import TelegramBot from "node-telegram-bot-api";
import config from "../config/config.js";
import logger from "../utils/logger.js";

const MAX_RETRIES = 5;
const RETRY_DELAY_MS = 5000;

let bot = null;
let botAvailable = false;

const initBot = async () => {
    if (!config.BOT_TOKEN) {
        logger.warn('No BOT_TOKEN configured. Running in admin-only mode.');
        return null;
    }
    for (let attempt = 1; attempt <= MAX_RETRIES; attempt++) {
        try {
            const instance = new TelegramBot(config.BOT_TOKEN, {polling: true});
            await new Promise((resolve, reject) => {
                const timeout = setTimeout(() => {
                    instance.stopPolling();
                    reject(new Error('Bot initialization timeout'));
                }, 15000);
                instance.getMe().then(() => {
                    clearTimeout(timeout);
                    resolve();
                }).catch(reject);
            });
            logger.info({ attempt }, 'Bot initialized successfully');
            botAvailable = true;
            return instance;
        } catch (error) {
            logger.warn({ attempt, maxRetries: MAX_RETRIES, err: error.message }, 'Bot initialization failed');
            if (attempt < MAX_RETRIES) {
                await new Promise(r => setTimeout(r, RETRY_DELAY_MS));
            }
        }
    }
    logger.error({ maxRetries: MAX_RETRIES }, 'All bot initialization attempts failed. Running in admin-only mode.');
    return null;
};

bot = await initBot();

export { botAvailable };
export default bot;