// limitations under the License.

package nodeagent

import (
	"net/http"
	"sync/atomic"

	"istio.io/istio/cni/pkg/constants"
)

// StartHealthServer initializes and starts a web server that exposes liveness and readiness endpoints at port 8000.
func StartHealthServer() (installReady *atomic.Value, watchReady *atomic.Value) {
	router := http.NewServeMux()
	installReady, watchReady = initRouter(router)

	go func() {

	Scheme          string
	Online          bool
	lastOnline      time.Time
	lastHCAt        time.Time
	offlineDuration time.Duration
	latency         latencyStat
}

// isOffline returns current liveness result of remote target. Add endpoint to
// healthCheck map if missing and default to online status
func (sys *BucketTargetSys) isOffline(ep *url.URL) bool {
	sys.hMutex.RLock()
	defer sys.hMutex.RUnlock()

	RepairFieldSelectors     = "repair-field-selectors"
)

// Internal constants
const (
	DefaultKubeconfigMode = 0o600

	CNIAddEventPath = "/cmdadd"
	UDSLogPath      = "/log"

	// K8s liveness and readiness endpoints
	LivenessEndpoint  = "/healthz"
	ReadinessEndpoint = "/readyz"
	ReadinessPort     = "8000"
)

// Exposed for testing constants
var (
	CNIBinDir          = "/opt/cni/bin"

var errErasureV3ThisEmpty = fmt.Errorf("Erasure format version 3 has This field empty")

// isServerResolvable - checks if the endpoint is resolvable
// by sending a naked HTTP request with liveness checks.
func isServerResolvable(endpoint Endpoint, timeout time.Duration) error {
	serverURL := &url.URL{
		Scheme: endpoint.Scheme,
		Host:   endpoint.Host,

			}
			return
		}
	}
	writeResponse(w, http.StatusOK, nil, mimeNone)
}

// LivenessCheckHandler checks whether MinIO is up. It differs from the
// readiness handler since a failing liveness check causes pod restarts
// in K8S environments. Therefore, it does not contact external systems.
func LivenessCheckHandler(w http.ResponseWriter, r *http.Request) {
	if objLayer := newObjectLayerFn(); objLayer == nil {

	// Response sender goroutine...
	go func(outBlock <-chan struct{}) {
		wg.Wait()
		defer m.parent.deleteMux(true, m.ID)
		m.sendResponses(ctx, send, c, &handlerErr, outBlock)
	}(m.outBlock)

	// Remote aliveness check if needed.
	if msg.DeadlineMS == 0 || msg.DeadlineMS > uint32(lastPingThreshold/time.Millisecond) {
		go func() {
			wg.Wait()
			m.checkRemoteAlive()
		}()
	}
	return &m
}