TeleUploader/src/utils/logger.ts

import winston from 'winston';

const logger = winston.createLogger({
  level: process.env.LOG_LEVEL || 'info',
  format: winston.format.combine(
    winston.format.timestamp(),
    winston.format.errors({ stack: true }),
    winston.format.json(),
  ),
  defaultMeta: { service: 'teleuploader' },
  transports: [
    // Write all logs including error logs to file
    new winston.transports.File({ filename: 'logs/error.log', level: 'error' }),
    new winston.transports.File({ filename: 'logs/combined.log' }),
    // Console transport for docker logs / CLI visibility
    new winston.transports.Console({
      format:
        process.env.NODE_ENV !== 'production'
          ? winston.format.combine(winston.format.colorize(), winston.format.simple())
          : winston.format.json(),
    }),
  ],
});

export default logger;