package commonflags

import (
	"slices"

	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
)

func AutoCompleteFlags(cmd *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
	var availableFlags []string
	cmd.Flags().VisitAll(func(f *pflag.Flag) {
		availableFlags = append(availableFlags, f.Name)
	})

	var usedFlags []string
	cmd.Flags().Visit(func(f *pflag.Flag) {
		usedFlags = append(usedFlags, f.Name)
	})

	unusedFlags := slices.DeleteFunc(availableFlags, func(name string) bool {
		return slices.Contains(usedFlags, name)
	})

	return unusedFlags, cobra.ShellCompDirectiveDefault
}