"""Mail delivery via a configured SMTP relay (host/port/credentials in config.json)."""
import logging
import smtplib
from email.message import EmailMessage
from email.utils import make_msgid, formatdate

logger = logging.getLogger("pointeuse.mail")


def send_mail(to_addr: str, subject: str, body: str, from_addr: str, smtp_cfg: dict):
    host = smtp_cfg.get("host")
    if not host:
        logger.error("envoi annulé: aucun serveur SMTP configuré (smtp.host manquant dans config.json)")
        raise RuntimeError("Aucun serveur SMTP configuré (smtp.host manquant dans config.json).")
    port = int(smtp_cfg.get("port", 587))
    user = smtp_cfg.get("user")
    password = smtp_cfg.get("password")
    use_tls = smtp_cfg.get("use_tls", True)

    msg = EmailMessage()
    msg.set_content(body, cte="quoted-printable")  # évite MIME_BASE64_TEXT
    msg["Subject"] = subject
    msg["From"] = from_addr
    msg["To"] = to_addr
    msg["Message-ID"] = make_msgid(domain=from_addr.split("@", 1)[1])
    msg["Date"] = formatdate(localtime=True)

    logger.info(
        "envoi mail: to=%r from=%r subject=%r via smtp=%s:%s user=%r tls=%r",
        to_addr, from_addr, subject, host, port, user, use_tls,
    )
    try:
        with smtplib.SMTP(host, port, timeout=10) as smtp:
            smtp.set_debuglevel(1)
            if use_tls:
                logger.debug("STARTTLS vers %s:%s", host, port)
                smtp.starttls()
            if user:
                logger.debug("login SMTP en tant que %r", user)
                smtp.login(user, password)
            smtp.send_message(msg)
        logger.info("mail envoyé avec succès à %r", to_addr)
    except Exception:
        logger.exception("échec de l'envoi du mail à %r via %s:%s", to_addr, host, port)
        raise