from __future__ import annotations

import smtplib
from email.message import EmailMessage


class EmailNotifier:
    def __init__(
        self,
        *,
        host: str | None,
        port: int,
        username: str | None,
        password: str | None,
        from_address: str | None,
        use_tls: bool,
    ) -> None:
        self.host = host
        self.port = port
        self.username = username
        self.password = password
        self.from_address = from_address
        self.use_tls = use_tls

    @property
    def configured(self) -> bool:
        return bool(self.host and self.from_address)

    def send(self, *, to_address: str, subject: str, body: str) -> None:
        if not self.configured:
            return
        message = EmailMessage()
        message["Subject"] = subject
        message["From"] = self.from_address
        message["To"] = to_address
        message.set_content(body)
        with smtplib.SMTP(self.host, self.port, timeout=10) as smtp:
            if self.use_tls:
                smtp.starttls()
            if self.username and self.password:
                smtp.login(self.username, self.password)
            smtp.send_message(message)