package cli

import (
	"flag"
	"fmt"
	"io"

	"gitea.maximumdirect.net/eric/distributor/internal/app"
)

func addFormatFlag(flags *flag.FlagSet) *string {
	return flags.String("format", string(app.OutputFormatText), "output format: text or json")
}

func parseOutputFormat(stderr io.Writer, command, raw string) (app.OutputFormat, bool) {
	format := app.OutputFormat(raw)
	if err := app.ValidateOutputFormat(format); err != nil {
		fmt.Fprintf(stderr, "%s: %s --format: %s\n", app.Name, command, err)
		return "", false
	}
	return app.NormalizeOutputFormat(format), true
}