import { getLogger } from './logging.js';
import { isOperationalError } from './error-handling.js';

const logger = getLogger();

/**
 * Configure global unhandled error handlers
 */
export function setupGlobalErrorHandlers(): void {
  // Handle uncaught exceptions
  process.on('uncaughtException', (error) => {
    // Determine if error is operational or programming
    const isOperational = isOperationalError(error);
    
    // Log the error
    if (isOperational) {
      logger.warn('Uncaught operational exception:', error);
    } else {
      logger.error('Uncaught programming exception:', error);
    }
    
    // For non-operational errors, exit process after logging
    if (!isOperational) {
      logger.error('Process will exit due to unhandled programming error');
      // Allow logs to be written before exiting
      setTimeout(() => {
        process.exit(1);
      }, 1000);
    }
  });
  
  // Handle unhandled promise rejections
  process.on('unhandledRejection', (reason) => {
    // Convert the unhandled rejection to an unhandled exception
    logger.error('Unhandled Promise Rejection:', reason);
    throw reason;
  });
  
  // Graceful shutdown on SIGTERM
  process.on('SIGTERM', () => {
    logger.info('SIGTERM received, shutting down gracefully');
    process.exit(0);
  });
  
  // Graceful shutdown on SIGINT
  process.on('SIGINT', () => {
    logger.info('SIGINT received, shutting down gracefully');
    process.exit(0);
  });
  
  logger.info('Global error handlers configured');
}