import axios from 'axios';

const BOT_TOKEN = process.env.TELEGRAM_BOT_TOKEN;
const CHAT_ID = process.env.TELEGRAM_CHAT_ID;

/**
 * Send a Telegram message with Markdown formatting.
 * Silently logs on failure (don't crash the polling loop on a Telegram hiccup).
 */
export async function sendTelegram(text: string): Promise<void> {
  if (!BOT_TOKEN || !CHAT_ID) {
    console.warn('[telegram] BOT_TOKEN or CHAT_ID not set, skipping notification');
    return;
  }

  try {
    await axios.post(`https://api.telegram.org/bot${BOT_TOKEN}/sendMessage`, {
      chat_id: CHAT_ID,
      text,
      parse_mode: 'Markdown',
    });
  } catch (err) {
    const msg = err instanceof Error ? err.message : String(err);
    console.error(`[telegram] Send failed: ${msg}`);
  }
}

/**
 * Send a startup/shutdown notification
 */
export async function sendServiceNotification(event: 'start' | 'stop'): Promise<void> {
  const emoji = event === 'start' ? '🚀' : '🛑';
  await sendTelegram(`${emoji} *Position Tracker* ${event === 'start' ? 'started' : 'stopped'}`);
}