import (
	"context"
	"errors"
)

// A Stream is a two-way stream.
// All responses *must* be read by the caller.
// If the call is canceled through the context,
// the appropriate error will be returned.
type Stream struct {
	// responses from the remote server.
	// Channel will be closed after error or when remote closes.
	// All responses *must* be read by the caller until either an error is returned or the channel is closed.

	_, err := storageWriteAllRPC.Call(ctx, client.gridConn, &WriteAllHandlerParams{
		DiskID:   *client.diskID.Load(),
		Volume:   volume,
		FilePath: path,
		Buf:      b,
	})
	return toStorageErr(err)
}

// CheckParts - stat all file parts.
func (client *storageRESTClient) CheckParts(ctx context.Context, volume string, path string, fi FileInfo) error {

		// of such a bucket. This is needed here as we identify such
		// buckets here while listing buckets. As part of regular
		// globalBucketMetadataSys.Init() call would get a valid
		// buckets only and not the quourum lost ones like this, so
		// explicit call
		for bktName, count := range bucketsMap {
			if count < quorum {
				// Queue a bucket heal task
				globalMRFState.addPartialOp(partialOperation{

	NumVersions      int       `msg:"nv"`
	SuccessorModTime time.Time `msg:"smt"`

	Fresh bool `msg:"fr"` // indicates this is a first time call to write FileInfo.

	// Position of this version or object in a multi-object delete call,
	// no other caller must set this value other than multi-object delete call.
	// usage in other calls in undefined please avoid.
	Idx int `msg:"i"`

	// Combined checksum when object was uploaded.

	}

	// Returns success.
	return
}

// Call - make a REST call with context.
func (c *Client) Call(ctx context.Context, method string, values url.Values, body io.Reader, length int64) (reply io.ReadCloser, err error) {
	if !c.IsOnline() {
		return nil, &NetworkError{Err: c.LastError()}
	}

	// Shallow copy. We don't modify the *UserInfo, if set.
	// All other fields are copied.
	u := *c.url

	if o.Limit == 0 {
		return entries, io.EOF
	}

	// For delimiter and prefix as '/' we do not list anything at all
	// along // with the prefix. On a flat namespace with 'prefix'
	// as '/' we don't have any entries, since all the keys are
	// of form 'keyName/...'
	if strings.HasPrefix(o.Prefix, SlashSeparator) {
		return entries, io.EOF
	}

// The permission bits perm (before umask) are used for all
// directories that MkdirAll creates.
// If path is already a directory, MkdirAll does nothing
// and returns nil.
func osMkdirAll(dirPath string, perm os.FileMode, baseDir string) error {
	if baseDir != "" {
		if strings.HasPrefix(baseDir, dirPath) {
			return nil
		}
	}

	// Slow path: make sure parent exists and then call Mkdir for path.
	i := len(dirPath)

	req.Header.Set("Content-Type", contentTypeHdr)
	req.Header.Set("User-Agent", "Mozilla")

	// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic of the handler.
	// Call the ServeHTTP to execute the handler.
	apiRouter.ServeHTTP(rec, req)

	ctx, cancel := context.WithCancel(GlobalContext)
	defer cancel()

	// Now check if we actually wrote to backend (regardless of the response

			// that for fresh PutObject() call dstDataPath can never exist.
			// if its an overwrite then the caller deletes the DataDir
			// in a separate RPC call.
			s.moveToTrash(dstDataPath, true, false)

			// If we are healing we should purge any legacyDataPath content,
			// that was previously preserved during PutObject() call
			// on a versioned bucket.

		if err1 == err || errors.Is(err1, err) {
			i++
		}
	}
	return i
}

// Does all errors indicate we need to initialize all disks?.
func shouldInitErasureDisks(errs []error) bool {
	return countErrs(errs, errUnformattedDisk) == len(errs)
}

// Check if unformatted disks are equal to 50%+1 of all the drives.
func quorumUnformattedDisks(errs []error) bool {