#!/usr/bin/env python3

"""
SMTP Test Email Sender for Yandex Cloud Postbox

Скрипт для отправки тестового email через Yandex Cloud Postbox SMTP сервер.
Используется для проверки корректности настроек SMTP аутентификации.

Примеры использования:
python3 smtp-send-test-email.py --login "your-login" --password "smtp-password" --to "recipient@example.com"
"""

import smtplib
import argparse
import sys
from email.message import EmailMessage


def send_test_email(login, password, to_email):
    """Отправляет тестовое email через Yandex Cloud Postbox SMTP"""

    # initialize connection to our email server
    smtp = smtplib.SMTP("postbox.cloud.yandex.net", port="587")

    smtp.set_debuglevel(2)

    smtp.ehlo()  # send the extended hello to our server
    smtp.starttls()  # tell server we want to communicate with TLS encryption

    smtp.login(login, password)  # login to our email server

    message = EmailMessage()
    message.set_content("Hello, world! This is a test email from Yandex Cloud Postbox.")
    message.add_header("From", "service@vakhrushev.me")
    message.add_header("To", to_email)
    message.add_header("Subject", "Test Email from Yandex Cloud Postbox")

    # send our email message
    smtp.send_message(message)

    smtp.quit()  # finally, don't forget to close the connection

    print(f"Test email successfully sent to {to_email}")


def main():
    parser = argparse.ArgumentParser(
        description="Send a test email via Yandex Cloud Postbox SMTP server."
    )
    parser.add_argument(
        "--login", required=True, help="SMTP login (usually your email address)"
    )
    parser.add_argument(
        "--password",
        required=True,
        help="SMTP password (generated using smtp-convert-secret-key-to-password.py)",
    )
    parser.add_argument("--to", required=True, help="Recipient email address")

    args = parser.parse_args()

    try:
        send_test_email(args.login, args.password, args.to)
    except Exception as e:
        print(f"Error sending email: {e}", file=sys.stderr)
        sys.exit(1)


if __name__ == "__main__":
    main()