const dotenv = require('dotenv')
const compression = require('compression')
const express = require('express')
const morgan = require('morgan')
const bodyParser = require('body-parser')
const path = require('path')
const rfs = require('rotating-file-stream')
const cors = require('cors')
const errorhandler = require('errorhandler')
const statusCodes = require('http-status-codes').StatusCodes
const createError = require('http-errors')

const apiRouter = require('./routes')

// load .env config file
dotenv.config()

// main app file
const app = express()

// create a rotating write stream
const accessLogStream = rfs.createStream('access.log', {
  interval: '1d', // rotate daily
  path: path.join(__dirname, 'log')
})

// setup the file logger
app.use(morgan('common', { stream: accessLogStream }))

// setup the console logger
if (process.env.NODE_ENV === 'development') {
  // [debug]
  app.use(morgan('dev'))
} else {
  // [production]
  app.use(morgan('dev', {
    skip: function (req, res) { return res.statusCode < 400 }
  }))
}

// be proxy aware
app.enable('trust proxy')

// cross-origin resource sharing
app.use(cors())

// json middleware
app.use(bodyParser.json())

// healthcheck (can be used for heart-beat)
app.get('/status', (req, res) => {
  res.status(200).end()
});
app.head('/status', (req, res) => {
  res.status(200).end()
});

// routes
app.use('/api', apiRouter)

// 404 middleware
app.use((req, res, next) => {
  next(createError(statusCodes.NOT_FOUND))
})

// error handling
app.use((err, req, res, next) => {
  /* Handle 401 */
  if (err.status === statusCodes.UNAUTHORIZED) {
    return res
      .status(err.status)
      .send({ message: err.message })
      .end()
  }
  return next(err)
})
if (process.env.NODE_ENV !== 'development') {
  app.use((err, req, res, next) => {
    res.status(err.status || 500)
    res.json({
      errors: {
        message: err.message,
      },
    })
  })
}

// start the server
app.listen(process.env.PORT, process.env.HOST)

console.log('service started on port ' process.env.HOST + ':' + process.env.PORT)