"""Mail sender via SMTP (Mailhog in dev)."""
from __future__ import annotations

import asyncio
from email.message import EmailMessage

import aiosmtplib
from fastapi import APIRouter

from core.config import settings
from core.di import register_service

router = APIRouter()


class MailService:
    async def send(self, to: str, subject: str, body_html: str, body_text: str = "") -> None:
        msg = EmailMessage()
        msg["From"] = settings.MAIL_FROM
        msg["To"] = to
        msg["Subject"] = subject
        if body_text:
            msg.set_content(body_text)
            msg.add_alternative(body_html, subtype="html")
        else:
            msg.set_content(body_html, subtype="html")
        try:
            await aiosmtplib.send(
                msg,
                hostname=settings.SMTP_HOST,
                port=settings.SMTP_PORT,
                start_tls=False,
            )
        except Exception as e:  # noqa: BLE001
            print(f"[mail] send error: {e}")

    def send_sync(self, to: str, subject: str, body_html: str, body_text: str = "") -> None:
        """Blocking wrapper for event handlers."""
        try:
            asyncio.run(self.send(to, subject, body_html, body_text))
        except RuntimeError:
            # inside running loop (unlikely in sync event handlers, but just in case)
            loop = asyncio.new_event_loop()
            try:
                loop.run_until_complete(self.send(to, subject, body_html, body_text))
            finally:
                loop.close()


def on_load() -> None:
    register_service("MailService", MailService())