class Email {
    constructor(from, to, subject, body, html = null, attachments = []) {
        this.from = from;
        this.to = to;
        this.subject = subject;
        this.body = body;
        this.html = html;  // Optional HTML version
        this.attachments = attachments;
        this.boundary = `----Boundary${Math.random().toString(36).substring(2)}`;  // Unique boundary string
    }

    format() {
        let emailString = `From: ${this.from}\r\nTo: ${this.to}\r\nSubject: ${this.subject}\r\nMIME-Version: 1.0\r\nContent-Type: multipart/mixed; boundary="${this.boundary}"\r\n\r\n`;

        // Add body as text or both text and HTML parts
        if (this.body) {
            emailString += `--${this.boundary}\r\nContent-Type: text/plain; charset="UTF-8"\r\n\r\n${this.body}\r\n`;
        }
        if (this.html) {
            emailString += `--${this.boundary}\r\nContent-Type: text/html; charset="UTF-8"\r\n\r\n${this.html}\r\n`;
        }

        // Add attachments if any
        if (this.attachments.length > 0) {
            this.attachments.forEach(attachment => {
                emailString += `--${this.boundary}\r\nContent-Disposition: attachment; filename="${attachment.filename}"\r\nContent-Type: ${attachment.contentType}; name="${attachment.filename}"\r\nContent-Transfer-Encoding: base64\r\n\r\n${attachment.content}\r\n`;
            });
        }

        // Close the MIME message
        emailString += `--${this.boundary}--\r\n`;
        return emailString;
    }
}

export default Email;