const path = require('path')
const chokidar = require('chokidar')
const YAML = require('yaml')
const fs = require('fs')

const refresh = async (app, db_dir) => {
  const gear_path = path.join(db_dir, 'gear.yaml')

  let gear = {}

  YAML.parse(await fs.promises.readFile(gear_path, { encoding: 'utf8' })).forEach((v,i) => {
    let type = 'untyped'
    if (v.type) {
      type = v.type+'s'
    }
    if (!gear[type]) {
      gear[type] = []
    }
    gear[type].push(v)
  })

  app.live = {
    ...app.live,
    db: {
      ...app.live.db,
      gear: gear,
    },
  }
}

module.exports = {
  priority: 1,
  load: async (plugin, app) => {
    // Load up our DB.
    const db_dir = path.resolve(path.join(app.config.srd, 'db'))
  
    await refresh(app, db_dir)
  
    const watcher = chokidar.watch(db_dir, {persistent: true})
    watcher.on('change', p => {
      refresh(app, db_dir)
    })
    plugin.log('watching', db_dir)
  
    app.express.use(require('./route.js')(plugin, app))
  },
}