// Node.js/Nodemailer configuration for MailHog

const nodemailer = require('nodemailer');

// Development configuration (using MailHog)
const createDevTransporter = () => {
    return nodemailer.createTransporter({
        host: 'localhost',
        port: 1025,
        secure: false, // TLS not required for MailHog
        auth: false,   // No authentication required
        tls: {
            rejectUnauthorized: false
        },
        logger: true, // Enable logging for debugging
        debug: true   // Show debug output
    });
};

// Production configuration (using real SMTP)
const createProdTransporter = () => {
    return nodemailer.createTransporter({
        host: process.env.SMTP_HOST,
        port: parseInt(process.env.SMTP_PORT || '587'),
        secure: process.env.SMTP_SECURE === 'true', // true for 465, false for other ports
        auth: {
            user: process.env.SMTP_USER,
            pass: process.env.SMTP_PASS
        },
        tls: {
            rejectUnauthorized: true
        }
    });
};

// Get appropriate transporter based on environment
const getTransporter = () => {
    if (process.env.NODE_ENV === 'production') {
        return createProdTransporter();
    } else {
        return createDevTransporter();
    }
};

// Email sending function
const sendEmail = async (options) => {
    try {
        const transporter = getTransporter();

        const mailOptions = {
            from: options.from || process.env.EMAIL_FROM || 'test@sender.local',
            to: options.to,
            subject: options.subject,
            text: options.text,
            html: options.html,
            attachments: options.attachments
        };

        const info = await transporter.sendMail(mailOptions);

        console.log('Email sent successfully:', {
            messageId: info.messageId,
            response: info.response,
            accepted: info.accepted,
            rejected: info.rejected
        });

        return info;
    } catch (error) {
        console.error('Email sending failed:', error);
        throw error;
    }
};

// Example usage
if (require.main === module) {
    (async () => {
        try {
            await sendEmail({
                to: 'test@recipient.local',
                subject: 'Test Email from Nodemailer',
                text: 'This is a test email sent via Nodemailer',
                html: '<h1>Test Email</h1><p>This email was sent using Nodemailer with MailHog.</p>'
            });
            console.log('Test email sent successfully');
        } catch (error) {
            console.error('Failed to send test email:', error);
        }
    })();
}

module.exports = {
    sendEmail,
    createDevTransporter,
    createProdTransporter,
    getTransporter
};