server/src/utils/logger.ts

import winston from 'winston';
import { config } from '../config';

const logFormat = winston.format.combine(
    winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
    winston.format.errors({ stack: true }),
    winston.format.printf(({ timestamp, level, message, stack }) => {
        return `[${timestamp}] ${level.toUpperCase()}: ${stack || message}`;
    })
);

export const logger = winston.createLogger({
    level: config.nodeEnv === 'production' ? 'info' : 'debug',
    format: logFormat,
    transports: [
        new winston.transports.Console({
            format: winston.format.combine(
                winston.format.colorize(),
                logFormat
            ),
        }),
        new winston.transports.File({
            filename: 'logs/error.log',
            level: 'error',
        }),
        new winston.transports.File({
            filename: 'logs/combined.log',
        }),
    ],
});