import logging
import smtplib
from email.message import EmailMessage

from app.core.config import get_settings

logger = logging.getLogger("gsfdc.mailer")


def send_email(*, to: str, subject: str, body: str) -> None:
    settings = get_settings()
    host = settings.smtp_host.strip()
    if not host:
        raise RuntimeError("SMTP 未配置")
    sender = (settings.smtp_sender or settings.smtp_user).strip()
    if not sender:
        raise RuntimeError("SMTP 发件人未配置")
    message = EmailMessage()
    message["From"] = sender
    message["To"] = to
    message["Subject"] = subject
    message.set_content(body)
    if settings.smtp_use_ssl:
        with smtplib.SMTP_SSL(host, settings.smtp_port, timeout=20) as smtp:
            if settings.smtp_user.strip():
                smtp.login(settings.smtp_user.strip(), settings.smtp_password)
            smtp.send_message(message)
        return
    with smtplib.SMTP(host, settings.smtp_port, timeout=20) as smtp:
        smtp.starttls()
        if settings.smtp_user.strip():
            smtp.login(settings.smtp_user.strip(), settings.smtp_password)
        smtp.send_message(message)