import { isTestInstance } from './server/helpers/core-utils'
import * as bodyParser from 'body-parser'
import * as express from 'express'
import * as cors from 'cors'
import * as morgan from 'morgan'
import { apiRouter } from './server/controllers/api'
import { logger } from './server/helpers/logger'
import { API_VERSION, CONFIG } from './server/initializers/constants'
import { VideosIndexer } from './server/lib/schedulers/videos-indexer'
import { initVideosIndex } from './server/lib/elastic-search-videos'
import { initChannelsIndex } from './server/lib/elastic-search-channels'

if (isTestInstance()) {
  require('source-map-support').install()
}

const app = express()

app.use(morgan('combined', {
  stream: { write: logger.info.bind(logger) }
}))

app.use(bodyParser.json({
  type: [ 'application/json', 'application/*+json' ],
  limit: '500kb'
}))
app.use(bodyParser.urlencoded({ extended: false }))

// ----------- Views, routes and static files -----------

app.use(cors())

const apiRoute = '/api/' + API_VERSION
app.use(apiRoute, apiRouter)

// ----------- Errors -----------

// Catch 404 and forward to error handler
app.use(function (req, res, next) {
  const err = new Error('Not Found')
  err['status'] = 404
  next(err)
})

app.use(function (err, req, res, next) {
  let error = 'Unknown error.'
  if (err) {
    error = err.stack || err.message || err
  }

  logger.error('Error in controller.', { error })
  return res.status(err.status || 500).end()
})

// ----------- Run -----------

app.listen(CONFIG.LISTEN.PORT, async () => {
  logger.info('Server listening on port %d', CONFIG.LISTEN.PORT)

  try {
    await Promise.all([
      initVideosIndex(),
      initChannelsIndex()
    ])
  } catch (err) {
    logger.error('Cannot init videos index.', { err })
    process.exit(-1)
  }

  VideosIndexer.Instance.enable()
  VideosIndexer.Instance.execute()
    .catch(err => logger.error('Cannot run video indexer', { err }))
})