src/lib/logger.ts

import * as winston from "winston";

import { configDotenv } from "dotenv";
configDotenv();

const logFormat = winston.format.printf(
  (info) =>
    `${info.timestamp} ${info.level} [${info.metadata.module ?? ""}:${info.metadata.method ?? ""}]: ${info.message} ${
      info.level.includes("error") || info.level.includes("warn")
        ? JSON.stringify(info.metadata, (_, value) => {
            if (value instanceof Error) {
              return {
                ...value,
                name: value.name,
                message: value.message,
                stack: value.stack,
                cause: value.cause,
              };
            } else {
              return value;
            }
          })
        : ""
    }`,
);

export const logger = winston.createLogger({
  level: process.env.LOGGING_LEVEL?.toLowerCase() ?? "debug",
  format: winston.format.json({
    replacer(key, value) {
      if (value instanceof Error) {
        return {
          ...value,
          name: value.name,
          message: value.message,
          stack: value.stack,
          cause: value.cause,
        };
      } else {
        return value;
      }
    },
  }),
  transports: [
    ...(process.env.FIRECRAWL_LOG_TO_FILE
      ? [
          new winston.transports.File({
            filename:
              "firecrawl-" +
              (process.argv[1].includes("worker") ? "worker" : "app") +
              "-" +
              crypto.randomUUID() +
              ".log",
          }),
        ]
      : []),
    new winston.transports.Console({
      format: winston.format.combine(
        winston.format.timestamp({ format: "YYYY-MM-DD HH:mm:ss" }),
        winston.format.metadata({
          fillExcept: ["message", "level", "timestamp"],
        }),
        ...((process.env.ENV === "production" &&
          process.env.SENTRY_ENVIRONMENT === "dev") ||
        process.env.ENV !== "production"
          ? [winston.format.colorize(), logFormat]
          : []),
      ),
    }),
  ],
});