import { getLatestVersion } from '../version.js'
import UserAgent from 'useragent'
export default async function (app, opts) {
  // Add a hook to set the version headers
  app.addHook('preHandler', async (req, reply) => {
    const latestVersion = await getLatestVersion()
    const version = req.headers.version || latestVersion
    reply.header('version', version)
    reply.header('latest-version', latestVersion)
    reply.version = version
  })

  // Add a hook to log errors
  app.addHook('onError', (req, reply, { message, stack, statusCode }, done) => {
    const error = { statusCode, stack }
    /* c8 ignore next */
    reply.log.error(error, message || 'request errored')
    done()
  })

  const slowRequestThreshold = parseInt(process.env.SLOW_REQUEST_THRESHOLD) || 4000

  // Logs the request with the 'debug' level and also logs headers with the 'trace' level
  app.addHook('onResponse', (req, reply, done) => {
    const responseTime = reply.getResponseTime()
    const loggingOptions = { url: req.raw.url, res: reply, method: req.method, responseTime }
    /* c8 ignore next */
    if (process.env.LOG_LEVEL === 'trace') loggingOptions.headers = req.headers
    reply.log.debug(loggingOptions, 'request completed')
    if (responseTime >= slowRequestThreshold) {
      loggingOptions.userAgent = UserAgent.lookup(req.headers['user-agent'])
      reply.log.info(loggingOptions, 'slow request')
    }
    done()
  })
}