"encoding/json"
	"fmt"
	"os"

	"github.com/fsnotify/fsnotify"

	"istio.io/istio/pkg/file"
	"istio.io/istio/pkg/log"
)

type Watcher struct {
	watcher *fsnotify.Watcher
	Events  chan struct{}
	Errors  chan error
}

// Waits until a file is modified (returns nil), the context is cancelled (returns context error), or returns error
func (w *Watcher) Wait(ctx context.Context) error {
	select {
	case <-w.Events:

	remoteHost := remote.HostName()

	// 1: Echo
	serverSent := make(chan struct{})
	serverCanceled := make(chan struct{})
	register := func(manager *Manager) {
		errFatal(manager.RegisterStreamingHandler(handlerTest, StreamHandler{
			Handle: func(ctx context.Context, payload []byte, _ <-chan []byte, resp chan<- []byte) *RemoteErr {
				// Send many responses.
				// Test that this doesn't block.

	desc *prometheus.Desc
}

// Describe sends the super-set of all possible descriptors of metrics
func (c *minioCollector) Describe(ch chan<- *prometheus.Desc) {
	ch <- c.desc
}

// Collect is called by the Prometheus registry when collecting metrics.
func (c *minioCollector) Collect(ch chan<- prometheus.Metric) {
	// Expose MinIO's version information
	minioVersionInfo.WithLabelValues(Version, CommitID).Set(1.0)

	// Use buffered channel to take care of burst sends or slow w.Write()
	mergeCh := make(chan []byte, globalAPIConfig.getRequestsPoolCapacity()*len(globalEndpoints.Hostnames()))
	localCh := make(chan event.Event, globalAPIConfig.getRequestsPoolCapacity())

	// Convert local messages to JSON and send to mergeCh
	go func() {

func (m *muxClient) handleTwowayResponses(responseCh chan<- Response, internalResp <-chan Response) {
	defer m.parent.deleteMux(false, m.MuxID)
	defer xioutil.SafeClose(responseCh)
	for resp := range internalResp {
		responseCh <- resp
		m.send(message{Op: OpUnblockSrvMux, MuxID: m.MuxID})
	}
}

func (m *muxClient) handleTwowayRequests(internalResp chan<- Response, requests <-chan []byte) {
	var errState bool
	if debugPrint {

	return nil
}

func (m MockPortForwarder) Address() string {
	return "localhost:3456"
}

func (m MockPortForwarder) Close() {
}

func (m MockPortForwarder) ErrChan() <-chan error {
	return make(chan error)
}

func (m MockPortForwarder) WaitForStop() {
}

var _ kube.PortForwarder = MockPortForwarder{}

type MockClient struct {

	saver := z.serverPools[o.pool].sets[o.set]

	// Disconnect from call above, but cancel on exit.
	listCtx, cancel := context.WithCancel(GlobalContext)
	saveCh := make(chan metaCacheEntry, metacacheBlockSize)
	inCh := make(chan metaCacheEntry, metacacheBlockSize)
	outCh := make(chan metaCacheEntry, o.Limit)

	filteredResults := o.gatherResults(ctx, outCh)

	mc := o.newMetacache()

		confirms := ch.NotifyPublish(make(chan amqp091.Confirmation, 1))
		if err := ch.Confirm(false); err != nil {
			ch.Close()
			return nil, nil, err
		}
		return ch, confirms, nil
	}

	return ch, nil, nil
}

// send - sends an event to the AMQP091.
func (target *AMQPTarget) send(eventData event.Event, ch *amqp091.Channel, confirms chan amqp091.Confirmation) error {

func readMultipleFiles(ctx context.Context, disks []StorageAPI, req ReadMultipleReq, readQuorum int) ([]ReadMultipleResp, error) {
	resps := make([]chan ReadMultipleResp, len(disks))
	for i := range resps {
		resps[i] = make(chan ReadMultipleResp, len(req.Files))
	}
	g := errgroup.WithNErrs(len(disks))
	// Read files in parallel across disks.
	for index := range disks {
		index := index

			// Call with goroutine to test fsnotify watcher
			parent, cancel := context.WithCancel(context.Background())
			defer cancel()
			resultChan, errChan := make(chan string, 1), make(chan error, 1)
			go func(resultChan chan string, errChan chan error, ctx context.Context, cfg pluginConfig) {
				result, err := getCNIConfigFilepath(ctx, cfg)
				if err != nil {
					errChan <- err
					return
				}