const path      = require('path')
const chokidar  = require('chokidar')

// Watch the srd/sys directory and reload config on changes.
module.exports = async (plugin, app) => {
  const sys_path = path.resolve(path.join(app.config.srd, 'sys'))
  const dpath = path.join(sys_path, 'dictionary.js')
  const cpath = path.join(sys_path, 'conf.js')
  const mpath = path.join(sys_path, 'menu.js')

  const refresh = () => {
    delete require.cache[dpath]
    delete require.cache[cpath]
    delete require.cache[mpath]
    app.live = {
      ...app.live,
      dictionary: require(dpath),
      conf: require(cpath),
      menu: require(mpath),
    }
  }

  refresh()

  const watcher = chokidar.watch(sys_path, {persistent: true})
  watcher.on('change', p => {
    refresh()
  })

  plugin.log('watching', sys_path)
}