//
// 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"
	"errors"
	"fmt"
	"io"
	"sync"
	"time"

	"github.com/gobwas/ws/wsutil"
)

	"sync/atomic"

	"github.com/minio/minio/internal/fips"
	"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]

// globalGridStart is a channel that will block startup of grid connections until closed.
var globalGridStart = make(chan 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)

//
// 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

//go:generate msgp -unexported -file=$GOFILE -tests=false -o=grid_types_msgp_test.go

type testRequest struct {
	Num    int
	String string
}

type testResponse struct {
	OrgNum    int
	OrgString string
	Embedded  testRequest
}

package grid

// Code generated by github.com/tinylib/msgp DO NOT EDIT.

import (
	"github.com/tinylib/msgp/msgp"
)

// DecodeMsg implements msgp.Decodable
func (z *testRequest) DecodeMsg(dc *msgp.Reader) (err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, err = dc.ReadMapHeader()
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--
		field, err = dc.ReadMapKeyPtr()

	lockRPCUnlock      = newLockHandler(grid.HandlerLockUnlock)
	lockRPCRLock       = newLockHandler(grid.HandlerLockRLock)
	lockRPCRUnlock     = newLockHandler(grid.HandlerLockRUnlock)
)

func newLockHandler(h grid.HandlerID) *grid.SingleHandler[*dsync.LockArgs, *dsync.LockResp] {
	return grid.NewSingleHandler[*dsync.LockArgs, *dsync.LockResp](h, func() *dsync.LockArgs {
		return &dsync.LockArgs{}
	}, func() *dsync.LockResp {

	var opts WalkDirOptions
	_, err := opts.UnmarshalMsg(payload)
	if err != nil {
		return grid.NewRemoteErr(err)
	}

	if !s.checkID(opts.DiskID) {
		return grid.NewRemoteErr(errDiskNotFound)
	}

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()
	return grid.NewRemoteErr(s.getStorage().WalkDir(ctx, opts, grid.WriterToChannel(ctx, out)))

	// Register bootstrap REST router for distributed setups.
	registerBootstrapRESTHandlers(globalGrid.Load())

	// Register distributed namespace lock routers.
	registerLockRESTHandlers()

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

// List of some generic middlewares which are applied for all incoming requests.
var globalMiddlewares = []mux.MiddlewareFunc{

	"github.com/minio/minio/internal/dsync"
	"github.com/minio/minio/internal/grid"
)

// lockRESTClient is authenticable lock REST client
type lockRESTClient struct {
	connection *grid.Connection
}

// IsOnline - returns whether REST client failed to connect or not.
func (c *lockRESTClient) IsOnline() bool {
	return c.connection.State() == grid.StateConnected
}

// Not a local locker

// GNU Affero General Public License for more details.
//
// 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

// ConnectionStats contains connection statistics.
type ConnectionStats struct {
	OutgoingStreams int
	IncomingStreams int