from typing import Union
import aiogram
import html
from src.notifications.base import INotificationService
from src.processor.dto import EnrichedNewsItemDTO

class TelegramNotifier(INotificationService):
    def __init__(self, bot: aiogram.Bot, chat_id: Union[str, int]):
        self.bot = bot
        self.chat_id = chat_id

    async def send_alert(self, item: EnrichedNewsItemDTO) -> None:
        title = html.escape(item.title)
        summary = html.escape(item.summary_ru)
        anomalies_list = [html.escape(a) for a in item.anomalies_detected] if item.anomalies_detected else []
        anomalies_text = ", ".join(anomalies_list) if anomalies_list else "None"
        url = html.escape(item.url)

        formatted_text = (
            f"<b>{title}</b>\n\n"
            f"Relevance: {item.relevance_score}/10\n"
            f"Anomalies: {anomalies_text}\n\n"
            f"{summary}\n\n"
            f"<a href='{url}'>Source</a>"
        )
        await self.bot.send_message(chat_id=self.chat_id, text=formatted_text, parse_mode="HTML")