tiny-rdm/backend/services/browser_service.go

package services

import (
	"context"
	"encoding/csv"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"github.com/redis/go-redis/v9"
	"github.com/wailsapp/wails/v2/pkg/runtime"
	"math"
	"net/url"
	"os"
	"slices"
	"sort"
	"strconv"
	"strings"
	"sync"
	"sync/atomic"
	"time"
	"tinyrdm/backend/consts"
	"tinyrdm/backend/types"
	"tinyrdm/backend/utils/coll"
	convutil "tinyrdm/backend/utils/convert"
	maputil "tinyrdm/backend/utils/map"
	redis2 "tinyrdm/backend/utils/redis"
	sliceutil "tinyrdm/backend/utils/slice"
	strutil "tinyrdm/backend/utils/string"
)

type slowLogItem struct {
	Timestamp int64  `json:"timestamp"`
	Client    string `json:"client"`
	Addr      string `json:"addr"`
	Cmd       string `json:"cmd"`
	Cost      int64  `json:"cost"`
}

type entryCursor struct {
	DB      int
	Type    string
	Key     string
	Pattern string
	Cursor  uint64
	XLast   string // last stream pos
}

type connectionItem struct {
	client      redis.UniversalClient
	ctx         context.Context
	cancelFunc  context.CancelFunc
	cursor      map[int]uint64      // current cursor of databases
	entryCursor map[int]entryCursor // current entry cursor of databases
	stepSize    int64
	db          int // current database index
}

type browserService struct {
	ctx        context.Context
	connMap    map[string]*connectionItem
	cmdHistory []cmdHistoryItem
	mutex      sync.Mutex
}

var browser *browserService
var onceBrowser sync.Once

func Browser() *browserService {
	if browser == nil {
		onceBrowser.Do(func() {
			browser = &browserService{
				connMap: map[string]*connectionItem{},
			}
		})
	}
	return browser
}

func (b *browserService) Start(ctx context.Context) {
	b.ctx = ctx
}

func (b *browserService) Stop() {
	for _, item := range b.connMap {
		if item.client != nil {
			if item.cancelFunc != nil {
				item.cancelFunc()
			}
			item.client.Close()
		}
	}
	b.connMap = map[string]*connectionItem{}
}

// OpenConnection open redis server connection
func (b *browserService) OpenConnection(name string) (resp types.JSResp) {
	// get connection config
	selConn := Connection().getConnection(name)
	// correct last database index
	lastDB := selConn.LastDB
	if selConn.DBFilterType == "show" && !slices.Contains(selConn.DBFilterList, lastDB) {
		lastDB = selConn.DBFilterList[0]
	} else if selConn.DBFilterType == "hide" && slices.Contains(selConn.DBFilterList, lastDB) {
		lastDB = selConn.DBFilterList[0]
	}
	if lastDB != selConn.LastDB {
		Connection().SaveLastDB(name, lastDB)
	}

	item, err := b.getRedisClient(name, lastDB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	var totaldb int
	if selConn.DBFilterType == "" || selConn.DBFilterType == "none" {
		// get total databases
		if config, err := client.ConfigGet(ctx, "databases").Result(); err == nil {
			if total, err := strconv.Atoi(config["databases"]); err == nil {
				totaldb = total
			}
		}
	}

	// parse all db, response content like below
	var dbs []types.ConnectionDB
	var clusterKeyCount int64
	cluster, isCluster := client.(*redis.ClusterClient)
	if isCluster {
		var keyCount atomic.Int64
		err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			if size, serr := cli.DBSize(ctx).Result(); serr != nil {
				return serr
			} else {
				keyCount.Add(size)
			}
			return nil
		})
		if err != nil {
			resp.Msg = "get db size error:" + err.Error()
			return
		}
		clusterKeyCount = keyCount.Load()

		// only one database in cluster mode
		dbs = []types.ConnectionDB{
			{
				Name:    "db0",
				Index:   0,
				MaxKeys: int(clusterKeyCount),
			},
		}
	} else {
		// get database info
		var res string
		info := map[string]map[string]string{}
		if res, err = client.Info(ctx, "keyspace").Result(); err != nil {
			//resp.Msg = "get server info fail:" + err.Error()
			//return
		} else {
			info = b.parseInfo(res)
		}

		if totaldb <= 0 {
			// cannot retrieve the database count by "CONFIG GET databases", try to get max index from keyspace
			keyspace := info["Keyspace"]
			var db, maxDB int
			for dbName := range keyspace {
				if db, err = strconv.Atoi(strings.TrimLeft(dbName, "db")); err == nil {
					if maxDB < db {
						maxDB = db
					}
				}
			}
			totaldb = maxDB + 1
		}

		queryDB := func(idx int) types.ConnectionDB {
			dbName := "db" + strconv.Itoa(idx)
			dbInfoStr := info["Keyspace"][dbName]
			var alias string
			if selConn.Alias != nil {
				alias = selConn.Alias[idx]
			}
			if len(dbInfoStr) > 0 {
				dbInfo := b.parseDBItemInfo(dbInfoStr)
				return types.ConnectionDB{
					Name:    dbName,
					Alias:   alias,
					Index:   idx,
					MaxKeys: dbInfo["keys"],
					Expires: dbInfo["expires"],
					AvgTTL:  dbInfo["avg_ttl"],
				}
			} else {
				return types.ConnectionDB{
					Name:  dbName,
					Alias: alias,
					Index: idx,
				}
			}
		}

		switch selConn.DBFilterType {
		case "show":
			filterList := sliceutil.Unique(selConn.DBFilterList)
			for _, idx := range filterList {
				dbs = append(dbs, queryDB(idx))
			}
		case "hide":
			hiddenList := coll.NewSet(selConn.DBFilterList...)
			for idx := 0; idx < totaldb; idx++ {
				if !hiddenList.Contains(idx) {
					dbs = append(dbs, queryDB(idx))
				}
			}
		default:
			for idx := 0; idx < totaldb; idx++ {
				dbs = append(dbs, queryDB(idx))
			}
		}
	}

	// get redis server version
	var version string
	if res, err := client.Info(ctx, "server").Result(); err == nil || errors.Is(err, redis.Nil) {
		info := b.parseInfo(res)
		serverInfo := maputil.Get(info, "Server", map[string]string{})
		version = maputil.Get(serverInfo, "redis_version", "1.0.0")
	}

	resp.Success = true
	resp.Data = map[string]any{
		"db":      dbs,
		"view":    selConn.KeyView,
		"lastDB":  selConn.LastDB,
		"version": version,
	}
	return
}

// CloseConnection close redis server connection
func (b *browserService) CloseConnection(name string) (resp types.JSResp) {
	if item, ok := b.connMap[name]; ok {
		delete(b.connMap, name)
		if item.cancelFunc != nil {
			item.cancelFunc()
		}
		if item.client != nil {
			item.client.Close()
		}
	}
	resp.Success = true
	return
}

func (b *browserService) createRedisClient(ctx context.Context, selConn types.ConnectionConfig) (client redis.UniversalClient, err error) {
	hook := redis2.NewHook(selConn.Name, func(cmd string, cost int64) {
		now := time.Now()
		//last := strings.LastIndex(cmd, ":")
		//if last != -1 {
		//	cmd = cmd[:last]
		//}
		b.cmdHistory = append(b.cmdHistory, cmdHistoryItem{
			Timestamp: now.UnixMilli(),
			Server:    selConn.Name,
			Cmd:       cmd,
			Cost:      cost,
		})
	})

	client, err = Connection().createRedisClient(selConn)
	if err != nil {
		err = fmt.Errorf("create conenction error: %s", err.Error())
		return
	}

	_ = client.Do(ctx, "CLIENT", "SETNAME", url.QueryEscape(selConn.Name)).Err()
	// add hook to each node in cluster mode
	if cluster, ok := client.(*redis.ClusterClient); ok {
		err = cluster.ForEachShard(ctx, func(ctx context.Context, cli *redis.Client) error {
			cli.AddHook(hook)
			return nil
		})
		if err != nil {
			err = fmt.Errorf("get cluster nodes error: %s", err.Error())
			return
		}
	} else {
		client.AddHook(hook)
	}

	if _, err = client.Ping(ctx).Result(); err != nil && !errors.Is(err, redis.Nil) {
		err = errors.New("can not connect to redis server:" + err.Error())
		return
	}
	return
}

// get a redis client from local cache or create a new one
// if db >= 0, it will also switch to target database index
func (b *browserService) getRedisClient(server string, db int) (item *connectionItem, err error) {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	var ok bool
	var client redis.UniversalClient
	if item, ok = b.connMap[server]; ok {
		if item.db == db || db < 0 {
			// return without switch database directly
			return
		}

		// close previous connection if database is not the same
		if item.cancelFunc != nil {
			item.cancelFunc()
		}
		item.client.Close()
		delete(b.connMap, server)
	}

	// recreate new connection after switch database
	selConn := Connection().getConnection(server)
	if selConn == nil {
		err = fmt.Errorf("no match connection \"%s\"", server)
		delete(b.connMap, server)
		return
	}

	ctx, cancelFunc := context.WithCancel(b.ctx)
	b.connMap[server] = &connectionItem{
		ctx:        ctx,
		cancelFunc: cancelFunc,
	}
	var connConfig = selConn.ConnectionConfig
	connConfig.LastDB = db
	client, err = b.createRedisClient(ctx, connConfig)
	if err != nil {
		delete(b.connMap, server)
		return
	}
	item = &connectionItem{
		client:      client,
		ctx:         ctx,
		cancelFunc:  cancelFunc,
		cursor:      map[int]uint64{},
		entryCursor: map[int]entryCursor{},
		stepSize:    int64(selConn.LoadSize),
		db:          db,
	}
	if item.stepSize <= 0 {
		item.stepSize = consts.DEFAULT_LOAD_SIZE
	}
	b.connMap[server] = item
	return
}

// load current database size
func (b *browserService) loadDBSize(ctx context.Context, client redis.UniversalClient) int64 {
	keyCount, _ := client.DBSize(ctx).Result()
	return keyCount
}

// save current scan cursor
func (b *browserService) setClientCursor(server string, db int, cursor uint64) {
	if _, ok := b.connMap[server]; ok {
		if cursor == 0 {
			delete(b.connMap[server].cursor, db)
		} else {
			b.connMap[server].cursor[db] = cursor
		}
	}
}

// parse command response content which use "redis info"
// # Keyspace\r\ndb0:keys=2,expires=1,avg_ttl=1877111749\r\ndb1:keys=33,expires=0,avg_ttl=0\r\ndb3:keys=17,expires=0,avg_ttl=0\r\ndb5:keys=3,expires=0,avg_ttl=0\r\n
func (b *browserService) parseInfo(info string) map[string]map[string]string {
	parsedInfo := map[string]map[string]string{}
	lines := strings.Split(info, "\r\n")
	if len(lines) > 0 {
		var subInfo map[string]string
		for _, line := range lines {
			if strings.HasPrefix(line, "#") {
				subInfo = map[string]string{}
				parsedInfo[strings.TrimSpace(strings.TrimLeft(line, "#"))] = subInfo
			} else {
				items := strings.SplitN(line, ":", 2)
				if len(items) < 2 {
					continue
				}
				subInfo[items[0]] = items[1]
			}
		}
	}
	return parsedInfo
}

// parse db item value, content format like below
// keys=2,expires=1,avg_ttl=1877111749
func (b *browserService) parseDBItemInfo(info string) map[string]int {
	ret := map[string]int{}
	items := strings.Split(info, ",")
	for _, item := range items {
		kv := strings.SplitN(item, "=", 2)
		if len(kv) > 1 {
			ret[kv[0]], _ = strconv.Atoi(kv[1])
		}
	}
	return ret
}

// ServerInfo get server info
func (b *browserService) ServerInfo(name string) (resp types.JSResp) {
	item, err := b.getRedisClient(name, -1)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	// get database info
	res, err := client.Info(ctx).Result()
	if err != nil {
		resp.Msg = "get server info fail:" + err.Error()
		return
	}

	resp.Success = true
	resp.Data = b.parseInfo(res)
	return
}

// OpenDatabase open select database, and list all keys
// @param path contain connection name and db name
func (b *browserService) OpenDatabase(server string, db int) (resp types.JSResp) {
	b.setClientCursor(server, db, 0)

	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	client, ctx := item.client, item.ctx
	maxKeys := b.loadDBSize(ctx, client)

	resp.Success = true
	resp.Data = map[string]any{
		"maxKeys": maxKeys,
	}
	return
}

// scan keys
// @return loaded keys
// @return next cursor
// @return scan error
func (b *browserService) scanKeys(ctx context.Context, client redis.UniversalClient, match, keyType string, cursor uint64) ([]any, uint64, error) {
	var err error
	filterType := len(keyType) > 0
	scanSize := int64(Preferences().GetScanSize())

	// 定义子扫描函数
	scan := func(ctx context.Context, cli *redis.Client, initialCursor uint64, appendFunc func(k []any)) error {
		var loadedKey []string
		cursor := initialCursor // 为每个节点使用独立的游标

		for {
			if filterType {
				loadedKey, cursor, err = cli.ScanType(ctx, cursor, match, scanSize, keyType).Result()
			} else {
				loadedKey, cursor, err = cli.Scan(ctx, cursor, match, scanSize).Result()
			}
			if err != nil {
				return err
			}

			ks := sliceutil.Map(loadedKey, func(i int) any {
				return strutil.EncodeRedisKey(loadedKey[i])
			})

			appendFunc(ks)

			// 如果游标为0，表示扫描完成
			if cursor == 0 {
				break
			}
		}
		return nil
	}

	keys := make([]any, 0)
	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		var mutex sync.Mutex
		var wg sync.WaitGroup

		cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			wg.Add(1)
			go func(cli *redis.Client) {
				defer wg.Done()
				initialCursor := uint64(0) // Each client starts with cursor 0
				err := scan(ctx, cli, initialCursor, func(k []any) {
					mutex.Lock()
					keys = append(keys, k...)
					mutex.Unlock()
				})
				if err != nil {
					//Error handling, such as logging
				}
			}(cli)
			return nil
		})

		wg.Wait() // 等待所有 goroutine 完成
	} else {
		// 非集群模式
		err = scan(ctx, client.(*redis.Client), cursor, func(k []any) {
			keys = append(keys, k...)
		})
	}

	if err != nil {
		return keys, cursor, err
	}
	return keys, cursor, nil
}

// check if key exists
func (b *browserService) existsKey(ctx context.Context, client redis.UniversalClient, key, keyType string) bool {
	var keyExists atomic.Bool
	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			if n := cli.Exists(ctx, key).Val(); n > 0 {
				if len(keyType) <= 0 || strings.ToLower(keyType) == cli.Type(ctx, key).Val() {
					keyExists.Store(true)
				}
			}
			return nil
		})
	} else {
		if n := client.Exists(ctx, key).Val(); n > 0 {
			if len(keyType) <= 0 || strings.ToLower(keyType) == client.Type(ctx, key).Val() {
				keyExists.Store(true)
			}
		}
	}
	return keyExists.Load()
}

// LoadNextKeys load next key from saved cursor
func (b *browserService) LoadNextKeys(server string, db int, match, keyType string, exactMatch bool) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	if match == "*" {
		exactMatch = false
	}

	client, ctx := item.client, item.ctx
	var matchKeys []any
	var maxKeys int64
	cursor := item.cursor[db]
	fullScan := match == "*" || match == ""
	if exactMatch && !fullScan {
		if b.existsKey(ctx, client, match, keyType) {
			matchKeys = []any{match}
			maxKeys = 1
		}
		b.setClientCursor(server, db, 0)
	} else {
		matchKeys, cursor, err = b.scanKeys(ctx, client, match, keyType, cursor)
		if err != nil {
			resp.Msg = err.Error()
			return
		}
		b.setClientCursor(server, db, cursor)
		if fullScan {
			maxKeys = b.loadDBSize(ctx, client)
		} else {
			maxKeys = int64(len(matchKeys))
		}
	}

	resp.Success = true
	resp.Data = map[string]any{
		"keys":    matchKeys,
		"end":     cursor == 0,
		"maxKeys": maxKeys,
	}
	return
}

// LoadNextAllKeys load next all keys
func (b *browserService) LoadNextAllKeys(server string, db int, match, keyType string, exactMatch bool) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	var matchKeys []any
	var maxKeys int64
	fullScan := match == "*" || match == ""
	if exactMatch && !fullScan {
		if b.existsKey(ctx, client, match, keyType) {
			matchKeys = []any{match}
			maxKeys = 1
		}
	} else {
		cursor := item.cursor[db]
		matchKeys, _, err = b.scanKeys(ctx, client, match, keyType, cursor)
		if err != nil {
			resp.Msg = err.Error()
			return
		}
		b.setClientCursor(server, db, 0)
		if fullScan {
			maxKeys = b.loadDBSize(ctx, client)
		} else {
			maxKeys = int64(len(matchKeys))
		}
	}

	resp.Success = true
	resp.Data = map[string]any{
		"keys":    matchKeys,
		"maxKeys": maxKeys,
	}
	return
}

// LoadAllKeys load all keys
func (b *browserService) LoadAllKeys(server string, db int, match, keyType string, exactMatch bool) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	var matchKeys []any
	fullScan := match == "*" || match == ""
	if exactMatch && !fullScan {
		if b.existsKey(ctx, client, match, keyType) {
			matchKeys = []any{match}
		}
	} else {
		matchKeys, _, err = b.scanKeys(ctx, client, match, keyType, 0)
		if err != nil {
			resp.Msg = err.Error()
			return
		}
	}

	resp.Success = true
	resp.Data = map[string]any{
		"keys": matchKeys,
	}
	return
}

func (b *browserService) GetKeyType(param types.KeySummaryParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	var keyType string
	keyType, err = client.Type(ctx, key).Result()
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	if keyType == "none" {
		resp.Msg = "key not exists"
		return
	}

	var data types.KeySummary
	switch keyType {
	case "ReJSON-RL":
		data.Type = "JSON"
	default:
		data.Type = strings.ToLower(keyType)
	}

	resp.Success = true
	resp.Data = data
	return
}

// GetKeySummary get key summary info
func (b *browserService) GetKeySummary(param types.KeySummaryParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)

	pipe := client.Pipeline()
	typeVal := pipe.Type(ctx, key)
	ttlVal := pipe.TTL(ctx, key)
	_, err = pipe.Exec(ctx)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	if typeVal.Err() != nil {
		resp.Msg = typeVal.Err().Error()
		return
	}
	size, _ := client.MemoryUsage(ctx, key, 0).Result()
	data := types.KeySummary{
		Type: typeVal.Val(),
		Size: size,
	}
	if data.Type == "none" {
		resp.Msg = "key not exists"
		return
	}

	if ttlVal.Err() != nil {
		data.TTL = -1
	} else {
		if ttlVal.Val() < 0 {
			data.TTL = -1
		} else {
			data.TTL = int64(ttlVal.Val().Seconds())
		}
	}

	switch data.Type {
	case "string":
		data.Length, err = client.StrLen(ctx, key).Result()
	case "list":
		data.Length, err = client.LLen(ctx, key).Result()
	case "hash":
		data.Length, err = client.HLen(ctx, key).Result()
	case "set":
		data.Length, err = client.SCard(ctx, key).Result()
	case "zset":
		data.Length, err = client.ZCard(ctx, key).Result()
	case "stream":
		data.Length, err = client.XLen(ctx, key).Result()
	case "ReJSON-RL":
		data.Type = "JSON"
		data.Length = 0
	default:
		err = errors.New("unknown key type")
	}

	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = data
	return
}

// GetKeyDetail get key detail
func (b *browserService) GetKeyDetail(param types.KeyDetailParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx, entryCors := item.client, item.ctx, item.entryCursor
	key := strutil.DecodeRedisKey(param.Key)
	var keyType string
	keyType, err = client.Type(ctx, key).Result()
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	if keyType == "none" {
		resp.Msg = "key not exists"
		return
	}
	var doConvert bool
	if (len(param.Decode) > 0 && param.Decode != types.DECODE_NONE) ||
		(len(param.Format) > 0 && param.Format != types.FORMAT_RAW) {
		doConvert = true
	}

	var data types.KeyDetail
	data.KeyType = strings.ToLower(keyType)
	//var cursor uint64
	matchPattern := param.MatchPattern
	if len(matchPattern) <= 0 {
		matchPattern = "*"
	}

	// define get entry cursor function
	getEntryCursor := func() (uint64, string, bool) {
		if entry, ok := entryCors[param.DB]; !ok || entry.Key != key || entry.Pattern != matchPattern {
			// not the same key or match pattern, reset cursor
			entry = entryCursor{
				DB:      param.DB,
				Key:     key,
				Pattern: matchPattern,
				Cursor:  0,
			}
			entryCors[param.DB] = entry
			return 0, "", true
		} else {
			return entry.Cursor, entry.XLast, false
		}
	}
	// define set entry cursor function
	setEntryCursor := func(cursor uint64) {
		entryCors[param.DB] = entryCursor{
			DB:      param.DB,
			Type:    "",
			Key:     key,
			Pattern: matchPattern,
			Cursor:  cursor,
		}
	}
	// define set last stream pos function
	setEntryXLast := func(last string) {
		entryCors[param.DB] = entryCursor{
			DB:      param.DB,
			Type:    "",
			Key:     key,
			Pattern: matchPattern,
			XLast:   last,
		}
	}

	decoder := Preferences().GetDecoder()

	switch data.KeyType {
	case "string":
		var str string
		str, err = client.Get(ctx, key).Result()
		data.Value = strutil.EncodeRedisKey(str)
		//data.Value, data.Decode, data.Format = convutil.ConvertTo(str, param.Decode, param.Format, decoder)

	case "list":
		loadListHandle := func() ([]types.ListEntryItem, bool, bool, error) {
			var loadVal []string
			var cursor uint64
			var reset bool
			var subErr error
			doFilter := matchPattern != "*"
			if param.Full || doFilter {
				// load all
				cursor, reset = 0, true
				loadVal, subErr = client.LRange(ctx, key, 0, -1).Result()
			} else {
				if param.Reset {
					cursor, reset = 0, true
				} else {
					cursor, _, reset = getEntryCursor()
				}
				scanSize := int64(Preferences().GetScanSize())
				loadVal, subErr = client.LRange(ctx, key, int64(cursor), int64(cursor)+scanSize-1).Result()
				cursor = cursor + uint64(scanSize)
				if len(loadVal) < int(scanSize) {
					cursor = 0
				}
			}
			setEntryCursor(cursor)

			items := make([]types.ListEntryItem, 0, len(loadVal))
			for _, val := range loadVal {
				if doFilter && !strings.Contains(val, param.MatchPattern) {
					continue
				}
				items = append(items, types.ListEntryItem{
					Value: val,
				})
				if doConvert {
					if dv, _, _ := convutil.ConvertTo(val, param.Decode, param.Format, decoder); dv != val {
						items[len(items)-1].DisplayValue = dv
					}
				}
			}
			if subErr != nil {
				return items, reset, false, subErr
			}
			return items, reset, cursor == 0, nil
		}

		data.Value, data.Reset, data.End, err = loadListHandle()
		data.Match, data.Decode, data.Format = param.MatchPattern, param.Decode, param.Format
		if err != nil {
			resp.Msg = err.Error()
			return
		}

	case "hash":
		if !strings.HasPrefix(matchPattern, "*") {
			matchPattern = "*" + matchPattern
		}
		if !strings.HasSuffix(matchPattern, "*") {
			matchPattern = matchPattern + "*"
		}
		loadHashHandle := func() ([]types.HashEntryItem, bool, bool, error) {
			var items []types.HashEntryItem
			var loadedVal []string
			var cursor uint64
			var reset bool
			var subErr error
			scanSize := int64(Preferences().GetScanSize())
			if param.Full || matchPattern != "*" {
				// load all
				cursor, reset = 0, true
				items = []types.HashEntryItem{}
				for {
					loadedVal, cursor, subErr = client.HScan(ctx, key, cursor, matchPattern, scanSize).Result()
					if subErr != nil {
						return nil, reset, false, subErr
					}
					for i := 0; i < len(loadedVal); i += 2 {
						items = append(items, types.HashEntryItem{
							Key:   loadedVal[i],
							Value: strutil.EncodeRedisKey(loadedVal[i+1]),
						})
						if doConvert {
							if dv, _, _ := convutil.ConvertTo(loadedVal[i+1], param.Decode, param.Format, decoder); dv != loadedVal[i+1] {
								items[len(items)-1].DisplayValue = dv
							}
						}
					}
					if cursor == 0 {
						break
					}
				}
			} else {
				if param.Reset {
					cursor, reset = 0, true
				} else {
					cursor, _, reset = getEntryCursor()
				}
				loadedVal, cursor, subErr = client.HScan(ctx, key, cursor, matchPattern, scanSize).Result()
				if subErr != nil {
					return nil, reset, false, subErr
				}
				loadedLen := len(loadedVal)
				items = make([]types.HashEntryItem, loadedLen/2)
				for i := 0; i < loadedLen; i += 2 {
					items[i/2].Key = loadedVal[i]
					items[i/2].Value = strutil.EncodeRedisKey(loadedVal[i+1])
					if doConvert {
						if dv, _, _ := convutil.ConvertTo(loadedVal[i+1], param.Decode, param.Format, decoder); dv != loadedVal[i+1] {
							items[i/2].DisplayValue = dv
						}
					}
				}
			}
			setEntryCursor(cursor)
			return items, reset, cursor == 0, nil
		}

		data.Value, data.Reset, data.End, err = loadHashHandle()
		data.Match, data.Decode, data.Format = param.MatchPattern, param.Decode, param.Format
		if err != nil {
			resp.Msg = err.Error()
			return
		}

	case "set":
		if !strings.HasPrefix(matchPattern, "*") {
			matchPattern = "*" + matchPattern
		}
		if !strings.HasSuffix(matchPattern, "*") {
			matchPattern = matchPattern + "*"
		}
		loadSetHandle := func() ([]types.SetEntryItem, bool, bool, error) {
			var items []types.SetEntryItem
			var cursor uint64
			var reset bool
			var subErr error
			var loadedKey []string
			scanSize := int64(Preferences().GetScanSize())
			if param.Full || matchPattern != "*" {
				// load all
				cursor, reset = 0, true
				items = []types.SetEntryItem{}
				for {
					loadedKey, cursor, subErr = client.SScan(ctx, key, cursor, matchPattern, scanSize).Result()
					if subErr != nil {
						return items, reset, false, subErr
					}
					for _, val := range loadedKey {
						items = append(items, types.SetEntryItem{
							Value: val,
						})
						if doConvert {
							if dv, _, _ := convutil.ConvertTo(val, param.Decode, param.Format, decoder); dv != val {
								items[len(items)-1].DisplayValue = dv
							}
						}
					}
					if cursor == 0 {
						break
					}
				}
			} else {
				if param.Reset {
					cursor, reset = 0, true
				} else {
					cursor, _, reset = getEntryCursor()
				}
				loadedKey, cursor, subErr = client.SScan(ctx, key, cursor, matchPattern, scanSize).Result()
				items = make([]types.SetEntryItem, len(loadedKey))
				for i, val := range loadedKey {
					items[i].Value = val
					if doConvert {
						if dv, _, _ := convutil.ConvertTo(val, param.Decode, param.Format, decoder); dv != val {
							items[i].DisplayValue = dv
						}
					}
				}
			}
			setEntryCursor(cursor)
			return items, reset, cursor == 0, nil
		}

		data.Value, data.Reset, data.End, err = loadSetHandle()
		data.Match, data.Decode, data.Format = param.MatchPattern, param.Decode, param.Format
		if err != nil {
			resp.Msg = err.Error()
			return
		}

	case "zset":
		if !strings.HasPrefix(matchPattern, "*") {
			matchPattern = "*" + matchPattern
		}
		if !strings.HasSuffix(matchPattern, "*") {
			matchPattern = matchPattern + "*"
		}
		loadZSetHandle := func() ([]types.ZSetEntryItem, bool, bool, error) {
			var items []types.ZSetEntryItem
			var reset bool
			var cursor uint64
			scanSize := int64(Preferences().GetScanSize())
			doFilter := matchPattern != "*"
			if param.Full || doFilter {
				// load all
				var loadedVal []string
				cursor, reset = 0, true
				items = []types.ZSetEntryItem{}
				for {
					loadedVal, cursor, err = client.ZScan(ctx, key, cursor, matchPattern, scanSize).Result()
					if err != nil {
						return items, reset, false, err
					}
					var score float64
					for i := 0; i < len(loadedVal); i += 2 {
						if score, err = strconv.ParseFloat(loadedVal[i+1], 64); err == nil {
							items = append(items, types.ZSetEntryItem{
								Value: loadedVal[i],
								Score: score,
							})
							if doConvert {
								if dv, _, _ := convutil.ConvertTo(loadedVal[i], param.Decode, param.Format, decoder); dv != loadedVal[i] {
									items[len(items)-1].DisplayValue = dv
								}
							}
						}
					}
					if cursor == 0 {
						break
					}
				}
			} else {
				if param.Reset {
					cursor, reset = 0, true
				} else {
					cursor, _, reset = getEntryCursor()
				}
				var loadedVal []redis.Z
				loadedVal, err = client.ZRangeWithScores(ctx, key, int64(cursor), int64(cursor)+scanSize-1).Result()
				cursor = cursor + uint64(scanSize)
				if len(loadedVal) < int(scanSize) {
					cursor = 0
				}

				items = make([]types.ZSetEntryItem, 0, len(loadedVal))
				for _, z := range loadedVal {
					val := strutil.AnyToString(z.Member, "", 0)
					if doFilter && !strings.Contains(val, param.MatchPattern) {
						continue
					}
					entry := types.ZSetEntryItem{
						Value: val,
					}
					if math.IsInf(z.Score, 1) {
						entry.ScoreStr = "+inf"
					} else if math.IsInf(z.Score, -1) {
						entry.ScoreStr = "-inf"
					} else {
						entry.Score = z.Score
					}
					items = append(items, entry)
					if doConvert {
						if dv, _, _ := convutil.ConvertTo(val, param.Decode, param.Format, decoder); dv != val {
							items[len(items)-1].DisplayValue = dv
						}
					}
				}
			}
			setEntryCursor(cursor)
			return items, reset, cursor == 0, nil
		}

		data.Value, data.Reset, data.End, err = loadZSetHandle()
		data.Match, data.Decode, data.Format = param.MatchPattern, param.Decode, param.Format
		if err != nil {
			resp.Msg = err.Error()
			return
		}

	case "stream":
		loadStreamHandle := func() ([]types.StreamEntryItem, bool, bool, error) {
			var msgs []redis.XMessage
			var last string
			var reset bool
			doFilter := matchPattern != "*"
			if param.Full || doFilter {
				// load all
				last, reset = "", true
				msgs, err = client.XRevRange(ctx, key, "+", "-").Result()
			} else {
				scanSize := int64(Preferences().GetScanSize())
				if param.Reset {
					last = ""
				} else {
					_, last, reset = getEntryCursor()
				}
				if len(last) <= 0 {
					last = "+"
				}
				if last != "+" {
					// add 1 more item when continue scan
					msgs, err = client.XRevRangeN(ctx, key, last, "-", scanSize+1).Result()
					msgs = msgs[1:]
				} else {
					msgs, err = client.XRevRangeN(ctx, key, last, "-", scanSize).Result()
				}
				scanCount := len(msgs)
				if scanCount <= 0 || scanCount < int(scanSize) {
					last = ""
				} else if scanCount > 0 {
					last = msgs[scanCount-1].ID
				}
			}
			setEntryXLast(last)
			items := make([]types.StreamEntryItem, 0, len(msgs))
			for _, msg := range msgs {
				it := types.StreamEntryItem{
					ID:    msg.ID,
					Value: msg.Values,
				}
				if vb, merr := json.Marshal(msg.Values); merr != nil {
					it.DisplayValue = "{}"
				} else {
					it.DisplayValue, _, _ = convutil.ConvertTo(string(vb), types.DECODE_NONE, types.FORMAT_JSON, decoder)
				}
				if doFilter && !strings.Contains(it.DisplayValue, param.MatchPattern) {
					continue
				}
				items = append(items, it)
			}
			if err != nil {
				return items, reset, false, err
			}
			return items, reset, last == "", nil
		}

		data.Value, data.Reset, data.End, err = loadStreamHandle()
		data.Match, data.Decode, data.Format = param.MatchPattern, param.Decode, param.Format
		if err != nil {
			resp.Msg = err.Error()
			return
		}

	case "rejson-rl":
		var jsonStr string
		data.KeyType = "JSON"
		jsonStr, err = client.JSONGet(ctx, key).Result()
		data.Value, data.Decode, data.Format = convutil.ConvertTo(jsonStr, types.DECODE_NONE, types.FORMAT_JSON, nil)
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	resp.Success = true
	resp.Data = data
	return
}

// ConvertValue convert value with decode method and format
// blank decode indicate auto decode
// blank format indicate auto format
func (b *browserService) ConvertValue(value any, decode, format string) (resp types.JSResp) {
	str := strutil.DecodeRedisKey(value)
	value, decode, format = convutil.ConvertTo(str, decode, format, Preferences().GetDecoder())
	resp.Success = true
	resp.Data = map[string]any{
		"value":  value,
		"decode": decode,
		"format": format,
	}
	return
}

// SetKeyValue set value by key
// @param ttl <= 0 means keep current ttl
func (b *browserService) SetKeyValue(param types.SetKeyParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	var expiration time.Duration
	if param.TTL < 0 {
		if expiration, err = client.PTTL(ctx, key).Result(); err != nil {
			expiration = redis.KeepTTL
		}
	} else {
		expiration = time.Duration(param.TTL) * time.Second
	}
	// use default decode type and format
	if len(param.Decode) <= 0 {
		param.Decode = types.DECODE_NONE
	}
	if len(param.Format) <= 0 {
		param.Format = types.FORMAT_RAW
	}
	var savedValue any
	switch strings.ToLower(param.KeyType) {
	case "string":
		if str, ok := param.Value.(string); !ok {
			resp.Msg = "invalid string value"
			return
		} else {
			if savedValue, err = convutil.SaveAs(str, param.Format, param.Decode, Preferences().GetDecoder()); err != nil {
				resp.Msg = fmt.Sprintf(`save to type "%s" fail: %s`, param.Format, err.Error())
				return
			}
			_, err = client.Set(ctx, key, savedValue, 0).Result()
			// set expiration lonely, not "keepttl"
			if err == nil && expiration > 0 {
				client.Expire(ctx, key, expiration)
			}
		}
	case "list":
		if strs, ok := param.Value.([]any); !ok {
			resp.Msg = "invalid list value"
			return
		} else {
			err = client.LPush(ctx, key, strs...).Err()
			if err == nil && expiration > 0 {
				client.Expire(ctx, key, expiration)
			}
		}
	case "hash":
		if strs, ok := param.Value.([]any); !ok {
			resp.Msg = "invalid hash value"
			return
		} else {
			total := len(strs)
			if total > 1 {
				_, err = client.Pipelined(ctx, func(pipe redis.Pipeliner) error {
					for i := 0; i < total; i += 2 {
						pipe.HSet(ctx, key, strs[i], strs[i+1])
					}
					if expiration > 0 {
						pipe.Expire(ctx, key, expiration)
					}
					return nil
				})
			}
		}
	case "set":
		if strs, ok := param.Value.([]any); !ok || len(strs) <= 0 {
			resp.Msg = "invalid set value"
			return
		} else {
			if len(strs) > 0 {
				err = client.SAdd(ctx, key, strs...).Err()
				if err == nil && expiration > 0 {
					client.Expire(ctx, key, expiration)
				}
			}
		}
	case "zset":
		if strs, ok := param.Value.([]any); !ok || len(strs) <= 0 {
			resp.Msg = "invalid zset value"
			return
		} else {
			if len(strs) > 1 {
				var members []redis.Z
				for i := 0; i < len(strs); i += 2 {
					score, _ := strconv.ParseFloat(strs[i+1].(string), 64)
					members = append(members, redis.Z{
						Score:  score,
						Member: strs[i],
					})
				}
				err = client.ZAdd(ctx, key, members...).Err()
				if err == nil && expiration > 0 {
					client.Expire(ctx, key, expiration)
				}
			}
		}
	case "stream":
		if strs, ok := param.Value.([]any); !ok {
			resp.Msg = "invalid stream value"
			return
		} else {
			if len(strs) > 2 {
				err = client.XAdd(ctx, &redis.XAddArgs{
					Stream: key,
					ID:     strs[0].(string),
					Values: strs[1:],
				}).Err()
				if err == nil && expiration > 0 {
					client.Expire(ctx, key, expiration)
				}
			}
		}
	case "json":
		err = client.JSONSet(ctx, key, ".", param.Value).Err()
		if err == nil && expiration > 0 {
			client.Expire(ctx, key, expiration)
		}
		var ok bool
		if savedValue, ok = param.Value.(string); !ok {
			savedValue = ""
		}
	}

	if err != nil {
		resp.Msg = err.Error()
		return
	}
	resp.Success = true
	respData := map[string]any{}
	if val, ok := savedValue.(string); ok {
		respData["value"] = strutil.EncodeRedisKey(val)
	}
	resp.Data = respData
	return
}

// GetHashValue get hash field
func (b *browserService) GetHashValue(param types.GetHashParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	val, err := client.HGet(ctx, key, param.Field).Result()
	if errors.Is(err, redis.Nil) {
		resp.Msg = "field in key not found"
		return
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	var displayVal string
	if (len(param.Decode) > 0 && param.Decode != types.DECODE_NONE) ||
		(len(param.Format) > 0 && param.Format != types.FORMAT_RAW) {
		decoder := Preferences().GetDecoder()
		displayVal, _, _ = convutil.ConvertTo(val, param.Decode, param.Format, decoder)
		if displayVal == val {
			displayVal = ""
		}
	}

	resp.Data = types.HashEntryItem{
		Key:          param.Field,
		Value:        val,
		DisplayValue: displayVal,
	}
	resp.Success = true
	return
}

// SetHashValue update hash field
func (b *browserService) SetHashValue(param types.SetHashParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	str := strutil.DecodeRedisKey(param.Value)
	var saveStr, displayStr string
	decoder := Preferences().GetDecoder()
	if saveStr, err = convutil.SaveAs(str, param.Format, param.Decode, decoder); err != nil {
		resp.Msg = fmt.Sprintf(`save to type "%s" fail: %s`, param.Format, err.Error())
		return
	}
	if len(param.RetDecode) > 0 && len(param.RetFormat) > 0 {
		displayStr, _, _ = convutil.ConvertTo(saveStr, param.RetDecode, param.RetFormat, decoder)
	}
	var updated, added, removed []types.HashEntryItem
	var replaced []types.HashReplaceItem
	var affect int64
	if len(param.NewField) <= 0 {
		// new field is empty, delete old field
		_, err = client.HDel(ctx, key, param.Field).Result()
		removed = append(removed, types.HashEntryItem{
			Key: param.Field,
		})
	} else if len(param.Field) <= 0 || param.Field == param.NewField {
		affect, err = client.HSet(ctx, key, param.NewField, saveStr).Result()
		if affect <= 0 {
			// update field value
			updated = append(updated, types.HashEntryItem{
				Key:          param.NewField,
				Value:        saveStr,
				DisplayValue: displayStr,
			})
		} else {
			// add new field
			added = append(added, types.HashEntryItem{
				Key:          param.NewField,
				Value:        saveStr,
				DisplayValue: displayStr,
			})
		}
	} else {
		// remove old field and add new field
		if _, err = client.HDel(ctx, key, param.Field).Result(); err != nil {
			resp.Msg = err.Error()
			return
		}

		affect, err = client.HSet(ctx, key, param.NewField, saveStr).Result()
		if affect <= 0 {
			// no new filed added, just update exists item
			removed = append(removed, types.HashEntryItem{
				Key: param.Field,
			})
			updated = append(updated, types.HashEntryItem{
				Key:          param.NewField,
				Value:        saveStr,
				DisplayValue: displayStr,
			})
		} else {
			// add new field
			replaced = append(replaced, types.HashReplaceItem{
				Key:          param.Field,
				NewKey:       param.NewField,
				Value:        saveStr,
				DisplayValue: displayStr,
			})
		}
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Added    []types.HashEntryItem   `json:"added,omitempty"`
		Removed  []types.HashEntryItem   `json:"removed,omitempty"`
		Updated  []types.HashEntryItem   `json:"updated,omitempty"`
		Replaced []types.HashReplaceItem `json:"replaced,omitempty"`
	}{
		Added:    added,
		Removed:  removed,
		Updated:  updated,
		Replaced: replaced,
	}
	return
}

// AddHashField add or update hash field
func (b *browserService) AddHashField(server string, db int, k any, action int, fieldItems []any) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	var updated []types.HashEntryItem
	var added []types.HashEntryItem
	switch action {
	case 1:
		// ignore duplicated fields
		for i := 0; i < len(fieldItems); i += 2 {
			field, value := strutil.DecodeRedisKey(fieldItems[i]), strutil.DecodeRedisKey(fieldItems[i+1])
			if succ, _ := client.HSetNX(ctx, key, field, value).Result(); succ {
				added = append(added, types.HashEntryItem{
					Key:          field,
					Value:        value,
					DisplayValue: "", // TODO: convert to display value
				})
			}
		}
	default:
		// overwrite duplicated fields
		total := len(fieldItems)
		if total > 1 {
			for i := 0; i < total; i += 2 {
				field, value := strutil.DecodeRedisKey(fieldItems[i]), strutil.DecodeRedisKey(fieldItems[i+1])
				if affect, _ := client.HSet(ctx, key, field, value).Result(); affect > 0 {
					added = append(added, types.HashEntryItem{
						Key:          field,
						Value:        value,
						DisplayValue: "", // TODO: convert to display value
					})
				} else {
					updated = append(updated, types.HashEntryItem{
						Key:          field,
						Value:        value,
						DisplayValue: "", // TODO: convert to display value
					})
				}
			}
		}
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Added   []types.HashEntryItem `json:"added,omitempty"`
		Updated []types.HashEntryItem `json:"updated,omitempty"`
	}{
		Added:   added,
		Updated: updated,
	}
	return
}

// AddListItem add item to list or remove from it
func (b *browserService) AddListItem(server string, db int, k any, action int, items []any) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	var leftPush, rightPush []types.ListEntryItem
	switch action {
	case 0:
		// push to head
		slices.Reverse(items)
		_, err = client.LPush(ctx, key, items...).Result()
		for i := len(items) - 1; i >= 0; i-- {
			leftPush = append(leftPush, types.ListEntryItem{
				Value:        items[i],
				DisplayValue: "", // TODO: convert to display value
			})
		}
	default:
		// append to tail
		_, err = client.RPush(ctx, key, items...).Result()
		for _, it := range items {
			rightPush = append(rightPush, types.ListEntryItem{
				Value:        it,
				DisplayValue: "", // TODO: convert to display value
			})
		}
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Left  []types.ListEntryItem `json:"left,omitempty"`
		Right []types.ListEntryItem `json:"right,omitempty"`
	}{
		Left:  leftPush,
		Right: rightPush,
	}
	return
}

// SetListItem update or remove list item by index
func (b *browserService) SetListItem(param types.SetListParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	str := strutil.DecodeRedisKey(param.Value)
	var replaced, removed []types.ListReplaceItem
	if len(str) <= 0 {
		// remove from list
		err = client.LSet(ctx, key, param.Index, "---VALUE_REMOVED_BY_TINY_RDM---").Err()
		if err != nil {
			resp.Msg = err.Error()
			return
		}

		err = client.LRem(ctx, key, 1, "---VALUE_REMOVED_BY_TINY_RDM---").Err()
		if err != nil {
			resp.Msg = err.Error()
			return
		}
		removed = append(removed, types.ListReplaceItem{
			Index: param.Index,
		})
	} else {
		// replace index value
		var saveStr string
		decoder := Preferences().GetDecoder()
		if saveStr, err = convutil.SaveAs(str, param.Format, param.Decode, decoder); err != nil {
			resp.Msg = fmt.Sprintf(`save to type "%s" fail: %s`, param.Format, err.Error())
			return
		}
		err = client.LSet(ctx, key, param.Index, saveStr).Err()
		if err != nil {
			resp.Msg = err.Error()
			return
		}
		var displayStr string
		if len(param.RetDecode) > 0 && len(param.RetFormat) > 0 {
			displayStr, _, _ = convutil.ConvertTo(saveStr, param.RetDecode, param.RetFormat, decoder)
		}
		replaced = append(replaced, types.ListReplaceItem{
			Index:        param.Index,
			Value:        saveStr,
			DisplayValue: displayStr,
		})
	}

	resp.Success = true
	resp.Data = struct {
		Removed  []types.ListReplaceItem `json:"removed,omitempty"`
		Replaced []types.ListReplaceItem `json:"replaced,omitempty"`
	}{
		Removed:  removed,
		Replaced: replaced,
	}
	return
}

// SetSetItem add members to set or remove from set
func (b *browserService) SetSetItem(server string, db int, k any, remove bool, members []any) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	var added, removed []types.SetEntryItem
	var affected int64
	if remove {
		for _, member := range members {
			if affected, _ = client.SRem(ctx, key, member).Result(); affected > 0 {
				removed = append(removed, types.SetEntryItem{
					Value: member,
				})
			}
		}
	} else {
		for _, member := range members {
			if affected, _ = client.SAdd(ctx, key, member).Result(); affected > 0 {
				added = append(added, types.SetEntryItem{
					Value:        member,
					DisplayValue: "", // TODO: convert to display value
				})
			}
		}
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Added    []types.SetEntryItem `json:"added,omitempty"`
		Removed  []types.SetEntryItem `json:"removed,omitempty"`
		Affected int64                `json:"affected"`
	}{
		Added:    added,
		Removed:  removed,
		Affected: affected,
	}
	return
}

// UpdateSetItem replace member of set
func (b *browserService) UpdateSetItem(param types.SetSetParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	var added, removed []types.SetEntryItem
	var affect int64
	// remove old value
	str := strutil.DecodeRedisKey(param.Value)
	if affect, _ = client.SRem(ctx, key, str).Result(); affect > 0 {
		removed = append(removed, types.SetEntryItem{
			Value: str,
		})
	}

	// insert new value
	str = strutil.DecodeRedisKey(param.NewValue)
	decoder := Preferences().GetDecoder()
	var saveStr string
	if saveStr, err = convutil.SaveAs(str, param.Format, param.Decode, decoder); err != nil {
		resp.Msg = fmt.Sprintf(`save to type "%s" fail: %s`, param.Format, err.Error())
		return
	}
	if affect, _ = client.SAdd(ctx, key, saveStr).Result(); affect > 0 {
		// add new item
		var displayStr string
		if len(param.RetDecode) > 0 && len(param.RetFormat) > 0 {
			displayStr, _, _ = convutil.ConvertTo(saveStr, param.RetDecode, param.RetFormat, decoder)
		}
		added = append(added, types.SetEntryItem{
			Value:        saveStr,
			DisplayValue: displayStr,
		})
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Added   []types.SetEntryItem `json:"added,omitempty"`
		Removed []types.SetEntryItem `json:"removed,omitempty"`
	}{
		Added:   added,
		Removed: removed,
	}
	return
}

// UpdateZSetValue update value of sorted set member
func (b *browserService) UpdateZSetValue(param types.SetZSetParam) (resp types.JSResp) {
	item, err := b.getRedisClient(param.Server, param.DB)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(param.Key)
	val, newVal := strutil.DecodeRedisKey(param.Value), strutil.DecodeRedisKey(param.NewValue)
	var added, updated, removed []types.ZSetEntryItem
	var replaced []types.ZSetReplaceItem
	var affect int64
	decoder := Preferences().GetDecoder()
	if len(newVal) <= 0 {
		// no new value, delete value
		if affect, err = client.ZRem(ctx, key, val).Result(); affect > 0 {
			//removed = append(removed, val)
			removed = append(removed, types.ZSetEntryItem{
				Value: val,
			})
		}
	} else {
		var saveVal string
		if saveVal, err = convutil.SaveAs(newVal, param.Format, param.Decode, decoder); err != nil {
			resp.Msg = fmt.Sprintf(`save to type "%s" fail: %s`, param.Format, err.Error())
			return
		}

		if saveVal == val {
			affect, err = client.ZAdd(ctx, key, redis.Z{
				Score:  param.Score,
				Member: saveVal,
			}).Result()
			displayValue, _, _ := convutil.ConvertTo(val, param.RetDecode, param.RetFormat, decoder)
			if affect > 0 {
				// add new item
				added = append(added, types.ZSetEntryItem{
					Score:        param.Score,
					Value:        val,
					DisplayValue: displayValue,
				})
			} else {
				// update score only
				updated = append(updated, types.ZSetEntryItem{
					Score:        param.Score,
					Value:        val,
					DisplayValue: displayValue,
				})
			}
		} else {
			// remove old value and add new one
			_, err = client.ZRem(ctx, key, val).Result()
			if err != nil {
				resp.Msg = err.Error()
				return
			}

			affect, err = client.ZAdd(ctx, key, redis.Z{
				Score:  param.Score,
				Member: saveVal,
			}).Result()
			displayValue, _, _ := convutil.ConvertTo(saveVal, param.RetDecode, param.RetFormat, decoder)
			if affect <= 0 {
				// no new value added, just update exists item
				removed = append(removed, types.ZSetEntryItem{
					Value: val,
				})
				updated = append(updated, types.ZSetEntryItem{
					Score:        param.Score,
					Value:        saveVal,
					DisplayValue: displayValue,
				})
			} else {
				// add new field
				replaced = append(replaced, types.ZSetReplaceItem{
					Score:        param.Score,
					Value:        val,
					NewValue:     saveVal,
					DisplayValue: displayValue,
				})
			}
		}
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Added    []types.ZSetEntryItem   `json:"added,omitempty"`
		Updated  []types.ZSetEntryItem   `json:"updated,omitempty"`
		Replaced []types.ZSetReplaceItem `json:"replaced,omitempty"`
		Removed  []types.ZSetEntryItem   `json:"removed,omitempty"`
	}{
		Added:    added,
		Updated:  updated,
		Replaced: replaced,
		Removed:  removed,
	}
	return
}

// AddZSetValue add item to sorted set
func (b *browserService) AddZSetValue(server string, db int, k any, action int, valueScore map[string]float64) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)

	var added, updated []types.ZSetEntryItem
	switch action {
	case 1:
		// ignore duplicated fields
		for m, s := range valueScore {
			if affect, _ := client.ZAddNX(ctx, key, redis.Z{Score: s, Member: m}).Result(); affect > 0 {
				added = append(added, types.ZSetEntryItem{
					Score:        s,
					Value:        m,
					DisplayValue: "", // TODO: convert to display value
				})
			}
		}
	default:
		// overwrite duplicated fields
		for m, s := range valueScore {
			if affect, _ := client.ZAdd(ctx, key, redis.Z{Score: s, Member: m}).Result(); affect > 0 {
				added = append(added, types.ZSetEntryItem{
					Score:        s,
					Value:        m,
					DisplayValue: "", // TODO: convert to display value
				})
			} else {
				updated = append(updated, types.ZSetEntryItem{
					Score:        s,
					Value:        m,
					DisplayValue: "", // TODO: convert to display value
				})
			}
		}
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Added   []types.ZSetEntryItem `json:"added,omitempty"`
		Updated []types.ZSetEntryItem `json:"updated,omitempty"`
	}{
		Added:   added,
		Updated: updated,
	}
	return
}

// AddStreamValue add stream field
func (b *browserService) AddStreamValue(server string, db int, k any, ID string, fieldItems []any) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	var updateID string
	updateID, err = client.XAdd(ctx, &redis.XAddArgs{
		Stream: key,
		ID:     ID,
		Values: fieldItems,
	}).Result()
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	updateValues := make(map[string]any, len(fieldItems)/2)
	for i := 0; i < len(fieldItems)/2; i += 2 {
		updateValues[fieldItems[i].(string)] = fieldItems[i+1]
	}
	vb, _ := json.Marshal(updateValues)
	displayValue, _, _ := convutil.ConvertTo(string(vb), types.DECODE_NONE, types.FORMAT_JSON, Preferences().GetDecoder())

	resp.Success = true
	resp.Data = struct {
		Added []types.StreamEntryItem `json:"added,omitempty"`
	}{
		Added: []types.StreamEntryItem{
			{
				ID:           updateID,
				Value:        updateValues,
				DisplayValue: displayValue, // TODO: convert to display value
			},
		},
	}
	return
}

// RemoveStreamValues remove stream values by id
func (b *browserService) RemoveStreamValues(server string, db int, k any, IDs []string) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)

	var affected int64
	affected, err = client.XDel(ctx, key, IDs...).Result()
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	resp.Data = struct {
		Affected int64 `json:"affected"`
	}{
		Affected: affected,
	}
	return
}

// SetKeyTTL set ttl of key
func (b *browserService) SetKeyTTL(server string, db int, k any, ttl int64) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	if ttl < 0 {
		if err = client.Persist(ctx, key).Err(); err != nil {
			resp.Msg = err.Error()
			return
		}
	} else {
		expiration := time.Duration(ttl) * time.Second
		if err = client.Expire(ctx, key, expiration).Err(); err != nil {
			resp.Msg = err.Error()
			return
		}
	}

	resp.Success = true
	return
}

// BatchSetTTL batch set ttl
func (b *browserService) BatchSetTTL(server string, db int, ks []any, ttl int64, serialNo string) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	client := item.client
	ctx, cancelFunc := context.WithCancel(b.ctx)
	defer cancelFunc()

	//cancelEvent := "ttling:stop:" + serialNo
	//runtime.EventsOnce(ctx, cancelEvent, func(data ...any) {
	//	cancelFunc()
	//})
	//processEvent := "ttling:" + serialNo
	total := len(ks)
	var failed, updated atomic.Int64
	var canceled bool

	expiration := time.Now().Add(time.Duration(ttl) * time.Second)
	del := func(ctx context.Context, cli redis.UniversalClient) error {
		startTime := time.Now().Add(-10 * time.Second)
		for i, k := range ks {
			// emit progress per second
			//param := map[string]any{
			//	"total":      total,
			//	"progress":   i + 1,
			//	"processing": k,
			//}
			if i >= total-1 || time.Now().Sub(startTime).Milliseconds() > 100 {
				startTime = time.Now()
				//runtime.EventsEmit(ctx, processEvent, param)
				// do some sleep to prevent blocking the Redis server
				time.Sleep(10 * time.Millisecond)
			}

			key := strutil.DecodeRedisKey(k)
			var expErr error
			if ttl < 0 {
				expErr = cli.Persist(ctx, key).Err()
			} else {
				expErr = cli.ExpireAt(ctx, key, expiration).Err()
			}
			if err != nil {
				failed.Add(1)
			} else {
				// save deleted key
				updated.Add(1)
			}
			if errors.Is(expErr, context.Canceled) || canceled {
				canceled = true
				break
			}
		}
		return nil
	}

	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			return del(ctx, cli)
		})
	} else {
		err = del(ctx, client)
	}

	//runtime.EventsOff(ctx, cancelEvent)
	resp.Success = true
	resp.Data = struct {
		Canceled bool  `json:"canceled"`
		Updated  int64 `json:"updated"`
		Failed   int64 `json:"failed"`
	}{
		Canceled: canceled,
		Updated:  updated.Load(),
		Failed:   failed.Load(),
	}
	return
}

// DeleteKey remove redis key
func (b *browserService) DeleteKey(server string, db int, k any, async bool) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	var deletedKeys []string
	if strings.HasSuffix(key, "*") {
		// delete by prefix
		var mutex sync.Mutex
		supportUnlink := true
		del := func(ctx context.Context, cli redis.UniversalClient) error {
			handleDel := func(ks []string) error {
				var delErr error
				if async && supportUnlink {
					if delErr = cli.Unlink(ctx, ks...).Err(); delErr != nil {
						supportUnlink = false
						// not support unlink? try del command
						delErr = cli.Del(ctx, ks...).Err()
					}
				} else {
					delErr = cli.Del(ctx, ks...).Err()
				}

				mutex.Lock()
				deletedKeys = append(deletedKeys, ks...)
				mutex.Unlock()

				return delErr
			}

			scanSize := int64(Preferences().GetScanSize())
			iter := cli.Scan(ctx, 0, key, scanSize).Iterator()
			resultKeys := make([]string, 0, 100)
			for iter.Next(ctx) {
				resultKeys = append(resultKeys, iter.Val())
				if len(resultKeys) >= 20 {
					handleDel(resultKeys)
					resultKeys = resultKeys[:0:cap(resultKeys)]
				}
			}

			if len(resultKeys) > 0 {
				handleDel(resultKeys)
			}
			return nil
		}

		if cluster, ok := client.(*redis.ClusterClient); ok {
			// cluster mode
			err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
				return del(ctx, cli)
			})
		} else {
			err = del(ctx, client)
		}

		if err != nil {
			resp.Msg = err.Error()
			return
		}
	} else {
		// delete key only
		if async {
			if err = client.Unlink(ctx, key).Err(); err != nil {
				if err = client.Del(ctx, key).Err(); err != nil {
					resp.Msg = err.Error()
					return
				}
			}
		} else {
			if err = client.Del(ctx, key).Err(); err != nil {
				resp.Msg = err.Error()
				return
			}
		}
		deletedKeys = append(deletedKeys, key)
	}

	resp.Success = true
	resp.Data = map[string]any{
		"deleted":     deletedKeys,
		"deleteCount": len(deletedKeys),
	}
	return
}

// DeleteOneKey delete one key
func (b *browserService) DeleteOneKey(server string, db int, k any) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	key := strutil.DecodeRedisKey(k)
	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			return cli.Del(ctx, key).Err()
		})
	} else {
		err = client.Del(ctx, key).Err()
	}

	if err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	return
}

// DeleteKeys delete keys sync with notification
func (b *browserService) DeleteKeys(server string, db int, ks []any, serialNo string) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	client := item.client
	ctx, cancelFunc := context.WithCancel(b.ctx)
	defer cancelFunc()

	cancelEvent := "delete:stop:" + serialNo
	cancelStopEvent := runtime.EventsOnce(ctx, cancelEvent, func(data ...any) {
		cancelFunc()
	})
	total := len(ks)
	var canceled bool
	var deletedKeys = make([]any, 0, total)
	var mutex sync.Mutex
	del := func(ctx context.Context, cli redis.UniversalClient) error {
		const batchSize = 1000
		for i := 0; i < total; i += batchSize {
			pipe := cli.Pipeline()
			for j := 0; j < batchSize; j++ {
				if i+j < total {
					pipe.Del(ctx, strutil.DecodeRedisKey(ks[i+j]))
				}
			}
			cmders, delErr := pipe.Exec(ctx)
			for j, cmder := range cmders {
				if cmder.(*redis.IntCmd).Val() == 1 {
					// save deleted key
					mutex.Lock()
					deletedKeys = append(deletedKeys, ks[i+j])
					mutex.Unlock()
				}
			}
			if errors.Is(delErr, context.Canceled) || canceled {
				canceled = true
				break
			}
		}
		return nil
	}

	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			return del(ctx, cli)
		})
	} else {
		err = del(ctx, client)
	}

	cancelStopEvent()
	resp.Success = true
	resp.Data = struct {
		Canceled bool `json:"canceled"`
		Deleted  any  `json:"deleted"`
		Failed   int  `json:"failed"`
	}{
		Canceled: canceled,
		Deleted:  deletedKeys,
		Failed:   len(ks) - len(deletedKeys),
	}
	return
}

// DeleteKeysByPattern delete keys by pattern
func (b *browserService) DeleteKeysByPattern(server string, db int, pattern string) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	client := item.client
	ctx, cancelFunc := context.WithCancel(b.ctx)
	defer cancelFunc()

	var ks []any
	ks, _, err = b.scanKeys(ctx, client, pattern, "", 0)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	total := len(ks)
	var canceled bool
	var deletedKeys = make([]any, 0, total)
	var mutex sync.Mutex
	del := func(ctx context.Context, cli redis.UniversalClient) error {
		const batchSize = 1000
		for i := 0; i < total; i += batchSize {
			pipe := cli.Pipeline()
			for j := 0; j < batchSize; j++ {
				if i+j < total {
					pipe.Del(ctx, strutil.DecodeRedisKey(ks[i+j]))
				}
			}
			cmders, delErr := pipe.Exec(ctx)
			for j, cmder := range cmders {
				if cmder.(*redis.IntCmd).Val() == 1 {
					// save deleted key
					mutex.Lock()
					deletedKeys = append(deletedKeys, ks[i+j])
					mutex.Unlock()
				}
			}
			if errors.Is(delErr, context.Canceled) || canceled {
				canceled = true
				break
			}
		}
		return nil
	}

	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			return del(ctx, cli)
		})
	} else {
		err = del(ctx, client)
	}

	resp.Success = true
	resp.Data = struct {
		Canceled bool `json:"canceled"`
		Deleted  any  `json:"deleted"`
		Failed   int  `json:"failed"`
	}{
		Canceled: canceled,
		Deleted:  deletedKeys,
		Failed:   len(ks) - len(deletedKeys),
	}
	return
}

// ExportKey export keys
func (b *browserService) ExportKey(server string, db int, ks []any, path string, includeExpire bool) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	client := item.client
	ctx, cancelFunc := context.WithCancel(b.ctx)
	defer cancelFunc()

	file, err := os.Create(path)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	defer file.Close()

	writer := csv.NewWriter(file)
	defer writer.Flush()

	cancelStopEvent := runtime.EventsOnce(ctx, "export:stop:"+path, func(data ...any) {
		cancelFunc()
	})
	processEvent := "exporting:" + path
	total := len(ks)
	var exported, failed int64
	var canceled bool
	startTime := time.Now().Add(-10 * time.Second)
	for i, k := range ks {
		if i >= total-1 || time.Now().Sub(startTime).Milliseconds() > 100 {
			startTime = time.Now()
			param := map[string]any{
				"total":      total,
				"progress":   i + 1,
				"processing": k,
			}
			runtime.EventsEmit(ctx, processEvent, param)
		}

		key := strutil.DecodeRedisKey(k)
		content, dumpErr := client.Dump(ctx, key).Bytes()
		if errors.Is(dumpErr, context.Canceled) || canceled {
			canceled = true
			break
		}
		record := []string{hex.EncodeToString([]byte(key)), hex.EncodeToString(content)}
		if includeExpire {
			if dur, ttlErr := client.PTTL(ctx, key).Result(); ttlErr == nil && dur > 0 {
				record = append(record, strconv.FormatInt(time.Now().Add(dur).UnixMilli(), 10))
			} else {
				record = append(record, "-1")
			}
		}
		if err = writer.Write(record); err != nil {
			failed += 1
		} else {
			exported += 1
		}
	}

	cancelStopEvent()
	resp.Success = true
	resp.Data = struct {
		Canceled bool  `json:"canceled"`
		Exported int64 `json:"exported"`
		Failed   int64 `json:"failed"`
	}{
		Canceled: canceled,
		Exported: exported,
		Failed:   failed,
	}
	return
}

// ImportCSV import data from csv file
func (b *browserService) ImportCSV(server string, db int, path string, conflict int, ttl int64) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	client := item.client
	ctx, cancelFunc := context.WithCancel(b.ctx)
	defer cancelFunc()

	file, err := os.Open(path)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	defer file.Close()

	reader := csv.NewReader(file)

	cancelEvent := "import:stop:" + path
	cancelStopEvent := runtime.EventsOnce(ctx, cancelEvent, func(data ...any) {
		cancelFunc()
	})
	processEvent := "importing:" + path
	var line []string
	var readErr error
	var key, value []byte
	var ttlValue time.Duration
	var imported, ignored int64
	var canceled bool
	startTime := time.Now().Add(-10 * time.Second)
	for {
		readErr = nil

		ttlValue = redis.KeepTTL
		line, readErr = reader.Read()
		if readErr != nil {
			break
		}

		if len(line) < 1 {
			continue
		}
		if key, readErr = hex.DecodeString(line[0]); readErr != nil {
			continue
		}
		if value, readErr = hex.DecodeString(line[1]); readErr != nil {
			continue
		}
		// get ttl
		if ttl < 0 && len(line) > 2 {
			// use previous
			if expire, ttlErr := strconv.ParseInt(line[2], 10, 64); ttlErr == nil && expire > 0 {
				ttlValue = time.UnixMilli(expire).Sub(time.Now())
			}
		} else if ttl > 0 {
			// custom ttl
			ttlValue = time.Duration(ttl) * time.Second
		}
		if conflict == 0 {
			readErr = client.RestoreReplace(ctx, string(key), ttlValue, string(value)).Err()
		} else {
			keyStr := string(key)
			// go-redis may crash when batch calling restore
			// use "exists" to filter first
			if n, _ := client.Exists(ctx, keyStr).Result(); n <= 0 {
				readErr = client.Restore(ctx, keyStr, ttlValue, string(value)).Err()
			} else {
				readErr = errors.New("key already existed")
			}
		}
		if readErr != nil {
			// restore fail
			ignored += 1
		} else {
			imported += 1
		}
		if errors.Is(readErr, context.Canceled) || canceled {
			canceled = true
			break
		}

		if time.Now().Sub(startTime).Milliseconds() > 100 {
			startTime = time.Now()
			param := map[string]any{
				"imported": imported,
				"ignored":  ignored,
				//"processing": string(key),
			}
			runtime.EventsEmit(ctx, processEvent, param)
			// do some sleep to prevent blocking the Redis server
			time.Sleep(10 * time.Millisecond)
		}
	}

	cancelStopEvent()
	resp.Success = true
	resp.Data = struct {
		Canceled bool  `json:"canceled"`
		Imported int64 `json:"imported"`
		Ignored  int64 `json:"ignored"`
	}{
		Canceled: canceled,
		Imported: imported,
		Ignored:  ignored,
	}
	return
}

// FlushDB flush database
func (b *browserService) FlushDB(server string, db int, async bool) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	flush := func(ctx context.Context, cli redis.UniversalClient, async bool) error {
		_, e := cli.TxPipelined(ctx, func(pipe redis.Pipeliner) error {
			pipe.Select(ctx, db)
			if async {
				pipe.FlushDBAsync(ctx)
			} else {
				pipe.FlushDB(ctx)
			}
			return nil
		})
		return e
	}

	client, ctx := item.client, item.ctx
	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			return flush(ctx, cli, async)
		})
		// try sync mode if error cause
		if err != nil && async {
			err = cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
				return flush(ctx, cli, false)
			})
		}
	} else {
		if err = flush(ctx, client, async); err != nil && async {
			// try sync mode if error cause
			err = flush(ctx, client, false)
		}
	}

	if err != nil {
		resp.Msg = err.Error()
		return
	}
	resp.Success = true
	return
}

// RenameKey rename key
func (b *browserService) RenameKey(server string, db int, key, newKey string) (resp types.JSResp) {
	item, err := b.getRedisClient(server, db)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	client, ctx := item.client, item.ctx
	if _, ok := client.(*redis.ClusterClient); ok {
		resp.Msg = "RENAME not support in cluster mode yet"
		return
	}

	if _, err = client.RenameNX(ctx, key, newKey).Result(); err != nil {
		resp.Msg = err.Error()
		return
	}

	resp.Success = true
	return
}

// GetCmdHistory get redis command history
func (b *browserService) GetCmdHistory(pageNo, pageSize int) (resp types.JSResp) {
	resp.Success = true
	if pageSize <= 0 || pageNo <= 0 {
		// return all history
		resp.Data = map[string]any{
			"list":     b.cmdHistory,
			"pageNo":   1,
			"pageSize": -1,
		}
	} else {
		total := len(b.cmdHistory)
		startIndex := total / pageSize * (pageNo - 1)
		endIndex := min(startIndex+pageSize, total)
		resp.Data = map[string]any{
			"list":     b.cmdHistory[startIndex:endIndex],
			"pageNo":   pageNo,
			"pageSize": pageSize,
		}
	}
	return
}

// CleanCmdHistory clean redis command history
func (b *browserService) CleanCmdHistory() (resp types.JSResp) {
	b.cmdHistory = []cmdHistoryItem{}
	resp.Success = true
	return
}

// GetSlowLogs get slow log list
func (b *browserService) GetSlowLogs(server string, num int64) (resp types.JSResp) {
	item, err := b.getRedisClient(server, -1)
	if err != nil {
		resp.Msg = err.Error()
		return
	}
	num = max(1, num)

	client, ctx := item.client, item.ctx
	var logs []redis.SlowLog
	if cluster, ok := client.(*redis.ClusterClient); ok {
		// cluster mode
		var mu sync.Mutex
		err = cluster.ForEachShard(ctx, func(ctx context.Context, cli *redis.Client) error {
			if subLogs, _ := client.SlowLogGet(ctx, num).Result(); len(subLogs) > 0 {
				mu.Lock()
				logs = append(logs, subLogs...)
				mu.Unlock()
			}
			return nil
		})
	} else {
		logs, err = client.SlowLogGet(ctx, num).Result()
	}
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	sort.Slice(logs, func(i, j int) bool {
		return logs[i].Time.UnixMilli() > logs[j].Time.UnixMilli()
	})
	if len(logs) > int(num) {
		logs = logs[:num]
	}

	list := sliceutil.Map(logs, func(i int) slowLogItem {
		var name string
		var e error
		if name, e = url.QueryUnescape(logs[i].ClientName); e != nil {
			name = logs[i].ClientName
		}
		return slowLogItem{
			Timestamp: logs[i].Time.UnixMilli(),
			Client:    name,
			Addr:      logs[i].ClientAddr,
			Cmd:       sliceutil.JoinString(logs[i].Args, " "),
			Cost:      logs[i].Duration.Milliseconds(),
		}
	})

	resp.Success = true
	resp.Data = map[string]any{
		"list": list,
	}
	return
}

// GetClientList get all connected client info
func (b *browserService) GetClientList(server string) (resp types.JSResp) {
	item, err := b.getRedisClient(server, -1)
	if err != nil {
		resp.Msg = err.Error()
		return
	}

	parseContent := func(content string) []map[string]string {
		lines := strings.Split(content, "\n")
		list := make([]map[string]string, 0, len(lines))
		for _, line := range lines {
			line = strings.TrimSpace(line)
			if len(line) > 0 {
				items := strings.Split(line, " ")
				itemKV := map[string]string{}
				for _, it := range items {
					kv := strings.SplitN(it, "=", 2)
					if len(kv) > 1 {
						itemKV[kv[0]] = kv[1]
					}
				}
				list = append(list, itemKV)
			}
		}
		return list
	}

	client, ctx := item.client, item.ctx
	var fullList []map[string]string
	var mutex sync.Mutex
	if cluster, ok := client.(*redis.ClusterClient); ok {
		cluster.ForEachMaster(ctx, func(ctx context.Context, cli *redis.Client) error {
			mutex.Lock()
			defer mutex.Unlock()
			fullList = append(fullList, parseContent(cli.ClientList(ctx).Val())...)
			return nil
		})
	} else {
		fullList = append(fullList, parseContent(client.ClientList(ctx).Val())...)
	}

	resp.Success = true
	resp.Data = map[string]any{
		"list": fullList,
	}
	return
}