"github.com/minio/minio/internal/grid"
	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/minio/internal/rest"
)

// globalGrid is the global grid manager.
var globalGrid atomic.Pointer[grid.Manager]

// globalLockGrid is the global lock grid manager.
var globalLockGrid atomic.Pointer[grid.Manager]

// globalGridStart is a channel that will block startup of grid connections until closed.

//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

// Package grid provides single-connection two-way grid communication.
package grid

import (
	"context"
	"crypto/tls"
	"errors"
	"fmt"
	"io"
	"net"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/gobwas/ws"

	AuthToken ValidateTokenFn
}

// NewManager creates a new grid manager
func NewManager(ctx context.Context, o ManagerOptions) (*Manager, error) {
	found := false
	if o.AuthToken == nil {
		return nil, fmt.Errorf("grid: AuthToken not set")
	}
	if o.Dialer == nil {
		return nil, fmt.Errorf("grid: Dialer not set")
	}
	if o.AuthFn == nil {
		return nil, fmt.Errorf("grid: AuthFn not set")
	}
	m := &Manager{

		b.Helper()
		if err != nil {
			b.Fatal(err)
		}
	}
	rpc := NewSingleHandler[*testRequest, *testResponse](handlerTest2, newTestRequest, newTestResponse)
	grid, err := SetupTestGrid(n)
	errFatal(err)
	b.Cleanup(grid.Cleanup)
	// Create n managers.
	for _, remote := range grid.Managers {
		// Register a single handler which echos the payload.
		errFatal(remote.RegisterSingleHandler(handlerTest, func(payload []byte) ([]byte, *RemoteErr) {

	r = &http.Request{
		Proto:  "HTTP/1.1",
		Method: http.MethodGet,
		URL:    &url.URL{Path: grid.RoutePath},
	}
	if !guessIsRPCReq(r) {
		t.Fatal("Grid RPC path not detected")
	}
	r = &http.Request{
		Proto:  "HTTP/1.1",
		Method: http.MethodGet,
		URL:    &url.URL{Path: grid.RouteLockPath},
	}
	if !guessIsRPCReq(r) {
		t.Fatal("Grid RPC path not detected")
	}
}

var isHTTPHeaderSizeTooLargeTests = []struct {

	errFatal := func(err error) {
		t.Helper()
		if err != nil {
			t.Fatal(err)
		}
	}
	grid, err := SetupTestGrid(2)
	errFatal(err)
	t.Cleanup(grid.Cleanup)

	local := grid.Managers[0]
	localHost := grid.Hosts[0]
	remote := grid.Managers[1]
	remoteHost := grid.Hosts[1]

	connLocalToRemote := local.Connection(remoteHost)
	connRemoteLocal := remote.Connection(localHost)

		xhttp.DrainBody(respBody)
		return !isNetworkError(err)
	}
	var gridConn atomic.Pointer[grid.Connection]

	return &peerRESTClient{
		host: peer, restClient: restClient, gridHost: gridHost,
		gridConn: func() *grid.Connection {
			// Lazy initialization of grid connection.
			// When we create this peer client, the grid connection is likely not yet initialized.
			if gridHost == "" {

	debugBlockInboundMessages
)

// TestGrid contains a grid of servers for testing purposes.
type TestGrid struct {
	Servers     []*httptest.Server
	Listeners   []net.Listener
	Managers    []*Manager
	Mux         []*mux.Router
	Hosts       []string
	cleanupOnce sync.Once
	cancel      context.CancelFunc
}

// SetupTestGrid creates a new grid for testing purposes.
// Select the number of hosts to create.

	// Register distributed namespace lock routers.
	registerLockRESTHandlers(lockGrid)

	// Add lock grid to router
	router.Handle(grid.RouteLockPath, adminMiddleware(lockGrid.Handler(storageServerRequestValidate), noGZFlag, noObjLayerFlag))

	// Add grid to router
	router.Handle(grid.RoutePath, adminMiddleware(commonGrid.Handler(storageServerRequestValidate), noGZFlag, noObjLayerFlag))
}

    instance := grid.NewSingleHandler[*grid.MSS, *grid.MSS](h, grid.NewMSS, grid.NewMSS)

    // Register the handler on the manager
    instance.Register(manager, handler)

    // The typed instance is also used for calls
    conn := manager.Connection("host")
    resp, err := instance.Call(ctx, conn, grid.NewMSSWith(map[string]string{"myfield": "myvalue"}))
    if err == nil {