package ui

import (
	"fmt"

	"git.wxccs.org/iceking2nd/winauth-go/internal/authenticator"
	"git.wxccs.org/iceking2nd/winauth-go/internal/config"
)

// entryFromAuthenticator builds a serializable config.Entry from an
// in-memory authenticator plus its display name. The vendor string is
// derived from the authenticator's Name() (which already returns
// "google" / "microsoft" / "okta" / "hotp" / "battlenet" / "steam").
func entryFromAuthenticator(name string, a authenticator.Authenticator, hotkey string) config.Entry {
	return config.Entry{
		Name:      name,
		Vendor:    a.Name(),
		SecretRaw: a.SecretData(),
		Hotkey:    hotkey,
	}
}

// buildAuthenticator is the reverse of entryFromAuthenticator: it picks
// the right concrete type based on vendor, then asks it to parse the
// stored secret blob.
func buildAuthenticator(e config.Entry) (authenticator.Authenticator, error) {
	const fn = "internal.ui.buildAuthenticator"
	var a authenticator.Authenticator
	switch e.Vendor {
	case "google", "":
		a = authenticator.NewGoogleAuthenticator()
	case "microsoft":
		a = authenticator.NewMicrosoftAuthenticator()
	case "okta":
		a = authenticator.NewOktaVerifyAuthenticator()
	case "hotp":
		a = authenticator.NewHOTPAuthenticator()
	case "battlenet":
		a = authenticator.NewBattleNetAuthenticator()
	case "steam":
		a = authenticator.NewSteamAuthenticator()
	default:
		return nil, fmt.Errorf("%s: unknown vendor %q", fn, e.Vendor)
	}
	if err := a.SetSecretData(e.SecretRaw); err != nil {
		return nil, fmt.Errorf("%s: decode entry %q: %w", fn, e.Name, err)
	}
	return a, nil
}