import fs from 'fs';
import path from 'path';

const logDir = path.join(process.cwd(), 'logs');
if (!fs.existsSync(logDir)) {
  fs.mkdirSync(logDir, { recursive: true });
}

const LEVELS = {
  ERROR: 'ERROR',
  WARN: 'WARN',
  INFO: 'INFO',
  DEBUG: 'DEBUG'
};

const getCurrentTimestamp = () => {
  return new Date().toISOString();
};

const writeLog = (level, message, meta = {}) => {
  const timestamp = getCurrentTimestamp();
  const logEntry = {
    timestamp,
    level,
    message,
    meta
  };

  console.log(`[${timestamp}] ${level}: ${message}`, meta);

  const logFileName = `${new Date().toISOString().slice(0, 10)}.log`;
  const logFilePath = path.join(logDir, logFileName);
  
  fs.appendFile(logFilePath, JSON.stringify(logEntry) + '\n', (err) => {
    if (err) {
      console.error('Failed to write log to file:', err);
    }
  });
};

const logger = {
  error: (message, meta) => writeLog(LEVELS.ERROR, message, meta),
  warn: (message, meta) => writeLog(LEVELS.WARN, message, meta),
  info: (message, meta) => writeLog(LEVELS.INFO, message, meta),
  debug: (message, meta) => writeLog(LEVELS.DEBUG, message, meta)
};

export default logger;