const express = require('express')

const cors = require('cors')

const dotenv = require('dotenv')

const path = require('path')

const colors = require('colors')

// third party packages

const morgan = require('morgan')

const rfs = require('rotating-file-stream')

// Custom

const errorHandler = require('./middleware/error')

const connectDB = require('./config/db')

// Midllewares

const logger = require('./middleware/logger')

const fileupload = require("express-fileupload");

// Router оруулж ирэх

const categoriesRoutes = require('./routes/categories')

const bookRoutes = require('./routes/books')

const usersRoutes = require('./routes/users')

// nodejs ajillah ued process.env uusdeg

// Аппын тохиргоог process.env рүү ачаалах

dotenv.config({

path: './config.env'

})

const app = express()

connectDB()

// create a write stream (a in append mode)

var accessLogStream = rfs.createStream('access.log', {

interval: '1d',

path: path.join(__dirname, 'log'),

})

// Body parser // request -ийн body хэвлэхдээ ашиглах объект

// request body -г json болгож өгнө.

const corsOptions = {

origin: 'http://localhost:9000',

optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204

}

app.use(cors(corsOptions))

app.use(express.json())

app.use(fileupload())

app.use(logger)

app.use(morgan('combined', {stream: accessLogStream}))

app.use('/api/v1/categories', categoriesRoutes)

app.use('/api/v1/books', bookRoutes)

app.use('/api/v1/users', usersRoutes)

app.use(errorHandler)

const server = app.listen(process.env.PORT, console.log(`express server...${process.env.PORT} дээр аслаа.`.rainbow))

process.on('unhandledRejection', (err, promise) => {

console.log(`Алдаа гарлаа: ${err.message}`.red.underline.bold)

server.close(() => {

process.exit(1)

})

})