const express = require('express');
const bodyParser = require('body-parser');
const path = require('path');
const winston = require('winston');
const rateLimit = require('express-rate-limit');
const fs = require('fs');

const logger = winston.createLogger({
  level: 'info',
  format: winston.format.combine(
    winston.format.timestamp(),
    winston.format.printf(({ timestamp, level, message }) => {
    return `${timestamp} [${level.toUpperCase()}] ${message}`;
    })
  ),
  transports: [
    new winston.transports.File({ filename: 'register.log' })
  ],
});

const exclusions = JSON.parse(fs.readFileSync('exclusions.json', 'utf8')).excludedIPs;

const registerLimiter = rateLimit({
  windowMs: 24 * 60 * 60 * 1000,
  max: 1,
  message: 'You have already submitted a registration today. Please try again tomorrow.',
  standardHeaders: true,
  legacyHeaders: false,
  skip: (req, res) => exclusions.includes(req.ip)
});

const app = express();

app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'src'));

app.use(bodyParser.urlencoded({ extended: false }));

app.use(express.static(path.join(__dirname, 'public')));

app.get('/', (req, res) => {
  res.render('index');
});

app.post('/register', registerLimiter, (req, res) => {
  const formData = req.body;
  logger.info(`New registration:
    Name: ${formData.name}
    Email: ${formData.email}
    Reason: ${formData.message}
    Telegram: ${formData.telegram}`);
  res.render('success');
});

app.get('/register', (req, res) => {
  res.render('register');
});

app.get('/services', (req, res) => {
  res.render('services');
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});