of configured
// PreFilter plugins. It returns directly if any of the plugins return any
// status other than Success.
func (f *frameworkImpl) RunPreFilterExtensionAddPod(
	ctx context.Context,
	state *framework.CycleState,
	podToSchedule *v1.Pod,
	podInfoToAdd *framework.PodInfo,
	nodeInfo *framework.NodeInfo,
) (status *framework.Status) {
	for _, pl := range f.preFilterPlugins {
		if pl.PreFilterExtensions() == nil {
			continue
		}
		status = f.runPreFilterExtensionAddPod(ctx, pl, state, podToSchedule, podInfoToAdd, nodeInfo)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running AddPod on PreFilter plugin", "plugin", pl.Name(), "pod", klog.KObj(podToSchedule))
			return framework.AsStatus(fmt.Errorf("running AddPod on PreFilter plugin %q: %w", pl.Name(), err))
		}
	}

	return nil
}

func (f *frameworkImpl) runPreFilterExtensionAddPod(ctx context.Context, pl framework.PreFilterPlugin, state *framework.CycleState, podToSchedule *v1.Pod, podInfoToAdd *framework.PodInfo, nodeInfo *framework.NodeInfo) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreFilterExtensions().AddPod(ctx, state, podToSchedule, podInfoToAdd, nodeInfo)
	}
	startTime := time.Now()
	status := pl.PreFilterExtensions().AddPod(ctx, state, podToSchedule, podInfoToAdd, nodeInfo)
	f.metricsRecorder.observePluginDurationAsync(preFilterExtensionAddPod, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunPreFilterExtensionRemovePod calls the RemovePod interface for the set of configured
// PreFilter plugins. It returns directly if any of the plugins return any
// status other than Success.
func (f *frameworkImpl) RunPreFilterExtensionRemovePod(
	ctx context.Context,
	state *framework.CycleState,
	podToSchedule *v1.Pod,
	podInfoToRemove *framework.PodInfo,
	nodeInfo *framework.NodeInfo,
) (status *framework.Status) {
	for _, pl := range f.preFilterPlugins {
		if pl.PreFilterExtensions() == nil {
			continue
		}
		status = f.runPreFilterExtensionRemovePod(ctx, pl, state, podToSchedule, podInfoToRemove, nodeInfo)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running RemovePod on PreFilter plugin", "plugin", pl.Name(), "pod", klog.KObj(podToSchedule))
			return framework.AsStatus(fmt.Errorf("running RemovePod on PreFilter plugin %q: %w", pl.Name(), err))
		}
	}

	return nil
}

func (f *frameworkImpl) runPreFilterExtensionRemovePod(ctx context.Context, pl framework.PreFilterPlugin, state *framework.CycleState, podToSchedule *v1.Pod, podInfoToRemove *framework.PodInfo, nodeInfo *framework.NodeInfo) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreFilterExtensions().RemovePod(ctx, state, podToSchedule, podInfoToRemove, nodeInfo)
	}
	startTime := time.Now()
	status := pl.PreFilterExtensions().RemovePod(ctx, state, podToSchedule, podInfoToRemove, nodeInfo)
	f.metricsRecorder.observePluginDurationAsync(preFilterExtensionRemovePod, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunFilterPlugins runs the set of configured Filter plugins for pod on
// the given node. If any of these plugins doesn't return "Success", the
// given node is not suitable for running pod.
// Meanwhile, the failure message and status are set for the given node.
func (f *frameworkImpl) RunFilterPlugins(
	ctx context.Context,
	state *framework.CycleState,
	pod *v1.Pod,
	nodeInfo *framework.NodeInfo,
) framework.PluginToStatus {
	statuses := make(framework.PluginToStatus)
	for _, pl := range f.filterPlugins {
		pluginStatus := f.runFilterPlugin(ctx, pl, state, pod, nodeInfo)
		if !pluginStatus.IsSuccess() {
			if !pluginStatus.IsUnschedulable() {
				// Filter plugins are not supposed to return any status other than
				// Success or Unschedulable.
				errStatus := framework.AsStatus(fmt.Errorf("running %q filter plugin: %w", pl.Name(), pluginStatus.AsError())).WithFailedPlugin(pl.Name())
				return map[string]*framework.Status{pl.Name(): errStatus}
			}
			pluginStatus.SetFailedPlugin(pl.Name())
			statuses[pl.Name()] = pluginStatus
			if !f.runAllFilters {
				// Exit early if we don't need to run all filters.
				return statuses
			}
		}
	}

	return statuses
}

func (f *frameworkImpl) runFilterPlugin(ctx context.Context, pl framework.FilterPlugin, state *framework.CycleState, pod *v1.Pod, nodeInfo *framework.NodeInfo) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Filter(ctx, state, pod, nodeInfo)
	}
	startTime := time.Now()
	status := pl.Filter(ctx, state, pod, nodeInfo)
	f.metricsRecorder.observePluginDurationAsync(Filter, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunPostFilterPlugins runs the set of configured PostFilter plugins until the first
// Success or Error is met, otherwise continues to execute all plugins.
func (f *frameworkImpl) RunPostFilterPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, filteredNodeStatusMap framework.NodeToStatusMap) (_ *framework.PostFilterResult, status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(postFilter, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()

	statuses := make(framework.PluginToStatus)
	for _, pl := range f.postFilterPlugins {
		r, s := f.runPostFilterPlugin(ctx, pl, state, pod, filteredNodeStatusMap)
		if s.IsSuccess() {
			return r, s
		} else if !s.IsUnschedulable() {
			// Any status other than Success or Unschedulable is Error.
			return nil, framework.AsStatus(s.AsError())
		}
		statuses[pl.Name()] = s
	}

	return nil, statuses.Merge()
}

func (f *frameworkImpl) runPostFilterPlugin(ctx context.Context, pl framework.PostFilterPlugin, state *framework.CycleState, pod *v1.Pod, filteredNodeStatusMap framework.NodeToStatusMap) (*framework.PostFilterResult, *framework.Status) {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PostFilter(ctx, state, pod, filteredNodeStatusMap)
	}
	startTime := time.Now()
	r, s := pl.PostFilter(ctx, state, pod, filteredNodeStatusMap)
	f.metricsRecorder.observePluginDurationAsync(postFilter, pl.Name(), s, metrics.SinceInSeconds(startTime))
	return r, s
}

// RunFilterPluginsWithNominatedPods runs the set of configured filter plugins
// for nominated pod on the given node.
// This function is called from two different places: Schedule and Preempt.
// When it is called from Schedule, we want to test whether the pod is
// schedulable on the node with all the existing pods on the node plus higher
// and equal priority pods nominated to run on the node.
// When it is called from Preempt, we should remove the victims of preemption
// and add the nominated pods. Removal of the victims is done by
// SelectVictimsOnNode(). Preempt removes victims from PreFilter state and
// NodeInfo before calling this function.
func (f *frameworkImpl) RunFilterPluginsWithNominatedPods(ctx context.Context, state *framework.CycleState, pod *v1.Pod, info *framework.NodeInfo) *framework.Status {
	var status *framework.Status

	podsAdded := false
	// We run filters twice in some cases. If the node has greater or equal priority
	// nominated pods, we run them when those pods are added to PreFilter state and nodeInfo.
	// If all filters succeed in this pass, we run them again when these
	// nominated pods are not added. This second pass is necessary because some
	// filters such as inter-pod affinity may not pass without the nominated pods.
	// If there are no nominated pods for the node or if the first run of the
	// filters fail, we don't run the second pass.
	// We consider only equal or higher priority pods in the first pass, because
	// those are the current "pod" must yield to them and not take a space opened
	// for running them. It is ok if the current "pod" take resources freed for
	// lower priority pods.
	// Requiring that the new pod is schedulable in both circumstances ensures that
	// we are making a conservative decision: filters like resources and inter-pod
	// anti-affinity are more likely to fail when the nominated pods are treated
	// as running, while filters like pod affinity are more likely to fail when
	// the nominated pods are treated as not running. We can't just assume the
	// nominated pods are running because they are not running right now and in fact,
	// they may end up getting scheduled to a different node.
	for i := 0; i < 2; i++ {
		stateToUse := state
		nodeInfoToUse := info
		if i == 0 {
			var err error
			podsAdded, stateToUse, nodeInfoToUse, err = addNominatedPods(ctx, f, pod, state, info)
			if err != nil {
				return framework.AsStatus(err)
			}
		} else if !podsAdded || !status.IsSuccess() {
			break
		}

		statusMap := f.RunFilterPlugins(ctx, stateToUse, pod, nodeInfoToUse)
		status = statusMap.Merge()
		if !status.IsSuccess() && !status.IsUnschedulable() {
			return status
		}
	}

	return status
}

// addNominatedPods adds pods with equal or greater priority which are nominated
// to run on the node. It returns 1) whether any pod was added, 2) augmented cycleState,
// 3) augmented nodeInfo.
func addNominatedPods(ctx context.Context, fh framework.Handle, pod *v1.Pod, state *framework.CycleState, nodeInfo *framework.NodeInfo) (bool, *framework.CycleState, *framework.NodeInfo, error) {
	if fh == nil || nodeInfo.Node() == nil {
		// This may happen only in tests.
		return false, state, nodeInfo, nil
	}
	nominatedPodInfos := fh.NominatedPodsForNode(nodeInfo.Node().Name)
	if len(nominatedPodInfos) == 0 {
		return false, state, nodeInfo, nil
	}
	nodeInfoOut := nodeInfo.Clone()
	stateOut := state.Clone()
	podsAdded := false
	for _, pi := range nominatedPodInfos {
		if corev1.PodPriority(pi.Pod) >= corev1.PodPriority(pod) && pi.Pod.UID != pod.UID {
			nodeInfoOut.AddPodInfo(pi)
			status := fh.RunPreFilterExtensionAddPod(ctx, stateOut, pod, pi, nodeInfoOut)
			if !status.IsSuccess() {
				return false, state, nodeInfo, status.AsError()
			}
			podsAdded = true
		}
	}
	return podsAdded, stateOut, nodeInfoOut, nil
}

// RunPreScorePlugins runs the set of configured pre-score plugins. If any
// of these plugins returns any status other than "Success", the given pod is rejected.
func (f *frameworkImpl) RunPreScorePlugins(
	ctx context.Context,
	state *framework.CycleState,
	pod *v1.Pod,
	nodes []*v1.Node,
) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(preScore, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.preScorePlugins {
		status = f.runPreScorePlugin(ctx, pl, state, pod, nodes)
		if !status.IsSuccess() {
			return framework.AsStatus(fmt.Errorf("running PreScore plugin %q: %w", pl.Name(), status.AsError()))
		}
	}

	return nil
}

func (f *frameworkImpl) runPreScorePlugin(ctx context.Context, pl framework.PreScorePlugin, state *framework.CycleState, pod *v1.Pod, nodes []*v1.Node) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreScore(ctx, state, pod, nodes)
	}
	startTime := time.Now()
	status := pl.PreScore(ctx, state, pod, nodes)
	f.metricsRecorder.observePluginDurationAsync(preScore, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunScorePlugins runs the set of configured scoring plugins. It returns a list that
// stores for each scoring plugin name the corresponding NodeScoreList(s).
// It also returns *Status, which is set to non-success if any of the plugins returns
// a non-success status.
func (f *frameworkImpl) RunScorePlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodes []*v1.Node) (ps framework.PluginToNodeScores, status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(score, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	pluginToNodeScores := make(framework.PluginToNodeScores, len(f.scorePlugins))
	for _, pl := range f.scorePlugins {
		pluginToNodeScores[pl.Name()] = make(framework.NodeScoreList, len(nodes))
	}
	ctx, cancel := context.WithCancel(ctx)
	errCh := parallelize.NewErrorChannel()

	// Run Score method for each node in parallel.
	parallelize.Until(ctx, len(nodes), func(index int) {
		for _, pl := range f.scorePlugins {
			nodeName := nodes[index].Name
			s, status := f.runScorePlugin(ctx, pl, state, pod, nodeName)
			if !status.IsSuccess() {
				err := fmt.Errorf("plugin %q failed with: %w", pl.Name(), status.AsError())
				errCh.SendErrorWithCancel(err, cancel)
				return
			}
			pluginToNodeScores[pl.Name()][index] = framework.NodeScore{
				Name:  nodeName,
				Score: s,
			}
		}
	})
	if err := errCh.ReceiveError(); err != nil {
		return nil, framework.AsStatus(fmt.Errorf("running Score plugins: %w", err))
	}

	// Run NormalizeScore method for each ScorePlugin in parallel.
	parallelize.Until(ctx, len(f.scorePlugins), func(index int) {
		pl := f.scorePlugins[index]
		nodeScoreList := pluginToNodeScores[pl.Name()]
		if pl.ScoreExtensions() == nil {
			return
		}
		status := f.runScoreExtension(ctx, pl, state, pod, nodeScoreList)
		if !status.IsSuccess() {
			err := fmt.Errorf("plugin %q failed with: %w", pl.Name(), status.AsError())
			errCh.SendErrorWithCancel(err, cancel)
			return
		}
	})
	if err := errCh.ReceiveError(); err != nil {
		return nil, framework.AsStatus(fmt.Errorf("running Normalize on Score plugins: %w", err))
	}

	// Apply score defaultWeights for each ScorePlugin in parallel.
	parallelize.Until(ctx, len(f.scorePlugins), func(index int) {
		pl := f.scorePlugins[index]
		// Score plugins' weight has been checked when they are initialized.
		weight := f.pluginNameToWeightMap[pl.Name()]
		nodeScoreList := pluginToNodeScores[pl.Name()]

		for i, nodeScore := range nodeScoreList {
			// return error if score plugin returns invalid score.
			if nodeScore.Score > framework.MaxNodeScore || nodeScore.Score < framework.MinNodeScore {
				err := fmt.Errorf("plugin %q returns an invalid score %v, it should in the range of [%v, %v] after normalizing", pl.Name(), nodeScore.Score, framework.MinNodeScore, framework.MaxNodeScore)
				errCh.SendErrorWithCancel(err, cancel)
				return
			}
			nodeScoreList[i].Score = nodeScore.Score * int64(weight)
		}
	})
	if err := errCh.ReceiveError(); err != nil {
		return nil, framework.AsStatus(fmt.Errorf("applying score defaultWeights on Score plugins: %w", err))
	}

	return pluginToNodeScores, nil
}

func (f *frameworkImpl) runScorePlugin(ctx context.Context, pl framework.ScorePlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) (int64, *framework.Status) {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Score(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	s, status := pl.Score(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(score, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return s, status
}

func (f *frameworkImpl) runScoreExtension(ctx context.Context, pl framework.ScorePlugin, state *framework.CycleState, pod *v1.Pod, nodeScoreList framework.NodeScoreList) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.ScoreExtensions().NormalizeScore(ctx, state, pod, nodeScoreList)
	}
	startTime := time.Now()
	status := pl.ScoreExtensions().NormalizeScore(ctx, state, pod, nodeScoreList)
	f.metricsRecorder.observePluginDurationAsync(scoreExtensionNormalize, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunPreBindPlugins runs the set of configured prebind plugins. It returns a
// failure (bool) if any of the plugins returns an error. It also returns an
// error containing the rejection message or the error occurred in the plugin.
func (f *frameworkImpl) RunPreBindPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(preBind, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.preBindPlugins {
		status = f.runPreBindPlugin(ctx, pl, state, pod, nodeName)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running PreBind plugin", "plugin", pl.Name(), "pod", klog.KObj(pod))
			return framework.AsStatus(fmt.Errorf("running PreBind plugin %q: %w", pl.Name(), err))
		}
	}
	return nil
}

func (f *frameworkImpl) runPreBindPlugin(ctx context.Context, pl framework.PreBindPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.PreBind(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status := pl.PreBind(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(preBind, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunBindPlugins runs the set of configured bind plugins until one returns a non `Skip` status.
func (f *frameworkImpl) RunBindPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(bind, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	if len(f.bindPlugins) == 0 {
		return framework.NewStatus(framework.Skip, "")
	}
	for _, bp := range f.bindPlugins {
		status = f.runBindPlugin(ctx, bp, state, pod, nodeName)
		if status != nil && status.Code() == framework.Skip {
			continue
		}
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running Bind plugin", "plugin", bp.Name(), "pod", klog.KObj(pod))
			return framework.AsStatus(fmt.Errorf("running Bind plugin %q: %w", bp.Name(), err))
		}
		return status
	}
	return status
}

func (f *frameworkImpl) runBindPlugin(ctx context.Context, bp framework.BindPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return bp.Bind(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status := bp.Bind(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(bind, bp.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunPostBindPlugins runs the set of configured postbind plugins.
func (f *frameworkImpl) RunPostBindPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(postBind, framework.Success.String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.postBindPlugins {
		f.runPostBindPlugin(ctx, pl, state, pod, nodeName)
	}
}

func (f *frameworkImpl) runPostBindPlugin(ctx context.Context, pl framework.PostBindPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	if !state.ShouldRecordPluginMetrics() {
		pl.PostBind(ctx, state, pod, nodeName)
		return
	}
	startTime := time.Now()
	pl.PostBind(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(postBind, pl.Name(), nil, metrics.SinceInSeconds(startTime))
}

// RunReservePluginsReserve runs the Reserve method in the set of configured
// reserve plugins. If any of these plugins returns an error, it does not
// continue running the remaining ones and returns the error. In such a case,
// the pod will not be scheduled and the caller will be expected to call
// RunReservePluginsUnreserve.
func (f *frameworkImpl) RunReservePluginsReserve(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(reserve, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	for _, pl := range f.reservePlugins {
		status = f.runReservePluginReserve(ctx, pl, state, pod, nodeName)
		if !status.IsSuccess() {
			err := status.AsError()
			klog.ErrorS(err, "Failed running Reserve plugin", "plugin", pl.Name(), "pod", klog.KObj(pod))
			return framework.AsStatus(fmt.Errorf("running Reserve plugin %q: %w", pl.Name(), err))
		}
	}
	return nil
}

func (f *frameworkImpl) runReservePluginReserve(ctx context.Context, pl framework.ReservePlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) *framework.Status {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Reserve(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status := pl.Reserve(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(reserve, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status
}

// RunReservePluginsUnreserve runs the Unreserve method in the set of
// configured reserve plugins.
func (f *frameworkImpl) RunReservePluginsUnreserve(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(unreserve, framework.Success.String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	// Execute the Unreserve operation of each reserve plugin in the
	// *reverse* order in which the Reserve operation was executed.
	for i := len(f.reservePlugins) - 1; i >= 0; i-- {
		f.runReservePluginUnreserve(ctx, f.reservePlugins[i], state, pod, nodeName)
	}
}

func (f *frameworkImpl) runReservePluginUnreserve(ctx context.Context, pl framework.ReservePlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) {
	if !state.ShouldRecordPluginMetrics() {
		pl.Unreserve(ctx, state, pod, nodeName)
		return
	}
	startTime := time.Now()
	pl.Unreserve(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(unreserve, pl.Name(), nil, metrics.SinceInSeconds(startTime))
}

// RunPermitPlugins runs the set of configured permit plugins. If any of these
// plugins returns a status other than "Success" or "Wait", it does not continue
// running the remaining plugins and returns an error. Otherwise, if any of the
// plugins returns "Wait", then this function will create and add waiting pod
// to a map of currently waiting pods and return status with "Wait" code.
// Pod will remain waiting pod for the minimum duration returned by the permit plugins.
func (f *frameworkImpl) RunPermitPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, nodeName string) (status *framework.Status) {
	startTime := time.Now()
	defer func() {
		metrics.FrameworkExtensionPointDuration.WithLabelValues(permit, status.Code().String(), f.profileName).Observe(metrics.SinceInSeconds(startTime))
	}()
	pluginsWaitTime := make(map[string]time.Duration)
	statusCode := framework.Success
	for _, pl := range f.permitPlugins {
		status, timeout := f.runPermitPlugin(ctx, pl, state, pod, nodeName)
		if !status.IsSuccess() {
			if status.IsUnschedulable() {
				msg := fmt.Sprintf("rejected pod %q by permit plugin %q: %v", pod.Name, pl.Name(), status.Message())
				klog.V(4).Infof(msg)
				status.SetFailedPlugin(pl.Name())
				return status
			}
			if status.Code() == framework.Wait {
				// Not allowed to be greater than maxTimeout.
				if timeout > maxTimeout {
					timeout = maxTimeout
				}
				pluginsWaitTime[pl.Name()] = timeout
				statusCode = framework.Wait
			} else {
				err := status.AsError()
				klog.ErrorS(err, "Failed running Permit plugin", "plugin", pl.Name(), "pod", klog.KObj(pod))
				return framework.AsStatus(fmt.Errorf("running Permit plugin %q: %w", pl.Name(), err)).WithFailedPlugin(pl.Name())
			}
		}
	}
	if statusCode == framework.Wait {
		waitingPod := newWaitingPod(pod, pluginsWaitTime)
		f.waitingPods.add(waitingPod)
		msg := fmt.Sprintf("one or more plugins asked to wait and no plugin rejected pod %q", pod.Name)
		klog.V(4).Infof(msg)
		return framework.NewStatus(framework.Wait, msg)
	}
	return nil
}

func (f *frameworkImpl) runPermitPlugin(ctx context.Context, pl framework.PermitPlugin, state *framework.CycleState, pod *v1.Pod, nodeName string) (*framework.Status, time.Duration) {
	if !state.ShouldRecordPluginMetrics() {
		return pl.Permit(ctx, state, pod, nodeName)
	}
	startTime := time.Now()
	status, timeout := pl.Permit(ctx, state, pod, nodeName)
	f.metricsRecorder.observePluginDurationAsync(permit, pl.Name(), status, metrics.SinceInSeconds(startTime))
	return status, timeout
}

// WaitOnPermit will block, if the pod is a waiting pod, until the waiting pod is rejected or allowed.
func (f *frameworkImpl) WaitOnPermit(ctx context.Context, pod *v1.Pod) *framework.Status {
	waitingPod := f.waitingPods.get(pod.UID)
	if waitingPod == nil {
		return nil
	}
	defer f.waitingPods.remove(pod.UID)
	klog.V(4).Infof("pod %q waiting on permit", pod.Name)

	startTime := time.Now()
	s := <-waitingPod.s
	metrics.PermitWaitDuration.WithLabelValues(s.Code().String()).Observe(metrics.SinceInSeconds(startTime))

	if !s.IsSuccess() {
		if s.IsUnschedulable() {
			msg := fmt.Sprintf("pod %q rejected while waiting on permit: %v", pod.Name, s.Message())
			klog.V(4).Infof(msg)
			s.SetFailedPlugin(s.FailedPlugin())
			return s
		}
		err := s.AsError()
		klog.ErrorS(err, "Failed waiting on permit for pod", "pod", klog.KObj(pod))
		return framework.AsStatus(fmt.Errorf("waiting on permit for pod: %w", err)).WithFailedPlugin(s.FailedPlugin())
	}
	return nil
}

// SnapshotSharedLister returns the scheduler's SharedLister of the latest NodeInfo
// snapshot. The snapshot is taken at the beginning of a scheduling cycle and remains
// unchanged until a pod finishes "Reserve". There is no guarantee that the information
// remains unchanged after "Reserve".
func (f *frameworkImpl) SnapshotSharedLister() framework.SharedLister {
	return f.snapshotSharedLister
}

// IterateOverWaitingPods acquires a read lock and iterates over the WaitingPods map.
func (f *frameworkImpl) IterateOverWaitingPods(callback func(framework.WaitingPod)) {
	f.waitingPods.iterate(callback)
}

// GetWaitingPod returns a reference to a WaitingPod given its UID.
func (f *frameworkImpl) GetWaitingPod(uid types.UID) framework.WaitingPod {
	if wp := f.waitingPods.get(uid); wp != nil {
		return wp
	}
	return nil // Returning nil instead of *waitingPod(nil).
}

// RejectWaitingPod rejects a WaitingPod given its UID.
func (f *frameworkImpl) RejectWaitingPod(uid types.UID) {
	waitingPod := f.waitingPods.get(uid)
	if waitingPod != nil {
		waitingPod.Reject("", "removed")
	}
}

// HasFilterPlugins returns true if at least one filter plugin is defined.
func (f *frameworkImpl) HasFilterPlugins() bool {
	return len(f.filterPlugins) > 0
}

// HasPostFilterPlugins returns true if at least one postFilter plugin is defined.
func (f *frameworkImpl) HasPostFilterPlugins() bool {
	return len(f.postFilterPlugins) > 0
}

// HasScorePlugins returns true if at least one score plugin is defined.
func (f *frameworkImpl) HasScorePlugins() bool {
	return len(f.scorePlugins) > 0
}

// ListPlugins returns a map of extension point name to plugin names configured at each extension
// point. Returns nil if no plugins where configured.
func (f *frameworkImpl) ListPlugins() map[string][]config.Plugin {
	m := make(map[string][]config.Plugin)

	for _, e := range f.getExtensionPoints(&config.Plugins{}) {
		plugins := reflect.ValueOf(e.slicePtr).Elem()
		extName := plugins.Type().Elem().Name()
		var cfgs []config.Plugin
		for i := 0; i < plugins.Len(); i++ {
			name := plugins.Index(i).Interface().(framework.Plugin).Name()
			p := config.Plugin{Name: name}
			if extName == "ScorePlugin" {
				// Weights apply only to score plugins.
				p.Weight = int32(f.pluginNameToWeightMap[name])
			}
			cfgs = append(cfgs, p)
		}
		if len(cfgs) > 0 {
			m[extName] = cfgs
		}
	}
	if len(m) > 0 {
		return m
	}
	return nil
}

// ClientSet returns a kubernetes clientset.
func (f *frameworkImpl) ClientSet() clientset.Interface {
	return f.clientSet
}

// EventRecorder returns an event recorder.
func (f *frameworkImpl) EventRecorder() events.EventRecorder {
	return f.eventRecorder
}

// SharedInformerFactory returns a shared informer factory.
func (f *frameworkImpl) SharedInformerFactory() informers.SharedInformerFactory {
	return f.informerFactory
}

func (f *frameworkImpl) pluginsNeeded(plugins *config.Plugins) map[string]config.Plugin {
	pgMap := make(map[string]config.Plugin)

	if plugins == nil {
		return pgMap
	}

	find := func(pgs config.PluginSet) {
		for _, pg := range pgs.Enabled {
			pgMap[pg.Name] = pg
		}
	}
	for _, e := range f.getExtensionPoints(plugins) {
		find(e.plugins)
	}
	return pgMap
}

// ProfileName returns the profile name associated to this framework.
func (f *frameworkImpl) ProfileName() string {
	return f.profileName
}
