package shared

import (
	"github.com/cli/cli/v2/pkg/cmdutil"
	"github.com/google/shlex"
	"github.com/spf13/cobra"
)

// ExistingCommandFunc returns a function that will check if the given string
// corresponds to an existing command.
func ExistingCommandFunc(f *cmdutil.Factory, cmd *cobra.Command) func(string) bool {
	return func(args string) bool {
		split, err := shlex.Split(args)
		if err != nil || len(split) == 0 {
			return false
		}

		rootCmd := cmd.Root()
		cmd, _, err = rootCmd.Traverse(split)
		if err == nil && cmd != rootCmd {
			return true
		}

		for _, ext := range f.ExtensionManager.List() {
			if ext.Name() == split[0] {
				return true
			}
		}

		return false
	}
}