'use strict'

// Dependencies
const express = require('express')
const { logMessage, errorMessage } = require('../lib/logger')
const logRoute = require('../middleware/logRoute')
const testValidUser = require('../middleware/testValidUser')

// Server state
let server
let serverStarted = false
let serverClosing = false

// Setup error handling
const unhandledError = (err) => {
  // Log the errors
  errorMessage('router', err)

  // Only clean up once
  if (serverClosing) {
    return
  }
  serverClosing = true

  // If server has started, close it down
  if (serverStarted) {
    server.close(() => {
      process.exit(1)
    })
  }
}
process.on('uncaughtException', unhandledError)
process.on('unhandledRejection', unhandledError)

const app = express()

// Middlewares
app.use(express.json())
app.use(express.static('public'))
app.use(express.urlencoded({ extended: true }))

// API Routes
app.use('/api', logRoute, testValidUser, require('./apiRoute'))
// Add non API routes here if needed

// Common error handlers
app.use((req, res, next) => {
  logMessage('router', `Route not found: ${req.url}`)
  return res.status(404).json({ error: `Route not found: ${req.url}` })
})
app.use((err, req, res, next) => {
  if (err.status >= 500) {
    errorMessage('router', err)
  }
  res.status(err.status || 500).json({
    error: err.message
  })
})

// Start API server
server = app.listen(process.env.PORT || 3000, () => {
  serverStarted = true
  const addr = server.address()
  logMessage('router', `API started at port ${addr.port}`)
})