src/utils/logger.js

import pino from 'pino';
import fs from 'fs';
import path from 'path';
import dotenv from 'dotenv';

dotenv.config();

const logDir = path.dirname(process.env.LOG_FILE || 'logs/simulator.log');
const logFile = process.env.LOG_FILE || 'logs/simulator.log';

if (!fs.existsSync(logDir)) {
  fs.mkdirSync(logDir, { recursive: true });
}

const targets = [
  {
    level: process.env.LOG_LEVEL || 'info',
    target: 'pino-pretty',
    options: {
      colorize: true,
      translateTime: 'SYS:standard',
      ignore: 'pid,hostname',
    },
  },
  {
    level: process.env.LOG_LEVEL || 'info',
    target: 'pino/file',
    options: {
      destination: logFile,
      mkdir: true,
      append: true,
    },
  },
];

const logger = pino(
  {
    level: process.env.LOG_LEVEL || 'info',
    base: { pid: false },
    timestamp: () => `,"time":"${new Date().toISOString()}"`,
    redact: {
      paths: ['github.token', 'ai.huggingface.apiKey'],
      censor: '[REDACTED]',
    },
  },
  pino.transport({ targets })
);

const originalError = logger.error.bind(logger);
logger.error = (obj, msg, ...args) => {
  if (obj instanceof Error) {
    originalError(
      {
        err: {
          message: obj.message,
          stack: obj.stack,
          name: obj.name,
        },
      },
      msg || obj.message,
      ...args
    );
  } else {
    originalError(obj, msg, ...args);
  }
};

export default logger;