"github.com/zeebo/xxh3"
	"golang.org/x/exp/maps"
	"golang.org/x/exp/slices"
)

const (
	throttleDeadline = 1 * time.Hour
	// ReplicationReset has reset id and timestamp of last reset operation
	ReplicationReset = "replication-reset"
	// ReplicationStatus has internal replication status - stringified representation of target's replication status for all replication
	// activity initiated from this cluster

type PeerSiteInfo struct {
	madmin.PeerSite
	self         bool
	DeploymentID string
	Replicated   bool // true if already participating in site replication
	Empty        bool // true if cluster has no buckets
}

// getSiteStatuses gathers more info on the sites being added
func (c *SiteReplicationSys) getSiteStatuses(ctx context.Context, sites ...madmin.PeerSite) (psi []PeerSiteInfo, err error) {

		}

		metrics = make([]MetricV2, 0, 50)
		dataUsageInfo, err := loadDataUsageFromBackend(ctx, objLayer)
		if err != nil {
			metricsLogIf(ctx, err)
			return
		}

		// data usage has not captured any data yet.
		if dataUsageInfo.LastUpdate.IsZero() {
			return
		}

		metrics = append(metrics, MetricV2{
			Description: getUsageLastScanActivityMD(),

// and If-Unmodified-Since headers set are validated.
// If-Modified-Since - Return the object only if it has been modified since the specified time, else return a 304 (not modified).
// If-Unmodified-Since - Return the object only if it has not been modified since the specified time, else return a 412 (precondition failed).
func (s *TestSuiteCommon) TestHeadOnObjectLastModified(c *check) {

			// write error response only if no data or headers has been written to client yet
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
		return
	}

	if err = httpWriter.Close(); err != nil {
		if !httpWriter.HasWritten() && !statusCodeWritten { // write error response only if no data or headers has been written to client yet
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)

func testAPIHeadObjectHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
	credentials auth.Credentials, t *testing.T,
) {
	objectName := "test-object"
	// set of byte data for PutObject.
	// object has to be created before running tests for HeadObject.
	// this is required even to assert the HeadObject data,
	// since dataInserted === dataFetched back is a primary criteria for any object storage this assertion is critical.