// SPDX-License-Identifier: BSD-3-Clause

package cli

import (
	"fmt"
	"strings"
)

// Parse dig-like commands and set the options as such.
func ParseDig(arg string, opts *Options) error {
	// returns true if the flag starts with a no
	isNo := !strings.HasPrefix(arg, "no")
	switch arg {
	// Set DNS query flags
	case "aa", "aaflag", "aaonly", "noaa", "noaaflag", "noaaonly":
		opts.AA = isNo
	case "ad", "adflag", "noad", "noadflag":
		opts.AD = isNo
	case "cd", "cdflag", "nocd", "nocdflag":
		opts.CD = isNo
	case "qr", "qrflag", "noqr", "noqrflag":
		opts.QR = isNo
	case "ra", "raflag", "nora", "noraflag":
		opts.RA = isNo
	case "rd", "rdflag", "recurse", "nord", "nordflag", "norecurse":
		opts.RD = isNo
	case "tc", "tcflag", "notc", "notcflag":
		opts.TC = isNo
	case "z", "zflag", "noz", "nozflag":
		opts.Z = isNo
	// End DNS query flags

	case "dnssec", "nodnssec":
		opts.DNSSEC = isNo
	case "tcp", "vc", "notcp", "novc":
		opts.TCP = isNo
	case "ignore", "noignore":
		opts.Truncate = isNo

	// Formatting
	case "short", "noshort":
		opts.Short = isNo
	case "json", "nojson":
		opts.JSON = isNo
	case "xml", "noxml":
		opts.XML = isNo
	case "yaml", "noyaml":
		opts.YAML = isNo
	// End formatting

	default:
		return fmt.Errorf("dig: unknown flag given")
	}
	return nil
}