logger.js

/**
 * Logger utility for the application
 */

const winston = require('winston');
const path = require('path');
const fs = require('fs');

// Create logs directory if it doesn't exist
const logDir = path.join(__dirname, '../../logs');
if (!fs.existsSync(logDir)) {
  fs.mkdirSync(logDir, { recursive: true });
}

// Define log format
const logFormat = winston.format.combine(
  winston.format.timestamp(),
  winston.format.json()
);

// Create logger instance
const logger = winston.createLogger({
  level: process.env.LOG_LEVEL || 'info',
  format: logFormat,
  defaultMeta: { service: 'xero-cfo-assistant' },
  transports: [
    // Console transport for all environments
    new winston.transports.Console({
      format: winston.format.combine(
        winston.format.colorize(),
        winston.format.simple()
      )
    }),
    // File transports for non-development environments
    ...(process.env.NODE_ENV !== 'development' ? [
      new winston.transports.File({ 
        filename: path.join(logDir, 'error.log'), 
        level: 'error' 
      }),
      new winston.transports.File({ 
        filename: path.join(logDir, 'combined.log') 
      })
    ] : [])
  ]
});

module.exports = logger;