import logger from './logger.js';

let pollingRetries = 0;
const MAX_POLLING_RETRIES = 5;

export default class ErrorHandler {
  static async handleError(bot, chatId, error, context) {
    logger.error({ err: error, context }, 'Error in handler');
    
    const errorMessage = process.env.NODE_ENV === 'development' 
      ? `Error: ${error.message}`
      : 'An error occurred. Please try again later.';
    
    if (!bot) return;
    try {
      await bot.sendMessage(chatId, errorMessage);
    } catch (sendError) {
      logger.error({ err: sendError }, 'Error sending error message');
    }
  }

  static handlePollingError(error) {
    if (error.code === 'ETELEGRAM') {
      const statusCode = error.response?.statusCode;
      const description = error.response?.body?.description || '';

      if (statusCode === 404 || description.includes('Not Found')) {
        pollingRetries++;
        logger.warn({ 
          attempt: pollingRetries, 
          maxRetries: MAX_POLLING_RETRIES,
          statusCode,
          description 
        }, 'Invalid bot token (404). Will retry up to %d times.', MAX_POLLING_RETRIES);

        if (pollingRetries >= MAX_POLLING_RETRIES) {
          logger.error({ maxRetries: MAX_POLLING_RETRIES }, 
            'Bot token is invalid after %d retries. Stopping polling. Admin panel continues running.', 
            MAX_POLLING_RETRIES);
        }
        return;
      }

      if (statusCode === 401 || statusCode === 403) {
        logger.error({ statusCode }, 'Authentication error. Stopping polling. Admin panel continues running.');
        return;
      }

      logger.error({ err: error }, 'Telegram API Error');
    } else {
      logger.error({ err: error }, 'Polling error');
    }
  }
}