package ice

import (
	"fmt"
)

// Role represents ICE agent role, which can be controlling or controlled.
type Role byte

// Possible ICE agent roles.
const (
	Controlling Role = iota
	Controlled
)

// UnmarshalText implements TextUnmarshaler.
func (r *Role) UnmarshalText(text []byte) error {
	switch string(text) {
	case "controlling":
		*r = Controlling
	case "controlled":
		*r = Controlled
	default:
		return fmt.Errorf("%w %q", errUnknownRole, text)
	}
	return nil
}

// MarshalText implements TextMarshaler.
func (r Role) MarshalText() (text []byte, err error) {
	return []byte(r.String()), nil
}

func (r Role) String() string {
	switch r {
	case Controlling:
		return "controlling"
	case Controlled:
		return "controlled"
	default:
		return "unknown"
	}
}