const nodemailer = require('nodemailer');
const express = require('express');
const path = require('path');
const { Pool } = require('pg');
const rateLimit = require('express-rate-limit');
require('dotenv').config();
const app = express();
const port = process.env.SERVER_PORT || 3000;

// Middleware to parse incoming JSON data from the frontend
app.use(express.json());

// Middleware to serve static files (like index.html, styles.css, script.js)
const STATIC_DIR = process.env.STATIC_DIR || 'public'
app.use(express.static(path.join(__dirname, STATIC_DIR)));

// Database connection pool setup using environment variables for security
const pool = new Pool({
    user: process.env.DB_USER,
    host: process.env.DB_HOST,
    database: process.env.DB_DATABASE,
    password: process.env.DB_PASSWORD,
    port: process.env.DB_PORT,
});

// Nodemailer transporter setup for sending emails
const transporter = nodemailer.createTransport({
    host: process.env.EMAIL_HOST,
    port: process.env.EMAIL_PORT,
    secure: false,
    requireTLS: true,
    auth: {
        user: process.env.EMAIL_USER,
        pass: process.env.EMAIL_PASS,
    },
});

const contactController = require('./controllers/contactController')(pool, transporter);

// Import the security middleware
const securityMw = require('./middleware/securityMw');

// Import contactRoutes and contactController, and pass in securityMw
const contactRoutes = require('./routes/contactRoutes')(contactController, securityMw);

// Use contactRoutes to connect the modular router to the main app
app.use(contactRoutes);

// Start the server
app.listen(port, () => {
    console.log(`Server listening at http://localhost:${port}`);
});