import { readFileSync } from 'fs'
import getLog from './core/log.mjs'
import lowdb from './core/db.mjs'
import Core from './core/core.mjs'
import Util from './core/util.mjs'

let config

try {
  config = JSON.parse(readFileSync('./config.json'))
} catch (err) {
  let logger = getLog('critical-error')
  logger.fatal('Error opening config file')
  logger.fatal('Make sure it is valid JSON')
  logger.fatal(err)
  logger.event.error('Unable to start, error in config.json: ' + err.message)
  process.exit(10)
}

const log = getLog(config.name)

const close = function(err) {
  if (err) {
    log.fatal(err, 'App recorded a fatal error')
    log.event.error('App recorded a fatal error: ' + err.message, null, function() {
      process.exit(4)
    })
    return
  }
  log.warn('App asked to be restarted')
  log.event.warn('App requested to be restarted', null, function() {
    process.exit(0)
  })
}

const util = new Util(import.meta.url)

lowdb(util, log).then(async function(db) {
  let core = new Core(util, config, db, log, close)
  let errors = 0
  try {
    await core.start('app')
  } catch (err) {
    log.event.error('Unable to start app: ' + err.message)
    log.error(err, 'Unable to start app')
    errors++
  }
  try {
    await core.start('manage')
  } catch (err) {
    log.event.error('Unable to start manage: ' + err.message)
    log.error(err, 'Unable to start manage')
    errors++
  }
  core.startMonitor()
  if (errors === 2 || (!core.appRunning && !core.manageRunning)) {
    throw new Error('Neither manage or app were started, exiting.')
  }
}, function(err) {
  log.fatal(err, 'Critical error opening database')
  log.event.error('Critical error opening database: ' + err.message, null, function() {
    process.exit(2)
  })
}).catch(function(err) {
  log.fatal(err, 'Unknown error occured opening app')
  log.event.error('Unknown error occured opening app: ' + err.message, null, function() {
    process.exit(3)
  })
})