const winston = require('winston');

const logger = winston.createLogger({
  level: process.env.LOG_LEVEL || 'info',
  format: winston.format.combine(
    winston.format.timestamp(),
    winston.format.json()
  ),
  transports: [
    new winston.transports.Console({
      format: winston.format.simple()
    })
  ]
});

if (process.env.NODE_ENV === 'production') {
  logger.add(new winston.transports.File({ 
    filename: 'error.log', 
    level: 'error' 
  }));
  logger.add(new winston.transports.File({ 
    filename: 'combined.log' 
  }));
}

module.exports = logger;