// CreatePetSetList creates paginated list of Pet Set model
// objects based on Kubernetes Pet Set objects array and related resources arrays.
func CreatePetSetList(petSets []apps.PetSet, pods []api.Pod, events []api.Event,
	dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) *PetSetList {

	petSetList := &PetSetList{
		PetSets:  make([]PetSet, 0),
		ListMeta: common.ListMeta{TotalItems: len(petSets)},
	}

	cachedResources := &dataselect.CachedResources{
		Pods: pods,
	}
	replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(petset.ToCells(petSets), dsQuery, cachedResources, heapsterClient)
	petSets = petset.FromCells(replicationControllerCells)

	for _, petSet := range petSets {
		matchingPods := common.FilterNamespacedPodsBySelector(pods, petSet.ObjectMeta.Namespace,
			petSet.Spec.Selector.MatchLabels)
		// TODO(floreks): Conversion should be omitted when client type will be updated
		podInfo := common.GetPodInfo(int32(petSet.Status.Replicas), int32(petSet.Spec.Replicas),
			matchingPods)
		podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)

		petSetList.PetSets = append(petSetList.PetSets, ToPetSet(&petSet, &podInfo))
	}

	cumulativeMetrics, err := metricPromises.GetMetrics()
	petSetList.CumulativeMetrics = cumulativeMetrics
	if err != nil {
		petSetList.CumulativeMetrics = make([]metric.Metric, 0)
	}

	return petSetList
}

// CreateReplicaSetList creates paginated list of Replica Set model
// objects based on Kubernetes Replica Set objects array and related resources arrays.
func CreateReplicaSetList(replicaSets []extensions.ReplicaSet, pods []api.Pod,
	events []api.Event, dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) *ReplicaSetList {

	replicaSetList := &ReplicaSetList{
		ReplicaSets: make([]replicaset.ReplicaSet, 0),
		ListMeta:    common.ListMeta{TotalItems: len(replicaSets)},
	}

	cachedResources := &dataselect.CachedResources{
		Pods: pods,
	}
	replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(replicaset.ToCells(replicaSets), dsQuery, cachedResources, heapsterClient)
	replicaSets = replicaset.FromCells(replicationControllerCells)

	for _, replicaSet := range replicaSets {
		matchingPods := common.FilterNamespacedPodsBySelector(pods, replicaSet.ObjectMeta.Namespace,
			replicaSet.Spec.Selector.MatchLabels)
		podInfo := common.GetPodInfo(replicaSet.Status.Replicas,
			replicaSet.Spec.Replicas, matchingPods)
		podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)

		replicaSetList.ReplicaSets = append(replicaSetList.ReplicaSets, replicaset.ToReplicaSet(&replicaSet, &podInfo))
	}

	cumulativeMetrics, err := metricPromises.GetMetrics()
	replicaSetList.CumulativeMetrics = cumulativeMetrics
	if err != nil {
		replicaSetList.CumulativeMetrics = make([]metric.Metric, 0)
	}

	return replicaSetList
}

func CreatePodList(pods []api.Pod, dsQuery *dataselect.DataSelectQuery,
	heapsterClient client.HeapsterClient) PodList {

	channels := &common.ResourceChannels{
		PodMetrics: common.GetPodListMetricsChannel(heapsterClient, pods, 1),
	}

	if err := <-channels.PodMetrics.Error; err != nil {
		log.Printf("Skipping Heapster metrics because of error: %s\n", err)
	}
	metrics := <-channels.PodMetrics.MetricsByPod

	podList := PodList{
		Pods:     make([]Pod, 0),
		ListMeta: common.ListMeta{TotalItems: len(pods)},
	}

	podCells, cumulativeMetricsPromises := dataselect.GenericDataSelectWithMetrics(toCells(pods), dsQuery,
		dataselect.NoResourceCache, &heapsterClient)
	pods = fromCells(podCells)

	for _, pod := range pods {
		podDetail := ToPod(&pod, metrics)
		podList.Pods = append(podList.Pods, podDetail)
	}

	cumulativeMetrics, err := cumulativeMetricsPromises.GetMetrics()
	podList.CumulativeMetrics = cumulativeMetrics
	if err != nil {
		podList.CumulativeMetrics = make([]metric.Metric, 0)
	}

	return podList
}

// GetNodeDetail gets node details.
func GetNodeDetail(client k8sClient.Interface, heapsterClient client.HeapsterClient, name string) (*NodeDetail, error) {
	log.Printf("Getting details of %s node", name)

	node, err := client.Core().Nodes().Get(name)
	if err != nil {
		return nil, err
	}

	// Download standard metrics. Currently metrics are hard coded, but it is possible to replace
	// dataselect.StdMetricsDataSelect with data select provided in the request.
	_, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells([]api.Node{*node}),
		dataselect.StdMetricsDataSelect,
		dataselect.NoResourceCache, &heapsterClient)

	pods, err := getNodePods(client, *node)
	if err != nil {
		return nil, err
	}

	podList, err := GetNodePods(client, heapsterClient, dataselect.DefaultDataSelect, name)

	eventList, err := event.GetNodeEvents(client, dataselect.DefaultDataSelect, node.Name)
	if err != nil {
		return nil, err
	}

	allocatedResources, err := getNodeAllocatedResources(*node, pods)
	if err != nil {
		return nil, err
	}

	metrics, _ := metricPromises.GetMetrics()
	nodeDetails := toNodeDetail(*node, podList, eventList, allocatedResources, metrics)
	return &nodeDetails, nil
}

// CreateJobList returns a list of all Job model objects in the cluster, based on all
// Kubernetes Job API objects.
func CreateJobList(jobs []batch.Job, pods []api.Pod, events []api.Event,
	dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) *JobList {

	jobList := &JobList{
		Jobs:     make([]Job, 0),
		ListMeta: common.ListMeta{TotalItems: len(jobs)},
	}

	cachedResources := &dataselect.CachedResources{
		Pods: pods,
	}
	replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells(jobs), dsQuery, cachedResources, heapsterClient)
	jobs = fromCells(replicationControllerCells)

	for _, job := range jobs {
		var completions int32
		matchingPods := common.FilterNamespacedPodsBySelector(pods, job.ObjectMeta.Namespace,
			job.Spec.Selector.MatchLabels)
		if job.Spec.Completions != nil {
			completions = *job.Spec.Completions
		}
		podInfo := common.GetPodInfo(job.Status.Active, completions, matchingPods)
		podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)

		jobList.Jobs = append(jobList.Jobs, ToJob(&job, &podInfo))
	}

	cumulativeMetrics, err := metricPromises.GetMetrics()
	jobList.CumulativeMetrics = cumulativeMetrics
	if err != nil {
		jobList.CumulativeMetrics = make([]metric.Metric, 0)
	}

	return jobList
}

// GetPodDetail returns the details (PodDetail) of a named Pod from a particular
// namespace.
func GetPodDetail(client k8sClient.Interface, heapsterClient client.HeapsterClient,
	namespace, name string) (*PodDetail, error) {

	log.Printf("Getting details of %s pod in %s namespace", name, namespace)

	channels := &common.ResourceChannels{
		ConfigMapList: common.GetConfigMapListChannel(client, common.NewSameNamespaceQuery(namespace), 1),
		PodMetrics:    common.GetPodMetricsChannel(heapsterClient, name, namespace),
	}

	pod, err := client.Pods(namespace).Get(name)

	if err != nil {
		return nil, err
	}

	// Download metrics
	_, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells([]api.Pod{*pod}),
		dataselect.StdMetricsDataSelect, dataselect.NoResourceCache, &heapsterClient)
	metrics, _ := metricPromises.GetMetrics()

	if err = <-channels.ConfigMapList.Error; err != nil {
		return nil, err
	}
	configMapList := <-channels.ConfigMapList.List

	podDetail := toPodDetail(pod, metrics, configMapList)
	return &podDetail, nil
}

// GetPodDetail returns the details (PodDetail) of a named Pod from a particular
// namespace.
func GetPodDetail(client k8sClient.Interface, heapsterClient client.HeapsterClient,
	namespace, name string) (*PodDetail, error) {

	log.Printf("Getting details of %s pod in %s namespace", name, namespace)

	channels := &common.ResourceChannels{
		ConfigMapList: common.GetConfigMapListChannel(client, common.NewSameNamespaceQuery(namespace), 1),
		PodMetrics:    common.GetPodMetricsChannel(heapsterClient, name, namespace),
	}

	pod, err := client.Core().Pods(namespace).Get(name)

	if err != nil {
		return nil, err
	}

	controller := Controller{
		Kind: "unknown",
	}
	creatorAnnotation, found := pod.ObjectMeta.Annotations[api.CreatedByAnnotation]
	if found {
		creatorRef, err := getPodCreator(client, creatorAnnotation, common.NewSameNamespaceQuery(namespace), heapsterClient)
		if err != nil {
			return nil, err
		}
		controller = *creatorRef
	}

	// Download metrics
	_, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells([]api.Pod{*pod}),
		dataselect.StdMetricsDataSelect, dataselect.NoResourceCache, &heapsterClient)
	metrics, _ := metricPromises.GetMetrics()

	if err = <-channels.ConfigMapList.Error; err != nil {
		return nil, err
	}
	configMapList := <-channels.ConfigMapList.List

	podDetail := toPodDetail(pod, metrics, configMapList, controller)
	return &podDetail, nil
}

func toNodeList(nodes []api.Node, dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) *NodeList {
	nodeList := &NodeList{
		Nodes:    make([]Node, 0),
		ListMeta: common.ListMeta{TotalItems: len(nodes)},
	}

	replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells(nodes), dsQuery, dataselect.NoResourceCache, heapsterClient)
	nodes = fromCells(replicationControllerCells)

	for _, node := range nodes {
		nodeList.Nodes = append(nodeList.Nodes, toNode(node))
	}

	// this may be slow because heapster does not support all in one download for nodes.
	cumulativeMetrics, err := metricPromises.GetMetrics()
	nodeList.CumulativeMetrics = cumulativeMetrics
	if err != nil {
		nodeList.CumulativeMetrics = make([]metric.Metric, 0)
	}

	return nodeList
}

// CreateDeploymentList returns a list of all Deployment model objects in the cluster, based on all
// Kubernetes Deployment API objects.
func CreateDeploymentList(deployments []extensions.Deployment, pods []api.Pod,
	events []api.Event, dsQuery *dataselect.DataSelectQuery, heapsterClient *heapster.HeapsterClient) *DeploymentList {

	deploymentList := &DeploymentList{
		Deployments: make([]Deployment, 0),
		ListMeta:    common.ListMeta{TotalItems: len(deployments)},
	}

	cachedResources := &dataselect.CachedResources{
		Pods: pods,
	}
	replicationControllerCells, metricPromises := dataselect.GenericDataSelectWithMetrics(toCells(deployments), dsQuery, cachedResources, heapsterClient)
	deployments = fromCells(replicationControllerCells)

	for _, deployment := range deployments {

		matchingPods := common.FilterNamespacedPodsBySelector(pods, deployment.ObjectMeta.Namespace,
			deployment.Spec.Selector.MatchLabels)
		podInfo := common.GetPodInfo(deployment.Status.Replicas, deployment.Spec.Replicas,
			matchingPods)
		podInfo.Warnings = event.GetPodsEventWarnings(events, matchingPods)

		deploymentList.Deployments = append(deploymentList.Deployments,
			Deployment{
				ObjectMeta:      common.NewObjectMeta(deployment.ObjectMeta),
				TypeMeta:        common.NewTypeMeta(common.ResourceKindDeployment),
				ContainerImages: common.GetContainerImages(&deployment.Spec.Template.Spec),
				Pods:            podInfo,
			})
	}

	cumulativeMetrics, err := metricPromises.GetMetrics()
	deploymentList.CumulativeMetrics = cumulativeMetrics
	if err != nil {
		deploymentList.CumulativeMetrics = make([]metric.Metric, 0)
	}

	return deploymentList
}