const http = require('http');
const fs = require('fs');
const path = require('path');
const nodemailer = require('nodemailer');

const PORT = 80;
const STATIC_DIR = path.join(__dirname, 'public');

const SMTP_HOST = process.env.SMTP_HOST || 'mail.rmail.online';
const SMTP_PORT = parseInt(process.env.SMTP_PORT || '587');
const SMTP_USER = process.env.SMTP_USER;
const SMTP_PASS = process.env.SMTP_PASS;
const SMTP_FROM = process.env.SMTP_FROM || SMTP_USER;
const CONTACT_TO = process.env.CONTACT_TO || 'noire.michelle@gmail.com';

const transporter = nodemailer.createTransport({
    host: SMTP_HOST,
    port: SMTP_PORT,
    secure: false,
    auth: { user: SMTP_USER, pass: SMTP_PASS },
    tls: { rejectUnauthorized: false }
});

const MIME = {
    '.html': 'text/html',
    '.css': 'text/css',
    '.js': 'application/javascript',
    '.jpg': 'image/jpeg',
    '.jpeg': 'image/jpeg',
    '.png': 'image/png',
    '.gif': 'image/gif',
    '.svg': 'image/svg+xml',
    '.ico': 'image/x-icon',
    '.webp': 'image/webp',
    '.woff2': 'font/woff2',
    '.woff': 'font/woff',
};

function serveStatic(req, res) {
    let filePath = path.join(STATIC_DIR, req.url === '/' ? 'index.html' : req.url);
    filePath = path.normalize(filePath);
    if (!filePath.startsWith(STATIC_DIR)) {
        res.writeHead(403);
        res.end();
        return;
    }

    const ext = path.extname(filePath).toLowerCase();
    const contentType = MIME[ext] || 'application/octet-stream';

    fs.readFile(filePath, (err, data) => {
        if (err) {
            res.writeHead(404, { 'Content-Type': 'text/plain' });
            res.end('Not found');
            return;
        }
        res.writeHead(200, {
            'Content-Type': contentType,
            'Cache-Control': ext === '.html' ? 'no-cache' : 'public, max-age=86400'
        });
        res.end(data);
    });
}

function handleContact(req, res) {
    let body = '';
    req.on('data', chunk => { body += chunk; });
    req.on('end', async () => {
        try {
            const { name, email, subject, message } = JSON.parse(body);

            if (!name || !email || !message) {
                res.writeHead(400, { 'Content-Type': 'application/json' });
                res.end(JSON.stringify({ error: 'Name, email, and message are required' }));
                return;
            }

            await transporter.sendMail({
                from: `"Cineasthesia Contact" <${SMTP_FROM}>`,
                replyTo: `"${name}" <${email}>`,
                to: CONTACT_TO,
                subject: `[Cineasthesia] ${subject || 'Contact Form Message'}`,
                text: `Name: ${name}\nEmail: ${email}\nSubject: ${subject || '(none)'}\n\nMessage:\n${message}`,
                html: `
                    <div style="font-family: sans-serif; max-width: 600px;">
                        <h2 style="color: #3C2415; border-bottom: 2px solid #C68B3F; padding-bottom: 8px;">New Contact Form Message</h2>
                        <p><strong>Name:</strong> ${name}</p>
                        <p><strong>Email:</strong> <a href="mailto:${email}">${email}</a></p>
                        <p><strong>Subject:</strong> ${subject || '(none)'}</p>
                        <hr style="border: none; border-top: 1px solid #E8DBC8; margin: 16px 0;">
                        <p style="white-space: pre-wrap;">${message}</p>
                        <hr style="border: none; border-top: 1px solid #E8DBC8; margin: 16px 0;">
                        <p style="font-size: 12px; color: #7a6f64;">Sent from cineasthesia.com contact form</p>
                    </div>
                `
            });

            console.log(`Contact form sent: ${name} <${email}> — ${subject || '(no subject)'}`);
            res.writeHead(200, { 'Content-Type': 'application/json' });
            res.end(JSON.stringify({ ok: true }));
        } catch (err) {
            console.error('Contact form error:', err.message);
            res.writeHead(500, { 'Content-Type': 'application/json' });
            res.end(JSON.stringify({ error: 'Failed to send message' }));
        }
    });
}

const server = http.createServer((req, res) => {
    if (req.method === 'POST' && req.url === '/api/contact') {
        handleContact(req, res);
    } else {
        serveStatic(req, res);
    }
});

server.listen(PORT, () => {
    console.log(`Cineasthesia server running on port ${PORT}`);
    console.log(`Contact emails → ${CONTACT_TO}`);
});