const winston = require("winston");
const path = require("path");
require("dotenv").config();

// Define log format
const logFormat = winston.format.combine(
  winston.format.timestamp({ format: "YYYY-MM-DD HH:mm:ss" }),
  winston.format.errors({ stack: true }),
  winston.format.splat(),
  winston.format.json()
);

// Console format for development
const consoleFormat = winston.format.combine(
  winston.format.colorize(),
  winston.format.timestamp({ format: "YYYY-MM-DD HH:mm:ss" }),
  winston.format.printf(({ timestamp, level, message, ...meta }) => {
    let msg = `${timestamp} [${level}]: ${message}`;
    if (Object.keys(meta).length > 0) {
      msg += ` ${JSON.stringify(meta)}`;
    }
    return msg;
  })
);

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

// Create logger instance
const logger = winston.createLogger({
  level: process.env.LOG_LEVEL || "info",
  format: logFormat,
  defaultMeta: { service: "skyartshop" },
  transports: [
    // Error logs
    new winston.transports.File({
      filename: path.join(logsDir, "error.log"),
      level: "error",
      maxsize: 10485760, // 10MB
      maxFiles: 5,
    }),
    // Combined logs
    new winston.transports.File({
      filename: path.join(logsDir, "combined.log"),
      maxsize: 10485760, // 10MB
      maxFiles: 5,
    }),
  ],
});

// Add console transport in non-production
if (process.env.NODE_ENV !== "production") {
  logger.add(
    new winston.transports.Console({
      format: consoleFormat,
    })
  );
}

// Create a stream for Morgan HTTP logger
logger.stream = {
  write: (message) => logger.info(message.trim()),
};

module.exports = logger;