#!/usr/bin/env ts-node

/**
 * Nodemailer transport example for SMTP over WebSocket
 */

import nodemailer from 'nodemailer';
import { createTransport } from '../src/index';

async function nodemailerTransportExample() {
    console.log('Nodemailer SMTP WebSocket Transport Example\n');

    // Create the WebSocket transport
    const transport = createTransport({
        host: '192.168.0.62',
        apiKey: 'cebc9a7f-4e0c-4fda-9dd0-85f48c02800c',
        port: 80,
        secure: false, // Set to true for wss://
        debug: true
    });

    // Create Nodemailer transporter
    const transporter = nodemailer.createTransport(transport);

    // Verify the transport configuration
    try {
        console.log('Verifying transport configuration...');
        await transporter.verify();
        console.log('Transport verification successful\n');
    } catch (error) {
        console.error('Transport verification failed:', error);
        return;
    }

    // Send a test email
    try {
        console.log('Sending test email...');
        
        const info = await transporter.sendMail({
            from: 'cudconnex@satitm.chula.ac.th',
            to: 'siwat.s@chula.ac.th',
            subject: 'Test Email via SMTP WebSocket',
            text: 'This email was sent using the SMTP WebSocket transport!',
            html: `
                <h1>Test Email</h1>
                <p>This email was sent using the <strong>SMTP WebSocket transport</strong>!</p>
                <p>Features:</p>
                <ul>
                    <li>Automatic connection management</li>
                    <li>Queue-based message handling</li>
                    <li>Nodemailer compatibility</li>
                    <li>WebSocket-based SMTP relay</li>
                </ul>
                <p><strong>This email includes a test attachment!</strong></p>
            `,
            attachments: [
                {
                    filename: 'test-attachment.txt',
                    content: Buffer.from(`This is a test attachment generated at ${new Date().toISOString()}\n\nRandom data: ${Math.random()}\nUUID: ${Date.now()}-${Math.random().toString(36).substr(2, 9)}\n\nFeatures tested:\n- File attachment support\n- Binary content handling\n- MIME multipart encoding\n- WebSocket SMTP transport\n\nEnd of test file.`, 'utf8'),
                    contentType: 'text/plain'
                }
            ]
        });

        console.log('Email sent successfully!');
        console.log('Message ID:', info.messageId);
        console.log('Accepted recipients:', info.accepted);
        console.log('Rejected recipients:', info.rejected);
        console.log('Response:', info.response);

    } catch (error) {
        console.error('Failed to send email:', error);
    } finally {
        // Close the transport
        console.log('\nClosing transport...');
        await transport.close();
        console.log('Transport closed');
    }
}

// Run the example
if (require.main === module) {
    nodemailerTransportExample()
        .then(() => {
            console.log('\nNodemailer transport example completed successfully');
            process.exit(0);
        })
        .catch((error) => {
            console.error('\nExample failed:', error);
            process.exit(1);
        });
}

export { nodemailerTransportExample };