const { simpleParser } = require('mailparser');
const db = require('./db');

async function saveEmail(stream) {
    try {
        const parsed = await simpleParser(stream);
        const rawEmail = stream.toString(); // Or handle stream to buffer conversion appropriately

        const recipient = parsed.to ? parsed.to.text : 'undisclosed-recipients';
        const sender = parsed.from ? parsed.from.text : 'unknown-sender';
        const subject = parsed.subject;
        const body = parsed.text || (parsed.html || '');

        const [result] = await db.execute(
            'INSERT INTO emails (recipient, sender, subject, body, raw) VALUES (?, ?, ?, ?, ?)',
            [recipient, sender, subject, body, rawEmail]
        );

        console.log(`Email from <${sender}> to <${recipient}> saved with ID: ${result.insertId}`);

        if (parsed.attachments && parsed.attachments.length > 0) {
            for (const attachment of parsed.attachments) {
                await db.execute(
                    'INSERT INTO email_attachments (email_id, filename, content_type, content) VALUES (?, ?, ?, ?)',
                    [result.insertId, attachment.filename, attachment.contentType, attachment.content]
                );
                console.log(`Attachment ${attachment.filename} saved.`);
            }
        }
    } catch (error) {
        console.error('Failed to save email:', error);
        // We should not exit the process here, but maybe throw the error
        // so the caller (SMTPServer) can handle it.
        throw error;
    }
}

module.exports = { saveEmail };