package internal

import (
	"bytes"
	"cmp"
	"context"
	"errors"
	"fmt"
	"io"
	"os"
	"slices"
	"sort"
	"strings"

	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/accounting"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
	containerSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/version"
)

var errMissingHeaderInResponse = errors.New("missing header in response")

// BalanceOfPrm groups parameters of BalanceOf operation.
type BalanceOfPrm struct {
	commonPrm
	client.PrmBalanceGet
}

// BalanceOfRes groups the resulting values of BalanceOf operation.
type BalanceOfRes struct {
	cliRes *client.ResBalanceGet
}

// Balance returns the current balance.
func (x BalanceOfRes) Balance() accounting.Decimal {
	return x.cliRes.Amount()
}

// BalanceOf requests the current balance of a FrostFS user.
//
// Returns any error which prevented the operation from completing correctly in error return.
func BalanceOf(ctx context.Context, prm BalanceOfPrm) (res BalanceOfRes, err error) {
	res.cliRes, err = prm.cli.BalanceGet(ctx, prm.PrmBalanceGet)

	return
}

// ListContainersPrm groups parameters of ListContainers operation.
type ListContainersPrm struct {
	commonPrm
	client.PrmContainerList
}

// ListContainersRes groups the resulting values of ListContainers operation.
type ListContainersRes struct {
	cliRes *client.ResContainerList
}

// IDList returns list of identifiers of user's containers.
func (x ListContainersRes) IDList() []cid.ID {
	return x.cliRes.Containers()
}

// ListContainers requests a list of FrostFS user's containers.
//
// Returns any error which prevented the operation from completing correctly in error return.
func ListContainers(ctx context.Context, prm ListContainersPrm) (res ListContainersRes, err error) {
	res.cliRes, err = prm.cli.ContainerList(ctx, prm.PrmContainerList)

	return
}

// SortedIDList returns sorted list of identifiers of user's containers.
func (x ListContainersRes) SortedIDList() []cid.ID {
	list := x.cliRes.Containers()
	sort.Slice(list, func(i, j int) bool {
		lhs, rhs := list[i].EncodeToString(), list[j].EncodeToString()
		return strings.Compare(lhs, rhs) < 0
	})
	return list
}

// PutContainerPrm groups parameters of PutContainer operation.
type PutContainerPrm struct {
	Client       *client.Client
	ClientParams client.PrmContainerPut
}

// PutContainerRes groups the resulting values of PutContainer operation.
type PutContainerRes struct {
	cnr cid.ID
}

// ID returns identifier of the created container.
func (x PutContainerRes) ID() cid.ID {
	return x.cnr
}

// PutContainer sends a request to save the container in FrostFS.
//
// Operation is asynchronous and not guaranteed even in the absence of errors.
// The required time is also not predictable.
//
// Success can be verified by reading by identifier.
//
// Returns any error which prevented the operation from completing correctly in error return.
func PutContainer(ctx context.Context, prm PutContainerPrm) (res PutContainerRes, err error) {
	cliRes, err := prm.Client.ContainerPut(ctx, prm.ClientParams)
	if err == nil {
		res.cnr = cliRes.ID()
	}

	return
}

// GetContainerPrm groups parameters of GetContainer operation.
type GetContainerPrm struct {
	Client       *client.Client
	ClientParams client.PrmContainerGet
}

// SetContainer sets identifier of the container to be read.
//
// Deprecated: Use GetContainerPrm.ClientParams.ContainerID instead.
func (x *GetContainerPrm) SetContainer(id cid.ID) {
	x.ClientParams.ContainerID = &id
}

// GetContainerRes groups the resulting values of GetContainer operation.
type GetContainerRes struct {
	cliRes *client.ResContainerGet
}

// Container returns structured of the requested container.
func (x GetContainerRes) Container() containerSDK.Container {
	return x.cliRes.Container()
}

// GetContainer reads a container from FrostFS by ID.
//
// Returns any error which prevented the operation from completing correctly in error return.
func GetContainer(ctx context.Context, prm GetContainerPrm) (res GetContainerRes, err error) {
	res.cliRes, err = prm.Client.ContainerGet(ctx, prm.ClientParams)

	return
}

// IsACLExtendable checks if ACL of the container referenced by the given identifier
// can be extended. Client connection MUST BE correctly established in advance.
func IsACLExtendable(ctx context.Context, c *client.Client, cnr cid.ID) (bool, error) {
	prm := GetContainerPrm{
		Client: c,
		ClientParams: client.PrmContainerGet{
			ContainerID: &cnr,
		},
	}

	res, err := GetContainer(ctx, prm)
	if err != nil {
		return false, fmt.Errorf("get container from the FrostFS: %w", err)
	}

	return res.Container().BasicACL().Extendable(), nil
}

// DeleteContainerPrm groups parameters of DeleteContainerPrm operation.
type DeleteContainerPrm struct {
	Client       *client.Client
	ClientParams client.PrmContainerDelete
}

// DeleteContainerRes groups the resulting values of DeleteContainer operation.
type DeleteContainerRes struct{}

// DeleteContainer sends a request to remove a container from FrostFS by ID.
//
// Operation is asynchronous and not guaranteed even in the absence of errors.
// The required time is also not predictable.
//
// Success can be verified by reading by identifier.
//
// Returns any error which prevented the operation from completing correctly in error return.
func DeleteContainer(ctx context.Context, prm DeleteContainerPrm) (res DeleteContainerRes, err error) {
	_, err = prm.Client.ContainerDelete(ctx, prm.ClientParams)

	return
}

// EACLPrm groups parameters of EACL operation.
type EACLPrm struct {
	Client       *client.Client
	ClientParams client.PrmContainerEACL
}

// EACLRes groups the resulting values of EACL operation.
type EACLRes struct {
	cliRes *client.ResContainerEACL
}

// EACL returns requested eACL table.
func (x EACLRes) EACL() eacl.Table {
	return x.cliRes.Table()
}

// EACL reads eACL table from FrostFS by container ID.
//
// Returns any error which prevented the operation from completing correctly in error return.
func EACL(ctx context.Context, prm EACLPrm) (res EACLRes, err error) {
	res.cliRes, err = prm.Client.ContainerEACL(ctx, prm.ClientParams)

	return
}

// NetworkInfoPrm groups parameters of NetworkInfo operation.
type NetworkInfoPrm struct {
	Client       *client.Client
	ClientParams client.PrmNetworkInfo
}

// NetworkInfoRes groups the resulting values of NetworkInfo operation.
type NetworkInfoRes struct {
	cliRes *client.ResNetworkInfo
}

// NetworkInfo returns structured information about the FrostFS network.
func (x NetworkInfoRes) NetworkInfo() netmap.NetworkInfo {
	return x.cliRes.Info()
}

// NetworkInfo reads information about the FrostFS network.
//
// Returns any error which prevented the operation from completing correctly in error return.
func NetworkInfo(ctx context.Context, prm NetworkInfoPrm) (res NetworkInfoRes, err error) {
	res.cliRes, err = prm.Client.NetworkInfo(ctx, prm.ClientParams)

	return
}

// NodeInfoPrm groups parameters of NodeInfo operation.
type NodeInfoPrm struct {
	Client       *client.Client
	ClientParams client.PrmEndpointInfo
}

// NodeInfoRes groups the resulting values of NodeInfo operation.
type NodeInfoRes struct {
	cliRes *client.ResEndpointInfo
}

// NodeInfo returns information about the node from netmap.
func (x NodeInfoRes) NodeInfo() netmap.NodeInfo {
	return x.cliRes.NodeInfo()
}

// LatestVersion returns the latest FrostFS API version in use.
func (x NodeInfoRes) LatestVersion() version.Version {
	return x.cliRes.LatestVersion()
}

// NodeInfo requests information about the remote server from FrostFS netmap.
//
// Returns any error which prevented the operation from completing correctly in error return.
func NodeInfo(ctx context.Context, prm NodeInfoPrm) (res NodeInfoRes, err error) {
	res.cliRes, err = prm.Client.EndpointInfo(ctx, prm.ClientParams)

	return
}

// NetMapSnapshotPrm groups parameters of NetMapSnapshot operation.
type NetMapSnapshotPrm struct {
	commonPrm
}

// NetMapSnapshotRes groups the resulting values of NetMapSnapshot operation.
type NetMapSnapshotRes struct {
	cliRes *client.ResNetMapSnapshot
}

// NetMap returns current local snapshot of the FrostFS network map.
func (x NetMapSnapshotRes) NetMap() netmap.NetMap {
	return x.cliRes.NetMap()
}

// NetMapSnapshot requests current network view of the remote server.
//
// Returns any error which prevented the operation from completing correctly in error return.
func NetMapSnapshot(ctx context.Context, prm NetMapSnapshotPrm) (res NetMapSnapshotRes, err error) {
	res.cliRes, err = prm.cli.NetMapSnapshot(ctx, client.PrmNetMapSnapshot{})
	return
}

// CreateSessionPrm groups parameters of CreateSession operation.
type CreateSessionPrm struct {
	commonPrm
	client.PrmSessionCreate
}

// CreateSessionRes groups the resulting values of CreateSession operation.
type CreateSessionRes struct {
	cliRes *client.ResSessionCreate
}

// ID returns session identifier.
func (x CreateSessionRes) ID() []byte {
	return x.cliRes.ID()
}

// SessionKey returns public session key in a binary format.
func (x CreateSessionRes) SessionKey() []byte {
	return x.cliRes.PublicKey()
}

// CreateSession opens a new unlimited session with the remote node.
//
// Returns any error which prevented the operation from completing correctly in error return.
func CreateSession(ctx context.Context, prm CreateSessionPrm) (res CreateSessionRes, err error) {
	res.cliRes, err = prm.cli.SessionCreate(ctx, prm.PrmSessionCreate)

	return
}

// PutObjectPrm groups parameters of PutObject operation.
type PutObjectPrm struct {
	commonObjectPrm

	copyNum []uint32

	hdr *objectSDK.Object

	rdr io.Reader

	headerCallback func()

	prepareLocally bool
}

// SetHeader sets object header.
func (x *PutObjectPrm) SetHeader(hdr *objectSDK.Object) {
	x.hdr = hdr
}

// SetPayloadReader sets reader of the object payload.
func (x *PutObjectPrm) SetPayloadReader(rdr io.Reader) {
	x.rdr = rdr
}

// SetHeaderCallback sets callback which is called on the object after the header is received
// but before the payload is written.
func (x *PutObjectPrm) SetHeaderCallback(f func()) {
	x.headerCallback = f
}

// SetCopiesNumberByVectors sets ordered list of minimal required object copies numbers
// per placement vector.
func (x *PutObjectPrm) SetCopiesNumberByVectors(copiesNumbers []uint32) {
	x.copyNum = copiesNumbers
}

// PrepareLocally generate object header on the client side.
// For big object - split locally too.
func (x *PutObjectPrm) PrepareLocally() {
	x.prepareLocally = true
}

func (x *PutObjectPrm) convertToSDKPrm(ctx context.Context) (client.PrmObjectPutInit, error) {
	putPrm := client.PrmObjectPutInit{
		XHeaders:     x.xHeaders,
		BearerToken:  x.bearerToken,
		Local:        x.local,
		CopiesNumber: x.copyNum,
	}

	if x.prepareLocally {
		res, err := x.cli.NetworkInfo(ctx, client.PrmNetworkInfo{})
		if err != nil {
			return client.PrmObjectPutInit{}, err
		}
		putPrm.MaxSize = res.Info().MaxObjectSize()
		putPrm.EpochSource = epochSource(res.Info().CurrentEpoch())
		putPrm.WithoutHomomorphHash = res.Info().HomomorphicHashingDisabled()
	} else {
		putPrm.Session = x.sessionToken
	}
	return putPrm, nil
}

// PutObjectRes groups the resulting values of PutObject operation.
type PutObjectRes struct {
	id oid.ID
}

// ID returns identifier of the created object.
func (x PutObjectRes) ID() oid.ID {
	return x.id
}

type epochSource uint64

func (s epochSource) CurrentEpoch() uint64 {
	return uint64(s)
}

// PutObject saves the object in FrostFS network.
//
// Returns any error which prevented the operation from completing correctly in error return.
func PutObject(ctx context.Context, prm PutObjectPrm) (*PutObjectRes, error) {
	sdkPrm, err := prm.convertToSDKPrm(ctx)
	if err != nil {
		return nil, fmt.Errorf("unable to create parameters of object put operation: %w", err)
	}
	wrt, err := prm.cli.ObjectPutInit(ctx, sdkPrm)
	if err != nil {
		return nil, fmt.Errorf("init object writing: %w", err)
	}

	if wrt.WriteHeader(ctx, *prm.hdr) {
		if prm.headerCallback != nil {
			prm.headerCallback()
		}

		sz := prm.hdr.PayloadSize()

		if data := prm.hdr.Payload(); len(data) > 0 {
			if prm.rdr != nil {
				prm.rdr = io.MultiReader(bytes.NewReader(data), prm.rdr)
			} else {
				prm.rdr = bytes.NewReader(data)
				sz = uint64(len(data))
			}
		}

		if prm.rdr != nil {
			const defaultBufferSizePut = 3 << 20 // Maximum chunk size is 3 MiB in the SDK.

			if sz == 0 || sz > defaultBufferSizePut {
				sz = defaultBufferSizePut
			}

			buf := make([]byte, sz)

			var n int

			for {
				n, err = prm.rdr.Read(buf)
				if n > 0 {
					if !wrt.WritePayloadChunk(ctx, buf[:n]) {
						break
					}

					continue
				}

				if errors.Is(err, io.EOF) {
					break
				}

				return nil, fmt.Errorf("read payload: %w", err)
			}
		}
	}

	cliRes, err := wrt.Close(ctx)
	if err != nil { // here err already carries both status and client errors
		return nil, fmt.Errorf("client failure: %w", err)
	}

	return &PutObjectRes{
		id: cliRes.StoredObjectID(),
	}, nil
}

// DeleteObjectPrm groups parameters of DeleteObject operation.
type DeleteObjectPrm struct {
	commonObjectPrm
	objectAddressPrm
}

// DeleteObjectRes groups the resulting values of DeleteObject operation.
type DeleteObjectRes struct {
	tomb oid.ID
}

// Tombstone returns the ID of the created object with tombstone.
func (x DeleteObjectRes) Tombstone() oid.ID {
	return x.tomb
}

// DeleteObject marks an object to be removed from FrostFS through tombstone placement.
//
// Returns any error which prevented the operation from completing correctly in error return.
func DeleteObject(ctx context.Context, prm DeleteObjectPrm) (*DeleteObjectRes, error) {
	cnr := prm.objAddr.Container()
	obj := prm.objAddr.Object()

	delPrm := client.PrmObjectDelete{
		XHeaders:    prm.xHeaders,
		ContainerID: &cnr,
		ObjectID:    &obj,
		Session:     prm.sessionToken,
		BearerToken: prm.bearerToken,
	}

	cliRes, err := prm.cli.ObjectDelete(ctx, delPrm)
	if err != nil {
		return nil, fmt.Errorf("remove object via client: %w", err)
	}

	return &DeleteObjectRes{
		tomb: cliRes.Tombstone(),
	}, nil
}

// GetObjectPrm groups parameters of GetObject operation.
type GetObjectPrm struct {
	commonObjectPrm
	objectAddressPrm
	rawPrm
	payloadWriterPrm
	headerCallback func(*objectSDK.Object)
}

// SetHeaderCallback sets callback which is called on the object after the header is received
// but before the payload is written.
func (p *GetObjectPrm) SetHeaderCallback(f func(*objectSDK.Object)) {
	p.headerCallback = f
}

// GetObjectRes groups the resulting values of GetObject operation.
type GetObjectRes struct {
	hdr *objectSDK.Object
}

// Header returns the header of the request object.
func (x GetObjectRes) Header() *objectSDK.Object {
	return x.hdr
}

// GetObject reads an object by address.
//
// Interrupts on any writer error. If successful, payload is written to the writer.
//
// Returns any error which prevented the operation from completing correctly in error return.
// For raw reading, returns *object.SplitInfoError error if object is virtual.
func GetObject(ctx context.Context, prm GetObjectPrm) (*GetObjectRes, error) {
	cnr := prm.objAddr.Container()
	obj := prm.objAddr.Object()

	getPrm := client.PrmObjectGet{
		XHeaders:    prm.xHeaders,
		BearerToken: prm.bearerToken,
		Session:     prm.sessionToken,
		Raw:         prm.raw,
		Local:       prm.local,
		ContainerID: &cnr,
		ObjectID:    &obj,
	}

	rdr, err := prm.cli.ObjectGetInit(ctx, getPrm)
	if err != nil {
		return nil, fmt.Errorf("init object reading on client: %w", err)
	}

	var hdr objectSDK.Object

	if !rdr.ReadHeader(&hdr) {
		_, err = rdr.Close()
		return nil, fmt.Errorf("read object header: %w", err)
	}
	if prm.headerCallback != nil {
		prm.headerCallback(&hdr)
	}

	_, err = io.Copy(prm.wrt, rdr)
	if err != nil {
		return nil, fmt.Errorf("copy payload: %w", err)
	}

	return &GetObjectRes{
		hdr: &hdr,
	}, nil
}

// HeadObjectPrm groups parameters of HeadObject operation.
type HeadObjectPrm struct {
	commonObjectPrm
	objectAddressPrm
	rawPrm

	mainOnly bool
}

// SetMainOnlyFlag sets flag to get only main fields of an object header in terms of FrostFS API.
func (x *HeadObjectPrm) SetMainOnlyFlag(v bool) {
	x.mainOnly = v
}

// HeadObjectRes groups the resulting values of HeadObject operation.
type HeadObjectRes struct {
	hdr *objectSDK.Object
}

// Header returns the requested object header.
func (x HeadObjectRes) Header() *objectSDK.Object {
	return x.hdr
}

// HeadObject reads an object header by address.
//
// Returns any error which prevented the operation from completing correctly in error return.
// For raw reading, returns *object.SplitInfoError error if object is virtual.
func HeadObject(ctx context.Context, prm HeadObjectPrm) (*HeadObjectRes, error) {
	cnr := prm.objAddr.Container()
	obj := prm.objAddr.Object()

	headPrm := client.PrmObjectHead{
		XHeaders:    prm.xHeaders,
		BearerToken: prm.bearerToken,
		Session:     prm.sessionToken,
		Raw:         prm.raw,
		Local:       prm.local,
		ContainerID: &cnr,
		ObjectID:    &obj,
	}

	res, err := prm.cli.ObjectHead(ctx, headPrm)
	if err != nil {
		return nil, fmt.Errorf("read object header via client: %w", err)
	}

	var hdr objectSDK.Object

	if !res.ReadHeader(&hdr) {
		return nil, errMissingHeaderInResponse
	}

	return &HeadObjectRes{
		hdr: &hdr,
	}, nil
}

// SearchObjectsPrm groups parameters of SearchObjects operation.
type SearchObjectsPrm struct {
	commonObjectPrm
	containerIDPrm

	filters objectSDK.SearchFilters
}

// SetFilters sets search filters.
func (x *SearchObjectsPrm) SetFilters(filters objectSDK.SearchFilters) {
	x.filters = filters
}

// SearchObjectsRes groups the resulting values of SearchObjects operation.
type SearchObjectsRes struct {
	ids []oid.ID
}

// IDList returns identifiers of the matched objects.
func (x SearchObjectsRes) IDList() []oid.ID {
	return x.ids
}

// SearchObjects selects objects from the container which match the filters.
//
// Returns any error which prevented the operation from completing correctly in error return.
func SearchObjects(ctx context.Context, prm SearchObjectsPrm) (*SearchObjectsRes, error) {
	cliPrm := client.PrmObjectSearch{
		XHeaders:    prm.xHeaders,
		Local:       prm.local,
		BearerToken: prm.bearerToken,
		Session:     prm.sessionToken,
		ContainerID: &prm.cnrID,
		Filters:     prm.filters,
	}

	rdr, err := prm.cli.ObjectSearchInit(ctx, cliPrm)
	if err != nil {
		return nil, fmt.Errorf("init object search: %w", err)
	}

	buf := make([]oid.ID, 10)
	var list []oid.ID
	var n int
	var ok bool

	for {
		n, ok = rdr.Read(buf)
		for i := range n {
			list = append(list, buf[i])
		}
		if !ok {
			break
		}
	}

	_, err = rdr.Close()
	if err != nil {
		return nil, fmt.Errorf("read object list: %w", err)
	}

	sort.Slice(list, func(i, j int) bool {
		lhs, rhs := list[i].EncodeToString(), list[j].EncodeToString()
		return strings.Compare(lhs, rhs) < 0
	})

	return &SearchObjectsRes{
		ids: list,
	}, nil
}

// HashPayloadRangesPrm groups parameters of HashPayloadRanges operation.
type HashPayloadRangesPrm struct {
	commonObjectPrm
	objectAddressPrm

	tz bool

	rngs []objectSDK.Range

	salt []byte
}

// TZ sets flag to request Tillich-Zemor hashes.
func (x *HashPayloadRangesPrm) TZ() {
	x.tz = true
}

// SetRanges sets a list of payload ranges to hash.
func (x *HashPayloadRangesPrm) SetRanges(rngs []objectSDK.Range) {
	x.rngs = rngs
}

// SetSalt sets data for each range to be XOR'ed with.
func (x *HashPayloadRangesPrm) SetSalt(salt []byte) {
	x.salt = salt
}

// HashPayloadRangesRes groups the resulting values of HashPayloadRanges operation.
type HashPayloadRangesRes struct {
	cliRes *client.ResObjectHash
}

// HashList returns a list of hashes of the payload ranges keeping order.
func (x HashPayloadRangesRes) HashList() [][]byte {
	return x.cliRes.Checksums()
}

// HashPayloadRanges requests hashes (by default SHA256) of the object payload ranges.
//
// Returns any error which prevented the operation from completing correctly in error return.
// Returns an error if number of received hashes differs with the number of requested ranges.
func HashPayloadRanges(ctx context.Context, prm HashPayloadRangesPrm) (*HashPayloadRangesRes, error) {
	cs := checksum.SHA256
	if prm.tz {
		cs = checksum.TZ
	}

	cnr := prm.objAddr.Container()
	obj := prm.objAddr.Object()
	cliPrm := client.PrmObjectHash{
		ContainerID:  &cnr,
		ObjectID:     &obj,
		Local:        prm.local,
		Salt:         prm.salt,
		Ranges:       prm.rngs,
		ChecksumType: cs,
		Session:      prm.sessionToken,
		BearerToken:  prm.bearerToken,
		XHeaders:     prm.xHeaders,
	}

	res, err := prm.cli.ObjectHash(ctx, cliPrm)
	if err != nil {
		return nil, fmt.Errorf("read payload hashes via client: %w", err)
	}

	return &HashPayloadRangesRes{
		cliRes: res,
	}, nil
}

// PayloadRangePrm groups parameters of PayloadRange operation.
type PayloadRangePrm struct {
	commonObjectPrm
	objectAddressPrm
	rawPrm
	payloadWriterPrm

	rng *objectSDK.Range
}

// SetRange sets payload range to read.
func (x *PayloadRangePrm) SetRange(rng *objectSDK.Range) {
	x.rng = rng
}

// PayloadRangeRes groups the resulting values of PayloadRange operation.
type PayloadRangeRes struct{}

// PayloadRange reads object payload range from FrostFS and writes it to the specified writer.
//
// Interrupts on any writer error.
//
// Returns any error which prevented the operation from completing correctly in error return.
// For raw reading, returns *object.SplitInfoError error if object is virtual.
func PayloadRange(ctx context.Context, prm PayloadRangePrm) (*PayloadRangeRes, error) {
	cnr := prm.objAddr.Container()
	obj := prm.objAddr.Object()

	rangePrm := client.PrmObjectRange{
		XHeaders:    prm.xHeaders,
		BearerToken: prm.bearerToken,
		Session:     prm.sessionToken,
		Raw:         prm.raw,
		Local:       prm.local,
		ContainerID: &cnr,
		ObjectID:    &obj,
		Offset:      prm.rng.GetOffset(),
		Length:      prm.rng.GetLength(),
	}

	rdr, err := prm.cli.ObjectRangeInit(ctx, rangePrm)
	if err != nil {
		return nil, fmt.Errorf("init payload reading: %w", err)
	}

	_, err = io.Copy(prm.wrt, rdr)
	if err != nil {
		return nil, fmt.Errorf("copy payload: %w", err)
	}

	return new(PayloadRangeRes), nil
}

// SyncContainerPrm groups parameters of SyncContainerSettings operation.
type SyncContainerPrm struct {
	commonPrm
	c *containerSDK.Container
}

// SetContainer sets a container that is required to be synced.
func (s *SyncContainerPrm) SetContainer(c *containerSDK.Container) {
	s.c = c
}

// SyncContainerRes groups resulting values of SyncContainerSettings
// operation.
type SyncContainerRes struct{}

// SyncContainerSettings reads global network config from FrostFS and
// syncs container settings with it.
//
// Interrupts on any writer error.
//
// Panics if a container passed as a parameter is nil.
func SyncContainerSettings(ctx context.Context, prm SyncContainerPrm) (*SyncContainerRes, error) {
	if prm.c == nil {
		panic("sync container settings with the network: nil container")
	}

	err := client.SyncContainerWithNetwork(ctx, prm.c, prm.cli)
	if err != nil {
		return nil, err
	}

	return new(SyncContainerRes), nil
}

// PatchObjectPrm groups parameters of PatchObject operation.
type PatchObjectPrm struct {
	commonObjectPrm
	objectAddressPrm

	NewAttributes []objectSDK.Attribute

	ReplaceAttribute bool

	PayloadPatches []PayloadPatch
}

type PayloadPatch struct {
	Range objectSDK.Range

	PayloadPath string
}

type PatchRes struct {
	OID oid.ID
}

func Patch(ctx context.Context, prm PatchObjectPrm) (*PatchRes, error) {
	patchPrm := client.PrmObjectPatch{
		XHeaders:    prm.xHeaders,
		BearerToken: prm.bearerToken,
		Session:     prm.sessionToken,
		Address:     prm.objAddr,
	}

	slices.SortFunc(prm.PayloadPatches, func(a, b PayloadPatch) int {
		return cmp.Compare(a.Range.GetOffset(), b.Range.GetOffset())
	})

	patcher, err := prm.cli.ObjectPatchInit(ctx, patchPrm)
	if err != nil {
		return nil, fmt.Errorf("init payload reading: %w", err)
	}

	if patcher.PatchAttributes(ctx, prm.NewAttributes, prm.ReplaceAttribute) {
		for _, pp := range prm.PayloadPatches {
			payloadFile, err := os.OpenFile(pp.PayloadPath, os.O_RDONLY, os.ModePerm)
			if err != nil {
				return nil, err
			}
			applied := patcher.PatchPayload(ctx, &pp.Range, payloadFile)
			_ = payloadFile.Close()
			if !applied {
				break
			}
		}
	}

	res, err := patcher.Close(ctx)
	if err != nil {
		return nil, err
	}
	return &PatchRes{
		OID: res.ObjectID(),
	}, nil
}