const rateLimit = require('express-rate-limit');

// General API rate limiter
const general = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100, // limit each IP to 100 requests per windowMs
  message: {
    error: 'Too many requests from this IP, please try again later.',
    retryAfter: 15 * 60 // 15 minutes in seconds
  },
  standardHeaders: true, // Return rate limit info in the `RateLimit-*` headers
  legacyHeaders: false, // Disable the `X-RateLimit-*` headers
});

// Email sending rate limiter
const email = rateLimit({
  windowMs: 60 * 60 * 1000, // 1 hour
  max: 10, // limit each IP to 10 emails per hour
  message: {
    error: 'Too many emails sent from this IP, please try again later.',
    retryAfter: 60 * 60 // 1 hour in seconds
  },
  standardHeaders: true,
  legacyHeaders: false,
  skipSuccessfulRequests: false, // Don't skip counting successful requests
});

// Represent API rate limiter (more restrictive)
const representAPI = rateLimit({
  windowMs: 60 * 1000, // 1 minute
  max: 60, // match the Represent API limit of 60 requests per minute
  message: {
    error: 'Represent API rate limit exceeded, please try again later.',
    retryAfter: 60 // 1 minute in seconds
  },
  standardHeaders: true,
  legacyHeaders: false,
});

module.exports = {
  general,
  email,
  representAPI
};