"""Delivery channels: local file archive (always) + Telegram (when configured)."""

from __future__ import annotations

import logging

from us2kr.config import Settings
from us2kr.deliver.base import Deliverer, DeliveryError
from us2kr.deliver.file import FileDeliverer
from us2kr.deliver.telegram import TelegramDeliverer

log = logging.getLogger(__name__)

__all__ = ["Deliverer", "DeliveryError", "FileDeliverer", "TelegramDeliverer", "build_deliverers"]


def build_deliverers(settings: Settings) -> list[Deliverer]:
    """FileDeliverer always; TelegramDeliverer when both token and chat id are configured."""
    deliverers: list[Deliverer] = [FileDeliverer(settings.reports_dir)]
    if settings.telegram_enabled:
        assert settings.telegram_bot_token and settings.telegram_chat_id  # guaranteed by telegram_enabled
        deliverers.append(TelegramDeliverer(settings.telegram_bot_token, settings.telegram_chat_id))
    log.info("deliverers: %s", ", ".join(d.name for d in deliverers))
    return deliverers