//
//  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//

package cli

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"os"
	//"os/signal"
	"path/filepath"
	"strconv"
	"strings"
	//"syscall"
	"unicode/utf8"

	"github.com/peterh/liner"
	"gopkg.in/yaml.v3"

	"ragflow/internal/cli/filesystem"
)

type APIServerConfig struct {
	Name         string  `yaml:"name"`
	Host         string  `yaml:"host"`
	UserName     *string `yaml:"user_name"`
	UserPassword *string `yaml:"password"`
	ApiToken     *string `yaml:"api_token"`
	IP           string
	Port         int
}

// ConfigFile represents the rf.yml configuration file structure
type ConfigFile struct {
	Host         string                      `yaml:"host"`      // default API server host
	APIToken     string                      `yaml:"api_token"` // default API server api token
	UserName     string                      `yaml:"user_name"` // default API server user name
	Password     string                      `yaml:"password"`  // default API server password
	APIServerMap map[string]*APIServerConfig `yaml:"api_servers"`
}

// OutputFormat represents the output format type
type OutputFormat string

const (
	OutputFormatTable OutputFormat = "table" // Table format with borders
	OutputFormatPlain OutputFormat = "plain" // Plain text, space-separated (no borders)
	OutputFormatJSON  OutputFormat = "json"  // JSON format (reserved for future use)
)

type CommandLineMode string

const (
	APIMode          CommandLineMode = "api"
	AdminMode        CommandLineMode = "admin"
	IngestorMode     CommandLineMode = "ingestor"  // If we want to access ingestor
	CollectorMode    CommandLineMode = "collector" // If we want to access collector
	DefaultAPIServer                 = "default"
)

type CommandLineConfig struct {
	CLIMode           CommandLineMode
	AdminClientConfig *AdminModeConfig
	APIClientConfig   APIModeConfig
	ShowHelp          bool
	Verbose           bool
	Interactive       bool
	OutputFormat      OutputFormat
	Command           *string
}

type AdminModeConfig struct {
	AdminHost     string
	AdminPort     int
	AdminName     *string
	AdminPassword *string
	//AdminCommand  *string
}

type APIModeConfig struct {
	CurrentAPIServer string
	APIServerMap     map[string]*APIServerConfig
}

func (c *CommandLineConfig) Print() {
	b, err := json.MarshalIndent(c, "", "  ")
	if err == nil {
		fmt.Println(string(b))
	}
}

func ParseArgs(args []string) (*CommandLineConfig, error) {
	commandLineConfig := &CommandLineConfig{
		CLIMode:           APIMode,
		AdminClientConfig: nil,
		ShowHelp:          false,
		Verbose:           false,
		Interactive:       true,
		OutputFormat:      OutputFormatTable,
		Command:           nil,
	}
	for i := 0; i < len(args); i++ {
		arg := args[i]

		switch arg {
		case "-o", "--output":
			// Parse output format
			if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
				format := args[i+1]
				switch format {
				case "plain":
					commandLineConfig.OutputFormat = OutputFormatPlain
				case "json":
					commandLineConfig.OutputFormat = OutputFormatJSON
				default:
					commandLineConfig.OutputFormat = OutputFormatTable
				}
				i++
			}
		case "-v", "--verbose":
			commandLineConfig.Verbose = true
		case "--admin", "-admin":
			commandLineConfig.CLIMode = AdminMode
		case "--help", "-help":
			commandLineConfig.ShowHelp = true
		default:
			if !strings.HasPrefix(arg, "-") {
				commandLineConfig.Interactive = false
			}
		}
	}

	var commandArgs []string
	var foundCommand bool

	switch commandLineConfig.CLIMode {
	case APIMode:
		defaultApiServerConfig := &APIServerConfig{
			UserName:     nil,
			UserPassword: nil,
			ApiToken:     nil,
		}

		configFile := "rf.yml"
		for i := 0; i < len(args); i++ {
			arg := args[i]

			// Handle known global flags (already parsed in first pass).
			// Intercept here regardless of position so they are never
			// mistaken for command args or unknown flags downstream.
			switch arg {
			case "-o", "--output":
				if i+1 < len(args) {
					i++
				}
				continue
			case "-v", "--verbose", "--help", "-help":
				continue
			case "--admin", "-admin":
				return nil, fmt.Errorf("unexpected parameter: --admin")
			}

			// If we've found the command, collect remaining args
			if foundCommand {
				commandArgs = append(commandArgs, arg)
				continue
			}

			switch arg {
			case "-h", "--host":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					hostVal := args[i+1]
					h, port, err := parseHostPort(hostVal)
					if err != nil {
						return nil, fmt.Errorf("invalid host format: %v", err)
					}
					defaultApiServerConfig.IP = h
					defaultApiServerConfig.Port = port
					i++
				}
			case "-t", "--token":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					defaultApiServerConfig.ApiToken = &args[i+1]
					i++
				}
			case "-u", "--user":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					defaultApiServerConfig.UserName = &args[i+1]
					i++
				}
			case "-p", "--password":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					defaultApiServerConfig.UserPassword = &args[i+1]
					i++
				}
			case "-f", "--config":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					configFile = args[i+1]
					// Convert to absolute path immediately
					if !filepath.IsAbs(configFile) {
						absPath, err := filepath.Abs(configFile)
						if err == nil {
							configFile = absPath
						}
					}
					i++
				}
			default:
				// Non-flag argument (command)
				if !strings.HasPrefix(arg, "-") {
					commandArgs = append(commandArgs, arg)
					foundCommand = true
				}
			}
		}

		var config ConfigFile
		data, err := os.ReadFile(configFile)
		if err == nil {
			if err = yaml.Unmarshal(data, &config); err != nil {
				return nil, fmt.Errorf("failed to parse rf.yml: %v", err)
			}
			if config.Host != "" {
				var h string
				var port int
				h, port, err = parseHostPort(config.Host)
				if err != nil {
					return nil, fmt.Errorf("invalid host in config file: %v", err)
				}
				if defaultApiServerConfig.IP == "" {
					defaultApiServerConfig.IP = h
				}
				if defaultApiServerConfig.Port == 0 {
					defaultApiServerConfig.Port = port
				}
			}
			if config.UserName != "" {
				if defaultApiServerConfig.UserName == nil {
					defaultApiServerConfig.UserName = &config.UserName
				}
			}
			if config.Password != "" {
				if defaultApiServerConfig.UserPassword == nil {
					defaultApiServerConfig.UserPassword = &config.Password
				}
			}
			if config.APIToken != "" {
				if defaultApiServerConfig.ApiToken == nil {
					defaultApiServerConfig.ApiToken = &config.APIToken
				}
			}
		} else {
			if configFile == "rf.yml" && os.IsNotExist(err) {
			} else {
				return nil, fmt.Errorf("failed to read %s: %v", configFile, err)
			}
		}

		if defaultApiServerConfig.IP == "" {
			defaultApiServerConfig.IP = "127.0.0.1"
		}
		if defaultApiServerConfig.Port == 0 {
			defaultApiServerConfig.Port = 9384
		}

		commandLineConfig.APIClientConfig.APIServerMap = config.APIServerMap
		if commandLineConfig.APIClientConfig.APIServerMap == nil {
			commandLineConfig.APIClientConfig.APIServerMap = make(map[string]*APIServerConfig)
		}
		if commandLineConfig.APIClientConfig.APIServerMap[DefaultAPIServer] != nil {
			return nil, fmt.Errorf("'Default' API server config should be in api_servers")
		}
		commandLineConfig.APIClientConfig.APIServerMap[DefaultAPIServer] = defaultApiServerConfig
		commandLineConfig.APIClientConfig.CurrentAPIServer = DefaultAPIServer
	case AdminMode:
		AdminConfig := &AdminModeConfig{
			AdminHost: "127.0.0.1",
			AdminPort: 9383,
			//AdminName:     "admin@ragflow.io",
			//AdminPassword: "admin",
		}

		for i := 0; i < len(args); i++ {
			arg := args[i]

			// Handle known global flags regardless of position
			switch arg {
			case "-o", "--output":
				if i+1 < len(args) {
					i++
				}
				continue
			case "-v", "--verbose", "--admin", "-admin", "--help", "-help":
				continue
			case "-t", "--token":
				return nil, fmt.Errorf("token is invalid in admin mode")
			case "-f", "--config":
				return nil, fmt.Errorf("config is invalid in admin mode")
			}

			// If we've found the command, collect remaining args
			if foundCommand {
				commandArgs = append(commandArgs, arg)
				continue
			}

			switch arg {
			case "-h", "--host":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					hostVal := args[i+1]
					h, port, err := parseHostPort(hostVal)
					if err != nil {
						return nil, fmt.Errorf("invalid host format: %v", err)
					}
					AdminConfig.AdminHost = h
					AdminConfig.AdminPort = port
					i++
				}
			case "-u", "--user":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					AdminConfig.AdminName = &args[i+1]
					i++
				}
			case "-p", "--password":
				if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
					AdminConfig.AdminPassword = &args[i+1]
					i++
				}
			default:
				// Non-flag argument (command)
				if !strings.HasPrefix(arg, "-") {
					commandArgs = append(commandArgs, arg)
					foundCommand = true
				}
			}
		}
		commandLineConfig.AdminClientConfig = AdminConfig
	}

	commandArgsLen := len(commandArgs)
	if commandArgsLen > 0 {
		if commandArgsLen == 1 {
			commandLineConfig.Command = &commandArgs[0]
		} else {
			ApiCommand := strings.Join(commandArgs, " ")
			commandLineConfig.Command = &ApiCommand
		}
	}

	return commandLineConfig, nil
}

// LoadDefaultConfigFile reads the rf.yml file from current directory if it exists
func LoadDefaultConfigFile() (*ConfigFile, error) {
	// Try to read rf.yml from current directory
	data, err := os.ReadFile("rf.yml")
	if err != nil {
		// File doesn't exist, return nil without error
		if os.IsNotExist(err) {
			return nil, nil
		}
		return nil, err
	}

	var config ConfigFile
	if err = yaml.Unmarshal(data, &config); err != nil {
		return nil, fmt.Errorf("failed to parse rf.yml: %v", err)
	}

	return &config, nil
}

// LoadConfigFileFromPath reads a config file from the specified path
func LoadConfigFileFromPath(path string) (*ConfigFile, error) {
	data, err := os.ReadFile(path)
	if err != nil {
		return nil, fmt.Errorf("failed to read config file %s: %v", path, err)
	}

	var config ConfigFile
	if err = yaml.Unmarshal(data, &config); err != nil {
		return nil, fmt.Errorf("failed to parse config file %s: %v", path, err)
	}

	return &config, nil
}

// parseHostPort parses a host:port string and returns host and port
func parseHostPort(hostPort string) (string, int, error) {
	if hostPort == "" {
		return "", -1, nil
	}

	// Split host and port
	parts := strings.Split(hostPort, ":")
	if len(parts) != 2 {
		return "", -1, fmt.Errorf("invalid host format, expected host:port, got: %s", hostPort)
	}

	host := parts[0]
	port, err := strconv.Atoi(parts[1])
	if err != nil {
		return "", -1, fmt.Errorf("invalid port number: %s", parts[1])
	}

	return host, port, nil
}

// looksLikeSQL checks if a string looks like a SQL command
func looksLikeSQL(s string) bool {
	s = strings.ToUpper(strings.TrimSpace(s))
	sqlPrefixes := []string{
		"LIST ", "SHOW ", "CREATE ", "DROP ", "ALTER ",
		"LOGIN ", "REGISTER ", "PING", "GRANT ", "REVOKE ",
		"SET ", "UNSET ", "UPDATE ", "DELETE ", "INSERT ",
		"SELECT ", "DESCRIBE ", "EXPLAIN ", "ADD ", "ENABLE ", "DISABLE ", "CHAT ", "USE", "THINK",
		"REMOVE ",
	}
	for _, prefix := range sqlPrefixes {
		if strings.HasPrefix(s, prefix) {
			return true
		}
	}
	return false
}

// PrintUsage prints the CLI usage information
func PrintUsage() {
	fmt.Println(`RAGFlow CLI Client

Usage: ragflow_cli [options] [command]

Options:
  -h, --host string      RAGFlow service address (host:port, default "127.0.0.1:9380")
  -t, --token string     API token for authentication
  -u, --user string      Username for authentication
  -p, --password string  Password for authentication
  -f, --config string    Path to config file (YAML format)
  -o, --output string    Output format: table, plain, json (search defaults to json)
  -v, --verbose          Enable verbose logging (shows debug info)
  --admin, -admin        Run in admin mode
  --help                 Show this help message

Mode:
  --admin, -admin        Run in admin mode (prompt: RAGFlow(admin)>)
  Default is user mode (prompt: RAGFlow(user)>).

Authentication:
  You can authenticate using either:
    1. API token: -t or --token
    2. Username and password: -u/--user and -p/--password
  Note: These two methods are mutually exclusive.

Configuration File:
  The CLI will automatically read rf.yml from the current directory if it exists.
  Use -f or --config to specify a custom config file path.
  Command line options override config file values.

  Config file format:
    host: 127.0.0.1:9380
    api_token: your-api-token
    user_name: your-username
    password: your-password

  Note: api_token and user_name/password are mutually exclusive in config file.

Commands:
  SQL commands (use quotes): "LIST USERS", "CREATE USER 'email' 'password'", etc.
  Filesystem commands (no quotes): ls datasets, search "keyword", cat path, etc.
  Skill commands:
    install-skill <space> <path|url> [options]  Install a skill from local path or remote URL
    uninstall-skill <space> <skill-name>         Remove an installed skill
    search skills -q <query> [--space space1]   Search skills in a space
  If no command is provided, CLI runs in interactive mode.`)
}

// HistoryFile returns the path to the history file
func HistoryFile() string {
	return os.Getenv("HOME") + "/" + historyFileName
}

const historyFileName = ".ragflow_cli_history"

// CLI represents the command line interface
type CLI struct {
	running bool
	line    *liner.State

	APIServerClientMap map[string]*HTTPClient
	AdminServerClient  *HTTPClient
	PasswordPrompt     PasswordPromptFunc // Function for password input
	ContextEngine      *filesystem.Engine // Context Engine for virtual filesystem
	CurrentModel       *CurrentModel      // Current model configuration
	Config             *CommandLineConfig
}

// NewCLI creates a new CLI instance
//func NewCLI() (*CLI, error) {
//	return NewCLIWithArgs(nil)
//}

func NewCLIWithConfig(commandLineConfig *CommandLineConfig) (*CLI, error) {
	// Create liner first
	line := liner.NewLiner()

	cli := &CLI{
		line:   line,
		Config: commandLineConfig,
	}

	if commandLineConfig.CLIMode == APIMode {
		apiServerConfig := commandLineConfig.APIClientConfig.APIServerMap[commandLineConfig.APIClientConfig.CurrentAPIServer]
		httpClient := NewHTTPClient()
		httpClient.Host = apiServerConfig.IP
		httpClient.Port = apiServerConfig.Port
		if apiServerConfig.ApiToken != nil {
			httpClient.APIToken = apiServerConfig.ApiToken
			httpClient.useAPIToken = true
		}
		cli.APIServerClientMap = map[string]*HTTPClient{
			cli.Config.APIClientConfig.CurrentAPIServer: httpClient,
		}
		// Auto-login if user and password are provided (from config file)
		if apiServerConfig.UserName != nil && apiServerConfig.UserPassword != nil && apiServerConfig.ApiToken == nil {
			if err := cli.LoginUserInteractive(*apiServerConfig.UserName, *apiServerConfig.UserPassword); err != nil {
				line.Close()
				return nil, fmt.Errorf("auto-login failed: %w", err)
			}
		}

		engine := filesystem.NewEngine()

		// Register providers
		// TODO: if http config change, engine http config won't be updated. They should share the same config
		engine.RegisterProvider(filesystem.NewDatasetProvider(&httpClientAdapter{httpClient}))
		engine.RegisterProvider(filesystem.NewFileProvider(&httpClientAdapter{httpClient}))
		engine.RegisterProvider(filesystem.NewSkillProvider(&httpClientAdapter{httpClient}))

		cli.ContextEngine = engine
	} else if commandLineConfig.CLIMode == AdminMode {
		httpClient := NewHTTPClient()
		httpClient.Host = commandLineConfig.AdminClientConfig.AdminHost
		httpClient.Port = commandLineConfig.AdminClientConfig.AdminPort
		cli.AdminServerClient = httpClient

		adminServerConfig := commandLineConfig.AdminClientConfig
		// Auto-login if user and password are provided (from config file)
		if adminServerConfig.AdminName != nil && adminServerConfig.AdminPassword != nil {
			if err := cli.LoginUserInteractive(*adminServerConfig.AdminName, *adminServerConfig.AdminPassword); err != nil {
				line.Close()
				return nil, fmt.Errorf("auto-login failed: %w", err)
			}
		}

	} else {
		return nil, fmt.Errorf("invalid CLI mode: %s", commandLineConfig.CLIMode)
	}

	return cli, nil
}

// Run starts the interactive CLI
func (c *CLI) NewRun() error {
	// If username is provided without password, prompt for password
	cliConfig := c.Config
	switch cliConfig.CLIMode {
	case APIMode:
		apiConfig := c.Config.APIClientConfig.APIServerMap[c.Config.APIClientConfig.CurrentAPIServer]
		if apiConfig.UserName != nil && apiConfig.UserPassword == nil && apiConfig.ApiToken == nil {
			// provider username but no password or api token
			maxAttempts := 3
			for attempt := 1; attempt <= maxAttempts; attempt++ {
				fmt.Printf("Please input your password: ")

				password, err := ReadPassword()

				if password == "" {
					if attempt < maxAttempts {
						fmt.Println("Password cannot be empty, please try again")
						continue
					}
					return errors.New("no password provided after 3 attempts")
				}

				apiConfig.UserPassword = &password

				if err = c.VerifyAuth(*apiConfig.UserName, *apiConfig.UserPassword); err != nil {
					if attempt < maxAttempts {
						fmt.Printf("Authentication failed (%d/%d attempts)\n", attempt, maxAttempts)
						continue
					}
					return fmt.Errorf("authentication failed after %d attempts", maxAttempts)
				}

				break
			}
		}

	case AdminMode:
		adminConfig := c.Config.AdminClientConfig
		if adminConfig.AdminName != nil && adminConfig.AdminPassword == nil {
			// provider username but no password or api token
			maxAttempts := 3
			for attempt := 1; attempt <= maxAttempts; attempt++ {
				fmt.Printf("Please input your password: ")

				password, err := ReadPassword()

				if password == "" {
					if attempt < maxAttempts {
						fmt.Println("Password cannot be empty, please try again")
						continue
					}
					return errors.New("no password provided after 3 attempts")
				}

				adminConfig.AdminPassword = &password

				if err = c.VerifyAuth(*adminConfig.AdminName, *adminConfig.AdminPassword); err != nil {
					if attempt < maxAttempts {
						fmt.Printf("Authentication failed (%d/%d attempts)\n", attempt, maxAttempts)
						continue
					}
					return fmt.Errorf("authentication failed after %d attempts", maxAttempts)
				}

				break
			}
		}

	default:
		return fmt.Errorf("unexpected CLI mode: %s", cliConfig.CLIMode)
	}

	c.running = true

	// Load history from file
	histFile := HistoryFile()
	if f, err := os.Open(histFile); err == nil {
		c.line.ReadHistory(f)
		f.Close()
	}

	// Save history on exit
	defer func() {
		if f, err := os.Create(histFile); err == nil {
			c.line.WriteHistory(f)
			f.Close()
		}
		c.line.Close()
	}()

	fmt.Println("Welcome to RAGFlow CLI")
	fmt.Println("Type \\? for help, \\q to quit")
	fmt.Println()

	for c.running {
		var prompt string
		switch cliConfig.CLIMode {
		case APIMode:
			prompt = fmt.Sprintf("RAGFlow(api/%s)> ", c.Config.APIClientConfig.CurrentAPIServer)
		case AdminMode:
			prompt = "RAGFlow(admin)> "
		default:
			return fmt.Errorf("unexpected CLI mode: %s", cliConfig.CLIMode)
		}
		input, err := c.line.Prompt(prompt)
		if err != nil {
			fmt.Printf("Error reading input: %v\n", err)
			continue
		}

		input = strings.TrimSpace(input)

		if input == "" {
			continue
		}

		// Add to history (skip meta commands)
		if !strings.HasPrefix(input, "\\") {
			c.line.AppendHistory(input)
		}

		if err = c.executeNew(input); err != nil {
			fmt.Printf("CLI error: %v\n", err)
		}
	}

	return nil
}

func (c *CLI) executeNew(input string) error {
	p := NewParser(input)
	cmd, err := p.Parse(c.Config.CLIMode)
	if err != nil {
		return err
	}

	if cmd == nil {
		return nil
	}

	// Handle meta commands
	if cmd.Type == "meta" {
		return c.handleMetaCommand(cmd)
	}

	// Execute the command using the client
	var result ResponseIf
	result, err = c.ExecuteCommand(cmd)
	if result != nil {
		result.PrintOut()
	}
	return err
}

// executeFilesystem executes a Filesystem command and returns a ResponseIf.
func (c *CLI) executeFilesystem(cmd *Command) (ResponseIf, error) {
	rawInput, _ := cmd.Params["command"].(string)

	r, w, err := os.Pipe()
	if err != nil {
		return nil, fmt.Errorf("create stdout pipe: %w", err)
	}
	old := os.Stdout
	os.Stdout = w
	defer func() {
		os.Stdout = old
		_ = w.Close()
		_ = r.Close()
	}()

	var buf strings.Builder
	copyErrCh := make(chan error, 1)
	go func() {
		_, copyErr := io.Copy(&buf, r)
		copyErrCh <- copyErr
	}()

	execErr := c.executeFilesystemInner(rawInput)
	_ = w.Close() // signal EOF to reader goroutine
	copyErr := <-copyErrCh
	if copyErr != nil {
		return nil, fmt.Errorf("capture filesystem output: %w", copyErr)
	}
	return &FileSystemResponse{Output: buf.String()}, execErr
}

// executeFilesystemInner executes a Filesystem command and writes output to stdout.
// It is called by executeFilesystem which captures the stdout output.
func (c *CLI) executeFilesystemInner(input string) error {
	// Parse input into arguments
	var args []string
	// Interactive mode: parse input
	args = parseFilesystemArgs(input)

	if len(args) == 0 {
		return fmt.Errorf("no command provided")
	}

	// Check if we have a filesystem engine
	if c.ContextEngine == nil {
		return fmt.Errorf("filesystem engine not available")
	}

	cmdType := args[0]
	cmdArgs := args[1:]

	// Build filesystem command
	var ceCmd *filesystem.Command

	httpClient := c.APIServerClientMap[c.Config.APIClientConfig.CurrentAPIServer]

	switch cmdType {
	case "ls", "list":
		// Parse list command arguments
		listOpts, err := parseListCommandArgs(cmdArgs)
		if err != nil {
			return err
		}
		if listOpts == nil {
			// Help was printed
			return nil
		}
		ceCmd = &filesystem.Command{
			Type: filesystem.CommandList,
			Path: listOpts.Path,
			Params: map[string]interface{}{
				"limit": listOpts.Limit,
			},
		}
	case "search":
		// Parse search command arguments
		searchOpts, err := parseSearchCommandArgs(cmdArgs)
		if err != nil {
			return err
		}
		if searchOpts == nil {
			// Help was printed
			return nil
		}
		// Determine the path for provider resolution
		// Use first dir if specified, otherwise default to "datasets"
		searchPath := "datasets"
		if len(searchOpts.Dirs) > 0 {
			searchPath = searchOpts.Dirs[0]
		}
		// Check if searching skills (supports: "skills" or "skills/space1")
		if searchPath == "skills" || strings.HasPrefix(searchPath, "skills/") {
			// Parse space ID from path (e.g., "skills/space1" -> "space1")
			spaceID := "default"
			if strings.HasPrefix(searchPath, "skills/") {
				spaceID = strings.TrimPrefix(searchPath, "skills/")
				if spaceID == "" {
					spaceID = "default"
				}
			}
			// Get skill provider and perform search
			provider := c.ContextEngine.GetProvider("skills")
			if provider == nil {
				return fmt.Errorf("skill provider not available")
			}
			skillProvider, ok := provider.(*filesystem.SkillProvider)
			if !ok {
				return fmt.Errorf("invalid skill provider type")
			}
			pageSize := searchOpts.TopK
			if pageSize <= 0 {
				pageSize = 10
			}
			searchOptions := &filesystem.SearchOptions{
				Query:  searchOpts.Query,
				Limit:  pageSize,
				Offset: 0,
				TopK:   pageSize,
			}
			result, err := skillProvider.Search(context.Background(), spaceID, searchOptions)
			if err != nil {
				return err
			}
			// Print skill search results with full details
			c.printSkillSearchResults(result, c.Config.OutputFormat)
			return nil
		}
		ceCmd = &filesystem.Command{
			Type: filesystem.CommandSearch,
			Path: searchPath,
			Params: map[string]interface{}{
				"query":     searchOpts.Query,
				"top_k":     searchOpts.TopK,
				"threshold": searchOpts.Threshold,
				"dirs":      searchOpts.Dirs,
			},
		}
	case "cat":
		if len(cmdArgs) == 0 {
			return fmt.Errorf("cat requires a path argument")
		}
		// Handle cat command directly since it returns []byte, not *Result
		content, err := c.ContextEngine.Cat(context.Background(), cmdArgs[0])
		if err != nil {
			return err
		}
		if content == nil || len(content) == 0 {
			fmt.Println("(empty file)")
		} else if isBinaryContent(content) {
			return fmt.Errorf("cannot display binary file content")
		}

		fmt.Println(string(content))
		return nil
	case "install-skill":
		// Get the file provider and skill provider from the engine
		fileProvider, ok := c.ContextEngine.GetProvider("files").(*filesystem.FileProvider)
		if !ok {
			return fmt.Errorf("file provider not available")
		}
		skillProvider := c.ContextEngine.GetProvider("skills")
		if skillProvider == nil {
			return fmt.Errorf("skill provider not available")
		}
		// Create adapter for HTTPClient
		httpAdapter := &httpClientAdapter{client: httpClient}
		cmd := filesystem.NewInstallSkillCommand(httpAdapter, fileProvider, skillProvider)
		return cmd.Execute(cmdArgs)
	case "uninstall-skill":
		skillProvider := c.ContextEngine.GetProvider("skills")
		if skillProvider == nil {
			return fmt.Errorf("skill provider not available")
		}
		fileProvider := c.ContextEngine.GetProvider("files")
		if fileProvider == nil {
			return fmt.Errorf("file provider not available")
		}
		// Create adapter for HTTPClient
		httpAdapter := &httpClientAdapter{client: httpClient}
		fileProv, _ := fileProvider.(*filesystem.FileProvider)
		cmd := filesystem.NewUninstallSkillCommand(httpAdapter, skillProvider, fileProv)
		return cmd.Execute(cmdArgs)
	default:
		return fmt.Errorf("unknown filesystem command: %s", cmdType)
	}

	// Execute the command
	result, err := c.ContextEngine.Execute(context.Background(), ceCmd)
	if err != nil {
		return err
	}

	// Print result
	// For search command, default to JSON format if not explicitly set to plain/table
	format := c.Config.OutputFormat
	if ceCmd.Type == filesystem.CommandSearch && format != OutputFormatPlain && format != OutputFormatTable {
		format = OutputFormatJSON
	}
	// Get limit for list command
	limit := 0
	if ceCmd.Type == filesystem.CommandList {
		if l, ok := ceCmd.Params["limit"].(int); ok {
			limit = l
		}
	}
	c.printFilesystemResult(result, ceCmd.Type, format, limit)
	return nil
}

// parseFilesystemArgs parses Filesystem command arguments
// Supports simple space-separated args and quoted strings
func parseFilesystemArgs(input string) []string {
	var args []string
	var current strings.Builder
	inQuote := false
	var quoteChar rune

	for _, ch := range input {
		switch ch {
		case '"', '\'':
			if !inQuote {
				inQuote = true
				quoteChar = ch
				if current.Len() > 0 {
					args = append(args, current.String())
					current.Reset()
				}
			} else if ch == quoteChar {
				inQuote = false
				args = append(args, current.String())
				current.Reset()
			} else {
				current.WriteRune(ch)
			}
		case ' ', '\t':
			if inQuote {
				current.WriteRune(ch)
			} else if current.Len() > 0 {
				args = append(args, current.String())
				current.Reset()
			}
		default:
			current.WriteRune(ch)
		}
	}

	if current.Len() > 0 {
		args = append(args, current.String())
	}

	return args
}

// printFilesystemResult prints the result of a filesystem command
func (c *CLI) printFilesystemResult(result *filesystem.Result, cmdType filesystem.CommandType, format OutputFormat, limit int) {
	if result == nil {
		return
	}

	switch cmdType {
	case filesystem.CommandList:
		if len(result.Nodes) == 0 {
			fmt.Println("(empty)")
			return
		}
		displayCount := len(result.Nodes)
		if limit > 0 && displayCount > limit {
			displayCount = limit
		}
		if format == OutputFormatPlain {
			// Plain format: simple space-separated, no headers
			for i := 0; i < displayCount; i++ {
				node := result.Nodes[i]
				fmt.Printf("%s %s %s %s\n", node.Name, node.Type, node.Path, node.CreatedAt.Format("2006-01-02 15:04"))
			}
		} else {
			// Table format: with headers and aligned columns
			fmt.Printf("%-30s %-12s %-50s %-20s\n", "NAME", "TYPE", "PATH", "CREATED")
			fmt.Println(strings.Repeat("-", 112))
			for i := 0; i < displayCount; i++ {
				node := result.Nodes[i]
				created := node.CreatedAt.Format("2006-01-02 15:04")
				if node.CreatedAt.IsZero() {
					created = "-"
				}
				// Remove leading "/" from path for display
				displayPath := node.Path
				if strings.HasPrefix(displayPath, "/") {
					displayPath = displayPath[1:]
				}
				fmt.Printf("%-30s %-12s %-50s %-20s\n", node.Name, node.Type, displayPath, created)
			}
		}
		if limit > 0 && result.Total > limit {
			fmt.Printf("\n... and %d more (use -n to show more)\n", result.Total-limit)
		}
		fmt.Printf("Total: %d\n", result.Total)
	case filesystem.CommandSearch:
		if len(result.Nodes) == 0 {
			if format == OutputFormatJSON {
				fmt.Println("[]")
			} else {
				fmt.Println("No results found")
			}
			return
		}
		// Build data for output (same fields for all formats: content, path, score)
		type searchResult struct {
			Content string  `json:"content"`
			Path    string  `json:"path"`
			Score   float64 `json:"score,omitempty"`
		}
		results := make([]searchResult, 0, len(result.Nodes))
		for _, node := range result.Nodes {
			content := node.Name
			if content == "" {
				content = "(empty)"
			}
			displayPath := node.Path
			if strings.HasPrefix(displayPath, "/") {
				displayPath = displayPath[1:]
			}
			var score float64
			if s, ok := node.Metadata["similarity"].(float64); ok {
				score = s
			} else if s, ok := node.Metadata["_score"].(float64); ok {
				score = s
			}
			results = append(results, searchResult{
				Content: content,
				Path:    displayPath,
				Score:   score,
			})
		}
		// Output based on format
		if format == OutputFormatJSON {
			jsonData, err := json.MarshalIndent(results, "", "  ")
			if err != nil {
				fmt.Printf("Error marshaling JSON: %v\n", err)
				return
			}
			fmt.Println(string(jsonData))
		} else if format == OutputFormatPlain {
			// Plain format: simple space-separated, no borders
			fmt.Printf("%-70s  %-50s  %-10s\n", "CONTENT", "PATH", "SCORE")
			for i, sr := range results {
				content := strings.Join(strings.Fields(sr.Content), " ")
				if len(content) > 70 {
					content = content[:67] + "..."
				}
				displayPath := sr.Path
				if len(displayPath) > 50 {
					displayPath = displayPath[:47] + "..."
				}
				scoreStr := "-"
				if sr.Score > 0 {
					scoreStr = fmt.Sprintf("%.4f", sr.Score)
				}
				fmt.Printf("%-70s  %-50s  %-10s\n", content, displayPath, scoreStr)
				if i >= 99 {
					fmt.Printf("\n... and %d more results\n", result.Total-i-1)
					break
				}
			}
			fmt.Printf("\nTotal: %d\n", result.Total)
		} else {
			// Table format: with borders
			col1Width, col2Width, col3Width := 70, 50, 10
			sep := "+" + strings.Repeat("-", col1Width+2) + "+" + strings.Repeat("-", col2Width+2) + "+" + strings.Repeat("-", col3Width+2) + "+"
			fmt.Println(sep)
			fmt.Printf("| %-70s | %-50s | %-10s |\n", "CONTENT", "PATH", "SCORE")
			fmt.Println(sep)
			for i, sr := range results {
				content := strings.Join(strings.Fields(sr.Content), " ")
				if len(content) > 70 {
					content = content[:67] + "..."
				}
				displayPath := sr.Path
				if len(displayPath) > 50 {
					displayPath = displayPath[:47] + "..."
				}
				scoreStr := "-"
				if sr.Score > 0 {
					scoreStr = fmt.Sprintf("%.4f", sr.Score)
				}
				fmt.Printf("| %-70s | %-50s | %-10s |\n", content, displayPath, scoreStr)
				if i >= 99 {
					fmt.Printf("\n... and %d more results\n", result.Total-i-1)
					break
				}
			}
			fmt.Println(sep)
			fmt.Printf("Total: %d\n", result.Total)
		}
	case filesystem.CommandCat:
		// Cat output is handled differently - it returns []byte, not *Result
		// This case should not be reached in normal flow since Cat returns []byte directly
		fmt.Println("Content retrieved")
	}
}

// printSkillSearchResults prints skill search results with full details
func (c *CLI) printSkillSearchResults(result *filesystem.Result, format OutputFormat) {
	if result == nil || len(result.Nodes) == 0 {
		if format == OutputFormatJSON {
			fmt.Println("[]")
		} else {
			fmt.Println("No skills found")
		}
		return
	}

	// Skill search result structure
	type skillSearchResult struct {
		SkillID     string  `json:"skill_id"`
		Name        string  `json:"name"`
		Description string  `json:"description"`
		Tags        string  `json:"tags"`
		Score       float64 `json:"score"`
		BM25Score   float64 `json:"bm25_score"`
		VectorScore float64 `json:"vector_score"`
	}

	results := make([]skillSearchResult, 0, len(result.Nodes))
	for _, node := range result.Nodes {
		// Extract metadata
		skillID := ""
		if id, ok := node.Metadata["skill_id"].(string); ok {
			skillID = id
		}
		description := ""
		if desc, ok := node.Metadata["description"].(string); ok {
			description = desc
		}
		tags := ""
		if t, ok := node.Metadata["tags"].([]string); ok {
			tags = strings.Join(t, ", ")
		}
		var score, bm25Score, vectorScore float64
		if s, ok := node.Metadata["score"].(float64); ok {
			score = s
		}
		if b, ok := node.Metadata["bm25_score"].(float64); ok {
			bm25Score = b
		}
		if v, ok := node.Metadata["vector_score"].(float64); ok {
			vectorScore = v
		}

		results = append(results, skillSearchResult{
			SkillID:     skillID,
			Name:        node.Name,
			Description: description,
			Tags:        tags,
			Score:       score,
			BM25Score:   bm25Score,
			VectorScore: vectorScore,
		})
	}

	if format == OutputFormatJSON {
		jsonData, err := json.MarshalIndent(results, "", "  ")
		if err != nil {
			fmt.Printf("Error marshaling JSON: %v\n", err)
			return
		}
		fmt.Println(string(jsonData))
	} else if format == OutputFormatPlain {
		fmt.Printf("Found %d skill(s):\n", len(results))
		for _, sr := range results {
			fmt.Printf("\nName: %s\n", sr.Name)
			fmt.Printf("Skill ID: %s\n", sr.SkillID)
			fmt.Printf("Description: %s\n", sr.Description)
			fmt.Printf("Tags: %s\n", sr.Tags)
			fmt.Printf("Score: %.6f (BM25: %.6f, Vector: %.6f)\n", sr.Score, sr.BM25Score, sr.VectorScore)
		}
	} else {
		// Table format
		fmt.Printf("Found %d skill(s):\n", len(results))
		fmt.Println()
		for _, sr := range results {
			fmt.Printf("Name:        %s\n", sr.Name)
			fmt.Printf("Skill ID:    %s\n", sr.SkillID)
			fmt.Printf("Description: %s\n", sr.Description)
			fmt.Printf("Tags:        %s\n", sr.Tags)
			fmt.Printf("Score:       %.6f (BM25: %.6f, Vector: %.6f)\n", sr.Score, sr.BM25Score, sr.VectorScore)
			fmt.Println()
		}
	}
}

func (c *CLI) handleMetaCommand(cmd *Command) error {
	command := cmd.Params["command"].(string)
	//args, _ := cmd.Params["args"].([]string)

	switch command {
	case "q", "quit", "exit":
		fmt.Println("Goodbye!")
		c.running = false
	case "?", "h", "help":
		c.printHelp()
	default:
		return fmt.Errorf("unknown meta command: \\%s", command)
	}
	return nil
}

func (c *CLI) printHelp() {
	help := `
RAGFlow CLI Help
================

Meta Commands:
  \admin        - Switch to ADMIN mode (port 9381)
  \user         - Switch to USER mode (port 9380)
  \host [ip]    - Show or set server host (default: 127.0.0.1)
  \port [num]   - Show or set server port (default: 9380 for user, 9381 for admin)
  \status       - Show current connection status
  \? or \h      - Show this help
  \q or \quit   - Exit CLI
  \c or \clear  - Clear screen

Commands (User Mode):
  LOGIN USER 'email';                                    - Login as user
  LOGIN USER 'email' PASSWORD 'pwd';                     - Login as user with password
  REGISTER USER 'name' AS 'nickname' PASSWORD 'pwd';     - Register new user
  SHOW VERSION;                                          - Show version info
  PING;                                                  - Ping server
  LIST DATASETS;                                         - List user datasets
  LIST AGENTS;                                           - List user agents
  LIST CHATS;                                            - List user chats
  LIST MODEL PROVIDERS;                                  - List model providers
  LIST DEFAULT MODELS;                                   - List default models
  LIST TOKENS;                                           - List API tokens
  LIST PROVIDERS;                                        - List available LLM providers
  CREATE TOKEN;                                          - Create new API token
  ADD PROVIDER 'name';                                - Create a provider without API key
  ADD PROVIDER 'name' 'api_key';                      - Create a provider with API key
  DROP TOKEN 'token_value';                              - Delete an API token
  DELETE PROVIDER 'name';                                  - Delete a provider
  SET TOKEN 'token_value';                               - Set and validate API token
  SHOW TOKEN;                                            - Show current API token
  SHOW PROVIDER 'name';                                  - Show provider details
  SHOW CURRENT MODEL;                                    - Show current model settings
  UNSET TOKEN;                                           - Remove current API token
  ALTER PROVIDER 'name' NAME 'new_name';                 - Rename a provider
  USE MODEL 'provider/instance/model';                   - Set current model for chat
  CHAT 'message';                                        - Chat using current model
  CHAT 'provider/instance/model' 'message';              - Chat with specified model

Filesystem Commands (no quotes):
  ls [path]                    - List resources
                                 e.g., ls                   - List root (providers and folders)
                                 e.g., ls datasets          - List all datasets
                                 e.g., ls datasets/kb1      - Show dataset info
                                 e.g., ls myfolder          - List files in 'myfolder' (file_manager)
  list [path]                  - Same as ls
  search [options]             - Search resources in datasets
                                 Use 'search -h' for detailed options
  cat <path>                   - Show file content
                                 e.g., cat files/docs/file.txt  - Show file content
                                 Note: cat datasets or cat datasets/kb1 will error

Examples:
  ragflow_cli -f rf.yml "LIST USERS"           # SQL mode (with quotes)
  ragflow_cli -f rf.yml ls datasets            # Filesystem mode (no quotes)
  ragflow_cli -f rf.yml ls files               # List files in root
  ragflow_cli -f rf.yml cat datasets           # Error: datasets is a directory
  ragflow_cli -f rf.yml ls files/myfolder      # List folder contents

For more information, see documentation.
`
	fmt.Println(help)
}

// Cleanup performs cleanup before exit
func (c *CLI) Cleanup() {
	// Close liner to restore terminal settings
	if c.line != nil {
		c.line.Close()
	}
}

// RunSingleCommand executes a single command and exits
func (c *CLI) RunSingleCommand(command *string) error {
	// Ensure cleanup is called on exit to restore terminal settings
	defer c.Cleanup()

	// Execute the command
	if err := c.executeNew(*command); err != nil {
		return err
	}
	return nil
}

// VerifyAuth verifies authentication if needed
func (c *CLI) NewVerifyAuth(username, password *string) error {
	// Otherwise, use username/password authentication
	if username == nil {
		return fmt.Errorf("username is required")
	}

	if password == nil {
		return fmt.Errorf("password is required")
	}

	// Create login command with username and password
	cmd := NewCommand("login_user")
	cmd.Params["email"] = *username
	cmd.Params["password"] = *password
	_, err := c.ExecuteCommand(cmd)
	return err
}

// VerifyAuth verifies authentication if needed
func (c *CLI) VerifyAuth(username, password string) error {
	// Otherwise, use username/password authentication
	if username == "" {
		return fmt.Errorf("username is required")
	}

	if password == "" {
		return fmt.Errorf("password is required")
	}

	// Create login command with username and password
	cmd := NewCommand("login_user")
	cmd.Params["email"] = username
	cmd.Params["password"] = password
	_, err := c.ExecuteCommand(cmd)
	return err
}

// isBinaryContent checks if content is binary (contains null bytes or invalid UTF-8)
func isBinaryContent(content []byte) bool {
	// Check for null bytes (binary file indicator)
	for _, b := range content {
		if b == 0 {
			return true
		}
	}
	// Check valid UTF-8
	return !utf8.Valid(content)
}

// SearchCommandOptions holds parsed search command options
type SearchCommandOptions struct {
	Query     string
	TopK      int
	Threshold float64
	Dirs      []string
}

// ListCommandOptions holds parsed list command options
type ListCommandOptions struct {
	Path  string
	Limit int
}

// parseSearchCommandArgs parses search command arguments
// Format: search <query> [path] [-n number]
//
//	search -h|--help (shows help)
func parseSearchCommandArgs(args []string) (*SearchCommandOptions, error) {
	opts := &SearchCommandOptions{
		TopK:      10,
		Threshold: 0.2,
		Dirs:      []string{},
	}

	// Check for help flag
	for _, arg := range args {
		if arg == "-h" || arg == "--help" {
			printSearchHelp()
			return nil, nil
		}
	}

	// Parse arguments
	// Format: search <query> [path] [-n number]
	i := 0
	for i < len(args) {
		arg := args[i]

		// Handle -n flag for number of results
		if arg == "-n" || arg == "--number" {
			if i+1 >= len(args) {
				return nil, fmt.Errorf("missing value for %s flag", arg)
			}
			topK, err := strconv.Atoi(args[i+1])
			if err != nil {
				return nil, fmt.Errorf("invalid number value: %s", args[i+1])
			}
			opts.TopK = topK
			i += 2
			continue
		}

		// If it starts with -, it's an unknown flag
		if strings.HasPrefix(arg, "-") {
			return nil, fmt.Errorf("unknown flag: %s", arg)
		}

		// Non-flag arguments: first is query, second is path
		if opts.Query == "" {
			opts.Query = arg
		} else if len(opts.Dirs) == 0 {
			opts.Dirs = append(opts.Dirs, arg)
		}
		i++
	}

	// Validate required parameters
	if opts.Query == "" {
		return nil, fmt.Errorf("query is required")
	}

	// If no path specified, default to "datasets"
	if len(opts.Dirs) == 0 {
		opts.Dirs = []string{"datasets"}
	}

	return opts, nil
}

// printSearchHelp prints help for the search command
func printSearchHelp() {
	help := `Search command usage: search <query> [path] [-n number]

Search for content in datasets or skills.

Arguments:
  <query>                Search query (required)
                         Example: "machine learning"
  [path]                 Path to search in (default: datasets)
                         Supports:
                           - 'datasets' (all datasets)
                           - 'datasets/<kb_name>' (specific dataset)
                           - 'skills' (default skill space)
                           - 'skills/<space_name>' (specific skill space)
                         Example: skills/space1

Options:
  -n, --number <num>     Number of results to return (default: 10)
                         Example: -n 20
  -h, --help             Show this help message

Output:
  Default output format is JSON. Use --output plain or --output table for other formats.

Examples:
  search "neural networks"                          # Search all datasets
  search "AI" datasets/kb1                          # Search in kb1
  search "RAG" skills/space1 -n 20                    # Search skills in hub1, return 20 results
  search "data processing" skills                   # Search skills (default space)

Datasets syntax (full filter set):
  search 'query' on datasets 'kb_names' [with <option> <value> ...] [;]

  'kb_names' is a single quoted string. Pass one name for a single
  dataset, or a comma-separated list (no spaces) to search across
  multiple datasets in one call:
    'kb1'                  # one dataset
    'kb1,kb2'              # two datasets
    'kb1,kb2,kb3'          # three datasets

  When 'on datasets' is given, the search runs against the named
  dataset(s) and accepts the full WITH-option set below.

  WITH options (space-separated, not comma-separated):
    top_k                   <int>     Number of results (default 5)
    page_size               <int>     Page size for pagination
    page                    <int>     Page number (1-based)
    similarity_threshold    <float>   Minimum similarity score (0.0-1.0)
    vector_similarity_weight <float>  Weight given to vector vs text score
    keyword                 true|false  Enable keyword extraction via LLM
    use_kg                  true|false  Enable knowledge-graph augmentation
    rerank_id               'id'      Rerank model to apply
    tenant_rerank_id        'id'      Tenant-scoped rerank model
    search_id               'id'      Idempotency / search-session id
    meta_data_filter        '<json>'  Metadata filter (must be valid JSON)
    cross_languages         ['a','b'] Source languages to translate from
    doc_ids                 ['d1',...] Restrict to specific document ids

  Examples:
    search 'AI' on datasets 'kb_chinese' with top_k 10;
    search 'AI' on datasets 'kb1' 'kb2' with top_k 20 similarity_threshold 0.3 cross_languages ['Chinese']
        doc_ids ['d1', 'd2'];
    search 'manual' on datasets 'kb1' with
        meta_data_filter '{"method":"manual","conditions":[{"key":"author","op":"eq","value":"Luo"}]}';
`
	fmt.Println(help)
}

// printListHelp prints help for the list/ls command
func printListHelp() {
	help := `List command usage: ls [path] [options]

List contents of a path in the context filesystem.

Arguments:
  [path]                 Path to list (default: root - shows all providers and folders)
                         Examples: datasets, datasets/kb1, myfolder

Options:
  -n, --limit <number>   Maximum number of items to display (default: 10)
                         Example: -n 20
  -h, --help             Show this help message

Examples:
  ls                          # List root (all providers and file_manager folders)
  ls datasets                 # List all datasets
  ls datasets/kb1             # List files in kb1 dataset (default 10 items)
  ls myfolder                 # List files in file_manager folder 'myfolder'
  ls -n 5                     # List 5 items at root
`
	fmt.Println(help)
}

// parseListCommandArgs parses list/ls command arguments
// Format: ls [path] [-n limit] [-h|--help]
func parseListCommandArgs(args []string) (*ListCommandOptions, error) {
	opts := &ListCommandOptions{
		Path:  "", // Empty path means list root (all providers and file_manager folders)
		Limit: 10,
	}

	// Check for help flag
	for _, arg := range args {
		if arg == "-h" || arg == "--help" {
			printListHelp()
			return nil, nil
		}
	}

	// Parse arguments
	i := 0
	for i < len(args) {
		arg := args[i]

		switch arg {
		case "-n", "--limit":
			if i+1 >= len(args) {
				return nil, fmt.Errorf("missing value for %s flag", arg)
			}
			limit, err := strconv.Atoi(args[i+1])
			if err != nil {
				return nil, fmt.Errorf("invalid limit value: %s", args[i+1])
			}
			opts.Limit = limit
			i += 2
		default:
			// If it doesn't start with -, treat as path
			if !strings.HasPrefix(arg, "-") {
				opts.Path = arg
			} else {
				return nil, fmt.Errorf("unknown flag: %s", arg)
			}
			i++
		}
	}

	return opts, nil
}