/*
 * Sicherheitsunterweisung
 * Copyright (C) 2023  Jason Streifling
 *
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package data

import (
	"bufio"
	"fmt"
	"os"
	"strings"
	"syscall"

	"golang.org/x/term"
)

func getUsername() (string, error) {
	user := os.Getenv("DB_USER")
	if user == "" {
		var err error
		fmt.Printf("DB Benutzer: ")
		user, err = bufio.NewReader(os.Stdin).ReadString('\n')
		if err != nil {
			return "", fmt.Errorf("error: getUsername: bufio.NewReader().ReadString(): %v", err)
		}
	}
	return strings.TrimSpace(user), nil
}

func getPassword() (string, error) {
	pass := os.Getenv("DB_PASS")
	if pass == "" {
		fmt.Printf("DB Passwort: ")
		bytePass, err := term.ReadPassword(int(syscall.Stdin))
		if err != nil {
			return "", fmt.Errorf("error: getPassword: term.ReadPassword(): %v", err)
		}
		fmt.Println()
		pass = strings.TrimSpace(string(bytePass))
	}
	return pass, nil
}

func getCredentials() (string, string, error) {
	user, err := getUsername()
	if err != nil {
		return "", "", fmt.Errorf("error: getCredentials: getUsername(): %v", err)
	}

	pass, err := getPassword()
	if err != nil {
		return "", "", fmt.Errorf("error: getCredentials: getPassword(): %v", err)
	}

	return user, pass, nil
}