import * as winston from 'winston'

const { format, transports, addColors } = winston
const { combine, timestamp, printf, colorize, label, errors } = format

const parseMessage = (message) => {
  if (typeof message === 'object') {
    if (message.req) {
      return `Incoming request: route ${message.req.routeOptions.url}, method ${message.req.routeOptions.method}, from ${message.req.ip}`
    }
    if (message.res?.request) {
      return `Request completed: route ${message.res.request.routeOptions.url}, method ${message.res.request.routeOptions.method}, from ${message.res.request.ip} `
    }
  }
  return message
}

const logPrinter = printf((log) => {
  const { level, message, stack } = log
  const _label = log.label
  const _timestamp = log.timestamp
  const _message = parseMessage(message)
  if (stack) return `${_timestamp} [${_label}] ${level}: ${_message}\n${stack}`
  return `${_timestamp} [${_label}] ${level}: ${_message}`
})

// addColors({ ...winston.config.syslog.colors, fatal: winston.config.syslog.colors.error, warn: winston.config.syslog.colors.warn, trace: winston.config.syslog.colors.silly })

const init = (service) => {
  winston.loggers.add('default', {
    level: 'info',
    levels: Object.assign({ 'fatal': 0, 'warn': 4, 'trace': 7 }, winston.config.syslog.levels),
    format: combine(
      // colorize(),
      label({ label: service }),
      timestamp(),
      errors({ stack: true }),
      logPrinter
    ),
    transports: [
      new transports.Console()
    ]
  })

  const logger = winston.loggers.get('default')

  return logger
}

export default init